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Preparation method for Co-Ni dual-metal-loaded TiO2(B) photocatalysis material and application of photocatalysis material

A photocatalytic material, bimetallic technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, heterogeneous catalyst chemical elements, etc. The problem of easy recombination of holes, etc., can improve the separation and migration rate, reduce the activation energy and overpotential, and improve the stability.

Inactive Publication Date: 2018-11-23
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this material also has some defects, that is, the electrons and holes generated by photoexcitation are easy to recombine, which limits the occurrence of photogenerated redox reactions on the surface.

Method used

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  • Preparation method for Co-Ni dual-metal-loaded TiO2(B) photocatalysis material and application of photocatalysis material
  • Preparation method for Co-Ni dual-metal-loaded TiO2(B) photocatalysis material and application of photocatalysis material
  • Preparation method for Co-Ni dual-metal-loaded TiO2(B) photocatalysis material and application of photocatalysis material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of Co-Ni Bimetallic Supported TiO 2 (B) the method for photocatalytic material, its preparation steps are as follows:

[0032] Step 1. Weigh 200mg of TiO 2 (B) and 3mg Ni(NH 3 ) 6 Cl 2 , 3.4mg[Co(NH 3 ) 5 Cl]Cl 2 Put it in a beaker (that is, the atomic ratio of Ni to Ti, Co to Ti is 0.5:100), add 100mL deionized water to the beaker, and ultrasonicate the resulting turbid liquid for 10min to make TiO 2 (B) mix evenly with ammonia compound;

[0033] Step 2, adjusting the pH value of the homogeneous turbid liquid obtained in Step 1 to pH=11 with ammonia water and hydrochloric acid;

[0034] Step 3, place the turbid liquid obtained in Step 2 in an orbital shaker and shake for 1.5h, and shake at a constant temperature to obtain the surface adsorbed Ni(NH 3 ) 6 Cl 2 and [Co(NH 3 ) 5 Cl]Cl 2 TiO 2 (B) turbid liquid;

[0035] Step 4, the TiO obtained in step 3 2 (B) Put the turbid liquid under a 300W xenon lamp and use 150mW / m 3 The light irradiate...

Embodiment 2

[0038] Preparation of Co-Ni Bimetallic Supported TiO 2 (B) the method for photocatalytic material, its preparation steps are as follows:

[0039] Step 1, the atomic ratio of Ni to Ti, Co to Ti is 0.7:100, 200mg of TiO 2 (B) Added Ni(NH 3 ) 6 Cl 2 , [Co(NH 3 ) 5 Cl]Cl 2 4.2 mg and 4.8 mg respectively, that is, the atomic ratios of Ni to Ti and Co to Ti are both 0.7:100. Add 150 mL of deionized water to the beaker, and ultrasonicate the obtained turbid liquid for 7 minutes to make TiO 2 (B) mix evenly with ammonia compound;

[0040] Step 2, adjusting the pH value of the homogeneous turbid liquid obtained in Step 1 to pH=10.8 with ammonia water and hydrochloric acid;

[0041] Step 3, place the turbid liquid obtained in Step 2 in an orbital shaker and shake for 2 hours, and ultrasonically oscillate to obtain the surface adsorbed Ni(NH 3 ) 6 Cl 2 and [Co(NH 3 ) 5 Cl]Cl 2 TiO 2 (B) turbid liquid;

[0042] Step 4, the TiO obtained in step 3 2 (B) The turbid liquid is...

Embodiment 3

[0045] Preparation of Co-Ni Bimetallic Supported TiO 2 (B) the method for photocatalytic material, its preparation steps are as follows:

[0046] Step 1, the atomic ratio of Ni to Ti, Co to Ti is 1:100, 200mg of TiO 2 Ni(NH) added in (B) 3 ) 6 Cl 2 , [Co(NH 3 ) 5 Cl]Cl 2 The amount is 6mg, 6.8mg respectively, that is, the atomic ratio of Ni to Ti, Co to Ti is 1:100. Add 100mL of deionized water to the beaker, and ultrasonicate the obtained turbid liquid for 10min to make TiO 2 (B) mix evenly with ammonia compound;

[0047] Step 2, adjusting the pH value of the homogeneous turbid liquid obtained in Step 1 to pH=11.2 with ammonia water and hydrochloric acid;

[0048] Step 3, place the turbid liquid obtained in step 2 in an orbital shaker and shake for 0.5h, and then you can get Ni(NH) adsorbed on the surface. 3 ) 6 Cl 2 and [Co(NH 3 ) 5 Cl]Cl 2 TiO 2 (B) turbid liquid;

[0049] Step 4, the TiO obtained in step 3 2 (B) The turbid liquid is placed under a 300W hel...

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Abstract

The invention discloses a preparation method for a Co-Ni dual-metal-loaded TiO2(B) photocatalysis material and application of the photocatalysis material in generating hydrogen in a water photohydrolysis system. The method mainly comprises the following steps: weighing TiO2(B) and Ni(NH3)6Cl2, [Co(NH3)5Cl]Cl2 into a beaker, and adding deionized water into the beaker, and performing ultrasonic treatment for enabling TiO2 (B) and ammonate to uniformly mix; regulating the pH value to 10.8-11.2 by ammonia water and hydrochloric acid; shaking obtained emulsion for 0.5-2 hours to obtain TiO2(B) emulsion adsorbed with Ni(NH3)6Cl2 and [Co(NH3)5Cl]Cl2 on surface; performing light illumination for 0.5-1.5 hours, reducing the ammonate, alternatively flushing a sample obtained after reaction with deionized water and liquor, and drying in a vacuum drying oven to obtain the Co-Ni dual-metal-loaded TiO2(B) photocatalysis material. Compared with the original TiO2(B), the Co-Ni dual-metal-loaded TiO2(B) photocatalysis material has more active sites, a lower current carrier recombination rate and higher catalytic activity. Moreover, the method is low in implementation cost, is convenient, simple andeasy to implement; and the obtained material is stable in structure, is lasting in activity, and is an efficient economical method.

Description

technical field [0001] The invention belongs to the field of hydrogen production catalyst materials in photolysis water systems, and relates to TiO supported by bimetallic cocatalysts 2 (B) nanomaterials, specifically related to a Co-Ni bimetallic loaded TiO 2 (B) Preparation method of photocatalytic material and use of the photocatalytic material. Background technique [0002] In recent years, in order to meet the needs of economic and social development, non-renewable energy sources such as coal, oil, and natural gas are being used in large quantities. At present, in order to alleviate the energy shortage problem, people are working to reduce the dependence on fossil energy. Among them, hydrogen has received extensive attention and research because of its high energy generated during combustion and its cleanliness. The technology of photocatalysis can decompose water to produce hydrogen, that is, convert solar energy into hydrogen energy. Among many photocatalytic mate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C01B3/04
CPCC01B3/042B01J23/002B01J23/755B01J2523/00B01J35/39B01J2523/47B01J2523/845B01J2523/847Y02E60/36
Inventor 朱胜利公悦孔祥辰崔振铎杨贤金
Owner TIANJIN UNIV
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