CdS/TiO2 Nanocrystalline Films: In-situ Synthesis and Photoelectrochemical Performance

doi:10.15541/jim20180126

Abstract

Abstract:

CdS/TiO₂ heterojunction films have attracted much attention in the field of photocatalysis due to their excellent photocatalytic performance under visible light irradiation. However, the CdS/TiO₂ films prepared by the conventional methods may exhibit loose interface, leading to poor transport of photogenerated carriers in the interface. In this study, CdS/TiO₂ heterojunction films were successfully prepared by in-situ transformation (TiO₂→CdTiO₃→CdS). Morphologies and structures of as-prepared films were characterized by XRD, SEM and TEM. Results show that CdS formed on the surface of TiO₂ nanoparticle, and the interface of CdS/TiO₂ heterojunction was compact. Their photoelectrochemical (PEC) performance was investigated by electrochemical working station．Results indicate that the CdS/TiO₂ films prepared by in-situ method, whose photocurrent density was as high as 9.8 mA∙cm^-2 at 0.4 V (vs. RHE), present higher PEC activity than those prepared by successive ionic layer adsorption and reaction (SILAR). The electrochemical impedance spectroscopy (EIS) results show that the in-situ synthesized CdS/TiO₂ films own lower charge transfer resistance, which reveals that the in-situ formed compact interface can reduce the charge transfer resistance in the CdS/TiO₂interface, restrict the recombination of photo-induced carriers, and further enhance the PEC performance.

Key words: CdS/TiO₂, photoelectrochemical performance, in-situ synthesis, photoanode, heterojunction

CLC Number:

O644

LIU Can-Jun, CHEN Shu, LI Jie. CdS/TiO₂ Nanocrystalline Films: In-situ Synthesis and Photoelectrochemical Performance[J]. Journal of Inorganic Materials, 2018, 33(12): 1343-1348.

Figures/Tables 13

Fig. 1 The synthetic process (a) and XRD patterns (b) of TiO2, CdTiO3/TiO2 and 2-CdS/TiO2 films

Fig. 2 SEM images of TiO2 (a-b) and 2-CdS/TiO2 (c-d) films(b, d): Magnified images of (a, b); Inset in (a) showing cross sectional image of (a)

Fig. S1 EDS of the 2-CdS/TiO2 films

Fig. 3 TEM (a) and HRTEM (b) images of 2-CdS/TiO2 films

Fig. 4 UV-Vis absorption spectra of TiO2, CdTiO3/TiO2 and 2-CdS/TiO2 films

Fig. 5 Photocurrent density curves of TiO2 and CdS/TiO2 films

Fig. S2 (a) UV-Vis absorption spectra of 1-CdS/TiO2 and 2-CdS/TiO2 films

Fig. 6 EIS plots of 1-CdS/TiO2 and 2-CdS/TiO2 films with the inset showing equivalent circuit

Table 1 Simulated values of resistance (Rs) and charge transfer resistance (R1) of EIS plots calculated by equivalent circuit

Sample	R_s/(Ω·cm^-2)	R₁/(Ω·cm^-2)
1-CdS/TiO₂	20.43	1424.0
2-CdS/TiO₂	14.72	629.4

Fig. S3 IPCE curves of TiO2, 1-CdS/TiO2 and 2-CdS/TiO2 films

Fig. S4 I-t curves of 2-CdS/TiO2 films

Fig. S5 Mott-Schottky plots of TiO2, CdTiO3/TiO2, 2-CdS/TiO2 and CdS electrodes

Fig. 7 Schematic diagram of the photogenerated charge transport mechanism in the CdS/TiO2 electrode

