CN108404940B - A kind of preparation method and application of perite nanometer piece - Google Patents

A kind of preparation method and application of perite nanometer piece Download PDF

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CN108404940B
CN108404940B CN201810105601.7A CN201810105601A CN108404940B CN 108404940 B CN108404940 B CN 108404940B CN 201810105601 A CN201810105601 A CN 201810105601A CN 108404940 B CN108404940 B CN 108404940B
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nanometer piece
bismuth
preparation
perite nanometer
light
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CN108404940A (en
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高晓亚
唐光贝
郭倩
彭稳
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Kunming University of Science and Technology
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/06Halogens; Compounds thereof
    • B01J35/39
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02Impregnation, coating or precipitation
    • B01J37/03Precipitation; Co-precipitation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B82NANOTECHNOLOGY
    • B82YSPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00Manufacture or treatment of nanostructures
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01GCOMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G29/00Compounds of bismuth
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/30Treatment of water, waste water, or sewage by irradiation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/34Organic compounds containing oxygen
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/36Organic compounds containing halogen
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/38Organic compounds containing nitrogen
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • C02F2101/40Organic compounds containing sulfur
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00Use of specific compounds during water treatment
    • C02F2305/10Photocatalysts

Abstract

The invention discloses a kind of preparation methods of perite nanometer piece, belong to environmental chemical engineering photocatalysis water-treatment technology field, tetrabutylammonium hydroxide is dissolved in deionized water by this method, chloride is added, bismuth salt is added again, the precipitating that stirring obtains after standing is cleaned with deionized water and ethyl alcohol, and perite nanometer piece is made after dry;The present invention synthesizes catalysis material with innocuous agents by simple method, meets environmentally protective requirement, which has the ability of stronger degradation of contaminant under visible light or/and full light;There is higher application value in fields such as pollution control, new energy preparation and selective catalytic oxidations.

Description

A kind of preparation method and application of perite nanometer piece
Technical field
The present invention relates to a kind of preparation method and applications of visible-light response type perite nanometer piece, belong to environmental chemical engineering light It is catalyzed water-treatment technology field.
Background technique
With the development of dye industry, produces waste water and have become one of currently the most important pollution source of water body;Dyestuff is dirty Water has the characteristics that color depth, complicated component, COD value are higher and difficult to degrade, brings serious harm to ecological environment.Place at present The method of reason waste water from dyestuff mainly has: absorption method, membrane separation process, photocatalytic oxidation, electrochemical oxidation process, ultrasonic degradation skill Art etc..Photocatalytic oxidation has the characteristics that energy-efficient, contaminant degradation is thorough.TiO2It is the photocatalysis being most widely used Agent, but its wider band gap (~3.2 eV) makes its that only light to wavelength less than 387 nm generates response, and to accounting for solar energy 45~50% wavelength is that the visible light of 400~750 nm does not respond to but.The crystal structure of chlorine oxygen bismuth is PbFCl type, symmetrically Property: D4h, space group: P4/nmm belongs to tetragonal crystal system.Chlorine oxygen bismuth has layer structure, the chlorine oxygen bismuth atom layer of dual layer arrangement Between by Cl atom pass through non-bonding force (Van der Waals force) combine.Chlorine oxygen bismuth valence band is mainly O2pAnd Cl3pIt occupies, conduction band is mainly Bi6pThe contribution of track.The layer structure of chlorine oxygen bismuth high anisotropy is convenient for the separation of photo-generate electron-hole, ensure that bismuth nitrate Well stable photocatalytic