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Cu/PD alloy modified tio for reductive dechlorinated materials 2 Catalyst preparation method

A catalyst and alloy technology, applied in the field of material preparation and environment, to achieve good dechlorination effect and reduce the amount of precious metals

Active Publication Date: 2019-08-23
JIANGSU ANQIER WASTE GAS PURIFICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no patent has been found on metal alloy modified catalysts to realize the reduction and degradation of chlorine-containing organic compounds in water under visible light.

Method used

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  • Cu/PD alloy modified tio for reductive dechlorinated materials <sub>2</sub> Catalyst preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Preparation of nano flake TiO by hydrothermal method 2 catalyst

[0029] Take 1mL of HF solution with a concentration of 40% by mass and add it dropwise to a beaker containing 25mL of tetrabutyl titanate; stir for 2 hours and then transfer to a hydrothermal kettle, place in an oven and heat up to 180°C for 24 hours; the resulting white The solid was washed three times with deionized water, then washed three times with absolute ethanol, and then dried in an oven; after the solid powder was ground, it was calcined in a muffle furnace at 350°C for 2 hours, and then cooled to obtain nano flake TiO 2 catalyst;

[0030] (2) Preparation of Cu / Pd alloy co-modified nano flake TiO by hydrothermal method 2

[0031] Take 0.088g Na 2 PdCl 4 , 0.034g CuCl 2 ·2H 2 O and 0.186g disodium ethylenediaminetetraacetic acid dissolved in 100mL deionized water to form a mixed solution, add 7.98g (1) prepared TiO 2 The catalyst was transferred to an oven at 80°C and stirred for 12 hours until the ...

Embodiment 2

[0034] (1) Preparation of nano flake TiO by hydrothermal method 2 catalyst

[0035] Take 2mL of HF solution with a concentration of 40% by mass and add it dropwise to a beaker containing 25mL of tetrabutyl titanate; stir for 2h and then transfer to a hydrothermal kettle, place in an oven and heat up to 180℃ for 24h; the resulting white The solid was washed three times with deionized water, then washed three times with absolute ethanol, and then dried in an oven; after the solid powder was ground, it was calcined in a muffle furnace at 350°C for 2 hours, and then cooled to obtain nano flake TiO 2 catalyst;

[0036] (2) Preparation of Cu / Pd alloy co-modified nano flake TiO by hydrothermal method 2

[0037] Take 0.11g Na 2 PdCl 4 , 0.094g CuSO 4 ·5H 2 O and 0.28g disodium ethylenediaminetetraacetic acid dissolved in 100mL deionized water to form a mixed solution, add 7.98g (1) prepared TiO 2 The catalyst was transferred to an oven at 80°C and stirred for 12 hours until the solution evap...

Embodiment 3

[0040] (1) Preparation of nano flake TiO by hydrothermal method 2 catalyst

[0041] Take 3 mL of HF solution with a concentration of 40% by mass and add it dropwise to a beaker containing 25 mL of tetrabutyl titanate; stir for 2 hours and then transfer to a hydrothermal kettle, place in an oven and heat up to 180°C for 24 hours; the resulting white The solid was washed three times with deionized water, then washed three times with absolute ethanol, and then dried in an oven; after the solid powder was ground, it was calcined in a muffle furnace at 350°C for 2 hours, and then cooled to obtain nano flake TiO 2 catalyst;

[0042] (2) Preparation of Cu / Pd alloy co-modified nano flake TiO by hydrothermal method 2

[0043] Take 0.28g PdCl 2 , 0.10g CuSO 4 ·5H 2 O and 0.47g disodium citrate dissolved in 100mL deionized water to form a mixed solution, add 7.98g (1) prepared TiO 2 The catalyst was transferred to an oven at 80°C and stirred for 12 h until the solution evaporated to dryness. T...

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Abstract

The invention relates to the technology of preparation of catalytic materials, and aims to provide a preparation method of a Cu / Pd alloy modified TiO2 catalyst for reductive dechlorination materials. The method comprises the following steps: preparing a nano-sheet-like TiO2 catalyst by using tetrabutyl titanate as a titanium precursor and utilizing corrosion performance of HF(hydrogen fluoride) through hydrothermal reaction; preparing a Cu / Pd alloy co-modified TiO2 catalyst through an immersion-reducing atmosphere calcination method. Complex Cu and Pd salt solutions and the catalyst are mixed and immersed, and after vacuum drying, calcination under a hydrogen reducing atmosphere is carried out. According to the preparation method disclosed by the invention, visible light response of the catalyst is realized, and high-efficient reductive hydrogenation dechlorination in aqueous solutions under visible light can be carried out by utilizing a synergistic effect of Cu / Pd alloys, and a catalytic dechlorination effect of the catalyst is superior to that of a commercialized P25 / Pd individually-loaded TiO2 catalyst. By the formation of the Cu / Pd alloys, the catalyst has the advantages that the using amount of precious metals is reduced while the good dechlorination effect is achieved, and practical application of reductive dechlorination under visible light is facilitated.

Description

Technical field [0001] The invention specifically relates to a Cu / Pd alloy modified TiO with efficient electron transfer under visible light 2 The preparation method of the catalytic material is applied to the catalytic reduction and removal of chlorine-containing organic substances in water under visible light, and belongs to the technical field of material preparation and environment. Background technique [0002] Chlorinated organic matter is an important chemical raw material and organic solvent, which is widely used in chemical, pharmaceutical, agricultural, tanning and other industries. Chlorinated organics are generally volatile and semi-volatile organics, which are easy to migrate in the environment. They can enter the environment through volatilization, container leakage, waste water discharge, pesticide use, and combustion of chlorinated organic products, polluting the atmosphere, soil, groundwater and Surface water is a key pollutant listed by the United States Environ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/89C02F1/30C02F1/70C02F101/36
Inventor 赵伟荣杨翔梅孙润泽
Owner JIANGSU ANQIER WASTE GAS PURIFICATION
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