全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...
环境化学  2015 

钼酸铋光催化剂的制备及其光催化活性

Keywords: 钼酸铋,水热合成,光催化

Full-Text   Cite this paper   Add to My Lib

Abstract:

以表面活性剂聚乙二醇(PEG6000)为模板剂,调节其用量(0、10、20、30、40g·L-1)通过水热法制备得到Bi3.64Mo0.36O6.55/Bi2MoO6纳米光催化剂,分别命名为(BMO-0、BMO-1、BMO-2、BMO-3,BMO-4).采用X-射线衍射仪(XRD),扫描电子显微镜(SEM),紫外可见漫反射(DRSUV-Vis)和比表面仪(BET)对其进行表征,结果表明,制备得到的钼酸铋为立方相Bi3.64Mo0.36O6.55和单斜相Bi2MoO6的混合物,形貌为纳米片和纳米颗粒的混合体.在可见光(≥420nm)照射下,研究了Bi3.64Mo0.36O6.55/Bi2MoO6光催化降解罗丹明B(RhodamineB,RhB)和苯酚(phenol)的催化特性,探讨了在光催化剂制备过程中PEG6000用量对其可见光活性的影响,发现当PEG6000用量为20g·L-1时其光催化活性最好.可见光下照射2.5h即可使RhB(1.37×10-5mol·L-1)100%脱色,光照12h后对苯酚(1.48×10-3mol·L-1)的降解率达到35.15%.采用DPD分光光度法测定了体系中产生的双氧水(H2O2),并结合外加叔丁醇(t-butanol)、碘化钾(KI)等捕获剂试验,推测其催化机理主要为空穴氧化和超氧自由基(O2·-)协同氧化历程.

