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Black titanium dioxide/silver phosphate composite photocatalyst as well as preparation method and application thereof

A technology of black titanium dioxide and silver phosphate, which is applied in the field of water treatment, can solve the problems of relatively little attention to the removal of antibiotic compound pollution, achieve good application prospects, improve stability, and high photocatalytic efficiency

Inactive Publication Date: 2019-12-20
SHANGHAI ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the detected antibiotic content is relatively low, due to its direct discharge, high solubility, refractory biodegradation, and continuous accumulation of river sediments, antibiotics have become a potential micro-pollutant in ecological aquatic systems, and studies have confirmed that antibiotic pollutants in water The existence of may become a potential influencing factor affecting the formation of cyanobacterial blooms
At present, less attention has been paid to the removal of combined pollution of algal blooms and antibiotics in water bodies

Method used

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  • Black titanium dioxide/silver phosphate composite photocatalyst as well as preparation method and application thereof
  • Black titanium dioxide/silver phosphate composite photocatalyst as well as preparation method and application thereof
  • Black titanium dioxide/silver phosphate composite photocatalyst as well as preparation method and application thereof

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preparation example Construction

[0030] The invention provides the preparation method of the black titanium dioxide / silver phosphate composite photocatalyst described in the above scheme, comprising the following steps:

[0031] The dispersion liquid of black titanium dioxide is mixed with silver salt, and a solution that can provide phosphate ions is added to the obtained mixed system, and a precipitation reaction is carried out to obtain a black titanium dioxide / silver phosphate composite photocatalyst.

[0032] In the present invention, the preparation of the black titanium dioxide preferably comprises the following steps:

[0033] Mixing the first mixed solution including the titanium source and absolute ethanol with the second mixed solution including the inhibitor, water and absolute ethanol, performing a hydrolysis reaction to obtain a jelly;

[0034] The colloid was calcined under nitrogen to obtain black titanium dioxide.

[0035] In the present invention, the first mixed solution including titanium...

Embodiment 1

[0059] Preparation of black titanium dioxide:

[0060] (1) Weigh 0.2g of urea and add it to 20mL of absolute ethanol at 400rpm and stir for 1h, then add 14mL of tetrabutyl titanate, and continue to stir at 400rpm for 1h to form the first mixed solution;

[0061] (2) Stir 1 mL of concentrated hydrochloric acid, 5 mL of deionized water and 20 mL of absolute ethanol at 400 rpm for 1 hour to form a second mixed solution;

[0062] (3) Add the second mixed solution dropwise (3-4mL / min) into the first mixed solution, and stir with a glass rod to form a white gel-like substance;

[0063] (4) Place the white jelly substance in an oven at 80° C. for 12 hours, and grind to form a powdery white substance;

[0064] (5) Put the white substance in a tube furnace in a nitrogen atmosphere, raise the temperature to 500°C at 4°C / min, keep it for 2h, and form black titanium dioxide, which is recorded as b-TiO 2 .

[0065] Preparation of black titanium dioxide / silver phosphate composite photoca...

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Abstract

The invention relates to the technical field of water treatment, and in particular relates to a black titanium dioxide / silver phosphate composite photocatalyst as well as a preparation method and application thereof. The black titanium dioxide / silver phosphate composite photocatalyst provided by the invention comprises black titanium dioxide and silver phosphate dispersed on the surface of the black titanium dioxide. According to the method, the black titanium dioxide is compounded with the silver phosphate, so that the problem of low photocatalytic efficiency of the black titanium dioxide isovercome, and the stability in the application process of the silver phosphate is greatly improved by accelerating electron transfer; and the composite photocatalyst can efficiently and stably removesingle and combined contamination of typical harmful algae and / or antibiotics in water.

Description

technical field [0001] The invention relates to the technical field of water treatment, in particular to a black titanium dioxide / silver phosphate composite photocatalyst and its preparation method and application. Background technique [0002] With the development of modern industry, the eutrophication of water body is serious. Algae overgrowth in eutrophic water forms algae blooms, which leads to a decrease in dissolved oxygen content in the water, a decrease in species diversity, and ultimately destroys the balance of the water ecosystem. In particular, algal toxins released by algae blooms into water bodies are difficult to be completely removed by conventional water treatment processes, and are easy to accumulate in aquatic organisms, which can seriously threaten human health through drinking water and food. In addition, various pharmaceuticals and personal care products (PPCPs) are frequently detected in polluted water bodies, and antibiotic pollution is a typical sub...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/18B01J37/03C02F1/30C02F1/50C02F101/30
CPCB01J27/1817B01J37/031C02F1/30C02F1/50C02F2101/30C02F2305/10B01J35/39
Inventor 周丽邹国燕崔娜欣张旭蔡敏陈桂发
Owner SHANGHAI ACAD OF AGRI SCI
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