Nanchang Hangkong University

About: Nanchang Hangkong University is a education organization based out in Nanchang, China. It is known for research contribution in the topics: Microstructure & Alloy. The organization has 7004 authors who have published 5270 publications receiving 62162 citations. The organization is also known as: Nanchang Aviation University.

One-pot solvothermal syntheses of ternary heterostructured TiO2-Bi2MoO6/Bi3.64Mo0.36O6.55 controllable in terms of composition, morphology and structure: Materials of high visible-light driven photocatalytic activity

Abstract: Novel ternary heterostructured TiO 2 –Bi 2 MoO 6 /Bi 3.64 Mo 0.36 O 6.55 were synthesized by a one-pot template-free solvothermal method. For comparison studies, Bi 2 MoO 6 , Bi 3.64 Mo 0.36 O 6.55 , Bi 2 MoO 6 /Bi 3.64 Mo 0.36 O 6.55 , TiO 2 –Bi 2 MoO 6 , and TiO 2 –Bi 3.64 Mo 0.36 O 6.55 were also synthesized likewise. The photocatalysts were characterized by powder X-ray diffraction, UV–vis diffuse reflectance spectroscopy, scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy. The experimental results showed that the composition, morphology and structure of the photocatalysts can be well controlled by adjusting the pH value, alcohol/water ratio, and TiO 2 content. Based on the findings, we put forward a mechanism for the formation of the materials. Furthermore, the results of photocatalytic degradation of Rhodamine B (RhB) and o-nitrophenol over the as-prepared materials indicate that photocatalytic efficiency can be closely related to the composition, morphology and structure of the materials. The ternary heterostructured 5%TiO 2 –Bi 2 MoO 6 /Bi 3.64 Mo 0.36 O 6.55 exhibits good visible-light driven photocatalytic activity in the degradation of RhB and o-nitrophenol, much higher than those of TiO 2 , Bi 2 MoO 6 , Bi 3.64 Mo 0.36 O 6.55 , and any combination of the three. Finally, a new mechanism for the photocatalytic action of the heterostructured materials was put forward. Overall, the investigation provides a new reaction mode to explain the effective interfacial charge transfer and the significant improvement in photocatalytic efficiency of the ternary heterostructured composites.

Toward charge extraction in all-inorganic perovskite solar cells by interfacial engineering

Abstract: All-inorganic perovskite solar cells (PSCs) are a promising solution to address the poor stability of organic–inorganic hybrid PSC devices under humidity and thermal attacks. However, the severe interfacial charge recombination from large energy differences has markedly limited the further enhancement of power conversion efficiency. The charge extraction from perovskite layer has been improved by setting intermediate energy levels using quantum dots (QDs) through interfacial engineering. In the current study, CuInS2/ZnS QDs with tunable bandgaps and hole-transporting behavior were prepared to modify the CsPbBr3/carbon interface. Arising from the improved charge separation, a power conversion efficiency of 8.42% was achieved for QD tailored inorganic PSC in comparison with 6.01% for pristine devices. These all-inorganic PSCs present unprecedented stability under high humidity and significant improvements in the fill factor, short-circuit photocurrent, and open-circuit voltage.