Insights into the improved photocatalytic performance of fluorine surface modified mpg-C3N4 at room temperature under aqueous conditions
Insights into the improved photocatalytic performance of fluorine surface modified mpg-C3N4 at room temperature under aqueous conditions
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氟表面改性mpg-C3N4在室温、水性条件下光催化性能改善的见解
DOI:
10.1016/j.apcata.2019.04.004
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发表时间:
2019-05
期刊:
影响因子:
--
通讯作者:
Ao Xia
中科院分区:
文献类型:
--
作者:
Mintao Xue;Guoqiang Tan;Ting Liu;Long Lv;Bin Li;Dan Zhang;Mingyue Dang;Huijun Ren;Ao Xia
A novel fluorine surface modified mesoporous carbon nitride (mpg-C3N4) photocatalysts were synthesized by etching SiO2with NH4HF2. The mechanism of formation and the factors that affect its photocatalytic activity were investigated. Interestingly, the introduction of F atoms improves the performance of surface state and widens the energy band gap of surface-modified mpg-C3N4due to the higher separation and efficient mobility of the photoinduced carriers. Consequently, the fluorine-modified mpg-C3N4exhibits higher carrier lifetime (8.64 ns) than mpg-C3N4(7.14 ns), which improves the photocatalytic efficiency under ultraviolet light. The enhanced photocatalytic activity was evaluated by studying the degradation experiments of Rhodamine B. It is expected that the present fluorine modification at the surface of mpg-C3N4may provide new insights in basic research and energy conversion.
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