Preparation method and application of a kind of ternary composite photocatalyst

A ternary composite, photocatalyst technology, applied in the field of photocatalysis, can solve the problem of low photocatalytic performance, and achieve the effects of large specific surface area, enhanced photocatalytic performance, and high yield

Active Publication Date: 2022-01-11
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The object of the present invention is aimed at cubic phase CaIn 2 S 4 To solve the problem of low photocatalytic performance, provide a method based on cubic phase CaIn 2 S 4 The preparation method of the ternary composite photocatalyst and its application in the field of photocatalysis

Method used

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  • Preparation method and application of a kind of ternary composite photocatalyst
  • Preparation method and application of a kind of ternary composite photocatalyst
  • Preparation method and application of a kind of ternary composite photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Weigh 0.05 g of GO powder, add it into a beaker containing 100 ml of deionized water, and sonicate for 1 hour, so that the GO powder is uniformly and stably dispersed in the deionized water.

[0036] Add 1 g of CaIn to the above suspension 2 S 4 powder and 800 µl silver nitrate AgNO 3 aqueous solution (concentration of 40 g / L), then place the beaker in a 70-degree water-bath stirrer, and stir for 6 hours. After the reaction, filter, wash and dry.

[0037] The above dried powder was annealed in a nitrogen tube furnace at 200 °C for 2 hours to obtain Ag-RGO-CaIn 2 S 4 Composite photocatalyst, in which the content of Ag is 2 wt%, and the content of RGO is 5 wt%.

[0038] to Ag-RGO-CaIn 2 S 4 The crystal structure of the X-ray diffraction test, combined with CaIn 2 S 4 , RGO-CaIn 2 S 4 and Ag-CaIn 2 S 4 For comparison, its structure is as follows figure 1 shown. figure 1 Among them, A is cubic phase CaIn 2 S 4 The X-ray diffraction spectrum, B is RGO-CaIn ...

Embodiment 2

[0042] Weigh 0.01 g of GO powder, add it into a beaker containing 120 ml of deionized water, and ultrasonicate for 45 minutes, so that the GO powder is evenly and stably dispersed in the deionized water.

[0043] Add 1 g of CaIn to the above suspension 2 S 4 powder and 216 µl of chloroauric acid HAuCl 4 aqueous solution (concentration of 40 g / L), then place the beaker in an 80-degree water bath stirrer, and stir for 5 hours. After the reaction, filter, wash and dry.

[0044] The above dried powder was annealed in an argon tube furnace at 150°C for 3 hours to obtain Au-RGO-CaIn 2 S 4 Composite photocatalyst, in which the content of Au is 0.5 wt%, and the content of RGO is 1 wt%.

[0045] For the obtained Au-RGO-CaIn 2 S 4 The microstructure of the composite photocatalyst was analyzed by transmission electron microscopy, and the results were as follows: image 3 shown. Cubic phase CaIn 2 S 4 It has a flaky structure, and the reduced graphene oxide RGO has a two-dimens...

Embodiment 3

[0050] Weigh 0.05 g of GO powder, add it into a beaker containing 80 ml of deionized water, and ultrasonicate for 30 minutes, so that the GO powder is uniformly and stably dispersed in the deionized water.

[0051] Add 0.5 g of CaIn to the above suspension 2 S 4 powder and 1.84 ml copper nitrate Cu(NO 3 ) 2 aqueous solution (concentration of 40 g / L), then place the beaker in a water bath stirrer at 100 degrees, and stir for 4 hours. After the reaction, filter, wash and dry.

[0052] The above dried powder was annealed in a helium tube furnace at 250 °C for 1.5 hours to obtain Cu-RGO-CaIn 2 S 4 Composite photocatalyst, in which the content of Cu is 5 wt%, and the content of RGO is 10 wt%.

[0053] Photocatalytic degradation of toluene was used to evaluate the performance of the above photocatalysts in photocatalytic degradation of organic pollutants. The light source is a 300-watt xenon lamp (Beijing Pofilai Technology Co., Ltd., PLS-SXE300 type, the actual output power ...

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Abstract

The invention discloses a preparation method and application of a ternary composite photocatalyst. The preparation method is to load metal M and reduced graphene oxide RGO on CaIn through a low-temperature thermal reduction method 2 S 4 cubic phase, followed by low-temperature thermal annealing to obtain M‑RGO‑CaIn 2 S 4 composite photocatalyst. The synergistic loading of metal M and reduced graphene oxide RGO can not only increase the specific surface area of ​​the composite photocatalyst, reduce the activation energy of the photocatalytic reaction, but also effectively promote the separation of photogenerated carriers, thus significantly enhancing the cubic CaIn 2 S 4 photocatalytic performance. The preparation method provided by the invention has simple process, mild reaction conditions and high yield. The preparation process involved in the present invention is simple, the reaction conditions are mild, the yield is high, and it can be prepared macroscopically. It is an environmentally friendly preparation method. The obtained M-RGO-CaIn 2 S 4 Composite photocatalysts exhibit good photocatalytic performance under visible light, and are a new type of composite photocatalytic material system with potential application value.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a preparation method and application of a ternary composite photocatalyst. Background technique [0002] Since Fujishima and Honda discovered the photolysis of water on n-type semiconductor TiO2 single crystal electrodes in 1972, photocatalytic reactions have received widespread attention in environmental governance and energy development. It can convert low-density solar energy into high-density chemical energy and electrical energy. At the same time, it can directly use low-density solar energy to split water to produce hydrogen, degrade and mineralize various organic pollutants in water and air, and even reduce heavy metal ions. This technology has the advantages of reaction at room temperature, direct use of solar energy, and no secondary pollution. It has immeasurable significance for fundamentally solving the problems of environmental pollution and energy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/04B01J27/043B01J37/16B01J35/10C02F1/30B01D53/86B01D53/44C01B3/04
CPCB01D53/8687C01B3/042C02F1/30B01J27/04B01J27/043B01J35/004B01J35/10B01J35/1004B01J37/16B01D2257/708C01B2203/0277C01B2203/1076C01B2203/1041C02F2101/308C02F2305/10Y02E60/36
Inventor 丁建军陈林田兴友
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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