activity;However broad-band gap (~3.4 eV) equally limits utilization of the chlorine oxygen bismuth to visible light.Therefore, How to make the band-gap energy of chlorine oxygen bismuth reduces, and becomes focus concerned by people using solar energy so as to more sufficiently effective.Currently, Has the correlative study of some enhancing chlorine oxygen bismuth visible light response activities by wide coverage.Xiong etc. reports auxiliary in mannitol The lower two-dimentional perite nanometer piece that square is prepared for using hydro-thermal method is helped, the band gap of the catalyst is obviously reduced (~2.92 EV);The catalyst shows good photocatalytic activity to rhodamine B under visible light, and catalyst amount is 0.5 gL-1 When, 10-5 mol·L-1Rhodamine B solution is degradable in 8 minutes (RSC Advances, 2011,1:1542-1553). The band gap of chlorine oxygen bismuth is reduced to 2.65 eV from 3.5 eV by the irradiation of ultraviolet light by Ye et al..This is because the photograph of ultraviolet light Penetrating makes to form Lacking oxygen in chlorine oxygen bismuth catalyst body phase.Under visible light illumination, degrading activity of the catalyst to rhodamine B Than the catalyst before ultraviolet light activity improve nearly 20 times (Phys. Chem. Chem. Phys., 2012,14: 82-85).Chen et al. is prepared for chlorine oxygen bismuth (~2.87 using bismuth trichloride and nitric acid as raw material under l- lysine corrective action EV) photochemical catalyst.Narrow band gap may be (110) crystal face of the pattern and high exposure due to nano flower-like.In the nm light source of λ >=435 After irradiating 50 min, 10 mgL-1RhB decolourizes completely, and degradation rate constant is up to 0.1186 min-1(Catalysis Communications, 2012,23:54 ~ 57);Report relevant to the application is had no at present.
Summary of the invention
It is needed for the removing of chlorine oxygen bismuth photochemical catalyst difficulty and the degradation of the organic pollutant of the prior art efficient visible The problem of photochemical catalyst, the present invention provides a kind of preparation methods of perite nanometer piece, utilize the big of tetrabutylammonium hydroxide Ion stripping performance makes chlorine oxygen is bismuth laminated to peel away, and the absorption spectrum of chlorine oxygen bismuth photochemical catalyst is widened visible light Area passes through stirring, precipitating, separation, washing and drying steps system using bismuth salt, chloride and tetrabutylammonium hydroxide as raw material It is standby to obtain visible-light response type two dimension perite nanometer piece photochemical catalyst.
This method is easy to operate, and raw material is easy to get, is easily achieved and securely and reliably, does not need that strong acid is added;The present invention is four Chlorine oxygen bismuth through precipitation method preparation under butyl ammonium hydroxide effect is relatively not added under tetrabutylammonium hydroxide effect through precipitating legal system Standby chlorine oxygen bismuth has stronger visible light catalytic effect to degradation carbamazepine at visible light (> 420nm), while in full light Under can also degrade sulfamethoxazole and C14H10Cl2NNaO2, preferable degradation effect has all been shown to a variety of Organic substance in water.
Perite nanometer piece of the present invention the preparation method is as follows:
(1) tetrabutylammonium hydroxide is dissolved in deionized water, chloride is added after dissolution, mixed, wherein tetrabutylammonium hydrogen The molar ratio of amine-oxides and chloride is 1:(0.2 ~ 6);
(2) bismuth salt is added into the mixed solution of step (1), after being stirred 3 ~ 8h, stands 1 ~ 3h at room temperature, wherein chlorine The molar ratio of compound and bismuth salt is 1:(1 ~ 1.5);
(3) step (2) mixture is filtered, precipitating cleaned with deionized water after again with washes of absolute alcohol 1 ~ 2 time, 40 ~ 50 DEG C are drying to obtain perite nanometer piece.
The chloride is NaCl, KCl or HCl.
The bismuth salt is bismuth nitrate.
The present invention is another object is that applying perite nanometer piece made from above-mentioned preparation method in degradation Organic substance in water In.
The Organic substance in water is carbamazepine, sulfamethoxazole or C14H10Cl2NNaO2.
Perite nanometer piece of the present invention in the pending water containing organic matter in use, add perite nanometer piece, In Room temperature is protected from light lower adsorption treatment to perite nanometer piece and reaches adsorption desorption balance, then declines in visible light or/and full striation part The organic matter of desorption.
