CN107082467B - Iron oxyhydroxide nanorod/foam carbon composite material and preparation method and application thereof - Google Patents
Iron oxyhydroxide nanorod/foam carbon composite material and preparation method and application thereof Download PDFInfo
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- CN107082467B CN107082467B CN201710166405.6A CN201710166405A CN107082467B CN 107082467 B CN107082467 B CN 107082467B CN 201710166405 A CN201710166405 A CN 201710166405A CN 107082467 B CN107082467 B CN 107082467B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
- B01J20/28002—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their physical properties
- B01J20/28004—Sorbent size or size distribution, e.g. particle size
- B01J20/28007—Sorbent size or size distribution, e.g. particle size with size in the range 1-100 nanometers, e.g. nanosized particles, nanofibers, nanotubes, nanowires or the like
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/103—Arsenic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
Abstract
The invention discloses a ferric hydroxide nanorod/foam carbon composite material as well as a preparation method and application thereof. The iron oxyhydroxide nanorod/foam carbon composite material is prepared by uniformly loading the iron oxyhydroxide nanorod on a foam carbon substrate by a hydrothermal synthesis method. The iron oxyhydroxide nanorod/foam carbon composite material can be directly used as an adsorbent for removing arsenic element in a water body. The method has the advantages of strong adsorption capacity, small secondary pollution, easy separation and recovery, high mass transfer rate and low cost, and can be used for quickly, efficiently and selectively removing the arsenic element in the water body.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a ferric hydroxide nanorod/foam carbon composite material and a preparation method and application thereof.
Background
Arsenic is a highly toxic pollutant with teratogenic and mutagenic effects and widely exists in nature. If a human body is exposed to an environment with low or high arsenic concentrations for a long time, the human body may bring irreversible damage to the digestive system, respiratory system, nervous system, cardiovascular system, reproductive system, etc., and even death may occur in severe cases. The limit of arsenic concentration in human drinking water is 10 mug/L according to the regulations of the world health organization. In waterArsenic in the body environment is mainly trivalent arsenic (H)3AsO3、H2AsO3 -、HAsO3 2-) And pentavalent arsenic (H)3AsO4、H2AsO4 -、HAsO4 2-) In the form of trivalent arsenic, and is more toxic and mobile in water. In order to protect human health and eliminate the negative influence of arsenic pollution on an ecosystem, controlling the content of arsenic in a water body becomes a key problem to be solved urgently.
At present, the methods for removing arsenic in water mainly comprise a coagulating sedimentation method, a biological arsenic removal method, an electrocoagulation method, a membrane filtration method, a pre-oxidation method, an ion exchange method, an adsorption method and the like. Compared with other methods, the adsorption method has the advantages of simple design, easy operation, insensitivity to toxic pollutants, no introduction of new harmful pollutants and the like, can overcome the defect of difficult arsenic element recovery, and can solve the problems of high consumption of chemicals in a coagulating sedimentation method, large capital investment of a biological arsenic removal method and the like, so the adsorption method is considered to be an efficient and economic water treatment mode. In the prior art, traditional adsorbents such as activated carbon, zeolite, metal oxide, clay and the like are applied to water bodies in large quantities to remove arsenic, but the traditional adsorbents have the problems of small adsorption quantity, low efficiency, difficult separation and recovery and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides the iron oxyhydroxide nanorod/foam carbon composite material, and the preparation method and the application thereof, wherein the iron oxyhydroxide nanorod/foam carbon composite material has the advantages of strong adsorption capacity, small secondary pollution, easy separation and recovery, high mass transfer rate and low cost, and can be used for quickly, efficiently and selectively removing arsenic elements in a water body.
The purpose of the invention is realized by the following technical scheme:
the composite material is prepared with foamed carbon as base and homogeneously loaded iron oxyhydroxide nanorods.
The preparation method of the iron oxyhydroxide nanorod/foam carbon composite material comprises the following steps:
step A, mixing a hydrochloric acid solution, deionized water and acetonitrile according to the proportion of 11.88mL of deionized water and 28mL of acetonitrile in every 120 mu L of hydrochloric acid solution with solute mass fraction of 37.5% to prepare a first reaction solution;
step B, using 0.0135mol of FeCl per 40ml of the first reaction solution3And 0.04mol of NaNO3In a ratio of FeCl3And NaNO3Dissolving in the first reaction solution, stirring for 30min, adding acidified foam carbon, continuing stirring for 1 hour, transferring to a reaction kettle, carrying out hydrothermal reaction for 4 hours at 100 ℃, and then cleaning and drying to obtain the iron oxyhydroxide nanorod/foam carbon composite material.
