首页|In situ preparation of g-C3N4/Bi4O5I2 complex and its elevated photoactivity in Methyl Orange degradation under visible light
In situ preparation of g-C3N4/Bi4O5I2 complex and its elevated photoactivity in Methyl Orange degradation under visible light
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A graphite carbon nitride (g-C3N4) modified Bi4O5I2 composite was successfully prepared in-situ via the thermal treatment of a g-C3N4/BiOI precursor at 400℃ for 3 hr.The as-preparedg-C3N4/Bi4O5I2 showed high photocatalytic performance in Methyl Orange (MO) degradationunder visible light.The best sample presented a degradation rate of 0.164 min-1,which is3.2 and 82 times as high as that of Bi4O5I2 and g-C3N4,respectively.The g-C3N4/Bi4O5I2 wascharacterized by X-ray powder diffractometer (XRD),scanning electron microscopy (SEM),transmission electron microscopy (TEM),Raman,X-ray photoelectron spectroscopy(XPS),ultraviolet-visible diffuse reflectance spectra (DRS),electrochemical impedancespectroscopy (EIS) and transient photocurrent response in order to explain the enhancedphotoactivity.Results indicated that the decoration with a small amount of g-C3N4influenced the spedfic surface area only slightly.Nevertheless,the capability for absorbingvisible light was improved measurably,which was beneficial to the MO degradation.On topof that,a strong interaction between g-C3N4 and Bi4O5I2 was detected.This interplaypromoted the formation of a favorable heterojunction structure and thereby enhanced thecharge separation.Thus,the g-C3N4/Bi4O5I2 composite presented greater charge separationefficiency and much better photocatalytic performance than Bi4O5I2.Additionally,g-C3N4/Bi4O5I2 also presented high stability.·O-2 and holes were verified to be the main reactivespecies.
Zhe Feng、Lin Zeng、Qingle Zhang、Shifeng Ge、Xinyue Zhao、Hongjun Lin、Yiming He
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Department of Materials Science and Engineering, Zhejiang Normal University, Jinhua 321004, China
College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, China
Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, Zhejiang Normal University,Jinhua 321004, China
This work was financially supported by National Undergraduate Training Program for Innovation and EntrepreneurshipThis work was financially supported by National Undergraduate Training Program for Innovation and Entrepreneurship
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