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Composite photocatalyst Bi2O3/g-C3N4 as well as preparation method and application of composite photocatalyst

A technology of g-c3n4 and composite light, which is applied in the chemical field, can solve the problems of no degradation of pollutants and poor degradation of NO, and achieve the effect of improving the utilization rate

Inactive Publication Date: 2015-05-13
FUYANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, for C 3 N 4 This modification is only to C 3 N 4 Doped with inorganic ions, the obtained photocatalyst can only degrade NO in the presence of ultraviolet light, but has a poor degradation effect on NO in the presence of visible light.
Moreover, the patent does not involve the degradation of pollutants in wastewater

Method used

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  • Composite photocatalyst Bi2O3/g-C3N4 as well as preparation method and application of composite photocatalyst
  • Composite photocatalyst Bi2O3/g-C3N4 as well as preparation method and application of composite photocatalyst
  • Composite photocatalyst Bi2O3/g-C3N4 as well as preparation method and application of composite photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0076] Weigh 5.0 g of thiourea, place it in a clean porcelain crucible, cover it, and calcinate it in a muffle furnace at 450 °C for 2 h to obtain g-C 3 N 4 Sample (No. 1), its XRD spectrum is as figure 1 Shown in a.

Embodiment 2

[0078] Weigh 5.0 g of urea, place it in a clean porcelain crucible, cover it, and calcinate it in a muffle furnace at 450 °C for 2 hours to obtain g-C 3 N 4 Sample (No. 2), its XRD spectrum is as figure 1 Shown in b.

Embodiment 3

[0080] Weigh 5.0 g of dicyandiamide, place it in a clean porcelain crucible, cover it, and calcinate it in a muffle furnace at 450°C for 2 hours to obtain g-C 3 N 4 Sample (No. 3), its XRD spectrum is asfigure 1 As shown in c.

[0081] figure 1 The g-C that above embodiment 1-3 makes is given 3 N 4 It can be seen from the figure that the catalyst sample presents a crystalline phase structure after calcination, and the two XRD diffraction peaks near 18.2° and 27.3° are respectively assigned to g-C 3 N 4 The crystal plane diffraction peaks of (100) and (002) in the structure are the identification of g-C 3 N 4 characteristic diffraction peaks. The g-C prepared by using dicyandiamine, thiourea, and urea as precursors respectively 3 N 4 The structure is consistent. figure 1 It is also shown that g-C prepared by thiourea calcined at 450 °C for 2 3 N 4 The stronger X-ray diffraction peaks indicated that thiourea was used as a precursor to synthesize photocatalysts with b...

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Abstract

The invention discloses a preparation method for a composite photocatalyst Bi2O3 / g-C3N4. The preparation method comprises the following steps: preparing g-C3N4, namely calcining a carbon and nitrogen source at the temperature of 400-1000 DEG C to prepare g-C3N4; mixing Bi2O3 solid with the g-C3N4 prepared in step 1, and grinding; calcining the grinded mixture at the temperature of 400-1000 DEG C to prepare the composite photocatalyst Bi2O3 / g-C3N4. The invention further discloses application of the composite photocatalyst Bi2O3 / g-C3N4 prepared by the method in sewage treatment, in particular, in the aspect of dye sewage.

Description

technical field [0001] The invention relates to the field of chemistry, in particular to a preparation method and application of a photocatalyst for treating waste water pollution. Background technique [0002] In recent years, with the rapid development of industrial production, the problems of energy and environmental pollution have been widely concerned by people. With the continuous improvement of industrial pollution control technology, photocatalytic technology, that is, the use of solar energy to photocatalytically degrade pollutants, has been studied more and more deeply in environmental governance. Under the irradiation of light, semiconductor materials can convert light energy into chemical energy, thereby promoting the formation or degradation of compounds, which is photocatalytic technology. [0003] As a "green" technology, photocatalytic technology has many advantages incomparable with traditional water pollution treatment technologies in terms of water pollut...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30
CPCY02W10/37
Inventor 崔玉民李慧泉苗慧陶栋梁
Owner FUYANG NORMAL UNIVERSITY
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