Advantages of the present invention and technical effect are as follows:
1, chlorine oxygen bismuth of the present invention through precipitation method preparation under tetrabutylammonium hydroxide effect is relatively not added with tetrabutyl hydrogen-oxygen Change the lower chlorine oxygen bismuth prepared of ammonium effect, has stronger visible light catalytic effect to carbamazepine at visible light (> 420nm), together Can also degrade sulfamethoxazole and C14H10Cl2NNaO2 under Shi Quan light (200nm ~ 780nm), all show a variety of Organic substance in water There is preferable degradation effect out;
2, catalysis material is synthesized using simple synthetic method and innocuous agents, prepares two-dimentional perite nanometer piece, it is full The environmentally protective requirement of foot;
3, preparation process under normal temperature and pressure conditions, does not require control pH, does not need that strong acid is added, easy to operate and safe, Suitable for industrialized production and marketing application, have in fields such as pollution control, new energy preparation and selective catalytic oxidations Higher application value.
Detailed description of the invention
Fig. 1 be the embodiment of the present invention 1 prepare control group chlorine oxygen bismuth photochemical catalyst BiOCl-0 and embodiment 2 prepare can The X-ray diffracting spectrum (XRD) of light-exposed response type chlorine oxygen bismuth photochemical catalyst BiOCl-1;
Fig. 2 be the embodiment of the present invention 1 prepare control group chlorine oxygen bismuth photochemical catalyst BiOCl-0 and embodiment 2 prepare can The photoelectric current I-T of light-exposed response type chlorine oxygen bismuth photochemical catalyst BiOCl-1 schemes;
Fig. 3 is scanning electron microscope (SEM) shape appearance figure;Wherein figure a is that control group prepared by the embodiment of the present invention 1 does not add four fourths The chlorine oxygen bismuth photochemical catalyst BiOCl-0 of base ammonium hydroxide;Figure b is that chlorine source prepared by embodiment 2 is sodium chloride addition tetrabutylammonium hydrogen The perite nanometer piece BiOCl-1 of amine-oxides;Figure c is the perite nanometer that chlorine source is potassium chloride addition tetrabutylammonium hydroxide Piece.
Specific embodiment
Below by attached drawing and embodiment, invention is further described in detail, but the scope of the present invention does not limit to In the content.
Embodiment 1
The present embodiment does not add tetrabutylammonium hydroxide;In deionized water by sodium chloride dissolution, bismuth nitrate is then added, After being stirred to react 6h, 1h is stood at room temperature, obtains suspension, and wherein the molar ratio of sodium chloride and bismuth nitrate is 1:1;By suspension It is filtered, filter cake is washed 2 times with dehydrated alcohol again after being cleaned with deionized water, is then dried at 40 DEG C to get chlorine oxygen bismuth Nanometer sheet;
Perite nanometer piece is used for oxidation processes carbamazepine, degradation step are as follows:
Step (1): accurately weighing the carbamazepine of 7 mg, be dissolved in distilled water, and is settled to 1000 mL, is made 7 mg·L-1Carbamazepine solution;
Step (2): accurately pipetting carbamazepine solution that 50 mL steps (1) obtain with pipette into reactor, and adds Enter 0.04 g chlorine oxygen bismuth photochemical catalyst, temperature of reaction system is controlled at 20~20.5 DEG C, be protected from light it is lower first adsorb 1 h, reach Adsorption/desorption balance;
Step (3): step (2) acquired solution is subjected to photocatalytic degradation reaction under light illumination;Through Quan Guang (200nm ~ It samples after irradiating 30min or visible light (> 420nm) irradiation 180min under 780nm), and is measured with UV-VIS spectrophotometry The absorbance of carbamazepine simultaneously calculates its conversion ratio, the results are shown in Table 1, Fig. 1,2,3a;Catalyst is under full light as can be seen from Table 1 30min is that 59.9 % have Partial digestion to the degradation rate of carbamazepine, under visible light drop of the 180min to carbamazepine Solution rate is 15.0% almost without removal;From Fig. 1,2 known to crystal face change and photoelectric current compared with the application perite nanometer piece It is weak;Control group product structure in the form of sheets is known from Fig. 3 a.
