Bismuth oxychloride(BiOCl)square microplates were prepared via a facile hydrothermal method.The X-ray diffraction patterns of the samples reveal a tetragonal BiOCl phase,and the scanning electron microscopy images sho...Bismuth oxychloride(BiOCl)square microplates were prepared via a facile hydrothermal method.The X-ray diffraction patterns of the samples reveal a tetragonal BiOCl phase,and the scanning electron microscopy images show plate-like structures with large lateral size of 3~6μm and thickness in the range of 100~300 nm.The effects of surfactant,reaction temperature and duration on the morphology of BiOCl powders are systematically in-vestigated.The polar behavior of a BiOCl single-crystalline microplate is examined by using piezoresponse force microscopy evidenced over 80 pm displacement under 40 V bias voltage.In addition,the photoelectric performance of the BiOCl microplates is evaluated by using electrochemical workstation with three-electrode system,and large photocurrent densities(over 0.5μA/cm^(2))and fast photoresponse(0.7~1.1 s)are detected by applying both 365 nm monochromatic light and sunlight illumination.The surface potential changes of BiOCl microplate under different light condition,characterized by in-situ Kelvin probe force microscopy,further verify the separation ability of the photo-induced charge carriers.These findings would be beneficial for further design photocatalytic and piezocatalytic materials.展开更多
基金supported by the National Natural Science Foundation of China (Nos. 51872311, 51902331 and 11974250)the Shanghai International Science and Technology Cooperation Fund Project (No. 18520723200)+1 种基金the Science and Technology Commission of Shanghai Municipality (Nos. 19070502800 and 19ZR1464900)the Frontier Science Key Project of the Chinese Academy of Sciences (QYZDB-SSW-JSC027)
文摘Bismuth oxychloride(BiOCl)square microplates were prepared via a facile hydrothermal method.The X-ray diffraction patterns of the samples reveal a tetragonal BiOCl phase,and the scanning electron microscopy images show plate-like structures with large lateral size of 3~6μm and thickness in the range of 100~300 nm.The effects of surfactant,reaction temperature and duration on the morphology of BiOCl powders are systematically in-vestigated.The polar behavior of a BiOCl single-crystalline microplate is examined by using piezoresponse force microscopy evidenced over 80 pm displacement under 40 V bias voltage.In addition,the photoelectric performance of the BiOCl microplates is evaluated by using electrochemical workstation with three-electrode system,and large photocurrent densities(over 0.5μA/cm^(2))and fast photoresponse(0.7~1.1 s)are detected by applying both 365 nm monochromatic light and sunlight illumination.The surface potential changes of BiOCl microplate under different light condition,characterized by in-situ Kelvin probe force microscopy,further verify the separation ability of the photo-induced charge carriers.These findings would be beneficial for further design photocatalytic and piezocatalytic materials.
