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Noble Metal Decoration and Presulfation on TiO2:Increased Photocatalytic Activity and Efficient Esterification of n-Butanol with Citric Acid


Affiliations
1 School of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
2 Collaborative Innovation Center of Clean Coal Gasification Technology, Sanming University, Sanming 365004, China
3 Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China
 

TiO2 has been widely used as a key catalyst in photocatalytic reactions; it also shows good catalytic activity for esterification reactions. Different sulfated M-TiO2 nanoparticles (M = Ag, Au, Rh, and Pt) were prepared by photodeposition and ultrasonic methods. The results show that the noble metal nanoparticles, which were loaded onto a TiO2 surface, slightly affected the crystal phase and particle size of TiO2. Among all the catalysts, SO42−/Au-TiO2 exhibited the best catalytic activity in the esterification reaction for the synthesis of citric acid n-butyl acetate and in the decomposition of methyl orange, as confirmed by a high conversion rate of up to 98.2% and 100% degradation rate, respectively. This can be attributed to an increase in the Lewis acidity of the catalyst and increased separation efficiency of electron-hole pairs. This superior catalyst has great potential applications in esterification reactions and waste water treatments.
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  • Noble Metal Decoration and Presulfation on TiO2:Increased Photocatalytic Activity and Efficient Esterification of n-Butanol with Citric Acid

Abstract Views: 77  |  PDF Views: 0

Authors

Yu Niu
School of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
Pan Huang
School of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
Fuying Li
Collaborative Innovation Center of Clean Coal Gasification Technology, Sanming University, Sanming 365004, China
Kai Yang
Research Institute of Photocatalysis, State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou 350002, China
Jinbei Yang
School of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
Renzhang Wang
Collaborative Innovation Center of Clean Coal Gasification Technology, Sanming University, Sanming 365004, China
Cheng Lin
School of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
Ting Qiu
School of Chemical Engineering, Fuzhou University, Fuzhou 350116, China

Abstract


TiO2 has been widely used as a key catalyst in photocatalytic reactions; it also shows good catalytic activity for esterification reactions. Different sulfated M-TiO2 nanoparticles (M = Ag, Au, Rh, and Pt) were prepared by photodeposition and ultrasonic methods. The results show that the noble metal nanoparticles, which were loaded onto a TiO2 surface, slightly affected the crystal phase and particle size of TiO2. Among all the catalysts, SO42−/Au-TiO2 exhibited the best catalytic activity in the esterification reaction for the synthesis of citric acid n-butyl acetate and in the decomposition of methyl orange, as confirmed by a high conversion rate of up to 98.2% and 100% degradation rate, respectively. This can be attributed to an increase in the Lewis acidity of the catalyst and increased separation efficiency of electron-hole pairs. This superior catalyst has great potential applications in esterification reactions and waste water treatments.