Embodiment 2
In deionized water by tetrabutylammonium hydroxide dissolution;Then sodium chloride is added to dissolve again, is eventually adding nitric acid Bismuth after being stirred 6h, stands 1h at room temperature, obtains suspension, and wherein tetrabutylammonium hydroxide and the molar ratio of sodium chloride are The molar ratio of 1:0.5, sodium chloride and bismuth nitrate is 1:1;Suspension is filtered, filter cake uses nothing after being cleaned with deionized water again Water-ethanol washs 2 times, then dries at 40 DEG C to get visible-light response type perite nanometer piece.
Perite nanometer piece is used for oxidation processes carbamazepine;Degradation step are as follows:
Step (1): accurately weighing the carbamazepine of 7 mg, be dissolved in distilled water, and is settled to 1000 mL, is made 7 mg·L-1Carbamazepine solution;
Step (2): accurately pipetting carbamazepine solution that 50 mL steps (1) obtain with pipette into reactor, and adds Enter 0.04 g chlorine oxygen bismuth photochemical catalyst, temperature of reaction system is controlled at 20~20.5 DEG C, be protected from light it is lower first adsorb 1 h, reach Adsorption/desorption balance;
Step (3): step (2) acquired solution is subjected to photocatalytic degradation reaction under light illumination.Quan Guang (200nm ~ 780nm) It is sampled after lower irradiation 30min or visible light (> 420nm) irradiation 180min, and western with UV-VIS spectrophotometry measurement Karma Flat absorbance simultaneously calculates its conversion ratio, the results are shown in Table 1, Fig. 1,2,3b;From table 1, Fig. 1, in 2 it can be seen that the present embodiment catalysis Agent is in 30min(94.8 %), 180min(44.3%) degradation rate of carbamazepine is above and does not add tetrabutylammonium hydroxide The preparation process of ammonium, diffraction maximum sharply illustrate better crystallinity degree, and crystal face changes and photoelectric current is significantly stronger;This is known from Fig. 3 b The chlorine oxygen bismuth of application structure in the form of sheets.
Embodiment 3
In deionized water by tetrabutylammonium hydroxide dissolution;Then potassium chloride is added to dissolve again, is eventually adding nitric acid Bismuth after being stirred 3h, stands 3h at room temperature and obtains suspension, wherein tetrabutylammonium hydroxide and the molar ratio of potassium chloride are 1: 2, the molar ratio of potassium chloride and bismuth nitrate is 1:1.2;Suspension is filtered, filter cake cleaned with deionized water after again with anhydrous It ethanol washing 1 time, then dries at 45 DEG C to get visible-light response type perite nanometer piece.
Perite nanometer piece is used for oxidation processes carbamazepine, degradation step are as follows:
Step (1): accurately weighing the carbamazepine of 7 mg, be dissolved in distilled water, and is settled to 1000 mL, is made 7 mg·L-1Carbamazepine solution;
Step (2): accurately pipetting carbamazepine solution that 50 mL steps (1) obtain with pipette into reactor, and adds Enter 0.04 g chlorine oxygen bismuth photochemical catalyst, temperature of reaction system is controlled at 20~20.5 DEG C, be protected from light it is lower first adsorb 1 h, reach it It is balanced to adsorption/desorption;
Step (3): step (2) acquired solution is subjected to photocatalytic degradation reaction under light illumination;Through Quan Guang (200nm ~ It samples after irradiating 30min or visible light (> 420nm) irradiation 180min under 780nm), and is measured with UV-VIS spectrophotometry The absorbance of carbamazepine simultaneously calculates its conversion ratio, the results are shown in Table 1, Fig. 3 c;The present embodiment catalyst exists as can be seen from Table 1 30min(89.6%), 180min(40.5%) degradation rate of carbamazepine is above and does not add tetrabutylammonium hydroxide Preparation process, the chlorine oxygen bismuth of the present embodiment structure in the form of sheets known to Fig. 3 c.
