Ultra-low content of Pt modified CdS nanorods: Preparation, characterization, and application for photocatalytic selective oxidation of aromatic alcohols and reduction of nitroarenes in one reaction system

Sujuan Zhang; Weixin Huang; Xianliang Fu; Gaoli Chen; Sugang Meng; Shifu Chen

doi:10.1016/j.jhazmat.2018.07.108

Ultra-low content of Pt modified CdS nanorods: Preparation, characterization, and application for photocatalytic selective oxidation of aromatic alcohols and reduction of nitroarenes in one reaction system

J Hazard Mater. 2018 Oct 15:360:182-192. doi: 10.1016/j.jhazmat.2018.07.108. Epub 2018 Aug 3.

Authors

Sujuan Zhang¹, Weixin Huang², Xianliang Fu³, Gaoli Chen⁴, Sugang Meng⁴, Shifu Chen⁵

Affiliations

¹ Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, Anhui, China; Key Lab of Clean Energy and Green Circulation, College of Chemistry and Material Science Huaibei Normal University, Huaibei, 235000, Anhui, China. Electronic address: zhangsujuancgl@163.com.
² Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Chemical Physics, University of Science and Technology of China, Hefei, 230026, Anhui, China. Electronic address: huangwx@ustc.edu.cn.
³ Key Lab of Clean Energy and Green Circulation, College of Chemistry and Material Science Huaibei Normal University, Huaibei, 235000, Anhui, China. Electronic address: fuxiliang@gmail.com.
⁴ Key Lab of Clean Energy and Green Circulation, College of Chemistry and Material Science Huaibei Normal University, Huaibei, 235000, Anhui, China.
⁵ Key Lab of Clean Energy and Green Circulation, College of Chemistry and Material Science Huaibei Normal University, Huaibei, 235000, Anhui, China. Electronic address: chshifu@chnu.edu.cn.

PMID: 30099361
DOI: 10.1016/j.jhazmat.2018.07.108

Abstract

A series of Pt nanoparticles (with size of 3-4 nm) decorated CdS nanorods were prepared via a simple solvothermal method. The samples were then used for photocatalytic selective oxidation (SO) of aromatic alcohols and reduction (SR) of nitroarenes in one reaction system. The platinized samples showed enhanced activity for the conversions than pristine CdS as Pt can serve as e^- trapping and reaction sites, by which the recombination of photoinduced charge carriers can be suppressed and the adsorption of reactants and the SR of nitroarenes can be promoted. The sample loaded with only of 0.03% Pt showed the highest performance and, after irradiation for 4 h, the conversions of p-methoxybenzyl alcohol and nitrobenzene are as high as 92.7% and 94.8%, while the yields of p-methoxybenzaldehyde and aniline are 80.5% and 36.0%. The activities are about 2.0 times higher than that of CdS. The coupling reaction mechanism for the SO of aromatic alcohols to aldehydes and SR of nitroarenes to anilines in the reaction system was finally proposed.

Keywords: Aromatic alcohols; CdS nanorods; Nitroarenes; Pt nanoparticles; Selective oxidation and reduction.