Bi_2WO_6 was modified by two-dimensional g-C_3N_4(2D g-C_3N_4)via a hydrothermal method.The structure,morphology,optical and electronic properties were investigated by multiple techniques,including X-ray diffraction(X...Bi_2WO_6 was modified by two-dimensional g-C_3N_4(2D g-C_3N_4)via a hydrothermal method.The structure,morphology,optical and electronic properties were investigated by multiple techniques,including X-ray diffraction(XRD),X-ray photoelectron spectroscopy spectra(XPS),Fourier transform infrared spectroscopy(FT-IR),scanning electron microscopy(SEM),transmission electron microscopy(TEM),Ultravioletvisible diffuse reflection spectroscopy(DRS),photocurrent and electrochemical impedance spectroscopy(EIS),electron spin resonance(ESR),respectively.Rhodamine B(Rh B)was used as the target organic pollutant to research the photocatalytic performance of as-prepared composites.The Bi_2WO_6/2D g-C_3N_4exhibited a remarkable improvement compared with the pure Bi_2WO_6.The enhanced photocatalytic activity was because the photogenerated electrons and holes can quickly separate by Z-Scheme passageway in composites.The photocatalytic mechanism was also researched in detail through ESR analysis.展开更多
The reaction of CoCl2·6H2O with 2,6-bis（N,N＇-bis（2,6-diisopropyl-4-（2,3-dimethy-oxyl-benzoylamide）phenylimino））pyridine（L） afforded the complex [CoCl2L],which was fully characterized by elemental analysi...The reaction of CoCl2·6H2O with 2,6-bis（N,N＇-bis（2,6-diisopropyl-4-（2,3-dimethy-oxyl-benzoylamide）phenylimino））pyridine（L） afforded the complex [CoCl2L],which was fully characterized by elemental analysis,UV-vis,IR spectroscopy,fluorescence,and X-ray diffraction analysis.The compound is of triclinic system,space group P1 with a = 13.058（3）,b = 13.798（3）,c = 16.695（3） ,α = 98.191（3）,β = 102.792（3）,γ = 101.820（3）°,V = 2815.0（9） 3,Z = 2,F（000） = 1122,μ = 0.45 mm-1,R = 0.061 and wR = 0.1349 for 9842 observed reflections（Ⅰ 〉 2σ（Ⅰ））.The Co（Ⅱ） center adopts a distorted square-pyramidal coordination geometry.The extended structure shows a one-dimensional zigzag double chain linked by hydrogen bonds and π-π stacking interactions.展开更多
通过水热法制备Bi2WO6、热分解法制备α-Fe2O3,并利用机械混合的方式获得α-Fe2O3/Bi2WO6复合材料。利用XRD、UV-Vis、BET、SEM、XPS对样品进行表征,相比Bi2WO6,α-Fe2O3/Bi2WO6复合结构在可见光区域的吸收带变宽。在α-Fe2O3/Bi2WO6+H...通过水热法制备Bi2WO6、热分解法制备α-Fe2O3,并利用机械混合的方式获得α-Fe2O3/Bi2WO6复合材料。利用XRD、UV-Vis、BET、SEM、XPS对样品进行表征,相比Bi2WO6,α-Fe2O3/Bi2WO6复合结构在可见光区域的吸收带变宽。在α-Fe2O3/Bi2WO6+H2O2光催化系统中,紫外光照射30 min MO完全降解;模拟太阳光照射60 min MO降解率达到85%,高于单独的Bi2WO6和α-Fe2O3。优良的光催化活性是由于光生电子从α-Fe2O3的导带迁移到Bi2WO6的导带,有效避免了光生电子-空穴的复合,从而提升了光催化效率;在α-Fe2O3/Bi2WO6+H2O2系统中,H2O2作为电子受体,H2O作为空穴受体,能够产生更多的羟基自由基,促进MO降解。展开更多
基金supported by National Nature Science Foundation of China (21476097, 21776118)Six talent peaks project in Jiangsu Province (2014-JNHB-014)Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions
文摘Bi_2WO_6 was modified by two-dimensional g-C_3N_4(2D g-C_3N_4)via a hydrothermal method.The structure,morphology,optical and electronic properties were investigated by multiple techniques,including X-ray diffraction(XRD),X-ray photoelectron spectroscopy spectra(XPS),Fourier transform infrared spectroscopy(FT-IR),scanning electron microscopy(SEM),transmission electron microscopy(TEM),Ultravioletvisible diffuse reflection spectroscopy(DRS),photocurrent and electrochemical impedance spectroscopy(EIS),electron spin resonance(ESR),respectively.Rhodamine B(Rh B)was used as the target organic pollutant to research the photocatalytic performance of as-prepared composites.The Bi_2WO_6/2D g-C_3N_4exhibited a remarkable improvement compared with the pure Bi_2WO_6.The enhanced photocatalytic activity was because the photogenerated electrons and holes can quickly separate by Z-Scheme passageway in composites.The photocatalytic mechanism was also researched in detail through ESR analysis.
文摘通过水热法制备Bi2WO6、热分解法制备α-Fe2O3,并利用机械混合的方式获得α-Fe2O3/Bi2WO6复合材料。利用XRD、UV-Vis、BET、SEM、XPS对样品进行表征,相比Bi2WO6,α-Fe2O3/Bi2WO6复合结构在可见光区域的吸收带变宽。在α-Fe2O3/Bi2WO6+H2O2光催化系统中,紫外光照射30 min MO完全降解;模拟太阳光照射60 min MO降解率达到85%,高于单独的Bi2WO6和α-Fe2O3。优良的光催化活性是由于光生电子从α-Fe2O3的导带迁移到Bi2WO6的导带,有效避免了光生电子-空穴的复合,从而提升了光催化效率;在α-Fe2O3/Bi2WO6+H2O2系统中,H2O2作为电子受体,H2O作为空穴受体,能够产生更多的羟基自由基,促进MO降解。
