CN110508320A - BiO(HCOO)xIyBr1-x-yThe solid-phase grinding preparation method of mischcrystal photocatalyst - Google Patents

BiO(HCOO)xIyBr1-x-yThe solid-phase grinding preparation method of mischcrystal photocatalyst Download PDF

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Publication number
CN110508320A
CN110508320A CN201910780478.3A CN201910780478A CN110508320A CN 110508320 A CN110508320 A CN 110508320A CN 201910780478 A CN201910780478 A CN 201910780478A CN 110508320 A CN110508320 A CN 110508320A
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Prior art keywords
hcoo
bio
solid solution
solid
sheet
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韩巧凤
彭茂媛
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Nanjing Tech University
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Nanjing Tech University
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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
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/02Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides
    • B01J31/04Catalysts comprising hydrides, coordination complexes or organic compounds containing organic compounds or metal hydrides containing carboxylic acids or their salts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J31/00Catalysts comprising hydrides, coordination complexes or organic compounds
    • B01J31/26Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/30Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39Photocatalytic properties
    • 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
    • B01J37/04Mixing

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Catalysts (AREA)

Abstract

The present invention relates to a kind of Room Temperature Solid State polishings to prepare the bromo- iodo- formic acid oxygen bismuth solid solution BiO (HCOO) of sheetxIyBr1‑x‑yThe bromo- iodo- formic acid oxygen bismuth solid solution of sheet is prepared especially with simple solid-phase sequencing in the method and its performance study of photochemical catalyst.The preparation method of the sample is the following steps are included: five water bismuth nitrates and sodium formate powder are placed in mortar, it is ground under room temperature and is directly added into potassium bromide grinding after a certain period of time, it adds potassium iodide to continue to grind certain time, the bromo- iodo- formic acid oxygen bismuth solid solution of sheet can be obtained in washing drying after reaction.Solid solution has very good effect when degrading simulating pollution object rhodamine B (RhB), shows that it has a good application prospect in terms of environmental pollution improvement.

