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Three-dimensional ordered macroporous (3DOM) BiVO4 loaded AgBr and Pd photocatalyst, preparation and application

A three-dimensional ordered, nano-photocatalyst technology, used in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., to achieve good application prospects and high-efficiency visible light catalytic activity.

Inactive Publication Date: 2014-10-29
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, no literature or patent has reported BiVO with a three-phase composite structure with 3DOM structure, heterojunction, gradient structure surface and plasmon resonance effect at the same time. 4 Supported AgBr and Pd Photocatalyst with Plasmon Resonance Effect

Method used

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  • Three-dimensional ordered macroporous (3DOM) BiVO4 loaded AgBr and Pd photocatalyst, preparation and application
  • Three-dimensional ordered macroporous (3DOM) BiVO4 loaded AgBr and Pd photocatalyst, preparation and application
  • Three-dimensional ordered macroporous (3DOM) BiVO4 loaded AgBr and Pd photocatalyst, preparation and application

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Example 1: (1) Weigh 0.0714g KBr and dissolve it in 246mL deionized water, and dissolve 1.0g3DOM BiVO 4 The carrier was immersed in it, and bubbled in the dark for 2 h under the condition of an ice-water bath, and then 53.3 mL of AgNO with a concentration of 0.01 mol / L was added to it with a constant pressure dropping funnel. 3 The solution (containing the protective agent polyvinylpyrrolidone PVP, the mass ratio of Ag to PVP is 1 / 1.5) was slowly dripped into the above system (the completion time of dripping was about 1h), continued bubbling for 5h and then filtered to obtain a solid precursor. The precursor was dried at 80°C, then placed in an oven at 200°C for 2 hours, washed with deionized water and dried at 80°C to obtain AgBr / 3DOM BiVO 4 ; (2) with PdCl 2 As a precious metal source, polyvinyl alcohol (PVA, 10000g / mol; the molar ratio of Pd to PVA is 1.5 / 1) is used as a protective agent, and Pd is configured 2+ Concentration is the solution of 0.01mol / L; (3) under...

Embodiment 2

[0020] Embodiment 2: 0.05g Pd / AgBr / 3DOM BiVO 4 catalyst sample and 0.6 mL of 30 wt% H 2 o 2 The solution was added to 99.4 mL of an aqueous solution of p-chlorophenol with an initial concentration of 15 mg / L, and then the reaction solution was sonicated in the dark for 0.5 h and then magnetically stirred for 1 h. After the reaction started, take 5mL of the suspension at regular intervals, remove the photocatalyst particles by centrifugation, measure the absorbance of the solution after a certain time (t) of reaction with a UV-Vis instrument and use electrospray ionization mass spectrometry (ESI-MS) To detect residual organic matter in the reaction solution. Figure 4 with Figure 5 It shows that the degradation of p-chlorophenol in the solution is basically completed after 150min of visible light irradiation.

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Abstract

The invention discloses a three-dimensional ordered macroporous (3DOM) BiVO4 loaded AgBr and Pd photocatalyst, preparation and application, belonging to the technical field of visible light response catalysts. A novel 3DOM BiVO4 loaded AgBr substance and Pd efficient visible light response nano hybridization photocatalyst is prepared by taking a 3DOM BiVO4 photocatalysis material as a carrier, adopting a PMMA microsphere hard template method, a low-temperature deposition-sedimentation method and a bubbling reduction method. The catalyst has a 3DOM structure, heterojunction and gradient structure surface as well as plasma resonance effect; AgBr is uniformly spread on the surface of a BiVO4 carrier; Pd is attached to the surface of the 3DOM structure in a nanocluster mode, and the specific surface area is 16m<2> / g, and the band gap energy is 2.49eV; the catalyst shows efficient visible light catalytic activity to degradation of parachlorophenol under the irradiation of visible light, and 4-CP is basically degraded completely after 150 minutes.

Description

technical field [0001] The invention relates to three-dimensional ordered macroporous BiVO 4 Loaded AgBr and Pd photocatalysts and applications, specifically related to BiVO with a three-phase composite structure with three-dimensional ordered macroporous structure, heterojunction, gradient structure surface and plasmon resonance effect 4 The invention relates to a photocatalyst loaded with AgBr and Pd precious metals and its application in degrading organic pollutants such as phenols, belonging to the technical field of visible light response catalysts. Background technique [0002] Phenolic compounds are hydroxyl-containing derivatives of aromatic hydrocarbons, have an aromatic smell, are weakly acidic, and are easily oxidized in the environment. Phenol is a moderately potent poison. Phenol pollution in the environment mainly refers to the pollution of phenolic compounds. Phenol-containing wastewater is one of industrial wastewater and an important source of water pollut...

Claims

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Application Information

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IPC IPC(8): B01J27/13B01J35/10C02F1/30C02F101/34
CPCY02W10/37
Inventor 戴洪兴吉科猛邓积光
Owner BEIJING UNIV OF TECH
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