Hong Wang, Yunfei Ma, Chongyang Zhao, JinKun Bai, Kangrong Lai
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引用次数: 0
Abstract
Based on the first-principles density-functional theory, formation energies, transition energy levels of M (M = Mo, W) doped α-BiNbO4 systems are studied. The calculation results show that the donor defects form easily under Bi-rich condition. Of these, the Wint (W interstitial) and Moint (Mo interstitial) are the two main defects that lead to n-type conductivity. Then, the electronic structures of M-mono-doped and M/Ovac (O vacancy)-codoped α-BiNbO4 were investigated. Our results show that the band gap of Wint/Ovac-codoped α-BiNbO4 is reduced by 0.43 eV, and the conduction band minimum and valence band maximum are reduced by 0.20 and 0.23 eV, respectively, compared to pure α-BiNbO4, with less driving force required for the redox reaction process and then an increased redox rate. The α-BiNbO4 with Wint+Ovac defects with n-type conductivity has good photocatalytic activity in water splitting.
期刊介绍：
Catalysis Letters aim is the rapid publication of outstanding and high-impact original research articles in catalysis. The scope of the journal covers a broad range of topics in all fields of both applied and theoretical catalysis, including heterogeneous, homogeneous and biocatalysis.
The high-quality original research articles published in Catalysis Letters are subject to rigorous peer review. Accepted papers are published online first and subsequently in print issues. All contributions must include a graphical abstract. Manuscripts should be written in English and the responsibility lies with the authors to ensure that they are grammatically and linguistically correct. Authors for whom English is not the working language are encouraged to consider using a professional language-editing service before submitting their manuscripts.
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