纳米Bi_2MoO_6的水热法制备及光催化性能研究
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摘要
为进一步提升钼酸铋的可见光催化活性,以Bi(NO_3)_3·5H_2O和Na2Mo O_4·2H_2O为原料,加入不同表面活性剂辅助水热法制备了纳米级钼酸铋。研究了表面活性剂种类对Bi2Mo O6形貌结构的影响,采用XRD、SEM和FTIR对产物进行了表征。结果表明:在水热合成条件下引入CTAB作为表面活性剂时,合成的纳米片厚度仅为10~20 nm。这种钼酸铋纳米片比普通钼酸铋纳米粉体具有更优的光催化活性,可见光照射180 min后对目标污染物亚甲基蓝的降解率可达81%,可见光催化效率提升2~4倍。
To enhance the photocatalytic activity of bismuth molybdate,Using Bi( NO3)3·5H_2O and Na2 Mo O4·2H_2O as raw materials,Bi2 Mo O6nanostructures were synthesized by hydrothermal method using different surfactants. The effect of surfactants types on the morphology of Bi2 Mo O6nanostructures was investigated. The obtained Bi2 Mo O6were characterized by XRD,SEM and FTIR. The results show that Bi2 Mo O6nanosheets with thickness of 10-20 nm were obtained when CTAB was used during the hydrothermal process. Compared to the common Bi2 Mo O6powders,the Bi2 Mo O6nanosheets exhibit higher photocatalytic activity. The degradation ratio of MB achieves 81% after 180 min irradiation under visible light,The catalytic efficiency can increase 2-4 times.
To enhance the photocatalytic activity of bismuth molybdate,Using Bi( NO3)3·5H_2O and Na2 Mo O4·2H_2O as raw materials,Bi2 Mo O6nanostructures were synthesized by hydrothermal method using different surfactants. The effect of surfactants types on the morphology of Bi2 Mo O6nanostructures was investigated. The obtained Bi2 Mo O6were characterized by XRD,SEM and FTIR. The results show that Bi2 Mo O6nanosheets with thickness of 10-20 nm were obtained when CTAB was used during the hydrothermal process. Compared to the common Bi2 Mo O6powders,the Bi2 Mo O6nanosheets exhibit higher photocatalytic activity. The degradation ratio of MB achieves 81% after 180 min irradiation under visible light,The catalytic efficiency can increase 2-4 times.
引文
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[15]Tong H,Ouyang S X,Bi Y P.Nano-photocatalytic Materials:Possibilities and Challenges[J].Advanced Materials,2012,24(2):229-251.
[16]Zhou Y,Zhang Y,Lin M,et al.Monolayered Bi2WO6Nanosheets Mimicking Heterojunction Interface with Open Surfaces for Photocatalysis[J].Nature Communications,2015,6.
[17]Zhang L,Xu T,Zhao X,et al.Controllable Synthesis of Bi2Mo O6and Effect of Morphology and Variation in Local Structure on Photocatalytic Activities[J].Appl.Catal.B:Environmental,2010,98:138-146.
[2]张琴,汪晓凤,段芳,等.Bi2Mo O6中空微球的制备及其光催化性能[J].无机化学学报,2015,31(11):2152-2158.
[3]徐铭.钼酸铋基光催化材料的制备、表征及其可见光光催化性能的研究[D].广州:华南理工大学,2015.
[4]Chang S L.Microwave-assisted Synthesis and Photoluminescence of MMo O4(M=Ca,Ba)Particles via a Metathetic Reaction[J].Journal of Luminescence,2012,132(7):1774-1780.
[5]Shimodaira Y,Kato H,Kobayashi H,et al.Photophysical Properties and Photocatalytic Activities of Bismuth Molybdates under Visible Light Irradiation[J].The Journal of Physical Chemistry B,2006,110(36):17790-17796.
[6]Theobald F,Laarif A,Hewat A W.Redetermination of the Crystal Structure ofα-Bi2O3·3Mo O3by Neutron Diffraction and the Catalytic Oxidation of Propene[J].Materials Research Bulletin,1985,20(6):653-665.
[7]段芳,魏取福,陈明清,等.铋系半导体光催化剂的光催化性能调控[J].化学进展,2014,26(1):30-40.
[8]Reilly L M,Sankar G,Catlo C R A.Following the Formation ofγ-phase Bi2Mo O6Catalyst by in Site XRD/XAS and Thermogravimetric Techniques[J].Journal of Solid State Chemistry,1999,148(1):178-185.
[9]Shimodaira Y,Kato H,Kobayashi H,et al.Photophysical Properties and Photocatalytic Activities of Bismuth Molybdates under Visible Light Irradiation[J].The Journal of Physical Chemistry B,2006,110(36):17790-17797.
[10]Yan T,Sun M,Liu H,et al.Fabrication of Hierarchical Bi OI/Bi2Mo O6,Heterojunction for Degradation of Bisphenol A and Dye under Visible Light Irradiation[J].Journal of Alloys&Compounds,2015,634(1):223-231.
[11]Li H H,Li K W,Wang H.Hydrothermal Synthesis and Photocatalytic Properties of Bismuth Molybdate Materials[J].Materials Chemistry&Physics,2009,116(116):134-142.
[12]Xu C,Zou D,Wang L,et al.γ-Bi2Mo O6nanoplates:Surfactant-assisted Hydrothermal Synthesis and Optical Properties[J].Ceram.Int.,2009,35:2099-2102.
[13]Zhao X,Xu T,Yao W,et al.Synthesis and Photoelectrochemical Properties of Thin Bismuth Molybdates Film with Various Crystal Phases[J].Thin Solid Films,2009,517(517):5813-5818.
[14]Yao Y H,Zhao Y J,Wang X C.Preparation and Photocatalytic Electrocatalytic Properties ofγ-Bi2Mo O6[J].Materials Letters,2010,64(11):1306-1308.
[15]Tong H,Ouyang S X,Bi Y P.Nano-photocatalytic Materials:Possibilities and Challenges[J].Advanced Materials,2012,24(2):229-251.
[16]Zhou Y,Zhang Y,Lin M,et al.Monolayered Bi2WO6Nanosheets Mimicking Heterojunction Interface with Open Surfaces for Photocatalysis[J].Nature Communications,2015,6.
[17]Zhang L,Xu T,Zhao X,et al.Controllable Synthesis of Bi2Mo O6and Effect of Morphology and Variation in Local Structure on Photocatalytic Activities[J].Appl.Catal.B:Environmental,2010,98:138-146.