Description

BiO(HCOO)xIyBr1-x-yThe solid-phase grinding preparation method of mischcrystal photocatalyst
Technical field
The invention belongs to field of inorganic nano-material preparation, are a kind of BiO (HCOO) specificallyxIyBr1-x-ySolid solution The solid-phase grinding preparation method of photochemical catalyst.
Background technique
Today's society is faced with two hang-up of energy shortage and environmental pollution, and semiconductor light-catalyst solves energy because it has Great potential on source and environmental problem and cause extensive research interest.So far, various semiconductor materials are designed At photochemical catalyst, including metal oxide, sulfide, nitride and its compound.Wherein the oxide of bismuth has [Bi2O2]2+ Layer structure, such as Bi2O3, BiOX (X=Cl, Br, I), BiVO4,Bi2WO6,Bi4Ti3O12,BiPO4,Bi2O2CO3, BiOHCOO etc..The internal electric field that this unique layer structure is formed is conducive to the separation in light induced electron and hole, to improve Its photocatalysis effect.
However the biggish forbidden bandwidth of BiOHCOO is about 3.30eV (Xiong, Cheng, et al.BiOCOOH hierarchical nanostructures:Shape-controlled solvothermal synthesis and Photocatalytic degradation performances [J] .CrystEngComm, 2011,13,2381) make it can only Photocatalytic activity is shown under the excitation of ultraviolet light, and ultraviolet light accounts for about the 5% of sunlight.Therefore expand the light of BiOHCOO Absorption region is particularly important.Up to the present, people have developed many methods to expand the light of wide band gap semiconducter Response range, including construction heterojunction structure, metal and nonmetal doping and codope, noble metal loading, crystal face design, Construct solid solution etc..Wherein, the formation of solid solution can continuously adjust band structure, to inhale in redox ability and light Reach optimum balance between receipts, photocatalytic activity is made to reach maximum.
Summary of the invention
It is an object of the invention to overcome the shortage of prior art, a kind of BiO (HCOO) is providedxIyBr1-x-ySolid solution light is urged The solid-phase grinding preparation method of agent.
The technical solution for realizing the aim of the invention is as follows: at room temperature by sequentially adding five water nitric acid of slightly water-soluble Bismuth, water-soluble sodium formate, potassium iodide, potassium bromide raw material are ground in mortar, and solid-phase grinding prepares the good BiO of crystallinity (HCOO)xIyBr1-x-yMischcrystal photocatalyst, to realize the purpose of the present invention, comprising the following steps:
Step 1: by Bi (NO3)3·5H2O and HCOONa mixed grinding certain time;
Step 2: KI being added in step 1 products therefrom, KBr continues to grind certain time;
Step 3: up to sheet BiO (HCOO) after washing is dry after reactionxIyBr1-x-yMischcrystal photocatalyst.
Milling time described in step 1 is 1h;
Grinding temperature described in step 1 is room temperature;
Described in step 2 plus sampfe order is first potassium iodide, rear potassium bromide;
Described in step 2 plus potassium iodide milling time is 1h, and adding potassium bromide milling time is 1h, and grinding temperature is room temperature;
Step 1 and 2 described plus Bi (NO3)3·5H2The molar ratio of O, HCOONa, KBr, KI are 1:5:0.2:0.2 to 1:5: 0.4:0.4。
Mode of washing described in step 3 is washing 3 times, and ethyl alcohol is washed 1 time;
Drying temperature described in step 3 is room temperature;
Preferred plan of the present invention are as follows:
Step 1: by Bi (NO3)3·5H2O and HCOONa mixed grinding 1.0h;
Step 2: sequentially adding 0.3mmolKI grinding 1.0h in step 1 products therefrom, add 0.3mmolKBr
Continue to grind;
Step 3: washed after reaction up to sheet BiO (HCOO)0.4I0.3Br0.3Mischcrystal photocatalyst.
The present invention has following remarkable advantage:
1, this method is simple, and experimental period is short, saves the time, and yield is high.It is not necessary that any template is added, five water are used only Bismuth nitrate, sodium formate, potassium bromide, potassium iodide raw material have obtained BiO (HCOO)xIyBr1-x-ySolid solution;
2, the BiO (HCOO) obtained by the present inventionxIyBr1-x-yFor sheet;
3, this it is nanocrystalline excellent visible light photocatalytic degradation performance is shown to rhodamine B (RhB), in industrial wastewater treatment Field has good application.
Detailed description of the invention
Fig. 1 is present invention preparation sheet BiO (HCOO)xIyBr1-x-yThe flow diagram of solid solution.
Fig. 2 is embodiment 1BiO (HCOO)0.4I0.3Br0.3The nanocrystalline transmission electron microscope picture of gained.
Fig. 3 is 1 gained sample XRD spectra of embodiment.
Fig. 4 is 1 gained sample XRD spectra of comparative example.
Fig. 5 is 2 gained sample XRD spectra of comparative example.
Fig. 6 is the rhodamine B degradation figure of 20mg/L of degrading under visible light to the sample of embodiment 1-3 and comparative example 1-3.
Specific embodiment
Invention is further described in detail with reference to the accompanying drawings and detailed description.
In conjunction with Fig. 1, the present invention has the BiO (HCOO) of unique morphology using polishing preparationxIyBr1-x-yThe side of catalyst Method, feature the following steps are included:
Step 1: by Bi (NO3)3·5H2O and HCOONa mixed grinding certain time;
Step 2: KI will be added in step 1 products therefrom, KBr continues to grind;
Step 3: washed after reaction up to sheet BiO (HCOO)xIyBr1-x-yMischcrystal photocatalyst.
Below with reference to embodiment, comparative example, the present invention will be further described in detail for attached drawing:
Embodiment 1
Step 1: by Bi (NO3)3·5H2O and HCOONa mixed grinding 1.0h;
Step 2: sequentially adding 0.3mmolKI grinding 1.0h in step 1 products therefrom, add 0.3mmolKBr
Continue to grind 1.0h;
Step 3: washing is drying to obtain sheet BiO (HCOO) after reaction0.4I0.3Br0.3Mischcrystal photocatalyst.
Products therefrom transmission electron microscope picture has slight reunion as shown in Fig. 2, for ultrathin nanometer sheet.Fig. 3 is its XRD spectrum Figure, spectrogram show that product crystallinity is preferable.Fig. 6 shows its degradation effect to 20mg/L rhodamine B, degrades 90% in 30min, 120min is degradable.
Embodiment 2
Step 1: with embodiment 1;
Step 2: with embodiment 1, other conditions are constant, only change KI, and KBr obtains additional amount, becomes 0.2mmol;
Step 3: washing is drying to obtain sheet BiO (HCOO) after reaction0.6I0.2Br0.2Mischcrystal photocatalyst
Products therefrom photocatalysis effect is as shown in fig. 6, have visible light activity, degradation rate to the rhodamine B of 20mg/L are as follows: 30min degrades 80%, 120min degradation completely.
Embodiment 3
Step 1: with embodiment 1;
Step 2: with embodiment 1, other conditions are constant, only change KI, and KBr obtains additional amount, becomes 0.4mmol;
Step 3: washed after reaction up to sheet BiO (HCOO)0.2I0.4Br0.4Mischcrystal photocatalyst
Products therefrom photocatalysis effect is as shown in fig. 6, be remarkably reinforced the absorption of 20mg/L rhodamine B, when adsorption equilibrium, Adsorbance reaches 90%.Photocatalysis effect is shown simultaneously, but effect is not significant.
Comparative example 1
Step 1: by 1mmol Bi (NO3)3·5H2O and 5mmol HCOONa, which is placed in mortar, grinds 1.0h;
Step 2: washing after reaction nanocrystalline up to BiOHCOO.
Products therefrom XRD spectra as shown in figure 5, product is degraded under visible light 20mg/L rhodamine B as shown in fig. 6, light It is 14% according to 120min degradation rate.
Comparative example 2
Step 1: by 1mmol Bi (NO3)3·5H2O and 5mmol HCOONa, which is placed in mortar, grinds 1.0h;
Step 2: 0.3mmol KI grinding 1.0h is added in the product that step 1 is obtained;
Step 3: washing, drying to obtain BiO (HCOO) after reaction0.7I0.3Solid solution
Product degrades 20mg/L rhodamine B as shown in fig. 6, degradation rate is 60% after illumination 120min under visible light.
Comparative example 3
Step 1: by 1mmol Bi (NO3)3·5H2O and 5mmol HCOONa, which is placed in mortar, grinds 1.0h;
Step 2: 0.3mmol KBr grinding 1.0h is added in the product that step 1 is obtained;
Step 3: washing, drying to obtain BiO (HCOO) after reaction0.7Br0.3Solid solution.
Products therefrom XRD spectra as shown in figure 5, product is degraded under visible light 20mg/L rhodamine B as shown in fig. 6, light It is 30% according to degradation rate after 120min.

