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Effect of Dry and Wet Environment of Ball Milling on Visible Light Catalytic Performance of Sulfur-Doped Carbon Nitride
Author NameAffiliationE-mail
TAN Jie College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China  
LI Zhi-Feng College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China  
YANG Xiao-Fei College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China  
LI Jie College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China  
ZHANG Ting-Ting College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Beijing Centre for Resource and Environmental Research, Beijing 100029, China 
zhangtt@mail.buct.edu.cn 
Abstract: The photocatalytic activity of in situ sulfur-doped g-C3N4 was improved by simple and green ball milling using thiourea as raw material. Its structure and optical properties were characterized by X-ray diffraction, scanning electron microscope, elemental analysis, X-ray photoelectron spectroscopy, UV-Vis diffuse reflectance spectroscopy and photoluminescence spectroscopy. The visible light photocatalytic performance of ball milled sulfur-doped g-C3N4 photocatalyst at different solvent ratios was evaluated with methylene blue as the target pollutant. The results show that the specific surface area and the number of reactive sites of the sulfur-doped g-C3N4 photocatalyst after wet ball milling are increased, and the band gap also increased appropriately, resulting in enhanced redox capacity. In addition, the surface defects of the sample after wet ball milling were reduced and the degree of polymerization was increased, which promoted the effective separation and transfer of photogenerated electron-holes. Therefore, the recombination rate can be lowered, and the degradation performance of the sulfur-doped g-C3N4 photocatalyst improved synergistically. The degradation rate of methylene blue in the wet ball milled sample was 1.5 and 3.6 times higher than that of the without ball milled sample and the dry ball milled sample, respectively.
Keywords: carbon nitride  sulfur doping  ball milling  visible light photocatalysis
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TAN Jie,LI Zhi-Feng,YANG Xiao-Fei,LI Jie,ZHANG Ting-Ting.Effect of Dry and Wet Environment of Ball Milling on Visible Light Catalytic Performance of Sulfur-Doped Carbon Nitride[J].Chinese Journal of Inorganic Chemistry,2020,36(3):475-484.
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Chinese Journal of Inorganic Chemistry