摘要
The BiOCl/Bi12O17Cl2@MoS2(BOC-MS)composites were successfully synthesized by a facile method at room temperature.The physicochemical properties of the as-obtained samples were characterized by X-ray diffractometer(XRD),scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS),ultraviolet–visible diffuse reflection spectra(UV–Vis DRS),photoluminescence(PL),Brunauer–Emmett–Teller–Barrett–Joyner–Halenda(BET–BJH),and electron spin resonance(ESR)in detail.Moreover,the in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)was applied to elucidate the adsorption and photocatalytic reaction mechanism.The optimized BOC-MS-1.0 composites exhibited excellent visible light photocatalytic capability(51.1%)and photochemical stability for removal of NO.Based on the DMPOESR spin trapping,the·O2-radicals andáOH radicals were identified as the main active species generated from BOCMS-1.0 under visible light irradiation.The enhanced photocatalytic performance can be ascribed to the positive synergetic effect of the MoS2 and the effective carrier separation ability.
The BiOCl/Bi12 O17 Cl2@MoS2（BOC-MS）composites were successfully synthesized by a facile method at room temperature. The physicochemical properties of the as-obtained samples were characterized by X-ray diffractometer（XRD）, scanning electron microscopy（SEM）, transmission electron microscopy（TEM）, X-ray photoelectron spectroscopy（XPS）, ultraviolet–visible diffuse reflection spectra（UV–Vis DRS）, photoluminescence（PL）, Brunauer–Emmett–Teller–Barrett–Joyner–Halenda（BET–BJH）, and electron spin resonance（ESR） in detail.Moreover, the in situ diffuse reflectance infrared Fourier transform spectroscopy（DRIFTS） was applied to elucidate the adsorption and photocatalytic reaction mechanism. The optimized BOC-MS-1.0 composites exhibited excellent visible light photocatalytic capability（51.1%） and photochemical stability for removal of NO. Based on the DMPOESR spin trapping, the áO2-radicals and áOH radicals were identified as the main active species generated from BOCMS-1.0 under visible light irradiation. The enhanced photocatalytic performance can be ascribed to the positive synergetic effect of the MoS2 and the effective carrier separation ability.
基金
financially supported by the National Natural Science Foundation of China (Nos. 51708078 and 41801063)
the Natural Science Foundation of Chongqing (No. 2018jcyjA1040)
