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Titanium cobalt catalyst for photothermal chemical cycle decomposition of CO2 and preparation method thereof

A cobalt catalyst and photothermochemical technology, applied in the field of catalysis, can solve problems that need to be improved, and achieve the effects of excellent photoresponse, high activity, and good photoresponse ability

Active Publication Date: 2019-03-29
ZHEJIANG ZHENENG BEILUN POWER GENERATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the activity, stability, and spectral response range of composite metal oxide catalysts need to be improved. In recent years, research on composite metal oxide catalysts has also carried out a lot of research on the above problems, aiming to develop a combination of activity, stability and economy. catalyst

Method used

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  • Titanium cobalt catalyst for photothermal chemical cycle decomposition of CO2 and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] According to the general formula Co of titanium cobalt catalyst x Ti 1-x o 2-x , set x=0.15, the simplified chemical formula is Co 0.15 Ti 0.85 o 1.85 .

[0032] According to the general formula Co x Ti 1-x o 2-x , where x=0.15, weigh CoSO according to the molar ratio 4 ·7H 2 O and TiOSO 4 , and then according to the molar ratio TiOSO 4 :C 6 h 8 o 7 ·H 2 O is 1:3 and weighs citric acid C 6 h 8 o 7 ·H 2 O, add deionized water to 80 ℃ water bath and heat until completely dissolved, TiOSO in the solution 4 The molar concentration is 0.5mol / L.

[0033] Add 5 mol / L NaOH solution dropwise to adjust the pH to 9, and continue to stir for 30 minutes to obtain a gel-like mixture; transfer it to a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, and heat it at a heating rate of 2°C / min to 160°C and keep warm for 24h; centrifuge the resulting mixture at 5000r / min for 10min, remove the insoluble matter in the lower layer, and wash with abs...

example 2

[0035] According to the general formula Co of titanium cobalt catalyst x Ti 1-x o 2-x , set x=0.01, the simplified chemical formula is Co 0.01 Ti 0.99 o 1.99 .

[0036] According to the general formula Co x Ti 1-x o 2-x , where x=0.01, weigh CoSO according to the molar ratio 4 ·7H 2 O and TiOSO 4 , and then according to the molar ratio TiOSO 4 :C 6 h 8 o 7 ·H 2 O is 1:3 and weighs citric acid C 6 h8 o 7 ·H 2 O. Add the three substances into deionized water, heat in a water bath at 80°C until completely dissolved, and TiOSO in the solution 4 The molar concentration is 0.3mol / L.

[0037] Add 7mol / L NaOH solution dropwise to adjust the pH to 9.5, and continue to stir for 30 minutes to obtain a gel-like mixture; transfer it to a polytetrafluoroethylene-lined stainless steel hydrothermal kettle, and heat it at a heating rate of 2.5°C / min to 160°C and keep warm for 24h; centrifuge the obtained mixture at a speed of 5000r / min for 10min, remove the insoluble matte...

example 3

[0039] According to the general formula Co of titanium cobalt catalyst x Ti 1-x o 2-x , set x=0.3, the simplified chemical formula is Co 0.3 Ti 0.7 o 1.7 .

[0040] According to the general formula Co x Ti 1-x o 2-x , where x=0.3, weigh CoSO according to the molar ratio 4 ·7H 2 O and TiOSO 4 , and then according to the molar ratio TiOSO 4 :C 6 h 8 o 7 ·H 2 O is 1:3 and weighs citric acid C 6 h 8 o 7 ·H 2 O, add deionized water to 80 ℃ water bath and heat until completely dissolved, TiOSO in the solution 4 The molar concentration is 0.2mol / L.

[0041] Add 10 mol / L NaOH solution dropwise to adjust the pH to 10, and continue to stir for 30 minutes to obtain a gel-like mixture; transfer it to a stainless steel hydrothermal kettle lined with polytetrafluoroethylene, and heat it at a heating rate of 3°C / min to 160°C and keep warm for 24h; centrifuge the obtained mixture at a speed of 5000r / min for 10min, remove the insoluble matter in the lower layer, and wash w...

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Abstract

The invention relates to the technical field of a catalysis, and provides a titanium cobalt catalyst for photothermal chemical cycle decomposition of CO2 and a preparation method thereof. The active components of the catalyst are composed of cobalt oxide and titanium oxide, and a formula is CoxTi1-xO2-x, wherein x is greater than 0 and less than or equal to 0.3. The catalyst of the invention has good photoresponsibility, redox and photoinduced hydrophilicity, good anti-sintering ability and high activity. The active components are widely available, inexpensive, and non-toxic, and have excellent photoresponsive characteristics, good dispersibility, small particle size and good stability. The method uses an aqueous solution system to reduce the use of an organic solvent, and uses TiOSO4 as atitanium source, which is weakly hydrolyzed by comparing with TiCl4, so that the preparation process can be further controlled.

Description

technical field [0001] The invention relates to the technical field of catalysis, in particular to a method for photothermochemical cycle decomposition of CO 2 Titanium-cobalt composite oxide catalyst and preparation method thereof. Background technique [0002] At present, the world is experiencing a critical stage of increasing shortage of energy and resources and serious environmental pollution. The consumption of primary non-renewable energy such as coal, oil, and natural gas has increased sharply with the development of human economy and society. Therefore, seeking clean and renewable energy to replace the existing primary energy is the only way to alleviate the current energy dilemma. CO 2 As the most simple and easy-to-obtain carbon source on earth, combining it with renewable energy systems and using appropriate methods to convert it into CO can not only alleviate the climate effect caused by coal burning, but also provide a feasible idea for clean energy utilizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C01B32/40
CPCC01B32/40B01J23/002B01J23/75B01J35/39
Inventor 方志星张彦威俞建楠王智化吕安斌周俊虎陈章伟倪明江胡劲逸岑可法
Owner ZHEJIANG ZHENENG BEILUN POWER GENERATION
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