Claims (7)

1. a kind of BiO (HCOO)xIyBr1-x-yThe solid-phase grinding preparation method of mischcrystal photocatalyst, it is characterised in that: the light Catalyst is prepared using following steps:
Step 1: by Bi (NO3)3·5H2O and HCOONa mixed grinding;
Step 2: KI will be added in step 1 products therefrom, KBr continues to grind;
Step 3: washing is drying to obtain sheet BiO (HCOO) after reactionxIyBr1-x-yMischcrystal photocatalyst.
2. according to the method described in claim 1, it is characterized by: the raw material Bi (NO3)3·5H2O, HCOONa, KBr with The molar ratio of KI is 1:5:0.3:0.3.
3. according to the method described in claim 1, it is characterized by: the milling time of the step 1 is 1h.
4. according to the method described in claim 1, it is characterized by: the addition KI, KBr be first be added KBr grinding 1h, then KI is added and grinds 1h.
5. according to the method described in claim 1, it is characterized by: the mixed grinding is that raw material is placed in room temperature in mortar Lower solid-phase grinding.
6. according to the method described in claim 1, it is characterized by: the washing is to make to be washed with deionized 3 times, ethyl alcohol It washes primary.
7. according to the method described in claim 1, it is characterized by: the drying temperature is room temperature.
CN201910780478.3A 2019-08-22 2019-08-22 BiO(HCOO)xIyBr1-x-yThe solid-phase grinding preparation method of mischcrystal photocatalyst Pending CN110508320A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060027688A1 (en) * 2004-08-09 2006-02-09 Kim Jin D Grinding method and product
CN105236480A (en) * 2014-07-03 2016-01-13 南京理工大学 HCOOBiO nanocrystalline with unique morphology and preparation method therefor
CN107497457A (en) * 2017-06-12 2017-12-22 南阳师范学院 A kind of Bi3O4Cl0.5Br0.5Mischcrystal photocatalyst and its preparation and application
CN108786895A (en) * 2018-07-06 2018-11-13 兰州大学 BiOCOOH/g-C3N4Composite photo-catalyst and its preparation method and application
CN109364958A (en) * 2018-12-11 2019-02-22 江南大学 A kind of Bi4O5BrxI2-xThe preparation method of mischcrystal photocatalyst

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060027688A1 (en) * 2004-08-09 2006-02-09 Kim Jin D Grinding method and product
CN105236480A (en) * 2014-07-03 2016-01-13 南京理工大学 HCOOBiO nanocrystalline with unique morphology and preparation method therefor
CN107497457A (en) * 2017-06-12 2017-12-22 南阳师范学院 A kind of Bi3O4Cl0.5Br0.5Mischcrystal photocatalyst and its preparation and application
CN108786895A (en) * 2018-07-06 2018-11-13 兰州大学 BiOCOOH/g-C3N4Composite photo-catalyst and its preparation method and application
CN109364958A (en) * 2018-12-11 2019-02-22 江南大学 A kind of Bi4O5BrxI2-xThe preparation method of mischcrystal photocatalyst

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
MAOYUAN PENG等: "One-pot grinding method to BiO(HCOO)xI1-x solid solution with enhanced visible-light photocatalytic activity", 《JOURNAL OF COLLOID AND INTERFACE SCIENCE》 *

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Application publication date: 20191129