Embodiment 4
Compound concentration 0.067mol L-1Hydrochloric acid solution, will tetrabutylammonium hydroxide be added hydrochloric acid solution in dissolve, finally Bismuth nitrate is added, after being stirred 8h, stands 1h at room temperature and obtains suspension, wherein mole of tetrabutylammonium hydroxide and hydrochloric acid Than for 1:3, the molar ratio of hydrochloric acid and bismuth nitrate is 1:1.5;Suspension is filtered, suspension is filtered, filter cake is used It is washed 2 times with dehydrated alcohol again after deionized water cleaning, then dries at 50 DEG C and urged to get visible-light response type chlorine oxygen bismuth light Agent.
Photochemical catalyst is used for oxidation processes carbamazepine, degradation step are as follows:
Step (1): accurately weighing the carbamazepine of 7 mg, be dissolved in distilled water, and is settled to 1000 mL, is made 7 mg·L-1Carbamazepine solution;
Step (2): accurately pipetting carbamazepine solution that 50 mL steps (1) obtain with pipette into reactor, and adds Enter 0.04 g chlorine oxygen bismuth photochemical catalyst, temperature of reaction system is controlled at 20~20.5 DEG C, be protected from light it is lower first adsorb 1 h, reach Adsorption/desorption balance;
Step (3): step (2) acquired solution is subjected to photocatalytic degradation reaction under light illumination;Through Quan Guang (200nm ~ It samples after irradiating 30min or visible light (> 420nm) irradiation 180min under 780nm), and is measured with ultraviolet-visible spectrophotometry The absorbance of carbamazepine simultaneously calculates its conversion ratio, the results are shown in Table 1;The present embodiment catalyst is as can be seen from the table 30min(92.7%), 180min(30.8%) system for not adding tetrabutylammonium hydroxide is above to the degradation rate of carbamazepine Standby technique.
Embodiment 5
The present embodiment does not add tetrabutylammonium hydroxide, in deionized water by sodium chloride dissolution, bismuth nitrate is then added, After being stirred to react 5h, 2h is stood at room temperature, obtains suspension, and wherein the molar ratio of sodium chloride and bismuth nitrate is 1:1;By suspension It is filtered, filter cake is washed 2 times with dehydrated alcohol again after being cleaned with deionized water, is then dried at 40 DEG C to get chlorine oxygen bismuth Nanometer sheet;
Perite nanometer piece is used for oxidation processes sulfamethoxazole;Degradation step are as follows:
Step (1): accurately weighing the sulfamethoxazole of 7 mg, be dissolved in distilled water, and is settled to 1000 mL, system Obtain 7 mgL-1Sulfamethoxazole solution;
Step (2): accurately pipetting sulfamethoxazole solution that 50 mL steps (1) obtain with pipette into reactor, and Be added 0.04 g chlorine oxygen bismuth photochemical catalyst, temperature of reaction system is controlled at 20~20.5 DEG C, be protected from light it is lower first adsorb 1 h, reach it It is balanced to adsorption/desorption;
Step (3): step (2) acquired solution is subjected to photocatalytic degradation reaction under light illumination;Through Quan Guang (200nm ~ It is sampled after irradiating 30min under 780nm), and with the absorbance of UV-VIS spectrophotometry measurement sulfamethoxazole and calculates it Conversion ratio the results are shown in Table 1, and the present embodiment catalyst is in degradation rate of the 30min to sulfamethoxazole as can be seen from the table 59.4%。
Embodiment 6
In deionized water by tetrabutylammonium hydroxide dissolution;Then sodium chloride is added to dissolve again, is eventually adding nitric acid Bismuth after being stirred 6h, stands 1h at room temperature, obtains suspension, and wherein tetrabutylammonium hydroxide and the molar ratio of sodium chloride are The molar ratio of 1:0.5, sodium chloride and bismuth nitrate is 1:1;Suspension is filtered, filter cake uses nothing after being cleaned with deionized water again Water-ethanol washs 2 times, then dries at 40 DEG C to get perite nanometer piece.
