Platinum atom-loaded titanium dioxide photocatalytic material and preparation method thereof

A photocatalytic material, titanium dioxide technology, applied in the field of photocatalytic materials, can solve the problems of not being able to fully utilize solar energy, and achieve the effects of increasing the photoresponse range, enhancing active sites, and good photocatalytic hydrogen production effects

Inactive Publication Date: 2018-11-06
SHAANXI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional titanium dioxide photocatalytic material is a white powder, which can only absorb ultraviolet light and be excited to generate photogenerated charges, and then play the role of photocatalytic oxidation or photoelectric conversion, and cannot fully utilize most of the energy in sunlight.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] a. Add 0.3g of ascorbic acid into 100mL of deionized water, and keep stirring for 10 minutes to obtain a transparent solution;

[0032] b. Add 3.1mL titanium trichloride (commercially available titanium trichloride aqueous solution, mass fraction: 37%) to the transparent solution in step a to form a purple solution, then add 1mol / L sodium hydroxide solution until the pH value was 4.5, and continued to stir for 30 minutes to obtain a black titanium dioxide suspension;

[0033] c. Transfer the solution in step b to a 100mL hydrothermal reaction kettle, and react at a temperature of 180°C for 12 hours to obtain a nano-titanium dioxide mixed solution;

[0034] d. Wash the nano black titanium dioxide in step c through 50mL deionized water and 50mL ethanol to pH 7 respectively, and dry to obtain the nano titanium dioxide photocatalyst;

[0035] e. Weigh 0.2 g of the titanium dioxide powder obtained in step d, add it to 400 mL of deionized water, and obtain a uniform titanium...

Embodiment 2

[0040] a. Add 0.7g of ascorbic acid into 70mL of deionized water, and keep stirring for 10 minutes to obtain a transparent solution;

[0041] b. Add 3.1mL titanium trichloride (commercially available titanium trichloride aqueous solution, mass fraction: 37%) to the transparent solution in step a to form a purple solution, then add 1mol / L sodium hydroxide solution until the pH value was 4.5, and continued to stir for 30 minutes to obtain a black titanium dioxide suspension;

[0042] c. Transfer the solution in step b to a 100mL hydrothermal reaction kettle, and react at a temperature of 180°C for 12 hours to obtain a nano-titanium dioxide mixed solution;

[0043] d. Wash the nano black titanium dioxide in step c through 50mL deionized water and 50mL ethanol to pH 7 respectively, and dry to obtain the nano titanium dioxide photocatalyst;

[0044] e. Weigh 0.2 g of the titanium dioxide powder obtained in step d, add it to 200 mL of deionized water, and obtain a uniform titanium ...

Embodiment 3

[0049] a. Add 0.7g of ascorbic acid into 70mL of deionized water, and keep stirring for 10 minutes to obtain a transparent solution;

[0050] b. Add 3.1mL titanium trichloride (commercially available titanium trichloride aqueous solution, mass fraction is 37%) to the transparent solution of step a to form a purple solution, then add 10mol / L sodium hydroxide solution until the pH value was 4.5, and continued to stir for 30 minutes to obtain a black titanium dioxide suspension;

[0051] c. Transfer the solution in step b to a 100mL hydrothermal reaction kettle, and react at a temperature of 180°C for 12 hours to obtain a nano-titanium dioxide mixed solution;

[0052] d. Wash the nano black titanium dioxide in step c through 50mL deionized water and 50mL ethanol to pH 7 respectively, and dry to obtain the nano titanium dioxide photocatalyst;

[0053]e. Weigh 0.2 g of the titanium dioxide powder obtained in step d, add it to 200 mL of deionized water, and obtain a uniform titaniu...

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PUM

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Abstract

The invention provides a platinum atom-loaded titanium dioxide photocatalytic material and a preparation method thereof. The preparation method of the photocatalytic material comprises the following steps: 1), dispersing nanometer titanium dioxide in deionized water to form a titanium dioxide dispersion; 2), adding a platinum precursor into the titanium dioxide dispersion, and uniformly mixing bystirring to obtain a mixed solution A, wherein the mass of platinum is 0.3-1.5% of that of the titanium dioxide; 3), performing a photoreduction reaction on the mixed solution A under light irradiation to reduce the platinum precursor into elemental platinum, and loading the platinum precursor onto the nanometer titanium dioxide to obtain a mixed solution B; 4), centrifuging the mixed solution B to obtain a precipitate, and washing and drying the precipitate to obtain the platinum atom-loaded black titanium dioxide photocatalytic material. According to the preparation method, the platinum is uniformly and highly dispersively loaded onto the titanium dioxide through control of the using amount of the platinum precursor, platinum atoms are deposited by an in-situ photoreduction technology, and the existing form of the platinum atoms on the surface of the black titanium dioxide is controlled through control to the addition amount of chloroplatinic acid, so that the photocatalytic effect is improved.

Description

technical field [0001] The invention belongs to the field of photocatalytic materials, and relates to a platinum atom supported titanium dioxide photocatalytic material and a preparation method thereof. Background technique [0002] Photocatalytic technology is an emerging technology developed in the past three decades, and has broad application prospects in the fields of energy and the environment. Titanium dioxide is the most widely used photocatalytic material in photocatalytic technology. Due to its stable chemical properties, high photocatalytic efficiency, and environmental friendliness, it is considered to be the most promising material in photocatalytic technology. However, the concept of single atom has also received extensive attention and research, especially single-atom noble metals have become a research hotspot in recent years due to their high activity and low cost, and the carrier of single-atom deposition has also become a research topic. object. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/42B01J35/10C01B3/04
CPCB01J23/42B01J35/004B01J35/10C01B3/042C01B2203/0277C01B2203/107Y02E60/36
Inventor 朱云庆王田王传义王文娟
Owner SHAANXI UNIV OF SCI & TECH
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