Preferably, the acidified carbon foam is prepared by the following method: heating the foam at a heating rate of 5 ℃ per minute until the temperature rises to 700 ℃, preserving the heat for 2 hours, then putting the foam into a nitric acid solution with the concentration of 3.5mol/L, and boiling the foam for 2 hours at 120 ℃ to obtain the acidified carbon foam.
Preferably, said washing and drying comprises: washing with deionized water for several times, and drying in a drying oven at 60 deg.C.
The iron oxyhydroxide nanorod/foam carbon composite material is used as an adsorbent for removing arsenic in a water body.
Preferably, the dosage of the adsorbent in the water body is 0.5 g/L.
Preferably, when the adsorbent is used for adsorption treatment in a water body, the pH value of the water body is controlled to be 7, and the time of the adsorption treatment is controlled to be 24 hours.
According to the technical scheme provided by the invention, the iron oxyhydroxide nanorod/carbon foam composite material provided by the invention is uniformly loaded on the carbon foam substrate by adopting a hydrothermal synthesis method. The iron oxyhydroxide nanorod/foam carbon composite material can be directly used as an adsorbent for removing arsenic in a water body, and the maximum removal amount of trivalent arsenic in the water body can reach 103.4mg/g and the maximum removal amount of pentavalent arsenic in the water body can reach 172.9mg/g according to calculation of a Langmuir adsorption model. Compared with the prior art, the iron oxyhydroxide nanorod/foam carbon composite material provided by the invention has the advantages of strong adsorption capacity, small secondary pollution, easiness in separation and recovery, high mass transfer rate and low cost, and can be used for quickly, efficiently and selectively removing arsenic elements in a water body.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a scanning electron microscope photograph of the iron oxyhydroxide nanorod/carbon foam composite material provided in example 1 of the present invention.
FIG. 2 is an X-ray diffraction pattern of the iron oxyhydroxide nanorod/carbon foam composite material provided in example 1 of the present invention.
Fig. 3 is a schematic diagram of the adsorption kinetics of ferric oxide hydroxide nanorod/carbon foam composite material provided in embodiment 1 of the present invention for trivalent arsenic and pentavalent arsenic in a water body at different time points, and a fitting result.
Fig. 4 is a schematic view of the adsorption effect of the iron oxyhydroxide nanorod/carbon foam composite material on trivalent arsenic and pentavalent arsenic in a water body under different arsenic concentrations according to embodiment 1 of the present invention.
Fig. 5 is a schematic view of the adsorption effect of the iron oxyhydroxide nanorod/carbon foam composite material on trivalent arsenic and pentavalent arsenic in a water body under different anion concentrations, according to embodiment 1 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
The iron oxyhydroxide nanorod/carbon foam composite material provided by the embodiment of the invention, and the preparation method and the application thereof are described in detail below.
The composite material is prepared with foamed carbon as base and homogeneously loaded iron oxyhydroxide nanorods.
Specifically, the iron oxyhydroxide nanorod/carbon foam composite material is prepared by uniformly loading iron oxyhydroxide nanorods on a carbon foam substrate by a hydrothermal synthesis method, and the method specifically comprises the following steps:
and step A, mixing the hydrochloric acid solution, the deionized water and the acetonitrile together according to the proportion of using 11.88mL of deionized water and 28mL of acetonitrile for every 120 mu L of hydrochloric acid solution with 37.5 mass percent of solute, thereby preparing a first reaction solution.
Step B, using 0.0135mol of FeCl per 40ml of the first reaction solution3And 0.04mol of NaNO3In a ratio of FeCl3And NaNO3Dissolving in the first reaction solution, stirring for 30min, adding acidified foam carbon, continuing stirring for 1 h, transferring to a reaction kettle, carrying out hydrothermal reaction for 4 h at 100 ℃, washing and drying (preferably washing with deionized water for multiple times, and then drying in a drying oven at a drying temperature of 60 ℃), thus obtaining the iron oxyhydroxide nanorod/foam carbon composite material.
In step B, the acidified carbon foam can be prepared by the following method: and (3) heating and carbonizing the foam at a temperature rise rate of 5 ℃ per minute until the temperature rises to 700 ℃, preserving the heat for 2 hours, then putting the foam into a nitric acid solution with the concentration of 3.5mol/L, and boiling the foam for 2 hours at 120 ℃, thereby obtaining the acidified carbon foam. In practice, it is preferable to use a 3X 1.5X 0.6cm block of acidified carbon foam per 40ml of the first reaction solution in step B.
