旋涂法制备掺杂BiOX薄膜及光催化性能研究
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摘要
采用旋涂的方法在基底材料表面原位生长Bi OX(X=Cl、Br、I)薄膜材料。样品的晶体结构和光学性质等通过X射线粉末衍射(XRD)、透射电子显微镜(TEM)、紫外可见漫反射光谱(UV-Vis)进行了表征。结果表明旋涂法制备的Bi OX薄膜是纯净的,无其他杂质,均匀性好。通过对Bi OX薄膜材料的光催化性能和瞬态表面光电压技术(TPV)进行了研究,发现卤素掺杂的Bi OBr0. 48I0. 52具有较好的光催化性能。其结果表明催化性能提高的原因可能是Bi OBr0. 48I0. 52薄膜在光照下可以产生更强的光生载流子并具有更长的光生载流子寿命。
BiOX films with substrate surface have been fabricated by spin-coating method. Crystalline structure and optical properties are characterized by X-ray diffraction( XRD),transmission electron microscopy( TEM),ultraviolet visible spectrophotometer( UV-Vis). The results show that BiOX films prepared by spin coating method are pure and have good uniformity. BiOX films have been selected to evaluate the photocatalysis performance and transient surface photovoltage( TPV). It was found that halogen-doped BiOBr0. 48 I0. 52 has good photocatalytic performance. The results indicate that the reason for the improvement of catalytic performance may be that BiOBr0. 48 I0. 52 film can produce higher concentration of photogenerated carriers and have longer photocarrier lifetime under illumination.
BiOX films with substrate surface have been fabricated by spin-coating method. Crystalline structure and optical properties are characterized by X-ray diffraction( XRD),transmission electron microscopy( TEM),ultraviolet visible spectrophotometer( UV-Vis). The results show that BiOX films prepared by spin coating method are pure and have good uniformity. BiOX films have been selected to evaluate the photocatalysis performance and transient surface photovoltage( TPV). It was found that halogen-doped BiOBr0. 48 I0. 52 has good photocatalytic performance. The results indicate that the reason for the improvement of catalytic performance may be that BiOBr0. 48 I0. 52 film can produce higher concentration of photogenerated carriers and have longer photocarrier lifetime under illumination.
引文
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[3] Lv J,Hu Q,Cao C,et al. Modulation of Valence Band Maximum Edge and Photocatalytic Activity of BiOX by Incorporation of Halides[J].Chemosphere,2017,191:427-437.
[4] Zhang W,Dong X,Jia B,et al. 2D BiOCl/Bi12O17Cl2,Nanojunction:Enhanced Visible Light Photocatalytic NO Removal and in Situ DRIFTS Investigation[J]. Applied Surface Science,2017,430:571-577.
[5] You Z,Shen Q,Su Y,et al. Construction of Z-Scheme Core-Shell G-C3N4/MCNTs/BiOI Nanocomposite Semiconductor with Snhanced VisibleLight Phototcatalytic Activity[J]. New Journal of Chemistry,2017,42:489-496.
[6] Henle J,Simon P,Frenzel A,et al. Nanosized BiOX(X=Cl,Br,I)Particles Synthesized in Reverse Microemulsions[J]. Chemistry of Materials,2007,19(3):366-373.
[7] Shen F,Zhou L,Shi J,et al. Preparation and Characterization of SiO2/BiOX(X=Cl,Br,I)Films with High Visible-Light Activity[J]. Rsc Advances,2014,5(7):4918-4925.
[8] Wu J,Cao X B. Growth of Bismuth Oxyhalide Nanoplates on Self-Standing Ti O2Nanowire Film Exhibiting Enhanced Photoelectrochemical Performances[J]. Electrochimica Acta,2017,247:646-656.
[9] Jin H M,He W W,Zhang B,et al. Facile Synthesis of Bismuth Oxyhalide Nanosheet Films with Distinct Conduction Type and Photo-Induced Charge Carrier Behavior[J]. Applied Surface Science,2018,441:832-840.
[10] Teng F,Ou Yang W,Li Y,et al. Novel Structure for High Performance UV Photodetector Based on BiOCl/ZnO Hybrid Film[J]. Small,2017,13(22):1700156-1700163.
[11] Wang Y,Long Y,Yang Z,et al. A Novel Ion-Exchange Strategy for the Fabrication of High Strong BiOI/BiOBr Heterostructure Film Coated Metal Wire Mesh with Tunable Visible-Light-Driven Photocatalytic Reactivity[J]. Journal of Hazardous Materials,2018,351:11-19.
[12] Cuellar E L,Cruz M D L,Torres N C,et al. Deposition of BiOBr Thin Films by Thermal Evaporation and Evaluation of Its Photocatalytic Activity[J]. Catalysis Today,2015,252:2-6.
[13] Dong F,Sun Y,Fu M,et al. Room Temperature Synthesis and Highly Enhanced Visible Light Photocatalytic Activity of Porous BiOI/BiOCl Composites Nanoplates Microflowers[J]. Journal of Hazardous Materials,2012,219-220(6):26-34.
[14] Lu J,Meng Q,Lv H,et al. Synthesis of Visible-Light-Driven BiOBrxI1-xSolid Solution Nanoplates by Ultrasound-Assisted Hydrolysis Method with Tunable Bandgap and Superior Photocatalytic Activity[J]. Journal of Alloys&Compounds,2018,732:167-177.
[15] Cao J,Xu B,Lin H,et al. Novel Bi2S3-Sensitized BiOCl with Highly Visible Light Photocatalytic Activity for the Removal of Rhodamine B[J].Catalysis Communications,2012,26(26):204-208.
[16] Cui H,Zhou Y,Mei J,et al. Synthesis of CdS/BiOBr Nanosheets Composites with Efficient Visible-Light Photocatalytic Activity[J]. Journal of Physics&Chemistry of Solids,2017,112:80-87.
[17] Cao J,Xu B,Lin H,et al. Novel Heterostructured Bi2S3/BiOI Photocatalyst:Facile Preparation,Characterization and Visible Light Photocatalytic Performance[J]. Dalton Transactions,2012,41(37):11482-11490.
[18] Liu Y,Son W J,Lu J,et al. Composition Dependence of the Photocatalytic Activities of BiOCl1-xBrxSolid Solutions under Visible Light[J].Chemistry-A European Journal,2011,17(34):9342-9349.
[19] Chang C,Yang H C,Gao N,et al. Core/shell P-BiOI/N-β-Bi2O3Peterojunction Array with Significantly Enhanced Photoelectrochemical Water Splitting Efficiency[J]. Journal of Alloys&Compounds,2017,738:138-144.
[20] Peng Y,Xu J,Liu T,et al. Controlled Synthesis of One-Dimensional BiOBr with Exposed(110)Facets and Enhanced Photocatalytic Activity[J]. Crystengcomm,2017,19(43):6373-6480.