Chemically etched ZnO thin films, with surface-evolved nano-ridges, for efficient photoelectrochemical splitting of water

Kumari, Babita; Sharma, Shailja; Singh, Nirupama; Satsangi, Vibha R.; Dass, Sahab; Shrivastav, Rohit

doi:10.1007/s10008-015-2745-7

Cited by 10 publications

(3 citation statements)

References 35 publications

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“…Recently, one type of technologies based on photoelectrochemical (PEC) reactions is expected as a potential route to solve the problems [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. These technologies share some features in common, including utilization of nanostructured or molecular semiconductors to harvest sunlight, and conversion of solar energy into fuels or electricity by electrochemical reactions, etc.…”

Section: Introductionmentioning

confidence: 99%

“…These technologies share some features in common, including utilization of nanostructured or molecular semiconductors to harvest sunlight, and conversion of solar energy into fuels or electricity by electrochemical reactions, etc. For instance, hydrogen (H 2 ), regarded as one of the most promising candidates to fossil fuels, could be produced by photocatalytic water (H 2 O) splitting [3,[5][6][7][15][16][17]. Photocatalytic degradation of organic pollutants is a feasible and cost-effective way to address the environmental problem [1,2,9,10].…”

Section: Introductionmentioning

confidence: 99%

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Sonication-polished anodic TiO2 nanotube array-based photoanode for efficient solar energy conversion

Zhong

Guo

et al. 2016

J Solid State Electrochem

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In this work, the capping layer atop anodic TiO 2 nanotube arrays (NTAs), which hinders filling of other guest materials and transport of charge carriers, is discerned to be TiO 2 nanotapes. Then, it is completely removed by a novel sonication-polishing (SP) treatment, after which Sb 2 S 3 is subsequently introduced to fill the nanotubes by chemical bath deposition. The morphological, structural, and optical properties of the SP-treated TiO 2 NTAs and TiO 2 NTAs/Sb 2 S 3 heterogeneous structures are characterized systematically. The results indicate that SP treatment opens the tops of nanotubes with diameters of ∼120 nm, which endure a phase conversion from amorphous to anatase after calcination at 450°C; besides, stibnite Sb 2 S 3 with a band gap of ∼1.75 eV inside the TiO 2 networks is formed upon heat treatment at 330°C in Ar, which enhances the absorption in visible light range. The photoelectrochemical (PEC) and photovoltaic properties for the SP-treated TiO 2 NTAs are investigated. Results shows that the photoresponse of TiO 2 NTAs is improved by the SP treatment, and the photocurrent for the TiO 2 NTAs/Sb 2 S 3 electrode is substantially enhanced as compared to the bare TiO 2 one. A high efficiency of 6.28 % is achieved in a TiO 2 NTAs/Sb 2 S 3 PEC cell. In addition, charge recombination in the photoanode of dye-sensitized solar cells (DSSCs) is observed to be greatly retarded by using the SP-treated TiO 2 NTAs as compared to TiO 2 nanoparticles (NPs). Thus, the SP anodic TiO 2 NTAs are promising in applications in various PEC areas such as photocatalysis and sensitized solar cells.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sonication-polished anodic TiO2 nanotube array-based photoanode for efficient solar energy conversion

Zhong

Guo

et al. 2016

J Solid State Electrochem

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“…Elimination of surface defects can be performed simply by removing the defective surface layer from the surface. For inorganic photocatalysts, HF, nitric acid, sulfuric acid, H 2 O 2 –NH 3 mixed solution, aqua regia, and low‐morecular‐weight organic acids have been applied the treatment. However, these treated photocatalysts need to be washed quickly and thoroughly with plenty of water to prevent over‐ethcing.…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Water Oxidation Photoanode Made of Surface Modified LaTiO₂N Particles

Akiyama

Nakabayashi

Shibata

et al. 2016

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An improved variation of highly active/durable O -evolving LaTiO N powder-based photoelectrode has been fabricated by pre-cleaning the powder with mild polysulfonic acid and by homogeneous deposition of CoO co-catalyst aided by microwave annealing. The treatment in aqueous solution of poly(4-styrene sulfonic acid) results in removal of surface LaTiO N layers, forming fine pores in the crystallites. The CoO co-catalyst by microwave deposition in Co(NH ) Cl /ethylene glycol homogeneously covers the particle surface. The LaTiO N powder is fabricated into particle-transferred electrodes on Ti thin film supported on solid substrate. The modified LaTiO N grains on the electrode serve as a highly active O -evolving photoanode achieving 8.9 mA cm of the photocurrent density at 1.23 V versus reversible hydrogen electrode (RHE) in 0.1 m NaOH (pH 13) under solar-simulator irradiation Airmass 1.5 Global (AM 1.5G). The activity has been much improved, compared with conventional LaTiO N treated in mineral acid or with CoO deposited by impregnation. The new electrode also exhibits better durability in fixed-potential chronoamperometric tests under AM 1.5G irradiation.

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Expanded light-absorption and efficient charge-separation: bilayered thin film nano-hetero-structures, CuO/Cu–ZnO, make efficient photoanode in photoelectrochemical water splitting

et al. 2020

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Chemically etched ZnO thin films, with surface-evolved nano-ridges, for efficient photoelectrochemical splitting of water

Cited by 10 publications

References 35 publications

Sonication-polished anodic TiO2 nanotube array-based photoanode for efficient solar energy conversion

Sonication-polished anodic TiO2 nanotube array-based photoanode for efficient solar energy conversion

Highly Efficient Water Oxidation Photoanode Made of Surface Modified LaTiO₂N Particles

Expanded light-absorption and efficient charge-separation: bilayered thin film nano-hetero-structures, CuO/Cu–ZnO, make efficient photoanode in photoelectrochemical water splitting

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Chemically etched ZnO thin films, with surface-evolved nano-ridges, for efficient photoelectrochemical splitting of water

Cited by 10 publications

References 35 publications

Sonication-polished anodic TiO2 nanotube array-based photoanode for efficient solar energy conversion

Sonication-polished anodic TiO2 nanotube array-based photoanode for efficient solar energy conversion

Highly Efficient Water Oxidation Photoanode Made of Surface Modified LaTiO2N Particles

Expanded light-absorption and efficient charge-separation: bilayered thin film nano-hetero-structures, CuO/Cu–ZnO, make efficient photoanode in photoelectrochemical water splitting

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Highly Efficient Water Oxidation Photoanode Made of Surface Modified LaTiO₂N Particles