Furthermore, the hydroxyl ferric oxide nano rod provided by the inventionThe/foam carbon composite material can be directly used as an adsorbent for removing arsenic element in water, the dosage of the adsorbent in the water is preferably 0.5g/L, and when the adsorbent is subjected to adsorption treatment in the water, the pH value of the water is preferably controlled to be 7, and the time of the adsorption treatment is preferably controlled to be 24 hours. In practical application, the adsorption performance of the adsorbent provided by the invention on trivalent arsenic (namely As (III)) and pentavalent arsenic (namely As (V)) in a water body can be tested by adopting the following scheme: preparing As (III) solution and As (V) solution with certain concentration, adjusting the temperature and pH value of the solution, adding the adsorbent provided by the invention, continuously stirring, and measuring the arsenic content by ICP (inductively coupled plasma), thereby obtaining the adsorption capacity of the adsorbent on arsenic; preparing anion SO with a certain concentration4 2-、NO3 -、Cl-、PO4 3-The adsorbent provided by the invention is added when the pH value and the temperature of the mixed solution reach the best, after the mixed solution is continuously stirred for 24 hours, the content of As (III) and As (V) is measured by ICP, and the obtained adsorption quantity is the selective adsorption performance of the adsorbent provided by the invention under the coexistence of various anions.
In conclusion, compared with the prior art, the method provided by the embodiment of the invention has the advantages of strong adsorption capacity, small secondary pollution, easiness in separation and recovery, high mass transfer rate and low cost, and can be used for quickly, efficiently and selectively removing the arsenic element in the water body.
In order to more clearly show the technical scheme and the technical effects thereof provided by the present invention, the iron oxyhydroxide nanorod/carbon foam composite material provided by the embodiment of the present invention, and the preparation method and the application thereof are described in detail with specific embodiments below.
Example 1
A hydroxyl ferric oxide nanorod/foam carbon composite material is prepared by the following steps:
step a, mixing 120 mu L of hydrochloric acid solution with solute mass fraction of 37.5%, 11.88mL of deionized water and 28mL of acetonitrile together to prepare a first reaction solution.
And b, heating the foam at a heating rate of 5 ℃ per minute until the temperature is raised to 700 ℃, preserving the heat for 2 hours, putting the foam into a nitric acid solution with the concentration of 3.5mol/L, and boiling the foam for 2 hours at 120 ℃ to obtain the acidified carbon foam.
Step c, 0.0135mol of FeCl3And 0.04mol of NaNO3Dissolving the mixture in 40ml of the first reaction solution prepared in the step a, stirring for 30min, adding the acidified foam carbon prepared in the step b, continuously stirring for 1 hour, transferring the mixture into a 50ml reaction kettle, carrying out hydrothermal reaction for 4 hours at 100 ℃, washing the mixture for multiple times by using deionized water, and then putting the mixture into a drying box to dry at the drying temperature of 60 ℃ to prepare the iron oxyhydroxide nanorod/foam carbon composite material.
Specifically, the following morphology and performance tests are performed on the iron oxyhydroxide nanorod/carbon foam composite material provided in embodiment 1 of the present invention:
(1) observing the acidified foam carbon prepared in the step b and the iron oxyhydroxide nanorod/foam carbon composite material prepared in the step c in the embodiment 1 of the invention by using a scanning electron microscope to obtain a scanning electron microscope photo as shown in fig. 1; wherein, fig. 1a is a scanning electron microscope picture of the acidified foam carbon prepared in step b of example 1 of the present invention, and fig. 1b, fig. 1c and fig. 1d are scanning electron microscope pictures of the iron oxyhydroxide nanorod/foam carbon composite material prepared in step c of example 1 of the present invention at different magnification ratios. As can be seen from fig. 1a, 1b, 1c and 1 d: the acidified carbon foam prepared in step b of example 1 of the present invention has a three-dimensional network structure, while the iron oxyhydroxide nanorods/carbon foam composite material prepared in step c of example 1 of the present invention have a roughened surface of carbon foam and are uniformly distributed with the iron oxyhydroxide nanorods.
(2) The iron oxyhydroxide nanorod/carbon foam composite material provided by the embodiment 1 of the invention is observed by an X-ray diffractometer, so that an X-ray diffraction pattern shown in figure 2 is obtained. As can be seen from fig. 2: the product on the surface of the foam carbon is iron oxyhydroxide.
