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Superstructure Ta2O5 mesocrystals derived from (NH4)2Ta2O3F6 mesocrystals with efficient photocatalytic activity†
Dalton Transactions ( IF 3.5 ) Pub Date : 2018-01-05 00:00:00 , DOI: 10.1039/c7dt04371f Xin Yu 1, 2, 3, 4, 5 , Wei Li 1, 2, 3, 4, 5 , Jian Huang 1, 2, 3, 4, 5 , Zhonghua Li 1, 2, 3, 4, 5 , Jiawen Liu 6, 7, 8, 9, 10 , PingAn Hu 1, 2, 3, 4, 5
Dalton Transactions ( IF 3.5 ) Pub Date : 2018-01-05 00:00:00 , DOI: 10.1039/c7dt04371f Xin Yu 1, 2, 3, 4, 5 , Wei Li 1, 2, 3, 4, 5 , Jian Huang 1, 2, 3, 4, 5 , Zhonghua Li 1, 2, 3, 4, 5 , Jiawen Liu 6, 7, 8, 9, 10 , PingAn Hu 1, 2, 3, 4, 5
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Superstructured mesocrystalline Ta2O5 nanosheets were successfully prepared from mesocrystalline (NH4)2Ta2O3F6 nanorods by the annealing method for the first time. The as-prepared mesocrystalline Ta2O5 nanosheets in this work showed remarkable visible light absorption, mainly due to the formation of oxygen vacancy defects in the mesocrystalline Ta2O5 nanosheets, which was also confirmed by XPS spectra, Raman spectra and EPR spectra. Besides, the mesocrystalline Ta2O5 nanosheets showed a highly enhanced photocatalytic activity of 11 268.24 μmol g−1 h−1, about 3.95 times that of commercial Ta2O5. Moreover, the specific surface area of the mesocrystalline Ta2O5-800 nanosheets was 16.34 m2 g−1, about 5.32 times that of the commercial Ta2O5 (3.072 m2 g−1). The valence band XPS spectra indicated a strong oxidizing ability of the mesocrystalline Ta2O5 nanosheets in comparison to that of commercial Ta2O5. The formation of superstructured Ta2O5 mesocrystals generated long lifetime carriers and effective conduction pathways, which greatly enhanced the photocatalytic activity for hydrogen production.
中文翻译：
由（NH 4）2 Ta 2 O 3 F 6介晶衍生的具有高效光催化活性的 Ta 2 O 5介晶上层结构†
首次通过退火方法由介晶（NH 4）2 Ta 2 O 3 F 6纳米棒成功制备了超结构介晶Ta 2 O 5纳米片。这项工作中制备的介晶Ta 2 O 5纳米片表现出显着的可见光吸收，这主要是由于在介晶Ta 2 O 5纳米片中形成了氧空位缺陷，这也由XPS光谱，拉曼光谱和EPR光谱证实。此外，介晶Ta 2 O 5纳米片表现出高度增强的11 268.24μmolg -1 h -1的光催化活性，约为商业Ta 2 O 5的3.95倍。此外，介晶Ta 2 O 5 -800纳米片的比表面积为16.34 m 2 g -1，约为商品Ta 2 O 5（3.072 m 2 g -1）的5.32倍。价带XPS光谱表明，与商业化的Ta 2 O 5相比，介晶的Ta 2 O 5纳米片具有较强的氧化能力。。Ta 2 O 5介晶结构的形成产生了长寿命的载流子和有效的传导途径，大大增强了光催化制氢的活性。
更新日期：2018-01-05
中文翻译：
由（NH 4）2 Ta 2 O 3 F 6介晶衍生的具有高效光催化活性的 Ta 2 O 5介晶上层结构†
首次通过退火方法由介晶（NH 4）2 Ta 2 O 3 F 6纳米棒成功制备了超结构介晶Ta 2 O 5纳米片。这项工作中制备的介晶Ta 2 O 5纳米片表现出显着的可见光吸收，这主要是由于在介晶Ta 2 O 5纳米片中形成了氧空位缺陷，这也由XPS光谱，拉曼光谱和EPR光谱证实。此外，介晶Ta 2 O 5纳米片表现出高度增强的11 268.24μmolg -1 h -1的光催化活性，约为商业Ta 2 O 5的3.95倍。此外，介晶Ta 2 O 5 -800纳米片的比表面积为16.34 m 2 g -1，约为商品Ta 2 O 5（3.072 m 2 g -1）的5.32倍。价带XPS光谱表明，与商业化的Ta 2 O 5相比，介晶的Ta 2 O 5纳米片具有较强的氧化能力。。Ta 2 O 5介晶结构的形成产生了长寿命的载流子和有效的传导途径，大大增强了光催化制氢的活性。
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