碳纳米管贯穿的（001）面暴露的二氧化钛在光催化氧化一氧化氮方面具有高活性。
CNTs threaded (001) exposed TiO2 with high activity in photocatalytic NO oxidation.
作者信息
Xiao Shuning, Zhu Wei, Liu Peijue, Liu Fanfan, Dai Wenrui, Zhang Dieqing, Chen Wei, Li Hexing
机构信息
Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, International Joint Lab on Resource Chemistry SHNU-NUS-PU, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China and Department of Chemistry and Department of Physics, National University of Singapore, 3 Science Drive 3, 117543, Singapore.
Education Ministry Key Lab of Resource Chemistry, Shanghai Key Laboratory of Rare Earth Functional Materials, International Joint Lab on Resource Chemistry SHNU-NUS-PU, Department of Chemistry, Shanghai Normal University, Shanghai 200234, China.
出版信息
Nanoscale. 2016 Feb 7;8(5):2899-907. doi: 10.1039/c5nr07589k.
A microwave-ionothermal strategy was developed for in situ synthesis of CNTs threaded TiO2 single crystal with a tunable percentage of surface exposed (001) active facets. The CNTs were used as microwave antennas to create local "super hot" dots to induce Ti(3+) adsorption and hydrolysis, thereby leading to a good assembly of (001) facets exposed single crystalline TiO2 threaded by the CNTs in the presence of Hmim[BF4] ionic liquid. Due to the high percentage of the active (001) facets of single crystal TiO2 and the direct electron transfer property of the CNTs, the as-prepared CNTs-TiO2 composite showed a photocatalytic NO removal ratio of up to 76.8% under UV irradiation. In addition, with self-doped Ti(3+), the CNTs-TiO2 composite also exhibited an enhanced activity under irradiation with either solar lights or visible lights, showing good potential in practical applications for environmental remediation.
开发了一种微波-离子热策略，用于原位合成具有可调表面暴露（001）活性面百分比的碳纳米管贯穿的TiO₂单晶。碳纳米管用作微波天线以产生局部“超热点”，诱导Ti(3+)吸附和水解，从而在Hmim[BF₄]离子液体存在下，使碳纳米管贯穿的（001）面暴露的单晶TiO₂实现良好组装。由于单晶TiO₂的活性（001）面比例高以及碳纳米管的直接电子转移特性，所制备的碳纳米管-TiO₂复合材料在紫外光照射下表现出高达76.8%的光催化NO去除率。此外，由于具有自掺杂的Ti(3+)，碳纳米管-TiO₂复合材料在太阳光或可见光照射下也表现出增强的活性，在环境修复的实际应用中显示出良好的潜力。
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