Noble Metal Decoration and Presulfation on TiO2: Increased Photocatalytic Activity and Efficient Esterification of n-Butanol with Citric Acid. (2nd March 2016)

• Record Type: Journal Article
• Authors: Niu, Yu; Huang, Pan; Li, Fuying; Yang, Kai; Yang, Jinbei; Wang, Renzhang; Lin, Cheng; Qiu, Ting
• Other Names: Speltini Andrea Academic Editor.
• Is Part Of: International journal of photoenergy. Volume 2016(2016)
• Publication Date: 2016-03-02
• Subjects: Photochemistry -- Periodicals; Photobiology -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Photochimie; Photobiologie; Chimie physique et théorique; Chemistry, Physical and theoretical; Photobiology; Photochemistry; Electronic journals; Periodicals; 541.35
• DOI: 10.1155/2016/4618924
• Languages: English
• ISSNs: 1110-662X

Abstract

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, S O 4 2 - /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 wastewater treatments.