水热反应条件对多孔球状Bi2WO6光催化剂结构及性能的影响

doi:10.7503/cjcu20200007

摘要/Abstract

摘要：

采用水热法制备了Bi₂WO₆光催化剂, 考察了水热反应温度、水热反应时间及前驱体溶液pH值等条件对其对乙烯可见光催化活性的影响, 并通过X射线衍射(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射光谱(UV-Vis DRS)和比表面积分析等对催化剂的晶相组成、微观形貌和光学性质等进行表征. 结果表明, 在水热反应温度为120 ℃、水热反应时间为12 h、前驱体溶液pH=0.5条件下, Bi₂WO₆光催化剂经过各向异性生长以及自组装奥斯特瓦尔德成熟(Ostwald ripening)过程, 形成由二维纳米薄片自组装的多孔微球状结构, 有效增大了与乙烯气体的接触面积, 禁带宽度降至2.86 eV, 可见光响应范围拓宽, 表现出优异的光催化性能, 在可见光下240 min内对乙烯的降解率达到13.69%.

关键词: 多孔微球, 钨酸铋, 可见光催化, 乙烯降解

Abstract:

Bi₂WO₆ photocatalysts were prepared via hydrothermal method. The effects of hydrothermal reaction temperature, hydrothermal time and pH value of precursor solution on the catalytic activity of the catalysts for ethylene degradation under visible-light irradiation were investigated. The crystal composition, micro-morphology and optical properties were characterized by X-ray powder diffraction(XRD), scanning electron microscopy(SEM), UV-Visible diffuse reflectance spectroscopy(UV-Vis DRS) and BET surface area analysis. The results show that at the conditions of 120 ℃, 12 h, pH=0.5, the Bi₂WO₆ photocatalyst undergoes anisotropic growth and Ostwald ripening process to form a porous microsphere structure self-assembled by two-dimensional nanosheets, which effectively increases the contact area with ethylene gas. The band gap width of the catalyst is reduced to 2.86 eV, and the visible light response range is widened. The degradation rate of ethylene reached 13.69% with in 240 min under visible light irradiation.

Key words: Porous microsphere, Bi₂WO₆, Visible-light photocatalysis, Ethylene degradation

中图分类号:

O644
O611.4

TrendMD:

王蕊,徐梅,谢家文,叶盛英,宋贤良. 水热反应条件对多孔球状Bi₂WO₆光催化剂结构及性能的影响. 高等学校化学学报, 2020, 41(6): 1320.

WANG Rui,XU Mei,XIE Jiawen,YE Shengying,SONG Xianliang. Effects of Hydrothermal Reaction Conditions on the Structure and Properties of Porous Spherical Bi₂WO₆ Photocatalyst ^†. Chem. J. Chinese Universities, 2020, 41(6): 1320.

图/表 7

Fig.1 XRD patterns of Bi2WO6 photocatalyst prepared with different hydrothermal temperature(A), hydrothermal time(B) and pH value of precursor solution(C)

Table 1 Average grain size, lattice constants, light absorption wavelength threshold(λg) and forbidden bondwidth(Eg) of Bi2WO6

Synthetic conditions			D/nm	Lattice constant			λ_g/nm	E_g/eV
Temperature/℃	Time/h	pH	D/nm	a/nm	b/nm	c/nm	λ_g/nm	E_g/eV
100	12	0.5	18.48	0.544	1.642	0.546	420.2	3.11
120	12	0.5	22.40	0.544	1.642	0.546	434.2	2.86
140	12	0.5	23.98	0.545	1.641	0.546	433.5	2.94
120	4	0.5	20.56	0.543	1.639	0.545	432.7	3.11
120	8	0.5	21.74	0.546	1.643	0.544	427.4	3.01
120	16	0.5	23.65	0.545	1.639	0.545	420.9	3.07
120	12	3.5	36.38	0.544	1.645	0.546	426.0	3.12
120	12	6.5	31.81	0.546	1.645	0.546	428.7	3.24
120	12	9.5	47.43	0.545	1.643	0.547	419.4	3.34

Fig.2 SEM images of Bi2WO6 photocatalysts obtained at 100 ℃(A), 120 ℃(B) and 140 ℃(C)

Fig.3 SEM images of Bi2WO6 photocatalyst obtianed under different conditions (A)—(C) Hydrothermal time is 4, 8, 16 h, respectively; (D)—(F) pH value of precursor solution is 3.5, 6.5, 9.5, respectively.

