Heterogeneous three-dimensional TiO2/ZnO nanorod array for enhanced photoelectrochemical water splitting properties

Xu, Fang; Mei, Jingjing; Li, Xi-Yong; Sun, Yi; Wu, Dapeng; Gao, Zhiyong; Zhang, Qian; Jiang, Kai

doi:10.1007/s11051-017-3982-8

Cited by 19 publications

(12 citation statements)

References 36 publications

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“…The composite and heterostructures of ZnO NAs with other materials have been found to have exceptional potential for PEC water splitting. In the past few years, hybrid ZnO NAs materials, such as TiO 2 /ZnO, [ 142 ] ZnO/CdS, [ 143 ] GaON/ZnO, [ 10 ] Ga 2 O 3 /ZnO, [ 144 ] Au/ZnO/CdS, [ 145 ] Au/FeOOH decorated ZnO/CdS, [ 146 ] etc., have been explored for PEC water splitting and showed promising photocurrent densities. Ibrahim et al successfully developed the GaON/ZnO NRAs composite by ultrasonically assisted hydrothermal mixing.…”

Section: Pec Water Splitting By Aligned Nas Materialsmentioning

confidence: 99%

Quasi‐1D Aligned Nanostructures for Solar‐Driven Water Splitting Applications: Challenges, Promises, and Perspectives

et al. 2021

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Solar energy conversion is considered to be one of the promising alternatives to fossil fuels. The photoelectrochemical (PEC) water splitting into hydrogen and oxygen is a prominent approach to utilize solar energy to produce clean hydrogen energy. In PEC water splitting, semiconductors play a central role for absorbing the solar radiations in the UV‐visible region and generating electron‐hole pairs that contribute to water splitting. This review provides an extensive overview of the 1D aligned nanoarrays (1D‐NAs) and their architectures as photoactive materials. 1D‐NAs can be in the form of nanorods (NRs), nanowires (NWs), nanopencils, and nanotubes (NTs), etc. The initial part of the review is dedicated to the synthesis and characterizations of the 1D‐NAs, which is followed by useful synthetic protocols explicitly employed for the synthesis of NAs morphologies and the mechanisms involved in PEC water splitting. The final section of the review provides examples of highly anticipated TiO2, ZnO, BiVO4‐based, and other miscellaneous aligned NAs utilized for PEC water splitting. The PEC water splitting performance of aligned NAs is compared with other morphologies in terms of photocurrent densities. In this review, it is attempted to provide an account of state‐of‐the‐art stable, novel, and low‐cost aligned photoactive materials for PEC water splitting.

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Section: Pec Water Splitting By Aligned Nas Materialsmentioning

confidence: 99%

Quasi‐1D Aligned Nanostructures for Solar‐Driven Water Splitting Applications: Challenges, Promises, and Perspectives

et al. 2021

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“…The quantitative data for the equivalent circuit were surveyed using a suitable model known as Randles circuit. Here, the parameters R s , R ct , and CPE represented electrolyte solution resistance, charge transfer resistance, and constant phase element, respectively [45]. The estimated values of the components are outlined in Table 3, and Sn 0.05 Zn 0.9 5O shows the lowest R s value suggesting an improved conduction compared to undoped ZnO.…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 99%

Enhanced catalytic property of metal oxide for an efficient visible-induced photoelectrochemical water splitting

Banerjee

Padhan

Thangavel

2021

J Mater Sci: Mater Electron

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Sn-doped ZnO nanorods (NRs) were grown on a conductive iodine-doped tin oxide substrate with a cost-effective two-step method (sol-gel and hydrothermal). The effect of varying concentration of dopants on morphology and photocurrent density is closely investigated. For microstructural and optical analysis, the bare and Sn-doped ZnO NRs were subjected to field emission scanning electron microscope (FESEM), energy-dispersive spectroscopy, X-ray diffraction, UV-Vis, and Raman spectroscopy. The presence of the most intense peak directed to (0002) plane confirmed the growth of ZnO NRs and their vertical alignment towards c-axis. The impact on nucleation density and morphology due to the addition of dopant was revealed by the FESEM images. The Raman analysis also confirmed the wurtzite nature of ZnO NRs along with the impact of dopant in its crystallinity. The aim of this work was to ameliorate the capability of absorbing solar light in the visible range. Sn 0.05 Zn 0.95 O exhibited highest photocurrent density among all the doped samples with 0.199% photoconversion efficiency under visible-light illumination. Therefore, the synthesised Sn 0.05 Zn 0.95 O seems to be an efficient candidate for photoelectrochemical water-splitting application.

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“…The composite heterojunctions can be as a surface protective layer to the ZnO photoelectrode, and extends the absorption range to visible light, which enhance separation efficiency of electrons and holes and further improve the performance of photoelectrochemical water splitting and photostability. [34][35][36][37] Khan et al reported a novel efficient strategy for designing a p-n type nano heterojunction photoanode to improve the water splitting efficiency by growing low band-gap p-CuFeO 2 nanolayers on n-ZnO nanorods through an easy and scalable electrochemical route. [38] So far, there are still many problems in the elaborate construction of micro-nano structures for ZnO-based semiconductors, such as phase interface defects, long-range transport of photogenerated carriers in multi-structures, and slow surface water oxidation kinetics.…”

Section: Introductionmentioning

confidence: 99%

“…ZnO photoelectrode and other p‐type semiconductors can form composite heterojunctions under the condition of the energy level matching. The composite heterojunctions can be as a surface protective layer to the ZnO photoelectrode, and extends the absorption range to visible light, which enhance separation efficiency of electrons and holes and further improve the performance of photoelectrochemical water splitting and photostability [34–37] . Khan et al.…”

Section: Introductionmentioning

confidence: 99%

Integration of an Electron Transport Layer and a p‐n Heterojunction in a ZnO photoanode for Photoelectrochemical Water Oxidation

et al. 2022

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Zinc oxide (ZnO) has received extensive attention in the field of photoelectrochemical water splitting (PEC-WS). However, ZnO has a narrow absorption range for visible light, easy recombination of photogenerated electrons and holes, and slow kinetics of surface water oxidation, limiting its further practical application. In this work, a FTO/TiO 2 /ZnO/NiO photoanode with a micro-nano structure is built with ZnO as nanosheet clusters, TiO 2 as the electron transport layer, and NiO for forming p-n heterojunction between NiO and ZnO. This photoanode exhibits a photocurrent density of 1.91 mA/cm 2 at 1.23 V RHE , which is three times that of the pure ZnO photoanode (0.65 mA/cm 2 ). The detailed mechanism investigations demonstrate that the introduced TiO 2 can reduce the interface defects between ZnO and FTO, and Ti doping to ZnO improves the conductivity, which simultaneously reduces the bottom surface and bulk charge recombination. The constructed p-n heterojunction further significantly increases the carrier transfer efficiency.

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Heterogeneous three-dimensional TiO2/ZnO nanorod array for enhanced photoelectrochemical water splitting properties

Cited by 19 publications

References 36 publications

Quasi‐1D Aligned Nanostructures for Solar‐Driven Water Splitting Applications: Challenges, Promises, and Perspectives

Quasi‐1D Aligned Nanostructures for Solar‐Driven Water Splitting Applications: Challenges, Promises, and Perspectives

Enhanced catalytic property of metal oxide for an efficient visible-induced photoelectrochemical water splitting

Integration of an Electron Transport Layer and a p‐n Heterojunction in a ZnO photoanode for Photoelectrochemical Water Oxidation

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