PDINH-coated TiO2 photocatalyst as well as preparation method and application thereof

A technology of photocatalyst and titanium dioxide, which is applied in the field of PDINH@TiO2 photocatalyst and its preparation, can solve the problems of not being able to suppress the rapid recombination of photogenerated electrons and holes, and reducing the photocatalytic performance

Pending Publication Date: 2021-02-12
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nevertheless, due to the TiO 2 The bandgap width cannot well suppress the rapid recombination of photogenerated electrons and holes, which greatly reduces its photocatalytic performance.
And TiO 2 , PDINH and PDINH@TiO 2 There are few reports on the use of catalysts for photodegradation of organic pollutants

Method used

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  • PDINH-coated TiO2 photocatalyst as well as preparation method and application thereof
  • PDINH-coated TiO2 photocatalyst as well as preparation method and application thereof
  • PDINH-coated TiO2 photocatalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Examples 1-4 are PDINH@TiO 2 Photocatalyst TiO 2 As an example of the load temperature study when loading PDINH, Example 1 is 0°C, Example 2 is 20°C, Example 3 is 40°C, and Example 4 is 60°C.

[0033] Example 1

[0034] A PDINH@TiO 2 The preparation method of photocatalyst, concrete steps are as follows:

[0035] (1) Weigh 0.3g TiO 2, measure 10mL H 2 SO 4 Place it in a 250mL beaker and stir it magnetically for 12h to obtain a mixed solution.

[0036] (2) Add 0.3g PDINH to the mixture of (1) and sonicate for 10min, then slowly add 100mL distilled water to the above solution, then put the 250mL beaker containing the solution into a 2000mL beaker and add ice water for ice water cooling , and keep the temperature at 0°C and stir for 4h. Finally, centrifuged at 10000rpm / min, alternately washed with absolute ethanol and distilled water for 3 times, and dried at 60°C for 12h to obtain PDINH@TiO 2 powder.

[0037] Catalyst performance evaluation, the photocatalytic d...

Embodiment 2

[0040] A PDINH@TiO 2 The preparation method of photocatalyst, concrete steps are as follows:

[0041] (1) Weigh 0.3g TiO 2 , measure 10mL H 2 SO 4 Place it in a 250mL beaker and stir it magnetically for 12h to obtain a mixed solution.

[0042] (2) Add 0.3g of PDINH to the mixture of (1) and sonicate for 10min, then slowly add 100mL of distilled water into the above solution, and then stir the solution at 20°C for 4h. Finally, centrifuged at 10000rpm / min, alternately washed with absolute ethanol and distilled water for 3 times, and dried at 60°C for 12h to obtain PDINH@TiO 2 powder.

[0043] like figure 1 As shown, the loading temperature of the catalyst in this example is 20°C, and the prepared PDINH@TiO 2 The removal rate of catalyst degraded phenol was 91.29%.

[0044] figure 2 It is the performance curve of self-degradation of 6ppm phenol solution under 300W simulated sunlight, by figure 2 It can be seen that the 6 ppm phenol solution basically does not self-deg...

Embodiment 3

[0047] A PDINH@TiO 2 The preparation method of photocatalyst, concrete steps are as follows:

[0048] (1) Weigh 0.3g TiO 2 , measure 10mL H 2 SO 4 Place it in a 250mL beaker and stir it magnetically for 12h to obtain a mixed solution.

[0049] (2) Add 0.3g of PDINH to the mixture of (1) and sonicate for 10min, then slowly add 100mL of distilled water into the above solution, and then stir the solution at 40°C for 4h. Finally, centrifuged at 10000rpm / min, alternately washed with absolute ethanol and distilled water for 3 times, and dried at 60°C for 12h to obtain PDINH@TiO 2 powder.

[0050] like figure 1 As shown, the loading temperature of the catalyst in this example is 40°C, and the prepared PDINH@TiO 2 The removal rate of catalyst degraded phenol was 80.33%.

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Abstract

The invention discloses a PDINH (at) TiO2 photocatalyst as well as a preparation method and the application thereof. The photocatalyst is a core-shell flaky nano material and comprises PDINH and TiO2in a mass ratio of 1: (0.25-2), the PDINH is a carrier, and the TiO2 is a nano load. The preparation method comprises the following steps: dispersing TiO2 in concentrated sulfuric acid, and stirring to obtain a mixed solution; adding PDINH into the mixed solution for ultrasonic treatment, slowly adding distilled water into the solution, controlling the temperature and stirring; and finally, centrifuging, washing and drying to obtain the PDINH-coated TiO2 photocatalyst. The preparation method disclosed by the invention is simple and feasible, and the organic-inorganic composite PDINH-coated TiO2 photocatalyst with the nanosheet structure has remarkable photocatalytic dynamic characteristics.

Description

technical field [0001] The invention belongs to the technical field of chemical catalysis, and specifically relates to a PDINH@TiO 2 Photocatalyst and its preparation method and application. Background technique [0002] Phenol (C 6 h 5 OH) has a wide range of uses and can be used in the production of certain resins, preservatives, fungicides and pharmaceuticals. These organic substances reduce the penetration of light into the aquatic ecosystem, thus affecting the photosynthesis of aquatic organisms. The pollution of phenol and its derivatives in the environment has gradually emerged. These organic compounds cannot be naturally degraded in the ecological environment and are persistent. Harm people's health, so it is urgent to solve this problem. The concentration of organic pollutants in the natural environment is low, and traditional technical means are difficult to achieve a good degradation effect, but photocatalysis is a simple and feasible technology, which can not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/02C02F1/30C02F101/34
CPCB01J35/004B01J31/0247C02F1/30C02F2305/10C02F2101/345
Inventor 许琦徐晨晨张奇
Owner YANCHENG INST OF TECH
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