(3) Preparing a trivalent arsenic solution with the concentration of 10ppm and a pentavalent arsenic solution with the concentration of 1000ppm, and respectively taking out 9 parts of 20ml of 10ppm trivalent arsenic solution and pentavalent arsenic solutionLiquid, each part of the solution is sequentially added with 0.05mol/L HNO3NaOH is used for adjusting the pH value to 7, and then 10mg of the iron oxyhydroxide nanorod/foam carbon composite material provided by the embodiment 1 of the invention is respectively added into each solution to be used as an adsorbent; immediately timing by using a stopwatch after the adsorbent is added, continuously stirring at 25 ℃, then respectively moving partial liquid for 5min, 10min, 15min, 20min, 30min, 60min, 120min, 270min, 340min, 500min, 630min and 760min, centrifuging and filtering by using a 0.22 mu m filter membrane, collecting and marking filtrate, and finally testing the concentrations of the trivalent arsenic solution (namely As (III)) and the pentavalent arsenic solution (namely As (V)) at different time points, thereby obtaining the schematic diagram of the adsorption kinetic performance and the fitting result of the trivalent arsenic and the pentavalent arsenic in the water body at different time points as shown in figure 3; fig. 3a is a schematic diagram of adsorption kinetics of ferric oxyhydroxide nanorod/carbon foam composite material provided in embodiment 1 of the present invention for trivalent arsenic and pentavalent arsenic in a water body at different time points, and fig. 3b is a fitting result of a quasi-first order kinetics model to data in fig. 3 a. As can be seen from fig. 3a and 3 b: the iron oxyhydroxide nanorod/foam carbon composite material provided by the embodiment 1 of the invention has good adsorption performance on low-concentration arsenic under a neutral condition, and has high arsenic removal efficiency; meanwhile, the iron oxyhydroxide nanorod/foam carbon composite material provided by the embodiment 1 of the invention can completely remove arsenic within 6 hours of adsorbing the arsenic, so that the iron oxyhydroxide nanorod/foam carbon composite material has high adsorption efficiency.
(4) Preparing trivalent arsenic solutions of 5ppm, 10ppm, 20ppm, 40ppm, 80ppm, 100ppm, 200ppm, 400ppm, 800ppm and 1000ppm and pentavalent arsenic solutions by using 1000ppm of the trivalent arsenic solution and the pentavalent arsenic solution, taking 20ml of arsenic solutions with different concentrations, adjusting the pH value to 7, then respectively adding 10mg of the iron oxyhydroxide nanorod/foam carbon composite material provided by the invention in the example 1 into each solution to serve as an adsorbent, continuously stirring for 24 hours at 25 ℃, then centrifuging a part of the solution, passing through a 0.22 mu m filter membrane, collecting the filtrate and marking, and respectively testing the concentrations of the trivalent arsenic solutions (namely as (III)) and the pentavalent arsenic solutions (namely as (V)), thereby obtaining a schematic diagram of the adsorption effect of the trivalent arsenic and the pentavalent arsenic in the water body under the conditions of different arsenic concentrations as shown in fig. 4. As can be seen from fig. 4: when the concentration of arsenic is low, the adsorption capacity of the iron oxyhydroxide nanorod/foam carbon composite material provided by the embodiment 1 of the invention is continuously increased along with the increase of the concentration of arsenic; after the arsenic concentration exceeds 400ppm, the adsorption quantity of the arsenic changes little along with the increase of the arsenic concentration; calculated according to the Langmuir adsorption model, the maximum removal amount of the ferric hydroxide nanorod/carbon foam composite material provided by the embodiment 1 of the invention to the trivalent arsenic in the water body can reach 103.4mg/g, and the maximum removal amount to the pentavalent arsenic in the water body can reach 172.9mg/g, so that the iron hydroxide nanorod/carbon foam composite material has great advantages compared with the existing adsorbent.
