journal article·2021-12-27

Heterostructure-Induced Light Absorption and Charge-Transfer Optimization of a TiO2 Photoanode for Photoelectrochemical Water Splitting

Qinghua Yi, Shan Cong, Hao Wang, Xinjie Zhou, Jianmei Chen, Ke Li, Yushen Liu, Jong-Min Lee

ACS Applied Energy Materials· Volume 4· Issue 12
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Abstract

Rutile titanium dioxide (TiO2) exhibits excellent photoelectrochemical properties but limited photocatalytic performance due to its large band gap and fast electron–hole recombination. Here, we report a composite catalyst of NiTiO3 nanoparticle-coated TiO2 nanorod arrays (NiTiO3/TiO2 NRAs) via an electrostatic assembly strategy. The NiTiO3/TiO2 heterostructure endows an enlarged absorption range and enhanced electron–hole separation efficiency. When being used as an electrode in photoelectrochemical water splitting, it achieves the highest photocurrent density of 1.94 mA cm–2 at 1.0 V versus reversible hydrogen electrode, which is 3.74 times higher than the photocurrent density of pristine rutile TiO2 NRAs (0.51 mA cm–2). The heterostructure engineering strategy is demonstrated to enhance the photoelectrochemical performance, which can be extended to optimize various semiconductor photocatalysts.
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Research context

OpenAlex topics: Advanced Photocatalysis Techniques · Copper-based nanomaterials and applications · Electronic and Structural Properties of Oxides

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Electronic and Information Engineering, Changshu Institute of Technology and Jiangsu Laboratory of Advanced Functional Materials, Changshu 215500, China

School of Chemical and Biomedical Engineering, Nanyang Technological University, 637459, Singapore

College of Electronic and Optical Engineering & College of Microelectronics, Nanjing University of Posts and Telecommunications, Nanjing 210023, China

School of Chemistry, Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials and Bioengineering Research (AMBER), Trinity College Dublin, Dublin D02 PN40, Ireland

Funding

Natural Science Foundation of Jiangsu Province · National Natural Science Foundation of China · Suzhou Science and Technology Project · Natural Science Foundation of the Jiangsu Higher Education Institutions of China

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