Filtration-enhanced highly efficient photocatalytic degradation with a novel electrospun rGO@TiO2 nanofibrous membrane: Implication for improving photocatalytic efficiency
Filtration-enhanced highly efficient photocatalytic degradation with a novel electrospun rGO@TiO2 nanofibrous membrane: Implication for improving photocatalytic efficiency
复制标题
新型电纺 rGO@TiO2 纳米纤维膜增强过滤的高效光催化降解：对提高光催化效率的意义
DOI：
10.1016/j.apcatb.2020.118737
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发表时间：
2020-07-05
影响因子：
22.1
通讯作者：
Huang, Xia
中科院分区：
文献类型：
--
作者：
Gao, Yifan;Yan, Ni;Huang, Xia
有机微污染物的降解迫切需要具有高级氧化功能的新型膜。本研究提出了一种新型的电纺rGO@TiO2纳米纤维（rGO@TiF）膜制备与连续的电纺煅烧方法。优化后的rGO-2@TiF_450膜在60 min内对普萘洛尔的去除率达到100%。结果表明，过滤条件下的降解效率是不过滤条件下的2.15倍。这种过滤引起的改善可能是由于反应物的传质增强和抑制电子-空穴复合，导致更实际的活性氧化自由基。由于过滤，膜内部的降解改善的比例被确定为类似于35%。此外，rGO@TiF膜的降解性能在10次降解循环中高度稳定，并且去除率比其他研究高2-10倍。
Novel membranes with advanced oxidation functions are urgently required for degradation of organic micropollutants. This study proposed a novel electrospun rGO@TiO2 nanofibrous (rGO@TiF) membrane fabricated with a successive electrospinning-calcination method. The optimized rGO-2@TiF_450 membrane achieved 100% removal of propranolol within 60 min. Systematic degradation experiments in different operational modes were conducted to reveal the enhancing mechanism of filtration on photocatalysis. The resulted degradation efficiency with filtration is up to 2.15 times as much as that without filtration. This filtration-induced improvement could be probably attributed to the enhanced mass transfer of the reactants and inhibited electron-hole recombination that resulted in more practically active oxidative radicals. The proportion of the improved degradation in membrane interior due to filtration was determined to be similar to 35%. Additionally, the degradation performance of the rGO@TiF membrane is highly stable over 10 degradation cycles and the removal rate was 2-10 times higher than other studies.