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Method and application for synthesizing ternary photocatalytic composite material by using hydrothermal method

A composite material and photocatalytic technology, applied in the field of synthesis of ternary photocatalytic composite materials, can solve the problems of low degradation efficiency of methylene blue, and achieve the effects of improving photon quantum efficiency, improving activity, and strong redox ability.

Inactive Publication Date: 2019-10-29
HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of low degradation efficiency of existing photocatalysts for the degradation of methylene blue under the condition of low energy consumption of visible light, and to provide a method and application of a ternary photocatalytic composite material synthesized by a hydrothermal method

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  • Method and application for synthesizing ternary photocatalytic composite material by using hydrothermal method
  • Method and application for synthesizing ternary photocatalytic composite material by using hydrothermal method
  • Method and application for synthesizing ternary photocatalytic composite material by using hydrothermal method

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specific Embodiment approach 1

[0033] Specific Embodiment 1: This embodiment is a method for synthesizing a ternary photocatalytic composite material by a hydrothermal method, and the ternary photocatalytic composite material is N-TiO 2 / BiOI / RGO photocatalyst, the specific steps are as follows:

[0034] 1. Synthesis of N-TiO 2 : 1. adding tetrabutyl titanate to absolute ethanol to obtain tetrabutyl titanate-ethanol solution; the volume ratio of tetrabutyl titanate to absolute ethanol is 8:40~50; 2. Dissolve urea in dehydrated ethanol, then add a mass fraction of 36% to 38% hydrochloric acid solution and deionized water to obtain urea-hydrochloric acid-ethanol aqueous solution; the ratio of the mass of urea to the volume of dehydrated ethanol is 0.7g: (40~50) mL; The mass fraction is 1.5:40~50 of the volume ratio of 36%~38% hydrochloric acid and dehydrated alcohol; The volume ratio of described deionized water and dehydrated alcohol 3:40~50 ; ③, adding urea-hydrochloric acid-ethanol aqueous solution dropw...

specific Embodiment approach 2

[0037] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is: the specific operation of the hydrothermal reaction in step 1 ④ is as follows: react at a temperature of 160-180°C for 12h-24h. Others are the same as the first embodiment.

specific Embodiment approach 3

[0038] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the specific parameters of the calcination in Step 1 ⑤ are as follows: the calcination temperature is 450-550°C, and the calcination time is 2h-3h. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a method and application for synthesizing a ternary photocatalytic composite material by using a hydrothermal method, and relates to a synthetic method and application of theternary photocatalytic composite material. The method aims to solve the problem of low degradation efficiency of existing photocatalysts for degrading methylene blue under the conditions of visible light and low energy consumption. The method includes the steps that first, N-TiO2 is synthesized; and second, hydro-thermal synthesis is conducted, specifically, an N-TiO2 / BiOI / RGO photocatalyst is obtained, wherein the N-TiO2 / BiOI / RGO photocatalyst is used for degrading the methylene blue. The method has the advantage that the degradation rate of the methylene blue is greater than 99%. The methodis mainly used for synthesizing the N-TiO2 / BiOI / RGO photocatalyst.

Description

technical field [0001] The invention relates to a synthesis method and application of a ternary photocatalytic composite material. Background technique [0002] TiO 2 As an n-type semiconductor photocatalyst, it has attracted extensive attention from researchers due to its non-toxic, cheap, stable physical and chemical properties, but TiO 2 The large energy band gap (3.2eV) can only be excited by ultraviolet light to limit its application. To improve the efficiency of solar energy utilization, researchers have been working on photocatalysts that can respond to visible light. TiO doped with non-metal elements 2 , such as N-TiO 2 , forming a sublayer, reducing the TiO 2 The bandgap width of the TiO 2 Form traps in the middle, reduce the recombination rate of electron-hole pairs, and improve the photocatalytic activity; but N-TiO 2 It is still unable to achieve an excellent response in the visible light region, resulting in the degradation of methylene blue only under th...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J35/10C02F1/30C02F101/30
CPCB01J27/24C02F1/30C02F2101/308C02F2101/40C02F2305/10B01J35/33B01J35/61B01J35/39
Inventor 薛丽梅安凤至杨延昊孔梦强马原王晓栋王安恕刘思含谢丽萍徐云青金焱翥杨春霞展召顺赵玉华李晓梅董永利王劲草宋国策
Owner HEILONGJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY