期刊
ULTRASONICS SONOCHEMISTRY
卷 53, 期 -, 页码 1-10出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2018.12.009
关键词
Ultrasound; Titanium dioxide; Indium vanadate; rGO; H2 evolution; Water-splitting
资金
- Ministry of New and Renewable Energy (MNRE), India [103/239/2015-NT]
- Science and Engineering Research Board Department of Science and Technology (SERB-DST), New Delhi, India [EMR/2014/000645]
Herein, a ternary nanocomposite, comprising metal oxide (InVO4 and TiO2) photocatalysts supported on rGO sheets was prepared via the hydrothermal method in the presence and absence of ultrasound irradiation. The photocatalytic performance of the prepared rGO/InVO4-TiO2 nanocomposites was evaluated for H-2 evolution activity from water splitting with glycerol as a sacrificial agent. Interestingly, a synergistic effect (6-fold) was observed with rGO/InVO4-TiO2 nanocomposite prepared with the help of ultrasound compared to the samples prepared without ultrasound. The optimized nanocomposite (rGO/InVO4-TiO2) exhibited a maximum H-2 evolution of 1669 pmol h(-1), a similar to 13-fold enhancement compared to the bare TiO2. This remarkable enhancement is mainly due to the synergistic effect induced by ultrasonic irradiation along with the shifting of the optical band gap of TiO2 from 3.20 eV to 2.80 eV by loading of InVO4 and rGO and also strong chemical bonding between metal (Ti) and C through Ti-C bond formation, as identified by UV-vis DRS spectra and XPS spectra, respectively. Moreover, a significant quenching of PL emission intensity and smaller radius arc of the Nyquist plot in the EIS were observed when the rGO and InVO4 were loaded in TiO2, indicating the efficient charge carriers separation and transfer in the presence of rGO sheet, resulting in enhanced photocatalytic activity. Thus, application of ultrasound has played significant and important roles in substantially enhancing hydrogen evolution along with rGO and InVO4 acting as support and co-catalyst, respectively.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据