自2016年被发现以来,铋烯作为一种新兴的二维材料,因其独特光学和电子特性而迅速受到研究者欢迎。理论和实验研究都证实了其卓越的半导体性能,包括可调的带隙、高载流子迁移率和优越的半导体性光响应,在许多领域具有实际应用前景。近年...自2016年被发现以来,铋烯作为一种新兴的二维材料,因其独特光学和电子特性而迅速受到研究者欢迎。理论和实验研究都证实了其卓越的半导体性能,包括可调的带隙、高载流子迁移率和优越的半导体性光响应,在许多领域具有实际应用前景。近年来越来越多的相关工作报道了半导体铋烯与光子的相互作用在纳米光子应用中具有重要潜力。本文综述了二维铋烯的可控制备、能带结构以及拉曼性质,并综述了铋烯的最新光子学应用研究进展,包括光电探测器、光调制器、光传感器、肿瘤治疗和光催化。最后,本文从制备方法和实际应用的角度出发对铋烯做出了总结和展望。Since its discovery in 2016, Bismuthene as an emerging two-dimensional material has drawn extensive interest due to its unique optical and electronic properties. Both theoretical and experimental studies have demonstrated its excellent semiconducting properties, including adjustable band gap, high carrier mobility and superior semiconductive photoresponse, which holds great practical prospects in many fields. In recent years, many researches have focused on the interaction between semiconducting Bismuthene and photons that play an important role in nanophotonic applications. In this review, the controllable preparation, band structure and Raman properties of two-dimensional Bismuthene are briefly reviewed, and the latest advances in photonics applications (e.g., photodetectors, optical modulators, optical sensors, cancer therapy and photocatalysis) of Bismuthene are discussed. Finally, the summary and perspectives of the Bismuthene are presented from the point of view of preparation strategy and practical applications.展开更多
Graphene‐supported BiFeO3 (rG‐BiFeO3) was synthesized by the hydrothermal method and used for the efficient removal of ammonia under visible light. X‐ray diffraction, transmission electron microscopy,Fourier transf...Graphene‐supported BiFeO3 (rG‐BiFeO3) was synthesized by the hydrothermal method and used for the efficient removal of ammonia under visible light. X‐ray diffraction, transmission electron microscopy,Fourier transform infrared spectroscopy, Raman spectroscopy, and ultraviolet‐visiblediffuse reflectance spectroscopy were conducted to characterize the rG‐BiFeO3. The specific surfacearea of the rG‐BiFeO3 catalyst was 48.6 m2/g, larger than that of BiFeO3 (21.0 m2/g). When used as aheterogeneous photocatalyst, rG‐BiFeO3 achieved 91.20% degradation of a NH3‐N solution (50mg/L) at pH = 11 under visible‐light irradiation in the absence of hydrogen peroxide. The degradationof ammonia followed pseudo‐first‐order kinetics, and the catalyst retained high photocatalyticactivity after seven reaction cycles. Study of the mechanism showed that the holes, superoxide anion radicals, and hydroxyl radicals, arising from the synergy between graphene and BiFeO3, oxidized NH3 directly to N2.展开更多
The role of bismuth in the selective oxidation of propene has long been debated. We performed density functional calculations to study the dehydrogenation reaction of propene on Bi203 surfaces. Our calculated thermody...The role of bismuth in the selective oxidation of propene has long been debated. We performed density functional calculations to study the dehydrogenation reaction of propene on Bi203 surfaces. Our calculated thermodynamic data reveal that the first dehydrogenation of propene on the most stable （010） surface and the （100） surface are difficult. Our calculations indicate that the barrier of the first hydrogen abstraction on the high Miller index surface （211） is much lower than those on the （100） and （010） surfaces, and is close to the experimental one. Further dehydrogenation is shown to be difficult and production of 1,5-hexadiene through dimerization of allyl is likely, in agreement with the experimental observations.展开更多
文摘自2016年被发现以来,铋烯作为一种新兴的二维材料,因其独特光学和电子特性而迅速受到研究者欢迎。理论和实验研究都证实了其卓越的半导体性能,包括可调的带隙、高载流子迁移率和优越的半导体性光响应,在许多领域具有实际应用前景。近年来越来越多的相关工作报道了半导体铋烯与光子的相互作用在纳米光子应用中具有重要潜力。本文综述了二维铋烯的可控制备、能带结构以及拉曼性质,并综述了铋烯的最新光子学应用研究进展,包括光电探测器、光调制器、光传感器、肿瘤治疗和光催化。最后,本文从制备方法和实际应用的角度出发对铋烯做出了总结和展望。Since its discovery in 2016, Bismuthene as an emerging two-dimensional material has drawn extensive interest due to its unique optical and electronic properties. Both theoretical and experimental studies have demonstrated its excellent semiconducting properties, including adjustable band gap, high carrier mobility and superior semiconductive photoresponse, which holds great practical prospects in many fields. In recent years, many researches have focused on the interaction between semiconducting Bismuthene and photons that play an important role in nanophotonic applications. In this review, the controllable preparation, band structure and Raman properties of two-dimensional Bismuthene are briefly reviewed, and the latest advances in photonics applications (e.g., photodetectors, optical modulators, optical sensors, cancer therapy and photocatalysis) of Bismuthene are discussed. Finally, the summary and perspectives of the Bismuthene are presented from the point of view of preparation strategy and practical applications.
基金supported by the National Natural Science Foundation of China (21347006, 21576175, 51478285, 51403148)the Opening Project of Key Laboratory of Jiangsu Province Environmental Science and Engineering of Suzhou University of Science and Technology (zd131205)the Collaborative Innovation Center of Technology and Material of Water Treatment~~
文摘Graphene‐supported BiFeO3 (rG‐BiFeO3) was synthesized by the hydrothermal method and used for the efficient removal of ammonia under visible light. X‐ray diffraction, transmission electron microscopy,Fourier transform infrared spectroscopy, Raman spectroscopy, and ultraviolet‐visiblediffuse reflectance spectroscopy were conducted to characterize the rG‐BiFeO3. The specific surfacearea of the rG‐BiFeO3 catalyst was 48.6 m2/g, larger than that of BiFeO3 (21.0 m2/g). When used as aheterogeneous photocatalyst, rG‐BiFeO3 achieved 91.20% degradation of a NH3‐N solution (50mg/L) at pH = 11 under visible‐light irradiation in the absence of hydrogen peroxide. The degradationof ammonia followed pseudo‐first‐order kinetics, and the catalyst retained high photocatalyticactivity after seven reaction cycles. Study of the mechanism showed that the holes, superoxide anion radicals, and hydroxyl radicals, arising from the synergy between graphene and BiFeO3, oxidized NH3 directly to N2.
基金supported by the National Basic Research Program of China(2011CB808604)the National Natural Science Foundation of China(21273103)
文摘The role of bismuth in the selective oxidation of propene has long been debated. We performed density functional calculations to study the dehydrogenation reaction of propene on Bi203 surfaces. Our calculated thermodynamic data reveal that the first dehydrogenation of propene on the most stable （010） surface and the （100） surface are difficult. Our calculations indicate that the barrier of the first hydrogen abstraction on the high Miller index surface （211） is much lower than those on the （100） and （010） surfaces, and is close to the experimental one. Further dehydrogenation is shown to be difficult and production of 1,5-hexadiene through dimerization of allyl is likely, in agreement with the experimental observations.
