化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (10) : 171-176.

科学研究

改性煤矸石/TiO₂光催化剂的制备及其光催化性能研究

张晓婉, 李巧玲

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Preparation and photocatalytic property of mCG/TiO₂ photocatalyst

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Received		Published
2019-04-03		2019-10-20
Issue Date	Revised Date
2019-11-09	2019-04-03

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摘要

采用溶胶-凝胶法,以盐酸蚀刻煤矸石(mCG)为吸附剂,制备了煤矸石复合TiO₂光催化剂(mCG/TiO₂)。采用扫描电镜、透射电镜、红外光谱、X射线衍射和紫外-可见漫反射对复合材料进行表征。以罗丹明B为模拟污染物,考察了制备条件对其光催化活性的影响,结果表明:当mCG质量含量为15%,在500℃下煅烧2h得到的mCG/TiO₂复合材料对罗丹明B光催化降解率最高,在紫外光照射下,75min内对初始浓度为10mg/L的罗丹明B降解率达到97.3%;可见光下180min内降解率达到90.24%。活性物质捕获实验证明·OH为光催化体系的主要活性物质。

Abstract

Modified Coal gangue/TiO₂ photocatalyst (mCG/TiO₂) was prepared by sol-gel method etched by hydrochloric acid (modified coal gangue,mCG).The composite photocatalyst was characterized by SEM,TEM,FT-IR,XRD and UV diffuse reflectance.The effect of preparation conditions on the activity was researched by photo-degradation of rhodamine B (RhB) under ultraviolet light and visible light.The results shown that the mCG/TiO₂ prepared with 15wt% of mCG and calcined 2h at 500℃ performed the highest photocatalytic degradation rate for RhB.The degradation rate was 97.3% in 75min under ultraviolet light irradiation,while the degradation rate was 90.24% in 180min irradiated with visible light.The active material capture experiment proved ·OH was the main active substance in the photocatalytic system.

关键词

TiO₂ / 改性煤矸石 / 溶胶-凝胶法 / 光催化 / 可见光

Key words

titanium dioxide / modified coal gangue / sol-gel method / photocatalysis / visible light

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张晓婉, 李巧玲. 改性煤矸石/TiO₂光催化剂的制备及其光催化性能研究[J]. 化工新型材料, 2019, 47(10): 171-176 DOI:

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参考文献

原文顺序 | 出版日期 | 本文引用

[1] Ahmadi M,Ramezani M H,Jaafarzadeh N,et al.Enhanced photocatalytic degradation of tetracycline and real pharmaceutical wastewater using MWCNT/TiO₂ nano-composite[J].Journal of Environmental Management,2017,186(1):55-63.
[2] Ya Jing,Hu Fengjiao,Yang Ningning,et al.Fabrication of TiO₂ nanotube arrays with high length to diameter ratio in electrolyte containing trace amount of water[J].Chin J Inorg Chem,2014,30(11):2523-2529.
[3] Feng C,Aldrich C,Eksteen J J,et al.Removal of arsenic from alkaline process waters of gold cyanidation by use of Fe₃O₄@SiO₂@TiO₂ nanosorbents[J].Minerals Engineering,2017,110(4):40-46.
[4] Li H,Gao Y,Wu X,et al.Fabrication of heterostructured g-C₃N₄/Ag-TiO₂ hybrid photocatalyst with enhanced performance in photocatalytic conversion of CO₂ under simulated sunlight irradiation[J].Applied Surface Science,2017,402(7):198-207.
[5] Oros-Ruiz S,Zanella R,Prado B.Photocatalytic degradation of trimethoprim by metallic nanoparticles supported on TiO₂-P25[J].Journal of Hazardous Materials,2013,263(5):28-35.
[6] Nowotny M K,Sheppard L R,Bak A,et al.Defect chemistry of titanium dioxide.application of defect engineering in processing of TiO₂-based photocatalysts[J].Cheminform,2008,112(14):5275-5300.
[7] Li X,Xie Q,Kutal C.Synthesis and photocatalytic properties of quantum confined titanium dioxide nanoparticle[J].Scripta Materialia,2004,50(4):499-505.
[8] Aghajari N,Yones H,Bahramifa N,et al.Photocatalytic removal of reactive red 198 from aqueous solution using titanium dioxide photocatalyst supported on Fe-ZSM-5 zeolite[J].Journal of Mazandaran University of Medical Sciences,2017,150(27):137-157.
[9] Cao L,Xie D,Qu Y,et al.Preparation of activated carbon (AC)-loaded TiO₂ adsorbent[J].Rare Metals,2011,30(1):217-220.
[10] Mohd Nor N U,Lintang H O,Endud S,et al.Photocatalytic oxidation of hexanol over titanium dioxide supported on mesoporous lica[J].Advanced Materials Research,2015,1112(7):176-179.
[11] Joshi M M,Labhsetwar N K,Parwate D V,et al.Efficient photocatalytic hydrogen generation by silica supported and platinum promoted titanium dioxide[J].Materials Research Bulletin,2013,48(9):3545-3552.
[12] Li Z,Yao C,Wang Y C,et al.High-density platinum nanoparticle-decorated titanium dioxide nanofiber networks for efficient capillary photocatalytic hydrogen generation[J].Journal of Materials Chemistry A,2016,30(4):11672-11679.
[13] Li D,Wu D,Xu F,et al.Literature overview of Chinese research in the field of better coal utilization[J].Journal of Cleaner Production,2018,185(13):959-980.
[14] Gao Y,Huang H,Tang W,et al.Preparation and characterization of a novel porous silicate material from coal gangue[J].Microporous & Mesoporous Materials,2015,217(11):210-218.
[15] Du Hong,Ma Liang,Liu Xiaoyao,et al.A novel mesoporous SiO₂ material with MCM-41 structure from coal gangue:preparation,ethylenediamine modification,and adsorption properties for CO₂ capture[J].Energy Fuels,2018,32(4):5374-5385.
[16] 李燕,杨旭光,曹林林.Bi₂S₃-BiOCl/煤矸石复合光催化剂的制备及光催化性能[J].复合材料学报,2017,34(8):1847-1852.
[17] 李燕,孙道胜,王爱国,等.CdS/煤矸石复合粉的声化学法制备及光催化性能[J].人工晶体学报,2015,44(3):717-721.
[18] 李永峰.煤矸石热活化及影响因素的研究[D].太原:中国日用化学工业研究院,2007.