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Preparation method of Cu/Pd alloy modified TiO2 catalyst for reductive dechlorination materials

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

Active Publication Date: 2017-10-03
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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  • Preparation method of Cu/Pd alloy modified TiO2 catalyst for reductive dechlorination materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0029] Take 1 mL of HF solution with a concentration of 40% by mass, and add it dropwise into a beaker containing 25 mL of tetrabutyl titanate; stir for 2 hours, then transfer it to a hydrothermal kettle, and place it in an oven to raise the temperature to 180°C for 24 hours; the resulting white The solid was first washed three times with deionized water, and 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 the nano-flaky TiO was obtained after cooling. 2 catalyst;

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

[0031] Take 0.088g Na 2 PdCl 4 , 0.034g CuCl 2 2H 2 O and 0.186g disodium edetate were dissolved in 100mL deionized water to form a mixed solution, and 7.98g (1) of prepared TiO was added 2 The catalyst was transferred to ...

Embodiment 2

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

[0035] Take 2 mL of HF solution with a concentration of 40% by mass, and add it dropwise into a beaker containing 25 mL of tetrabutyl titanate; stir for 2 hours, then transfer it to a hydrothermal kettle, place it in an oven and raise the temperature to 180°C for 24 hours; the resulting white The solid was first washed three times with deionized water, and 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 the nano-flaky TiO was obtained after cooling. 2 catalyst;

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

[0037] Take 0.11g Na 2 PdCl 4 , 0.094g CuSO 4 ·5H 2 O and 0.28g of disodium edetate were dissolved in 100mL of deionized water to form a mixed solution, and 7.98g of TiO prepared in (1) was added 2 The catalyst was transferre...

Embodiment 3

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

[0041] Take 3 mL of HF solution with a concentration of 40% by mass, and add it dropwise into a beaker containing 25 mL of tetrabutyl titanate; stir for 2 hours, then transfer it to a hydrothermal kettle, place it in an oven and raise the temperature to 180°C for 24 hours; the resulting white The solid was first washed three times with deionized water, and 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 the nano-flaky TiO was obtained after cooling. 2 catalyst;

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

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

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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 high electron transfer efficiency under visible light 2 The preparation method of the catalytic material is applied to catalytic reduction and removal of chlorine-containing organic matter in water under visible light, and belongs to the field of material preparation and environmental technology. Background technique [0002] Chlorinated organic compounds are important chemical raw materials and organic solvents, which are widely used in chemical, pharmaceutical, agricultural, leather and other industries. Chlorinated organic compounds are generally volatile and semi-volatile organic compounds, which are easy to migrate in the environment, and can enter the environment through volatilization, container leakage, wastewater discharge, pesticide use, and combustion of finished products containing chlorinated organic compounds, polluting the atmosphere, soil, groundwater and Surface wat...

Claims

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Application Information

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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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