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Preparation method of mixed-phase titanium dioxide visible-light-induced photocatalyst derived from MOF

A titanium dioxide, visible light technology, applied in the directions of titanium dioxide, titanium oxide/hydroxide, physical/chemical process catalyst, etc., can solve the problems of limited application, visible light electron hole excitation, etc., achieve good photocatalytic degradation activity, and simple preparation method The effect of easy operation and easy preparation conditions

Active Publication Date: 2020-12-01
CHANGZHOU UNIV
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Problems solved by technology

However, the defects of conventional titanium dioxide greatly limit its application: on the one hand, the low response to visible light results in few electron holes being excited

Method used

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  • Preparation method of mixed-phase titanium dioxide visible-light-induced photocatalyst derived from MOF
  • Preparation method of mixed-phase titanium dioxide visible-light-induced photocatalyst derived from MOF
  • Preparation method of mixed-phase titanium dioxide visible-light-induced photocatalyst derived from MOF

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Embodiment 1

[0026] (1) NH 2 -Preparation of MIL-125: 1.2681g of 2-aminoterephthalic acid, 1.0618ml of titanium isopropoxide were dissolved in a mixed solvent of 50ml of DMF (N-N dimethylformamide) and 50ml of anhydrous methanol, and the mixture was stirred for 30 minutes to obtain a homogeneous mixture. The mixture was transferred to a polytetrafluoroethylene stainless steel autoclave and kept at 150 °C for 48 h. After the mixture was cooled to room temperature, the yellow NH 2 - MIL-125, rinsed several times with anhydrous methanol and DMF, dried overnight in an oven at 60°C for 12 hours.

[0027] (2) Mixed phase TiO 2 Preparation: the prepared NH 2 -Weigh 0.5g of MIL-125 into a small porcelain boat, place it in a tube furnace, set the heating rate at 1°C / min, and calcinate at 500°C for 4h under the protection of nitrogen.

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Abstract

The invention relates to a preparation method of a mixed-phase titanium dioxide visible-light-induced photocatalyst derived from MOF. The preparation method comprises the following steps: dissolving 2-aminoterephthalic acid and titanium isopropoxide in a mixed solvent of N,N-dimethylformamide (DMF) and absolute methanol, transferring the obtained mixture into a high-pressure kettle, and keeping the temperature at 150 DEG C for 48 hours to prepare NH2-MIL-125; calcining the prepared NH2-MIL-125 at a high temperature under the protection of nitrogen so as to obtain the visible-light-induced photocatalyst. The preparation method has the beneficial effects that the preparation method is simple, the preparation conditions are easy to control, and the feasibility is high. The prepared MOF-derived mixed-phase titanium dioxide visible-light-induced photocatalyst is relatively good in photocatalytic degradation efficiency under visible light, and has a certain application prospect.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic nanometer materials, and relates to a preparation method of a mixed-phase titanium dioxide visible light catalyst derived from MOF. Background technique [0002] In recent years, the sharp increase of pollutants in water has seriously damaged the ecosystem and threatened human health. Many techniques, such as adsorption, microwave catalysis, and photocatalysis, are commonly used to treat these pollutants. Among them, photocatalytic technology is a high-efficiency, low-energy processing technology. Since Fujishima and Honda first discovered the photolysis of water on the surface of titanium dioxide in 1972, due to the 2 High chemical stability and non-toxicity have become one of the most widely studied metal oxide semiconductors. However, the defects of conventional titanium dioxide greatly limit its application: on the one hand, the low response to visible light results in few electron h...

Claims

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Application Information

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IPC IPC(8): B01J21/06C01G23/08C02F1/30C02F101/30C02F101/38
CPCB01J21/063C01G23/08C02F1/30C01P2002/72C01P2004/04C02F2101/308C02F2101/38C02F2305/10B01J35/39Y02W10/37
Inventor 李忠玉赵肖寒徐松梁倩周满
Owner CHANGZHOU UNIV
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