(5) Preparing trivalent arsenic solution and pentavalent arsenic solution with concentration of 20mg/L, and mixing the trivalent arsenic solution and pentavalent arsenic solution with NaCl and Na respectively2SO4、KNO3、NaH2PO4Mixing to prepare a mixed solution of trivalent arsenic and NaCl, and trivalent arsenic and Na2SO4Mixed solution of (1), trivalent arsenic and KNO3Mixed solution of (1), trivalent arsenic and NaH2PO4Mixed solution of (1), mixed solution of pentavalent arsenic and NaCl, pentavalent arsenic and Na2SO4Mixed solution of (A), pentavalent arsenic and KNO3Mixed solution of (A), pentavalent arsenic and NaH2PO4The pH value of the mixed solution is adjusted to 7, 10mg of the iron oxyhydroxide nanorod/carbon foam composite material provided by the invention in the embodiment 1 is added into each mixed solution as an adsorbent, the mixed solution is continuously stirred for 24 hours at 25 ℃, part of the liquid is removed and centrifuged and passes through a 0.22 mu m filter membrane, the filtrate is collected and marked, and the concentrations of the trivalent arsenic solution (i.e. As (III)) and the pentavalent arsenic solution (i.e. As (V)) are respectively tested, so that the schematic diagram of the adsorption effect of the trivalent arsenic and the pentavalent arsenic in the water body under different anion concentrations as shown in figure 5 is obtained. As can be seen from fig. 5: although the iron oxyhydroxide nanorod/carbon foam composite material provided in embodiment 1 of the invention has a reduced adsorption performance on trivalent arsenic and pentavalent arsenic under the interference of other competitive ions, the iron oxyhydroxide nanorod/carbon foam composite material still maintains a high removal rate on trivalent arsenic and pentavalent arsenic.
In conclusion, the embodiment of the invention has the advantages of strong adsorption capacity, small secondary pollution, easy separation and recovery, high mass transfer rate and low cost, and can quickly, efficiently and selectively remove the arsenic element in the water body.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A preparation method of a hydroxyl iron oxide nanorod/foam carbon composite material is characterized by comprising the following steps:
step A, mixing a hydrochloric acid solution, deionized water and acetonitrile according to the proportion of 11.88mL of deionized water and 28mL of acetonitrile in every 120 mu L of hydrochloric acid solution with solute mass fraction of 37.5% to prepare a first reaction solution;
step B, using 0.0135mol of FeCl per 40ml of the first reaction solution3And 0.04mol of NaNO3In a ratio of FeCl3And NaNO3Dissolving in the first reaction solution, adding acidified foam carbon after stirring for 30min, continuing stirring for 1 hour, transferring the mixture into a reaction kettle, carrying out hydrothermal reaction for 4 hours at 100 ℃, and then cleaning and drying to obtain the iron oxyhydroxide nanorod/foam carbon composite material;
the iron oxyhydroxide nanorod/foam carbon composite material takes foam carbon as a substrate, and the iron oxyhydroxide nanorods are uniformly loaded on the substrate.
2. The method for preparing a FeOOH nanorod/foam carbon composite material according to claim 1, wherein the acidified foam carbon is prepared by the following method: heating the foam at a heating rate of 5 ℃ per minute until the temperature rises to 700 ℃, preserving the heat for 2 hours, then putting the foam into a nitric acid solution with the concentration of 3.5mol/L, and boiling the foam for 2 hours at 120 ℃ to obtain the acidified carbon foam.
3. The method for preparing a iron oxyhydroxide nanorod/carbon foam composite material according to claim 1 or 2, wherein the washing and drying includes: washing with deionized water for several times, and drying in a drying oven at 60 deg.C.
4. A iron oxyhydroxide nanorod/carbon foam composite material, characterized by being prepared by the method for preparing the iron oxyhydroxide nanorod/carbon foam composite material of any one of claims 1 to 3.
5. The use of the iron oxyhydroxide nanorod/carbon foam composite material of claim 4 as an adsorbent for removing arsenic from a water body.
6. The use of the iron oxyhydroxide nanorod/carbon foam composite material of claim 5, wherein the adsorbent is used in an amount of 0.5g/L in a water body.
7. The use of the iron oxyhydroxide nanorod/carbon foam composite material according to claim 5 or 6, wherein when the adsorbent is used for adsorption treatment in a water body, the pH value of the water body is controlled to be 7, and the adsorption treatment time is controlled to be 24 hours.
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| CN102909021A (en) * | 2012-11-01 | 2013-02-06 | 新疆大学 | Batch-preparation and quick-separation method of iron-based coal-liquefaction nano catalyst |
| CN103691300A (en) * | 2013-12-23 | 2014-04-02 | 北京三聚环保新材料股份有限公司 | Preparation method of normal-temperature iron desulfurizer |
| CN104923160A (en) * | 2015-07-03 | 2015-09-23 | 河北工业大学 | Preparation method for composite material for adsorbing heavy metal ions in sewage and wastewater |
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