References

[1]  Liu G, Zhao J, Hidaka H. ESR spin-trapping detection of radical intermediates in the TiO2-assisted photo-oxidation of sulforhodamine B under visible irradiation[J]. Journal of Photochemistry and Photobiology A, 2000, 133: 83-88
[2]  Fang Yanfen, Huang Yingping, Yang Jing, et al. Unique ability of BiOBr to decarboxylate D-Glu and D-MeAsp in the photocatalytic degradation of microcystin-LR in water[J]. Environmental Science Technology, 2011, 45(4):1593-1600
[3]  Zheng Yan, Duan Fang, Chen MingQing, et al. Synthetic Bi2O2CO3 nanostructures: Novel photocatalyst with controlled special surface exposed[J]. Journal of Molecular Catalysis A: Chemical, 2010, 317(1/2): 34-40
[4]  Guo YingNa, Yang Xia, Ma FengYan, et al. Additive-free controllable fabrication of bismuth vanadates and their photocatalytic activity toward dye degradation[J]. Applied Surface Science, 2010, 256: 2215-2222
[5]  Zhang Chuan, Zhu Yongfa. Synthesis of square Bi2WO6 nanoplates as high-activity visible-light-driven photocatalysts[J]. Chemistry of materials, 2005, 17: 3537-3545
[6]  A. Martínez-de la Cruz, S. Obregón Alfaro. Synthesis and characterization of nanoparticles of a-Bi2Mo3O12 prepared by co-precipitation method: Langmuir adsorption parameters and photocatalytic properties with rhodamine B[J]. Solid State Sciences, 2009, 11: 829-835
[7]  Zheng Yan, Duan Fang, Wu Ju, et al. Enhanced photocatalytic activity of bismuth molybdates with the preferentially exposed {010} surface under visible light irradiation[J]. Journal of Molecular Catalysis A: Chemical, 2009,303: 9-14
[8]  Zhao Xu, Xu TongGuang, Yao WenQing, et al. Photodegradation of dye pollutants catalyzed by g-Bi2MoO6 nanoplate under visible light irradiation[J]. Applied Surface Science, 2009, 255: 8036-8040
[9]  Ren Jia, Wang WenZhong, Shang Meng, et al. Heterostructured bismuth molybdate composite: Preparation and improved photocatalytic activity under visible-light irradiation[J]. Applied Materials. Interfaces, 2011, 3: 2529-2533
[10]  Shimodaira Y., Kato H., Kobayashi H., et al. Photophysical properties and photocatalytic activities of bismuth molybdates under visible light irradiation[J]. The Journal of Chemistry B, 2006, 110(36): 17790-17797
[11]  Xie L J, Ma J F, Xu G. Preparation of a novel Bi2MoO6 flake-like nanophotocatalyst by molten salt method and evaluation for photocatalytic decomposition of rhodamine B[J]. Materials Chemistry and Physics, 2008, 110(2/3): 197-200
[12]  M. Antonietti. Surfactants for novel templating applications[J]. Current Opinion in Colloid & Interface Science, 2001, 6: 244-248
[13]  蒋海燕, 戴洪兴, 孟雪, 等. 单斜BiVO4可见光催化降解甲基橙的形貌效应[J]. 催化学报, 2011, 32(6): 939-949
[14]  Fang Yan-fen, Huang Ying-ping, Liu De-fu, et al. Photocatalytic degradation of the dye sulforhodamine-B: A comparative study of different light sources[J]. Journal of Environmental Sciences, 2007, 19: 97-102
[15]  曹婷婷, 邹彩琼, 黄应平, 等. 非水溶性席夫碱铁疏水异相光催化降解有毒有机污染物[J]. 高等学校化学学报, 2011, 32(1): 105-112
[16]  Hoffmann M R, Martin S T, Choi W Y, et al. Environmental applications of semiconductor photocatalysis[J]. Chemical. Reviews, 1995, 95: 69-96
[17]  Liu Weihong, Wang Hong, Zhou Di, et al. Dielectric properties of low-firing Bi2Mo2O9 thick films screen printed on Al foils and alumina substrates[J]. Journal of the American Ceramic Society, 2010, 93(8): 2202-2206
[18]  Zhang MingYi, Shao ChangLu, Mu JingBo, et al. Hierarchical heterostructures of Bi2MoO6 on carbon nanofibers: controllable solvothermal fabrication and enhanced visible photocatalytic properties[J]. Journal of Materials Chemistry, 2012, 22: 577-584
[19]  Xie Lijin, Zaimei Liu, JianBo Zhang, et al. Preparation of a novel Bi3.64Mo0.36O6.55 nanophotocatalyst by molten salt method and evaluation for photocatalytic decomposition of rhodamine B[J]. Journal of Alloys and Compounds, 2010, 503: 159-162
[20]  李二军, 陈浪, 章强, 等. 铋系半导体光催化材料[J]. 化学进展, 2010, 22(12): 2282-2289
[21]  Zhao X, Xu T G, Yao W Q, et al. Photodegradation of dye pollutants catalyzed by γ-Bi2MoO6 nanoplate under visible light irradiation[J]. Applied Surface Science, 2009, 255(18): 8036-8040
[22]  Beale A M, Sankar G. In situ study of the formation of crystalline bismuth molybdate materials under hydrothermal conditions[J]. Chemistry of materials, 2002, 15(1): 146-153
[23]  Ollis D F, Pelizzetti E, Serpone N, et al. Photocatalyzed destruction of water contaminants[J]. Environmental Science and Technology, 1991, 25: 1522-1529
[24]  Fu Hongbo, Pan Chengshi, Yao Wenqing, et al. Visible-Light-Induced Degradation of Rhodamine B by Nanosized Bi2WO6[J]. The Journal of Physical Chemistry B, 2005, 109: 22432-22439
[25]  方艳芬, 兰天龙, 黄应平, 等. 碘铈共掺杂纳米TiO2的制备及可见光光催化性能[J]. 环境化学, 2012, 31(2): 135-143
[26]  许宜铭. 环境污染物的光催化降解: 活性物种与反应机理[J]. 化学进展, 2009, 21(2/3): 524-533

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133