Perite nanometer piece is used for oxidation processes sulfamethoxazole, degradation step are as follows:
Step (1): accurately weighing the sulfamethoxazole of 7 mg, be dissolved in distilled water, and is settled to 1000 mL, system Obtain 7 mgL-1Sulfamethoxazole solution;
Step (2): accurately pipetting sulfamethoxazole solution that 50 mL steps (1) obtain with pipette into reactor, and Be added 0.04 g chlorine oxygen bismuth photochemical catalyst, temperature of reaction system is controlled at 20~20.5 DEG C, be protected from light it is lower first adsorb 1 h, reach it It is balanced to adsorption/desorption;
Step (3): step (2) acquired solution is subjected to photocatalytic degradation reaction under light illumination.Through Quan Guang (200nm ~ It is sampled after irradiating 30min under 780nm), and with the absorbance of UV-VIS spectrophotometry measurement sulfamethoxazole and calculates it Conversion ratio the results are shown in Table 1, and the present embodiment catalyst is in 30min(68.0% as can be seen from the table) to the drop of sulfamethoxazole Solution rate is higher than the preparation process (59.4%) that embodiment 5 does not add tetrabutylammonium hydroxide.
Embodiment 7
The preparation process of the present embodiment perite nanometer piece is with embodiment 6, while tetrabutylammonium hydroxide is not added in setting Control, method is the same as embodiment 5;
Perite nanometer piece is used for oxidation processes C14H10Cl2NNaO2, degradation step are as follows:
Step (1): accurately weighing the C14H10Cl2NNaO2 of 7 mg, be dissolved in distilled water, and is settled to 1000 mL, system Obtain 7 mgL-1Diclofenac sodium solution;
Step (2): accurately pipetting Diclofenac sodium solution that 50 mL steps (1) obtain with pipette into reactor, and Be added 0.04 g chlorine oxygen bismuth photochemical catalyst, temperature of reaction system is controlled at 20~20.5 DEG C, be protected from light it is lower first adsorb 1 h, make it Reach adsorption/desorption balance;
Step (3): step (2) acquired solution is subjected to photocatalytic degradation reaction under light illumination.Through Quan Guang (200nm ~ It is sampled after irradiating 30min under 780nm), and with the absorbance of UV-VIS spectrophotometry measurement C14H10Cl2NNaO2 and calculates it Conversion ratio the results are shown in Table 1, and the present embodiment catalyst is in 30min(88.3% as can be seen from the table) to the drop of C14H10Cl2NNaO2 Solution rate is higher than the preparation process (78.5%) for not adding tetrabutylammonium hydroxide.
Table 1: the degradation of the 180min under 30min and visible light under full light of perite nanometer piece made from distinct methods As a result

Claims (3)

1. a kind of preparation method of perite nanometer piece, which comprises the following steps:
(1) tetrabutylammonium hydroxide is dissolved in deionized water, chloride is added after dissolution, mixed, wherein tetrabutylammonium hydroxide The molar ratio of ammonium and chloride is 1:(0.2 ~ 6);
(2) bismuth salt is added into the mixed solution of step (1), after being stirred 3 ~ 8h, stands 1 ~ 3h at room temperature, wherein chloride Molar ratio with bismuth salt is 1:(1 ~ 1.5);
(3) step (2) mixture is filtered, precipitating is used washes of absolute alcohol 1 ~ 2 time, 40 ~ 50 DEG C again after being cleaned with deionized water It is drying to obtain perite nanometer piece.
2. the preparation method of perite nanometer piece according to claim 1, it is characterised in that: chloride is NaCl or KCl.
3. the preparation method of perite nanometer piece according to claim 1, it is characterised in that: bismuth salt is bismuth nitrate.
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多级结构BiOCl的可控制备及对药物废水的有效降解;赵晓霞等;《高等学校化学学报》;20150531;第36卷(第5期);956-958 *

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