Controllable Fabrication of Photogenerated Charges Gradient Continuous Transfer Chain to Enhance Photocatalytic Performance †

doi:10.7503/cjcu20190546

Abstract

Abstract:

Based on the matched band structure of γ-Bi₂O₃, α-Bi₂O₃, and Bi₄Ti₃O₁₂, the ‘ternary isotype junction’ Bi₄Ti₃O₁₂@α/γ-Bi₂O₃ with gradient energy levels was synthesized in situ by simple immersion method. The results of photocatalytic degradation of high concentration rhodamine B(RhB) and 4-chlorophenol(4-CP) show that, compared with γ-Bi₂O₃ and α/γ-Bi₂O₃, Bi₄Ti₃O₁₂@α/γ-Bi₂O₃ exhibits more remarkable photocatalytic activities. It is worth mentioning that when the mass ratio of Ti/Bi is 0.5%(0.5%Bi₄Ti₃O₁₂@α/γ-Bi₂O₃ sample), the photocatalytic degradation rate for RhB(or 4-CP) is 4.4 times(or 2.2 times) that of α/γ-Bi₂O₃, even 32 times(or 10.4 times) that of γ-Bi₂O₃. The optoelectronic property measurements confirm that greatly improved photogenerated charges separation and transference efficiency has been realized on Bi₄Ti₃O₁₂@α/γ-Bi₂O₃ ternary isotype junction, which is one of the main reasons for the high photocatalytic performance of Bi₄Ti₃O₁₂@α/γ-Bi₂O₃. This paper provides a new way for fabricating high efficiency photogenerated charges transfer chain, then promoting the separation and transference of photogenerated charges, and thus greatly improving the performance of the photocatalysis.

Key words: Bi₂O₃, Bi₄Ti₃O₁₂, Ternary isotype junction, Gradient energy level, Photodegradation

CLC Number:

O643.3

TrendMD:

LIU Dongxu, CHEN Xuebing, YANG Xia, ZHANG Jing, CHEN Changdong. Controllable Fabrication of Photogenerated Charges Gradient Continuous Transfer Chain to Enhance Photocatalytic Performance ^†[J]. Chem. J. Chinese Universities, 2020, 41(4): 742.

Figures/Tables 9

Fig.1 Mott-Schottky curves(A), UV-Vis diffuse reflectance spectra(B) and schematic illustration of the band structures of γ-Bi2O3, α-Bi2O3 and Bi4Ti3O12 samples(C)Inset of (B): plots of (αhν)2 νs. photon energy.

Fig.2 XRD patterns of γ-Bi2O3, α/γ-Bi2O3 and nBTO@α/γ-Bi2O3 samples

Fig.3 SEM images of γ-Bi2O3(A), α/γ-Bi2O3(B), 0.3%BTO@α/γ-Bi2O3(C), 0.5%BTO@α/γ-Bi2O3(D) and 3%BTO@α/γ-Bi2O3(E) samples and EDS pattern of 3%BTO@α/γ-Bi2O3 sample(F)

Scheme 1 Schematic illustration of the fabrication process for the BTO@α/γ-Bi2O3

Fig.4 UV-Vis DRS(A) and SPV spectra(B) of γ-Bi2O3, α/γ-Bi2O3 and nBTO@α/γ-Bi2O3 samples

Fig.5 Photocatalytic degradation of RhB(A) and 4-CP(B) by γ-Bi2O3, α/γ-Bi2O3, and nBTO@α/γ-Bi2O3 samplesa. γ-Bi2O3; b. α/γ-Bi2O3; c. 0.3%BTO@α/γ-Bi2O3; d. 0.5%BTO@α/γ-Bi2O3; e. 3%BTO@α/γ-Bi2O3.

Fig.6 Stability of 0.5%BTO@α/γ-Bi2O3 sample for photocatalytic degradation of RhB(A) and 4-CP(B)

Fig.7 Effects of scavengers for photocatalytic degradation of RhB(A) and 4-CP(B) by 0.5%BTO@α/γ-Bi2O3 sample

Scheme 2 Proposed mechanism of the photocatalytic activity on BTO@α/γ-Bi2O3 ternary isotype junction

