TiO2 ALD decorated CuO/BiVO4 p-n heterojunction for improved photoelectrochemical water splitting

doi:10.1016/j.jmst.2019.03.008

材料科学与技术 ›› 2019, Vol. 35 ›› Issue (8): 1740-1746.DOI: 10.1016/j.jmst.2019.03.008

收稿日期:2018-04-26 修回日期:2018-05-24 接受日期:2018-05-25 出版日期:2019-08-05 发布日期:2019-06-19

TiO₂ ALD decorated CuO/BiVO₄ p-n heterojunction for improved photoelectrochemical water splitting

Linxing Meng, Wei Tian, Fangli Wu, Fengren Cao, Liang Li^*()

School of Physical Science and Technology, Center for Energy Conversion Materials & Physics (CECMP), Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006, China

Received:2018-04-26 Revised:2018-05-24 Accepted:2018-05-25 Online:2019-08-05 Published:2019-06-19
Contact: Li Liang
About author:
¹The authors contributed equally to this work.

摘要/Abstract

Abstract:

Bismuth vanadate (BiVO₄) is a promising photoanode material owing to the narrow bandgap, appropriate band position, and excellent resistance against photocorrosion, however, the performance of photoelectrochemical (PEC) water splitting is largely limited by the poor carrier separation and transport ability. To address these issues, for the first time, we fabricate BiVO₄ film/CuO nanocone p-n junctions as photoanodes by combing a facile spin-coating process and water bath reaction. This structure strengthens the light harvesting and promotes the charge separation and transport ability. The surface defects states are passivated by coating conformally ultrathin TiO₂ onto CuO surface through atomic layer deposition (ALD) technique. Benefiting from the favorable morphology, energy band, and surface treatment, the BiVO₄/CuO/TiO₂ heterojunction generates an improved photocurrent that is much higher than pure BiVO₄. The detailed mechanism investigations indicate that the synergetic optimization of charge separation and injection efficiency in the bulk and surface of photoelectrodes can significantly improve the performance of PEC cells.

Key words: Heterojunction, BiVO₄, Photoelectrochemical, Atomic layer deposition

. [J]. 材料科学与技术, 2019, 35(8): 1740-1746.

Linxing Meng, Wei Tian, Fangli Wu, Fengren Cao, Liang Li. TiO₂ ALD decorated CuO/BiVO₄ p-n heterojunction for improved photoelectrochemical water splitting[J]. J. Mater. Sci. Technol., 2019, 35(8): 1740-1746.

图/表 8

Fig. 1. Top-view SEM images of (a) pristine BiVO4, (b) BiVO4/ZnO and (c) BiVO4/CuO substrates, (d) Cross-sectional SEM image of BiVO4/CuO.

Fig. 2. XRD pattern of FTO, BiVO4 and BiVO4/CuO composite.

Fig. 3. Mott-Schottky spectra of (a) BiVO4, (b) CuO and (c) BiVO4/CuO.

Fig. 4. (a) Absorption spectra of as-prepared samples, (b) J-V curves of BiVO4/CuO under simulated solar light (front and back illumination) and dark condition, (c) J-V curves of BiVO4, BiVO4/CuO and BiVO4/CuO/TiO2 under back illumination (solid line) and in dark (dashed line) and (d) corresponding ABPE curves.

Fig. 5. (a) J-V curves of BiVO4/CuO/TiO2 composites with different TiO2 thickness, (b) The current density at 1.23 V vs. RHE and the onset potential as a function of TiO2 thickness, (c) J-t curves of BiVO4, BiVO4/CuO, BiVO4/CuO/TiO2 at 1.23 V vs. RHE, (d) J-t curves of BiVO4/CuO/TiO2 composites (9 and 27 cycles of TiO2 thickness) at 1.23 V vs. RHE.

Fig. 6. (a) Injection and (b) separation efficiency of BiVO4, BiVO4/CuO and BiVO4/CuO/TiO2.

Fig. 7. Nyquist plots of BiVO4, BiVO4/CuO and BiVO4/CuO/TiO2 measured at an open-circuit voltage with the inserted equivalent circuit in the bottom-right corner to fit the EIS data.

Table 1 Fitted series and charge transfer resistances from EIS data.