Fig.4 UV-Vis DRS(A, C, E) and (αhν)1/2-hν plots(B, D, F) of the samples prepared with different hydrothermal temperature(A, B), hydrothermal time(C, D) and pH value of precursor solution(E, F)

Fig.5 Kinetic fitting for the catalytic degradation of ethylene using Bi2WO6 photocatalysts prepared with differen hydrothermal temperature(A), hydrothermal time(B) and pH valuve of the precursor solution(C)

Fig.6 Ethylene degradation rate with Bi2WO6 photocatalysts prepared under different hydrothermal conditions

参考文献 25

[1]	Nicolas K., Marie-Noëlle D., Didier R., Chem. Rev., 2013, 113(7), 5029—5070
[2]	Kudo A., Hijii S., Chem. Lett., 1999, 58, 1103—1104
[3]	Huang D. L., Li J., Zeng G. M., Xue W. J., Chen S., Li Z. H., Deng R., Yang Y., Cheng M., Chem. Eng. J., 2019, 375, 121991
[4]	Lai S. T., Zhang P., Zhou W. Y., Xie Z. H., Yang Z. H. , J. Inorg. Mater. 2012, 27(9), 945—950
	( 赖树挺, 张鹏, 周武艺, 谢振华, 杨卓鸿 . 无机材料学报, 2012, 27(9) 945—950)
[5]	Han T. Y., Wang X., Ma Y. C., Shao G. L., Dong X. L., Yu C. L., J. Sol-Gel Sci. Technol., 2017, 82(1), 101—108
[6]	Liu X., Lu Q., Liu J., J. Alloys Compd., 2016, 662, 598—606
[7]	Liu Z., Wang Q., Tan X., Zheng S. Y., Zhang H., Wang Y. J., Gao S. M., J. Alloys Compd., 2020, 815, 152478
[8]	Lai M. T. L., Lai C. W., Lee K. M., Chook S. W., Yang T. C. K., Chong S. H., Juan J. C., J. Alloys Compd., 2019, 801, 502—510
[9]	Cai C. Y., Wang C., Zhang C. Y., Guo Q., Luo W. N., Wang B., Wang Y. J., Zhou L. H., Wang M. Y., Mater. Lett., 2020, 259, 126851
[10]	Dumrongrojthanath P., Thongtem T., Phuruangrat A., Thongtem S., Superlattices Microstruct., 2013, 64, 196—203
[11]	Liu X., Wang S., Wang S., Shi H., Zhang X., Zhong Z., Royal Society Open Science, 2019, 6(3), 181422
[12]	Chen Y., Xing C., Ji S. L., Liang H. B., Zhang H. Y., Chen Y. , Chem. J. Chinese Universities 2014, 35(6), 1277—1285
	( 陈颖, 邢宸, 姬生伦, 梁宏宝, 张宏宇, 陈艳 . 高等学校化学学报, 2014, 35(6) 1277—1285)
[13]	Zhang L., Wang W., Zhou L., Xu H., Photocatal. Act. Small, 2007, 3(9), 1618—1625
[14]	Chen Y., Yang J. T., Xie Z. F., Wei Q. M., Zhu L. G., Liu G. C., J. Synthetic Cryst., 2014, 43(2), 380—387
	( 陈渊, 杨家添, 谢祖芳, 韦庆敏, 朱立刚, 刘国聪 . 人工晶体学报, 2014, 43(2) 380—387)
[15]	Liang W., Pan J., Duan X., Tang H., Xu J., Tang G., Ceram. Int., 2020, 46(3), 3623—3630
[16]	Tian G., Chen Y., Zhou W., Pan K., Dong Y., Tian C., Fu H., J. Mater. Chem., 2011, 21(3), 887—892
[17]	Hamad A., Li L., Liu Z., Zhong X. L., J. Laser Micro Nanoeng., 2017, 12(1), 50—56
[18]	Purbia R., Paria S., Nanoscale, 2015, 7(47), 19789—19873
[19]	Schneider J., Matsuoka M., Takeuchi M., Zhang J., Horiuchi Y., Anpo M., Bahnemann D. W., Chem. Rev., 2014, 114(19), 9919—9986
[20]	Wang H. D., Wang L., Xu M., Huang L. C., Song X. L. , Chem. J. Chinese Universities 2018, 39(5), 996—1002
	( 王海丹, 王丽, 徐梅, 黄丽晨, 宋贤良 . 高等学校化学学报, 2018, 39(5) 996—1002)
[21]	Hagfeldt A., Graetzel M., Chem. Rev., 1995, 95(1), 49—68
[22]	Cheng J ., The Mechanism and Visible Light Photocatalytic Research of Controllable Transformation from BiOCl to Bi₂WO₆ Superstructure in a New Bi-W-Cl-O Solvothermal System, Huazhong University of Science and Technology, Wuhan, 2014
	( 成姣 . Bi-W-Cl-O溶剂热体系氯氧/钨酸铋超结构的可控转变机理与可见光催化研究, 武汉: 华中科技大学, 2014)
[23]	Tian Y., Hua G., Xu W., Li N., Fang M., Zhang L., J. Alloys Compd., 2011, 509(3), 724—730
[24]	Ge L., Liu J., Appl. Catal. B: Enviro., 2011, 105(3), 289—297
[25]	Han C., Wang Y., Lei Y., Wang B., Wu N., Shi Q., Li Q., Nano Res., 2015, 8(4), 1199—1209