References 30

[1]	Punyasloka P., Dangayach G. S., Kumar B. A., Rev. Environ. Health, 2018, 33( 2), 163— 203
[2]	Rovira J., Domingo J. L., Environ. Res., 2019, 168, 62— 69
[3]	Ji L., Guo F. Z., Wang K. H., Wang L., Chem. J. Chinese Universities, 2019, 40 7), 1501— 1509
	( 姬磊,郭翻坐,王克涵,王磊.高等学校化学学报, 2019, 40(7), 1501— 1509)
[4]	Guo Y., Wang P., Qian J., Ao Y. H., Wang C., Hou J., Appl. Catal. B: Environ., 2018, 234, 90— 99
[5]	Kozuleva M. A., Ivanov B. N., Photosynth. Res., 2010, 105( 1), 51— 61
[6]	Torres R., Diz V. E., Lagorio M. G., Photochem. Photobiol. Sci., 2018, 17( 4), 505— 516
[7]	Ikeyama S., Amao Y., Sustain. Energ. Fuels, 2017, 1( 8), 1730— 1733
[8]	Low J. X., Yu J. G., Jaroniec M., Wageh S., Al-Ghamdi A. A., Adv. Mater., 2017, 29( 20), 1601694— 1601714
[9]	Zhang J., Xu Q., Feng Z. C., Li M. J., Li C., Angew. Chem. Int. Ed., 2008, 47( 9), 1766— 1769
[10]	Ai Z. Z., Zhao G., Zhong Y. Y., Shao Y. L., Huang B. B., Wu Y. Z., Hao X. P., Appl. Catal. B: Environ., 2018, 221, 179— 186
[11]	Sun Y. Y., Wang W. Z., Zhang L., Zhang Z. J., Chem. Eng. J., 2012, 211, 161— 167
[12]	Liu D. X., Zhang J., Li C., Zhang X., Chen X. B., Wang F. F., Shi M., Li R. G., Li C., Appl. Catal. B: Environ., 2019, 248, 459— 465
[13]	Yu C. F., Yang P. Y., Tie L. N., Yang S. Y., Dong S. Y., Sun J. Y., Sun J. H., Appl. Surf. Sci., 2018, 455, 8— 17
[14]	Peng Y., Wang K. K., Liu T., Xu J., Xu B. G., Appl. Catal. B: Environ., 2017, 203, 946— 954
[15]	Hezam A., Namratha K., Ponnamma D., Drmosh Q. A., Saeed A. M. N., Cheng C., Byrappa K., ACS Omega, 2018, 3( 9), 12260— 12269
[16]	Hong Y., Li C. S., Yin B. X., Li D., Zhang Z. Y., Mao B. D., Fan W. Q., Gu W., Shi W. D., Chem. Eng. J., 2018, 338, 137— 146
[17]	Du C., Li D. H., He Q. Y., Liu J. M., Li W., He G. N., Wang Y. Z., Phys. Chem. Chem. Phys., 2016, 18( 38), 26530— 26538
[18]	Gao X. L., Yi Y., Jiang Y. Z., Guangdong Chem. Ind., 2018, 45 4), 79— 82
	( 高小龙,易迎,江银枝.广东化工, 2018, 45(4), 79— 82)
[19]	Wang S. M., Li D. L., Sun C., Yang S. G., Guan Y., He H., Appl. Catal. B: Environ., 2014, 144, 885— 892
[20]	Duan C. L., Song J. L., Wang B. Y., Li L., Wang R. F., Zhang B. W., Chem. Res. Chinese Universities, 2019, 35( 2), 277— 284
[21]	Zhao Z., Li R., Zhang X. C., Zhang C. M., Liu J. X., Wang Y. W., Wang Y. F., Fan C. M., Chem. J. Chinese Universities, 2018, 39 8), 1775— 1781
	( 赵祖,李瑞,张小超,张长明,刘建新,王雅文,王韵芳,樊彩梅.高等学校化学学报, 2018, 39(8), 1775— 1781)
[22]	Hu E., Feng Y., Nai J. W., Zhao D., Hu Y., Lou X. W., Energ. Environ. Sci., 2018, 11( 4), 872— 880
[23]	Truppi A., Petronella F., Placido T., Margiotta V., Lasorella G., Giotta L., Giannini C., Sibillano T., Murgolo S., Mascolo G., Agostiano A., Curri M. L., Comparelli R., Appl. Catal. B: Environ., 2019, 243, 604— 613
[24]	Gatos H. C., Lagowski J., J. Vac. Sci. Technol., 1973, 10( 1), 130— 135
[25]	Li X. X., Fang S. M., Ge L., Han C. C., Qiu P., Liu W. L., Appl. Catal. B: Environ., 2015, 176, 62— 69
[26]	Yang M., Yang Q., Zhong J. B., Huang S. T., Li J. Z., Song J. B., Burda C., Appl. Surf. Sci., 2017, 416, 666— 671
[27]	Wang B., Wu Y. G., Liu Z. L., Wang X. H., An Z. H., Zeng J., Liu P., Liu Z. R., Chem. J. Chinese Universities, 2018, 39 5), 1003— 1008
	( 王斌,乌英嘎,刘哲林,王晓红,安智华,曾俊,杨鹏,刘宗瑞.高等学校化学学报, 2018, 39(5), 1003— 1008)
[28]	Cui S., Li X. S., Li Y. J., Zhao H. X., Wang Y. Y., Li N., Li X. T., Li G. D., Chem. Res. Chinese Universities., 2017, 33( 3), 436— 441
[29]	Lu Y. Y., Zhang Y. Y., Zhang J., Shi Y., Li Z., Feng Z. C., Li C., Appl. Surf. Sci., 2016, 370, 312— 319
[30]	Zhang J., Chen X. B., Bai Y., Li C., Gao Y., Li R. G., Li C., J. Mater. Chem. A, 2019, 7( 17), 10264— 10272