	R_Ω (Ω)	R_ct (kΩ)
BiVO₄	48.2	43.4
BiVO₄/CuO	48.0	10.9
BiVO₄/CuO/TiO₂	47.4	0.9

参考文献

[1]	R. Marschall, Adv. Funct. Mater. 24 (2014) 2421-2440.
[2]	X. Wang, F. Wang, Y. Sang, H. Liu, Adv. Energy Mater. (2017), Article 1700473.
[3]	X. Liu, J. locozzia, Y. Wang, X. Cui, Y. Chen, S. Zhao, Z. Li, Z. Lin, Energy Environ. Sci. 10 (2017) 402-434.
[4]	B.K. Kang, G.S. Han, J.H. Baek, D.G. Lee, Y.H. Song, S.B. Kwon, I.S. Cho, H.S. Jung, D.H. Yoon, Adv. Mater. Interfaces 4 (2017), 1700323.
[5]	Y. Park, K.J. McDonald, K.S. Choi, Chem. Soc. Rev. 42 (2013) 2321-2337.
[6]	A. Kudo, K. Omori, H. Kato, J. Am. Chem. Soc. 121 (1999) 11459-11467.
[7]	M. Zhou, J. Bao, Y. Xu, J. Zhang, J. Xie, M.G. uan, C. Wang, L. Wen, Y. Lei, Y. Xie, ACS Nano 8 (2014) 7088-7098.
[8]	Y. Bu, J. Tian, Z.W. Chen, Q. Zhang, W.B. Li, F.H. Tian, J.P. Ao, Adv. Mater. Interfaces 4 (2017), 1601235.
[9]	T.W. Kim, K.S. Choi, Science 343 (2014) 990-994.
[10]	M. Chhetri, S. Dey, C.N.R. Rao, ACS Energy Lett. 2 (5) (2017) 1062-1069.
[11]	Y. Wang, F. Li, X. Zhou, F. Yu, J. Du, L. Bai, L. Sun, Angew. Chem. Int. Ed. 56 (2017) 6911-6915.
[12]	M.Y. Ye, Z.H. Zhao, Z.F. Hu, L.Q. Liu, H.M. Ji, Z.R. Shen, T.Y. Ma, Angew. Chem. Int. Ed. 56 (2017) 8407-8411.
[13]	H. Zhang, C. Cheng, ACS Energy Lett. 2 (4) (2017) 813-821.
[14]	J. Xie, C. Guo, P. Yang, X. Wang, D. Liu, C.M. Li, Nano Energy 31 (2017) 28-36.
[15]	H. Zhang, W. Zhou, Y. Yang, C. Cheng, Small 13 (2017), 1603840.
[16]	A. Kargar, Y. Jing, S.J. Kim, C.T.R. iley, X. Pan, D. Wang, ACS Nano 7 (2013) 11112-11120.
[17]	M.K. Son, L. Steier, M. Schreier, M.T. Mayer, J. Luo, M. Grätzel, Energy Environ. Sci. 10 (2017) 912-918.
[18]	A.A. Dubale, A.G. Tamirat, H.M. Chen, T.A. Berhe, C.J.P. an, W.N. Su, B.J. Hwang, J. Mater. Chem. A 4 (2016) 2205-2216.
[19]	J. Su, L. Guo, N.B. ao, C.A. Grimes, Nano Lett. 11 (2011) 1928-1933.
[20]	R. Tang, S. Zhou, Z. Yuan, L. Yin, Adv. Funct. Mater. 27 (2017), Article 1701102.
[21]	M. Zhong, T. Hisatomi, Y.K. uang, J. Zhao, M. Liu, A. Iwase, Q. Jia, H. Nishiyama, T. Minegishi, M. Nakabayashi, N.S. hibata, R. Niishiro, C. Katayama, H.S. hibano, M.K. atayama, A.K. udo, T. Yamadaa, K. Domen, J. Am. Chem. Soc. 137 (2015) 5053-5060.
[22]	X. Chang, T. Wang, P. Zhang, J. Zhang, A. Li, J. Gong, J. Am. Chem. Soc. 137 (2015) 8356-8359.
[23]	R.A. hmad, N. Tripathy, M.S. Ahn, K.S. Bhat, T. Mahmoudi, Y. Wang, J.Y. Yoo, D.W. Kwon, H.Y. Yang, Y.B. Hahn, Sci. Rep. 7 (2017) 5715.
[24]	P. Zhang, T. Wang, J. Gong, Chem. Commun. 52 (2016) 8806-8809.
[25]	A.P. Singh, N. Kodan, B.R. Mehta, A. Held, L. Mayrhofer, M. Moseler, ACS Catal. 6 (2016) 5311-5318.
[26]	M.G. Lee, D.H. Kim, W. Sohn, C.W. Moon, H. Park, S. Lee, H.W. Jang, Nano Energy 28 (2016) 250-260.
[27]	D.K. Zhong, S. Choi, D.R. Gamelin, J. Am. Chem. Soc. 133 (2011) 18370-18377.
[28]	Y. Liu, Z. Kang, H. Si, P. Li, S. Cao, S. Liu, Y. Li, S. Zhang, Z. Zhang, Q. Liao, L. Wang, Y. Zhang, Nano Energy 35 (2017) 189-198.
[29]	F. Cao, J. Xiong, F. Wu, Q. Liu, Z. Shi, Y. Yu, X. Wang, L. Li, ACS Appl. Mater. Interfaces 8 (2016) 12239-12245.

TiO₂ ALD decorated CuO/BiVO₄ p-n heterojunction for improved photoelectrochemical water splitting

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