Synthesis and characterisation of potassium polytitanate for photocatalytic degradation of crystal violet  

作　　者：Mohammad Shahid Ibrahim El Saliby Andrew Mc Donagh Leonard D.Tijing Jong-Ho Kim Ho Kyong Shon 

机构地区：[1]School of Civil and Environmental Engineering, University of Technology, Sydney (UTS), P.O. Box 123, Broadway, Sydney, NSW 2007,Australia [2]School of Chemistry and Forensic Science, University of Technology, Sydney (UTS), P.O. Box 123, Broadway, Sydney, NSW 2007, Australia [3]School of Applied Chemical Engineering, The Research Institute for Catalysis, Chonnam National University, Gwangju 500-757, South Korea [4]Photo & Environmental Technology Co., Ltd., Gwangju 500-460, South Korea

出　　处：《Journal of Environmental Sciences》2014年第11期2348-2354,共7页环境科学学报（英文版）

基　　金：funded by an Australian Research Council-Linkage Project (No. LP0991544);a UTS;Australian Postgraduate Award scholarship

摘　　要：Potassium titanate nanostructures were synthesised by hydrothermal treatment of TiO2 （P25） in KOH and H2O2. As-produced powders were characterised by scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, X-ray diffraction, and nitrogen adsorption-desorption methods. Longitudinally-oriented-wire-like structures with a length up to several micrometres and diameters ranging from 10 to 30 nm were obtained. Larger size fibrous nanowires resulting from the hydrotherrnal treatment showed high affinity in adsorbing crystal violet （CV）, which was mainly due to their high surface area. The photocatalytic bleaching of CV solution revealed that the wires are photoactive under ultraviolet light irradiation. Macroporous nanowires are considered as effective adsorbents of CV, capable of photocatalvtic degradation, and they can be easily separated from the solution by settling.Potassium titanate nanostructures were synthesised by hydrothermal treatment of TiO2 （P25） in KOH and H2O2. As-produced powders were characterised by scanning electron microscopy, energy-dispersive X-ray spectroscopy, transmission electron microscopy, X-ray diffraction, and nitrogen adsorption-desorption methods. Longitudinally-oriented-wire-like structures with a length up to several micrometres and diameters ranging from 10 to 30 nm were obtained. Larger size fibrous nanowires resulting from the hydrotherrnal treatment showed high affinity in adsorbing crystal violet （CV）, which was mainly due to their high surface area. The photocatalytic bleaching of CV solution revealed that the wires are photoactive under ultraviolet light irradiation. Macroporous nanowires are considered as effective adsorbents of CV, capable of photocatalvtic degradation, and they can be easily separated from the solution by settling.

关 键 词：Potassium titanate Adsorption Crystal violet Macroporous Titanium dioxide Photocatalysis 

分 类 号：X505[环境科学与工程—环境工程]