References 24

[1]	LU X, XIE S, YANG H,et al. Photoelectrochemical hydrogen production from biomass derivatives and water. Chem. Soc. Rev., 2014, 43(22): 7581-7593.
[2]	HISATOMI T, KUBOTA J, DOMEN K.Recent advances in semiconductors for photocatalytic and photoelectrochemical water splitting.Chem. Soc. Rev., 2014, 43(22): 7520-7535.
[3]	WANG S C, TANG F Q, WANG L Z.Visible light responsive metal oxide photoanodes for photoelectrochemical water splitting: a comprehensive review on rational materials design.J. Inorg. Mater., 2018, 33(2): 173-197.
[4]	FUJISHIMA A, HONDA K.Electrochemical photolysis of water at a semiconductor electrode.Nature, 1972, 238(5358): 37-38.
[5]	WANG G, WANG H, LING Y,et al. Hydrogen-treated TiO2 nanowire arrays for photoelectrochemical water splitting. Nano Lett., 2011, 11(7): 3026-3033.
[6]	WANG H L, LIU X H.Preparation of silver nanoparticle loaded mesoporous TiO2 and its photocatalytic property.J. Inorg. Mater., 2016, 31(5): 555-560.
[7]	ZHANG H, CHENG C.Three-dimensional FTO/TiO2/BiVO4 composite inverse opals photoanode with excellent photoelectrochemical performance.ACS Energy Lett., 2017, 2(4): 813-821.
[8]	XIE K, WU Z, WANG M,et al. Room temperature synthesis of CdS nanoparticle-decorated TiO2 nanotube arrays by electrodeposition with improved visible-light photoelectrochemical properties. Electrochem. Commun., 2016, 63: 56-59.
[9]	LIU C, YANG Y, LI W,et al. A novel Bi2S3 nanowire@TiO2 nanorod heterogeneous nanostructure for photoelectrochemical hydrogen generation. Chem. Eng. J., 2016, 302: 717-724.
[10]	HUO H, XU Z, ZHANG T,et al. Ni/CdS/TiO2 nanotube array heterostructures for high performance photoelectrochemical biosensing. J. Mater. Chem. A, 2015, 3(11): 5882-5888.
[11]	XIE Z, LIU X, WANG W,et al. Enhanced photoelectrochemical and photocatalytic performance of TiO2 nanorod arrays/CdS quantum dots by coating TiO2 through atomic layer deposition. Nano Energy, 2015, 11: 400-408.
[12]	SUN W T, YU Y, PAN H Y,et al. CdS quantum dots sensitized TiO2 nanotube-array photoelectrodes. J. Am. Chem. Soc., 2008, 130(4): 1124-1125.
[13]	ZHANG H, ZHANG D, QIN X,et al. Three-dimensional CdS-sensitized sea urchin like TiO2-ordered arrays as efficient photoelectrochemical anodes. J. Phys. Chem. C, 2015, 119(50): 27875-27881.
[14]	LV P, YANG H, FU W,et al. The enhanced photoelectrochemical performance of CdS quantum dots sensitized TiO2 nanotube/ nanowire/nanoparticle arrays hybrid nanostructures. CrystEngComm, 2014, 16(30): 6955-6962.
[15]	GUO C, HUO H, HAN X,et al. Ni/CdS bifunctional Ti@TiO2 core-shell nanowire electrode for high-performance nonenzymatic glucose sensing. Anal. Chem., 2014, 86(1): 876-883.
[16]	KELKAR S, BALLAL C, DESHPANDE A,et al. Quantum dot CdS coupled Cd2SnO4 photoanode with high photoelectrochemical water splitting efficiency. J. Mater. Chem. A, 2013, 1(40): 12426-12431.
[17]	DHIVYA P, PRASAD A K, SRIDHARAN M.Nanostructured perovskite CdTiO3 films for methane sensing.Sens. Actuators B, 2016, 222: 987-993.
[18]	WANG G, YANG X, QIAN F,et al. Double-sided CdS and CdSe quantum dot co-sensitized ZnO nanowire arrays for photoelectrochemical hydrogen generation. Nano Lett., 2010, 10(3): 1088-1092.
[19]	YAO H, FU W, YANG H,et al. Vertical growth of two-dimensional TiO2 nanosheets array films and enhanced photoelectrochemical properties sensitized by CdS quantum dots. Electrochim. Acta, 2014, 125: 258-265.
[20]	GAO C, ZHANG Z, LI X,et al. Synergistic effects in three-dimensional SnO2/TiO2/CdS multi-heterojunction structure for highly efficient photoelectrochemical hydrogen production. Sol. Energy Mater. Sol. Cells, 2015, 141: 101-107.
[21]	LIU Y, ZHOU H, ZHOU B,et al. Highly stable CdS-modified short TiO2 nanotube array electrode for efficient visible-light hydrogen generation. Int. J. Hydrogen Energy, 2011, 36(1): 167-174.
[22]	WANG H, BAI Y, ZHANG H,et al. CdS quantum dots-sensitized TiO2 nanorod array on transparent conductive glass photoelectrodes. J. Phys. Chem. C, 2010, 114(39): 16451-16455.
[23]	LEE Y L, CHI C F, LIAU S Y.CdS/CdSe co-sensitized TiO2 photoelectrode for efficient hydrogen generation in a photoelectrochemical cell.Chem. Mater., 2010, 22(3): 922-927.
[24]	KIM H I, KIM J, KIM W,et al. Enhanced photocatalytic and photoelectrochemical activity in the ternary hybrid of CdS/TiO2/WO3 through the cascadal electron transfer. J. Phys. Chem. C, 2011, 115(19): 9797-9805.

CdS/TiO₂ Nanocrystalline Films: In-situ Synthesis and Photoelectrochemical Performance

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