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Composite nano Ag3PO4/TiO2 material with photocatalytic performance prepared by two-step process, and method and application thereof

A composite, photocatalytic technology, applied in chemical instruments and methods, chemical/physical processes, special compound water treatment, etc., can solve the problems of reduced application value, low utilization of sunlight, etc., to promote rapid transportation and separation. , Solve the effect of high cost and excellent photocatalytic performance

Active Publication Date: 2017-03-15
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However TiO 2 In practice, only the ultraviolet part of sunlight can be used, so the utilization rate of sunlight is too low, which reduces its application value

Method used

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  • Composite nano Ag3PO4/TiO2 material with photocatalytic performance prepared by two-step process, and method and application thereof
  • Composite nano Ag3PO4/TiO2 material with photocatalytic performance prepared by two-step process, and method and application thereof
  • Composite nano Ag3PO4/TiO2 material with photocatalytic performance prepared by two-step process, and method and application thereof

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Experimental program
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preparation example Construction

[0041] 2) Nano-Ag 3 PO 4 / TiO 2 preparation of

[0042] Add the rod-shaped titanium dioxide prepared in 1) into distilled water, perform ultrasonic dispersion treatment, then add silver nitrate, then drop a small amount of ammonia water and stir evenly, and finally add Na 2 HPO 4 12H 2 O, after continuing to stir fully for 2.5h, nano-Ag can be obtained 3 PO 4 / TiO 2 solution; the molar ratio of titanium dioxide and silver nitrate is 1: (1 ~ 3), silver nitrate and Na 2 HPO 4 12H 2 The molar ratio of O is 3:1;

[0043] 3) the nano-Ag prepared in 2) 3 PO 4 / TiO 2 Put the solution into the reactor for hydrothermal reaction, then carry out hydrothermal reaction at 100-160°C, after 2-4 hours of hydrothermal reaction, filter, wash, and dry (80-100°C) to obtain nano-Ag 3 PO 4 / TiO 2 particles.

[0044] In order to provide the public with a thorough understanding of the present invention, specific details are specified in the following preferred embodiments of the pres...

Embodiment 1

[0046] (1) Ultrasonic disperse 0.25 g of commercially available titanium dioxide P25 particles in 30 mL of 10 mol / L NaOH solution. After 15 min, place the solution in a polytetrafluoroethylene-lined autoclave for 16 h of hydrothermal reaction. After it was naturally cooled to room temperature, it was washed with distilled water and alcohol until it became neutral, then put into a drying oven, and dried at 80°C for 10 hours. The dried sample was added to 0.1mol / L HCI to age for 6 hours, filtered and washed until neutral, dried in a drying oven at 80°C for 10 hours, and then calcined in a muffle furnace at 450°C for 6 hours to make rod-shaped titanium dioxide particles.

[0047] (2) Ultrasonic disperse 72 mg of rod-shaped titanium dioxide prepared in 1) in 25 mL of distilled water, then add 236 mg of silver nitrate, 3-4 drops of NH 3 ·H 2 O stirred for 30min, then added 161mg Na 2 HPO 4 12H 2 O particles continue to stir for 2.5 hours to obtain nano-Ag 3 PO 4 / TiO 2 solut...

Embodiment 2

[0053] (1) Ultrasonic disperse 0.25 g of commercially available titanium dioxide P25 particles in 30 mL of 10 mol / L NaOH solution. After 15 min, place the solution in a polytetrafluoroethylene-lined autoclave for 16 h of hydrothermal reaction. After it was naturally cooled to room temperature, it was washed with distilled water and alcohol until it became neutral, then put into a drying oven, and dried at 80°C for 10 hours. The dried sample was added to 0.1mol / L HCI to age for 6 hours, filtered and washed until neutral, dried in a drying oven at 80°C for 10 hours, and then calcined in a muffle furnace at 450°C for 6 hours to make rod-shaped titanium dioxide particles.

[0054] (2) Ultrasonic disperse 108 mg of rod-shaped titanium dioxide prepared in (1) in 25 mL of distilled water, then add 236 mg of silver nitrate, 3-4 drops of NH 3 ·H 2 O stirred for 30min, then added 161mg Na 2 HPO 4 12H 2 O particles continue to stir for 2.5 hours to obtain nano-Ag 3 PO 4 / TiO 2 sol...

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Abstract

The invention discloses a composite nano Ag3PO4 / TiO2 material with photocatalytic performance prepared by a two-step process, and a method and application thereof. The preparation method comprises the following steps: carrying out reaction on raw materials P25 and NaOH in a reaction kettle at 160 DEG C for 16 hours, filtering, drying, and calcining in a muffle furnace at 450 DEG C for 6 hours to prepare rod-like nano titanium dioxide; and carrying out hydrothermal reaction on AgNO3, Na2HPO4.12H2O and polyethyleneglycol in a reaction kettle at 100-140 DEG C for 2-4 hours, thereby obtaining the composite nano Ag3PO4 / TiO2 material with photocatalytic performance. The invention aims to solve the problems of low sunlight utilization ratio, difficulty in reaction under visible light and the like in the nano TiO2 powder. After the photocatalytic performance is tested by methylene blue degradation, the calculation on the degradation rate of methylene blue indicates that the methylene blue degradation rate of the composite nano Ag3PO4 / TiO2 material prepared by the two-step hydrothermal process under visible light is up to 90% or above.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of catalyst preparation, in particular to a composite nano-Ag with photocatalytic properties for visible light prepared by a two-step hydrothermal method 3 PO 4 / TiO 2 Material. [0003] 【Background technique】 [0004] With the development of social industrialization, environmental pollution is increasing year by year. Among them, the problem of water pollution is particularly serious. However, the traditional methods to deal with water pollution are adsorption, photocatalysis, anaerobic and other treatment methods. [0005] The document "Chinese Patent CN2014101206604.X" discloses a preparation method of a magnetic nano-silver phosphate / titanium dioxide composite photocatalytic material, which is made of tetraisopropanol, methanol, silver nitrate, ferric nitrate, ferrous nitrate, ammonia water, etc. The synthesis process of the material is simple, in which titanium and silver are doped with eac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18B01J37/10C02F1/30
CPCC02F1/30B01J27/1817B01J37/10C02F2305/10B01J35/39Y02W10/37
Inventor 黄凤萍崔梦丽郭宇煜辛萌
Owner SHAANXI UNIV OF SCI & TECH
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