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TiO2 catalyst for catalytically eliminating benzene series in air and preparation method of TiO2 catalyst

A technology for catalysts and benzene series, which is applied in the field of TiO2 catalyst and its preparation to catalyze the elimination of benzene series in the air. It can solve the problems of irregular pore size distribution, limited catalytic performance, and underdeveloped pores, so as to reduce the cost of the catalyst and repeat the process. Good performance and stable performance

Pending Publication Date: 2021-07-09
NANJING MASTER HEALTH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Existing metal oxides have the following problems: (1) Conventional metal oxides have defects such as small specific surface area, underdeveloped pores, and irregular pore size distribution, which greatly limit their catalytic performance; Porous Oxide Catalysts for Catalytic Elimination of Benzene Series

Method used

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  • TiO2 catalyst for catalytically eliminating benzene series in air and preparation method of TiO2 catalyst
  • TiO2 catalyst for catalytically eliminating benzene series in air and preparation method of TiO2 catalyst
  • TiO2 catalyst for catalytically eliminating benzene series in air and preparation method of TiO2 catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] TiO in this example 2 The preparation method of catalyst comprises the following steps:

[0026] 1) Titanium sheet polishing: Cut the titanium sheet into rectangular strips of 6cm×1cm, and completely immerse in the pre-configured polishing solution (volume ratio V(HF):V(HNO 3 ):V(H 2 (O)=1:1:2) for about 15s, rinse with deionized water first, then soak in deionized water for 15min, dry the titanium piece for later use, and stick a waterproof tape on one end of the titanium piece to ensure the oxidation area 4cm 2 ;

[0027] 2) Primary oxidation: with titanium sheet as the anode and graphite as the cathode, the electrolyte composition is 0.5wt% NH 4 F and 2wt%H 2 Anodic oxidation was carried out in ethylene glycol solution of O, the oxidation current was 40mA, the oxidation time was 900s, and the oxidation temperature was 20°C;

[0028] 3) Ultrasonic stripping: put the oxidized sample in deionized water, and ultrasonic stripping for 15 minutes;

[0029] 4) Seconda...

Embodiment 2

[0033] Compared with Example 1, the difference is that the primary oxidation and secondary oxidation time are both 300 seconds, and other operating conditions are the same as in Example 1.

Embodiment 3

[0035] Compared with Example 1, the difference is that the primary oxidation and secondary oxidation time are both 600 seconds, and other operating conditions are the same as in Example 1.

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Abstract

The invention provides a TiO2 catalyst for catalytically eliminating benzene series in air, and belongs to the field of catalytic purification of benzene series pollution; the TiO2 catalyst is obtained through an anodic oxidation method, and has a porous ordered nanotube structure. The preparation process of the TiO2 catalyst comprises the steps of primary oxidation, secondary oxidation, ammonium fluoride soaking, high-temperature annealing and the like. According to the catalyst, the TiO2 oxide which is formed by oxidizing non-noble metal titanium and has a porous ordered nanotube structure is used as an active component, so that the cost of the catalyst is greatly reduced, and the catalyst is high in specific surface area and good in stability, shows good benzene series catalytic combustion activity at a high reaction air speed and a low reaction temperature, and has a good application value.

Description

technical field [0001] The invention relates to the technical field of a non-noble metal catalyst for the catalytic combustion of benzene series, in particular to a TiO catalyst that catalyzes the elimination of benzene series in the air 2 Catalyst and method for its preparation. Background technique [0002] Volatile organic compounds, the precursors of ozone, photochemical smog, and secondary aerosols, have long been recognized as major contributors to air pollution. Many VOCs pose a huge threat to human health due to their characteristics of high toxicity, stench, gene mutation and carcinogenicity, among which the hazards of benzene series are more prominent. With the development of urbanization and industrialization, the sources of benzene series are various, such as outdoor sources such as chemical plants, oil refineries, shoe factories, food processing plants, printing plants, textile factories, leather factories and electronic component factories, etc.; indoor source...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C25D11/26B82Y40/00F23G7/07
CPCB01J21/063C25D11/26B82Y40/00F23G7/07F23G2209/14
Inventor 王丹亮万远鑫韩小兵韩影盛亚龙
Owner NANJING MASTER HEALTH TECH CO LTD
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