Inhibition of Photocatalytic Activity of Basic Blue-41 by ZnO Modified Surface with Amino Silane

4th International Conference on Advanced Engineering and Technology

Limsapapkasiphon, S.^1 ; Sirisaksoontorn, W.^1 ; Songsasen, A.^1

Department of Chemistry, Faculty of Science, Kasetsart University, 50 Ngamwongwan Road, Lad Yao, Chatuchak, Bangkok

10900, Thailand^1

关键词: Absorption edges;    Band gap energy;    Basic blue 41;    Basic conditions;    IR techniques;    Modified surfaces;    Photo-catalytic;    Photocatalytic activities;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/317/1/012014/pdf
DOI  :  10.1088/1757-899X/317/1/012014

来源: IOP

【 摘 要 】

The reduction of the photo catalytic efficiency of ZnO can be achieved by modifying its surface with amino silane, which synthesized through condensation reaction under basic condition. The pH of solution was varied from 8 to 14 during the synthesis and was found that pH 12 was the most suitable pH for the preparation. All of ZMAS were characterized by Elemental Analysis which showed the highest percentage of nitrogen at 3.1064% and IR technique which indicated the Si-O-Zn bond at about 1000 cm-1. The photodegradation property of ZMAS prepared at pH 8-12 toward basic blue 41 was retarded when compared with the unmodified ZnO. Effect of mole ratio of ZnO:APTES (1:0.1, 1:0.5, 1:1, and 1:2) in the preparation of ZMAS was investigated. The photodegration activity of ZMAS prepared at mole ratio of ZnO:APTES as 1:0.5 to 1:2 toward basic blue 41 was retarded when compared with the unmodified ZnO. The coating of amino silane on ZnO surface did not have much effect on the band gap energy of modified ZnO. The absorption edge of ZMAS was only slightly shifted from 392 to 397 nm.