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学科主题: Chemistry ; Engineering
题名: TiO2 supported on silica nanolayers derived from vermiculite for efficient photocatalysis
作者: Wang Lan; Wang Xu; Cui Sifang; Fan Xiaoyun; Zu Baiyi; Wang Chuanyi
关键词: TiO2 ; Immobilization ; Silica nanolayers ; Vermiculite ; Different acids ; Photocatalysis
刊名: CATALYSIS TODAY
发表日期: 2013
DOI: 10.1016/j.cattod.2013.06.026
卷: 216, 期:11, 页:95-103
收录类别: SCI
资助者: National Natural Science Foundation of China 21173261; "One Hundred Talents" program; "Cross-Cooperation Program for Creative Research Teams" of Chinese Academy of Sciences 1029471301; Western Light Program of Chinese Academy of Sciences XBBS201211; International Science & Technology Cooperation Program of Xinjiang Uygur Autonomous Region, China 20126017; "Western Light Joint Scholar" program of Chinese Academy of Sciences LHXZ201001
摘要: Various TiO2 composite photocatalysts were synthesized by immobilizing TiO2 nanoparticles onto the surface of silica nanolayers (SNLs) derived from vermiculite via a simple reaction between titanium hydrate and SNLs by varying Ti/SNLs ratios and using different acidic media (HCl, HNO3 and H2SO4). As-obtained composites were characterized by means of XRD, SEM and BET analytical techniques. The photocatalytic activities of photocatalysts were evaluated using methylene blue (MB) as a model pollutantin aqueous solution. It was found that the acidic media HCl and HNO3 favored the formation of tri-crystalline and flat spongy-like thin layers of TiO2 nanoparticles with large specific surface area giving excellent photocatalytic activity; while H2SO4 medium resulted in the single-phase of anatase TiO2 with ball-like aggregates on the TiO2 thin layer, giving relatively low photocatalytic activity. The excellent performance of the composites obtained using proper SNLs content and suitable acidic medium can be mainly ascribed to the mixed-phase structures with an optimum ratio and large specific surface area, as well as the facile immobilization of TiO2 on the support, which will be beneficial to their separation from water treatment system in practical application.
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内容类型: 期刊论文
URI标识: http://ir.xjipc.cas.cn/handle/365002/2629
Appears in Collections:环境科学与技术研究室_期刊论文

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作者单位: Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Key Lab Funct Mat & Devices Special Environm, Urumqi 830011, Peoples R China;Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Lab Green Chem & Organ Synth, Urumqi 830011, Peoples R China; Huazhong Univ Sci & Technol, Sch Opt & Elect Informat, Wuhan 430074, Peoples R China

Recommended Citation:
Wang Lan,Wang Xu,Cui Sifang,et al. TiO2 supported on silica nanolayers derived from vermiculite for efficient photocatalysis[J]. CATALYSIS TODAY,2013,216(11):95-103.
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