水热反应条件对多孔球状Bi₂WO₆光催化剂结构及性能的影响

Effects of Hydrothermal Reaction Conditions on the Structure and Properties of Porous Spherical Bi₂WO₆ Photocatalyst ^†

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 7

参考文献 25

相关文章 15

编辑推荐

Metrics

本文评价

[1]	冯丽, 邵兰兴, 李思骏, 全文选, 庄金亮. 超薄Sm-MOF纳米片的合成及可见光催化降解芥子气模拟剂性能[J]. 高等学校化学学报, 2022, 43(4): 20210867.
[2]	徐文艺,冯乙巳. 2,3-丁二酮介导的CF₃SO₂Na与烯烃的氧化三氟甲基化反应[J]. 高等学校化学学报, 2020, 41(7): 1567.
[3]	刘垚杉,吴海林,贾智,杜博,刘大勇,周志敏. 丝素改性聚乳酸-羟基乙酸共聚物多孔微球作为牙龈间充质干细胞递送载体的研究[J]. 高等学校化学学报, 2019, 40(11): 2419.
[4]	王海丹, 王丽, 徐梅, 黄丽晨, 宋贤良. Bi₂WO₆/TiO₂纳米复合材料对乙烯的光催化降解[J]. 高等学校化学学报, 2018, 39(5): 996.
[5]	秦诗, 井丽巍, 张春峰, 王贵宾, 张淑玲. 空心多孔可交联超支化聚芳醚酮微球的制备[J]. 高等学校化学学报, 2018, 39(11): 2581.
[6]	阿山, 郑家威, 刘聚明, 白杰, 杨桔材, 张前程. 乙酸修饰Ag/TiO₂复合光催化剂的制备及协同催化性能[J]. 高等学校化学学报, 2017, 38(8): 1450.
[7]	张春磊, 黄丹娅, 孙明慧, 欧阳逸挺, 王超, 李小云, 陈丽华, 苏宝连. 非金属元素掺杂及三维花状多级结构对介孔TiO₂可见光催化性能的促进作用[J]. 高等学校化学学报, 2017, 38(3): 471.
[8]	李跃军, 曹铁平, 梅泽民, 席啸天, 王霞. Pr掺杂Bi₂MoO₆/TiO₂复合纳米纤维的制备及可见光催化性能[J]. 高等学校化学学报, 2017, 38(12): 2313.
[9]	刘琼君, 林碧洲, 李培培, 高碧芬, 陈亦琳. BiPO₄/BiVO₄复合材料的制备及可见光催化活性[J]. 高等学校化学学报, 2017, 38(1): 94.
[10]	卢勇宏, 吴平霄, 黄俊毅, 陈理想, 朱能武, 党志. 碱化辅助水热法制备高活性CdZnS可见光催化剂[J]. 高等学校化学学报, 2015, 36(8): 1563.
[11]	王威, 何皎洁, 崔福义, 王策. Ag₂O/TiO₂纳米线异质结的制备及可见光催化性能[J]. 高等学校化学学报, 2015, 36(7): 1367.
[12]	李卫兵, 冯昌, 岳继光, 华方霞, 补钰煜. TiO₂分级结构/Ag₃PO₄复合材料的可见光催化性能[J]. 高等学校化学学报, 2015, 36(6): 1194.
[13]	丁敏娟, 黄徽, 杨平. 有序介孔三氧化二铟/还原氧化石墨烯纳米复合材料的制备及可见光催化性能[J]. 高等学校化学学报, 2015, 36(5): 989.
[14]	王晓晖, 达胡白乙拉, 李晓天. Au与Fe₃O₄纳米微粒共嵌TiO₂纳米纤维的制备及可见光催化性能[J]. 高等学校化学学报, 2015, 36(5): 976.
[15]	李霞, 张霞, 朱泽峰, 林国庆, 李有彬, 李晓雪, 徐君莉. TiO₂/Ag₂NCN复合光催化剂的制备与可见光催化性能[J]. 高等学校化学学报, 2015, 36(2): 361.