Journal ArticleDOI
Efficient photocatalytic nitrogen fixation under ambient conditions enabled by the heterojunctions of n-type Bi2MoO6 and oxygen-vacancy-rich p-type BiOBr.
Xiaolan Xue,Renpeng Chen,Changzeng Yan,Yi Hu,Wenjun Zhang,Songyuan Yang,Lianbo Ma,Guoyin Zhu,Zhong Jin +8 more
TLDR
Benefiting from these merits, the Bi2MoO6/OV-BiOBr heterojunctions exhibit improved photocatalytic performance for N2 conversion to ammonia without any noble metal co-catalysts and sacrificial reagents under ambient conditions.Abstract:
N2 fixation is one of the most important chemical reactions in the ecosystem of our planet. However, the industrial Haber-Bosch ammonia synthesis process is restricted by harsh reaction conditions (350-550 °C, 150-350 atm) and undesirable environmental effects (a large amount of CO2 emission). Photocatalytic N2 fixation is promising for achieving sustainable ammonia synthesis under ambient conditions with lower energy input and less environmental issues. However, the known photocatalysts for N2 reduction under mild conditions still face the great challenge of very low energy conversion efficiency. Herein, we report a facile solution-phase method to prepare the heterojunctions based on n-type Bi2MoO6 nanorods and oxygen-vacancy-rich p-type BiOBr nanosheets (Bi2MoO6/OV-BiOBr). Originating from the formation of p-n junctions and suitable bandgap configuration, the Bi2MoO6/OV-BiOBr heterojunctions exhibit effective light utilization and photogenerated electron-hole separation properties. Moreover, it is confirmed that the oxygen vacancies on BiOBr nanosheets are propitious to the adsorption and activation of N2 molecules. Benefiting from these merits, the Bi2MoO6/OV-BiOBr heterojunctions exhibit improved photocatalytic performance for N2 conversion to ammonia without any noble metal co-catalysts and sacrificial reagents under ambient conditions.read more
Citations
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Selective photocatalytic N₂ fixation dependent on g-C₃N₄ induced by nitrogen vacancies
TL;DR: In this article, the authors determined that nitrogen vacancies (NVs) could endow graphitic carbon nitride (g-C₃N₄) with the photocatalytic N₂ fixation ability.
Journal ArticleDOI
MXenes as noble-metal-alternative co-catalysts in photocatalysis
TL;DR: In this paper, the authors focus on the latest advancements in research on MXenes as co-catalysts in relatively popular photocatalytic applications (hydrogen production, CO2 reduction, nitrogen fixation, and organic pollutant oxidation).
Journal ArticleDOI
The fabrication of 1D/2D CdS nanorod@Ti3C2 MXene composites for good photocatalytic activity of hydrogen generation and ammonia synthesis
Benteng Sun,Pengyuan Qiu,Zhangqian Liang,Yanjun Xue,Xiaoli Zhang,Lei Yang,Hongzhi Cui,Jian Tian +7 more
TL;DR: In this paper, a unique 1D/2D CdS nanorod@Ti3C2 MXene composites photocatalysts are prepared by a hydrothermal strategy.
Journal ArticleDOI
Alkali Etching of Layered Double Hydroxide Nanosheets for Enhanced Photocatalytic N 2 Reduction to NH 3
Yunxuan Zhao,Lirong Zheng,Run Shi,Shuai Zhang,Xuanang Bian,Fan Wu,Xingzhong Cao,Geoffrey I. N. Waterhouse,Tierui Zhang +8 more
Journal ArticleDOI
Highly dispersive and stable Fe3+ active sites on 2D graphitic carbon nitride nanosheets for efficient visible-light photocatalytic nitrogen fixation
TL;DR: In this paper, the authors covalently grafted an ethylenediaminetetraacetic acid (EDTA) motif onto graphitic carbon nitride nanosheets (CNNS) by a high-temperature dehydration reaction, and subsequently chelated Fe3+ ions to obtain highly dispersive and stable Fe 3+ sites on CNNS.
References
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Journal ArticleDOI
Efficient Visible Light Nitrogen Fixation with BiOBr Nanosheets of Oxygen Vacancies on the Exposed {001} Facets
TL;DR: It is demonstrated that efficient fixation of N2 to NH3 can proceed under room temperature and atmospheric pressure in water using visible light illuminated BiOBr nanosheets of oxygen vacancies in the absence of any organic scavengers and precious-metal cocatalysts.
Journal ArticleDOI
Oxygen vacancy induced band-gap narrowing and enhanced visible light photocatalytic activity of ZnO.
Junpeng Wang,Zeyan Wang,Baibiao Huang,Yandong Ma,Yuanyuan Liu,Xiaoyan Qin,Xiaoyang Zhang,Ying Dai +7 more
TL;DR: The ZnO with oxygen vacancies are found to be efficient for photodecomposition of 2,4-dichlorophenol under visible light irradiation and a narrowing bandgap can be confirmed by the enhancement of the photocurrent response when theZnO was irradiated with visible light.
Journal ArticleDOI
Rational design of electrocatalysts and photo(electro)catalysts for nitrogen reduction to ammonia (NH3) under ambient conditions
TL;DR: In this article, the rational design of electrocatalysts and photo(electro) catalysts for N2 reduction to NH3 under ambient conditions is highlighted, with a special emphasis on the relationship between their physicochemical properties and NH3 production performance.
Journal ArticleDOI
Ammonia synthesis using a stable electride as an electron donor and reversible hydrogen store
Masaaki Kitano,Yasunori Inoue,Youhei Yamazaki,Fumitaka Hayashi,Shinji Kanbara,Satoru Matsuishi,Toshiharu Yokoyama,Sung Wng Kim,Sung Wng Kim,Michikazu Hara,Hideo Hosono +10 more
TL;DR: Kinetic analysis with infrared spectroscopy reveals that C12A7:e(-) markedly enhances N(2) dissociation on Ru by the back donation of electrons and that the poisoning of ruthenium surfaces by hydrogen adatoms can be suppressed effectively because of the ability of C12 a7: e(-) to store hydrogen reversibly.
Journal ArticleDOI
Engineering BiOX (X = Cl, Br, I) nanostructures for highly efficient photocatalytic applications
TL;DR: Recent advances and emerging strategies in tailoring BiOX (X = Cl, Br, I) nanostructures to boost their photocatalytic properties are surveyed.
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