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您的检索式：作者名="Chengdong Su"
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| 1 | Effects of high temperature on the microstructure and mechanical behavior of hard coal显示文摘Coal is a common porous sedimentary rock whose microstructure and mechanical behavior are often affected by high temperature.In order to deeply investigate the effect of high temperature on the structure and mechanical properties of coal,six groups of coal samples with different heating temperatures were prepared.Various testing methods,including ultrasonic test,scanning electron microscopy,nuclear magnetic resonance and uniaxial compression test,were used in this study.The results showed that the physical and chemical change processes of coal samples under high temperature can be divided into two stages:the stage of drying and degassing and the stage of pyrolysis of the coal matrix.With the increase of heating temperature,the total porosity of coal samples increases,while the integrity and the deformation resistance of coal samples decrease.In addition,the elastic modulus and uniaxial compressive strength of the coal sample decrease with the increase of heating temperature.The Poisson’s ratio decreases firstly and then increases with the increase of heating temperature. | Chengdong Su Jiadong Qiu Qiuhong Wu Lei Weng | 2020 | International Journal of Mining Science and Technology2020，30，5： | 11 |
| 2 | Remarkably enhanced piezo-photocatalytic performance in BaTiO_(3)/CuO heterostructures for organic pollutant degradation显示文摘Introducing polarization field of piezoelectric materials is an effective strategy to improve photocatalytic performance.In this study,a new type of BaTiO_(3)/CuO heterostructure catalyst was designed and synthesized to achieve high piezo-photocatalytic activity through the synergy of heterojunction and piezoelectric effect.The BaTiO_(3)/CuO heterostructure shows a significantly enhanced piezo-photocatalytic degradation efficiency of organic pollutants compared with the individual BaTiO_(3) nanowires(NWs)and CuO nanoparticles(NPs).Under the co-excitation of ultrasonic vibration and ultraviolet radiation,the optimal degradation reaction rate constant k of polarized BaTiO_(3)/CuO heterostructure on methyl orange(MO)dye can reach 0.05 min^(−1),which is 6.1 times of photocatalytic rate and 7 times of piezocatalytic rate.The BaTiO_(3)/CuO heterostructure with remarkable piezo-photocatalytic behavior provides a promising strategy for the development of high-efficiency catalysts for wastewater purification,and it also helps understand the coupling mechanism between piezoelectric effect and photocatalysis. | Chenye YU Mengxi TAN Chengdong TAO Yuxuan HU Chuanbao LIU Huimin MENG Yanjing SU Lijie QIAO Yang BAI | 2022 | Journal of Advanced Ceramics2022，11，3： | 1 |
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