Amorphous TiO2 coated hierarchical WO3 Nanosheet/CdS Nanorod arrays for improved photoelectrochemical performance

Wang, Zhiwei; Yang, Guang; Tan, Chiew Kei; Nguyen, Tam D.; Tok, Alfred Iing Yoong

doi:10.1016/j.apsusc.2019.06.090

Cited by 23 publications

(14 citation statements)

References 48 publications

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“…The TiO 2 –ZnO-C composite photoelectrode exhibited superior photoresponse performance to the other photoelectrodes. The aforementioned result is similar to that obtained in a previous study for a WO 3 nanosheet-decorated CdS nanorod composite, which revealed substantially improved PEC performance to pristine CdS because of the improved photogenerated charge separation ability in the heterogeneous system [ 30 ]. Figure 8 b displays the Nyquist plots of the TiO 2 , TiO 2 –ZnO–C, and TiO 2 –ZnO–H photoelectrodes under irradiation.…”

Section: Resultssupporting

confidence: 90%

Crystal Growth and Design of Disk/Filament ZnO-Decorated 1D TiO2 Composite Ceramics for Photoexcited Device Applications

Liang

Zhao

2021

Nanomaterials

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Disk- and filament-like ZnO crystals were decorated on one-dimensional TiO2 nanostructures (TiO2–ZnO) through various integrated physical and chemical synthesis methods. The morphology of the ZnO crystals on TiO2 varied with the chemical synthesis method used. ZnO nanodisks decorated with TiO2 nanorods (TiO2–ZnO–C) were synthesized using the chemical bath deposition method, and ZnO filament-like crystals decorated with TiO2 nanorods (TiO2–ZnO–H) were synthesized through the hydrothermal method. Compared with the pristine TiO2 nanorods, the as-synthesized TiO2–ZnO composites exhibited enhanced photophysiochemical performance. Furthermore, because of their fast electron transportation and abundant surface active sites, the ZnO nanodisks in the TiO2–ZnO–C composite exhibited a higher photoactivity than those in the TiO2–ZnO–H composite. The morphology and crystal quality of the ZnO decoration layer were manipulated using different synthesis methods to realize disk- or filament-like ZnO-decorated TiO2 composites with various photoactive performance levels.

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Section: Resultssupporting

confidence: 90%

Crystal Growth and Design of Disk/Filament ZnO-Decorated 1D TiO2 Composite Ceramics for Photoexcited Device Applications

Liang

Zhao

2021

Nanomaterials

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“…Figure2d reveals the XPS spectrum of Cd 3d of the sample. The peaks situate at 405.5 eV and 412.2 eV correspond to the binding energy of Cd 3d 3/5 and Cd 3d 3/2 respectively, which identifies the Cd in CdS . And 6.8 eV's difference indicates the presence of Cd 2+ in the sample .…”

Section: Resultsmentioning

confidence: 98%

Preparation of Spry‐Liked CdS‐TiO ₂ One‐Dimensional Composite Nanomaterial and Its Photocatalytic Degradation Efficiency

2020

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TiO2 is widely used on photocatalytic degradation of organic compounds under UV light irradiation. However, only 3–5 % of the sunlight can be utilized during the degradation process because of the broad band gap of TiO2. CdS, as a low band gap semiconductor material, loaded onto TiO2 can increase the absorption of photons. In this paper, the spry‐liked CdS‐TiO2 one‐dimensional composite nanomaterial was synthesized by combining electrospinning and hydrothermal methods. Compared with pure TiO2 nanofibers, the composite nanofibers exhibited higher efficiency of photocatalytic degradation of methyl orange under simulated sunlight. The enhanced photocatalytic activity of CdS‐TiO2 nanofibers could be attributed to the synergistic effect of CdS nanoparticles loaded onto the surface of TiO2 nanofibers. Furthermore, the CdS‐TiO2 composite nanofibers are easily reutilized due to their one‐dimensional nanostructure.

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“…The length of these CdS NRs ranges from 100 to 400 nm, which is smaller than the pore diameter, leaving distinguishable space in each void. Our previous studies have proved that the small CdS nanocrystals can be transformed into longer CdS NRs with extended duration of the hydrothermal reaction . However, the existence of only CdS NRs can cause all the void areas to be occupied, thus forming a thick film on the top surface of FTO IOs, which could hinder their light scattering capability.…”

Section: Resultsmentioning

confidence: 99%

Periodic FTO IOs/CdS NRs/CdSe Clusters with Superior Light Scattering Ability for Improved Photoelectrochemical Performance

Wang

Nguyen

Yeo

et al. 2020

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Periodic fluorine‐doped tin oxide inverse opals (FTO IOs) grafted with CdS nanorods (NRs) and CdSe clusters are reported for improved photoelectrochemical (PEC) performance. This hierarchical photoanode is fabricated by a combination of dip‐coating, hydrothermal reaction, and chemical bath deposition. The growth of 1D CdS NRs on the periodic walls of 3D FTO IOs forms a unique 3D/1D hierarchical structure, providing a sizeable specific surface area for the loading of CdSe clusters. Significantly, the periodic FTO IOs enable uniform light scattering while the abundant surrounded CdS NRs induce additional random light scattering, combining to give multiple light scattering within the complete hierarchical structure, significantly improving light‐harvesting of CdS NRs and CdSe clusters. The high electron collection ability of FTO IOs and the CdS/CdSe heterojunction formation also contribute to the enhanced charge transport and separation. Due to the incorporation of these enhancement strategies in one hierarchical structure, FTO IOs/CdS NRs/CdSe clusters present an improved PEC performance. The photocurrent density of FTO IOs/CdS NRs/CdSe clusters at 1.23 V versus reversible hydrogen electrode reaches 9.2 mA cm−2, which is 1.43 times greater than that of CdS NRs/CdSe clusters and 3.83 times of CdS NRs.

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Amorphous TiO2 coated hierarchical WO3 Nanosheet/CdS Nanorod arrays for improved photoelectrochemical performance

Cited by 23 publications

References 48 publications

Crystal Growth and Design of Disk/Filament ZnO-Decorated 1D TiO2 Composite Ceramics for Photoexcited Device Applications

Crystal Growth and Design of Disk/Filament ZnO-Decorated 1D TiO2 Composite Ceramics for Photoexcited Device Applications

Preparation of Spry‐Liked CdS‐TiO ₂ One‐Dimensional Composite Nanomaterial and Its Photocatalytic Degradation Efficiency

Periodic FTO IOs/CdS NRs/CdSe Clusters with Superior Light Scattering Ability for Improved Photoelectrochemical Performance

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Amorphous TiO2 coated hierarchical WO3 Nanosheet/CdS Nanorod arrays for improved photoelectrochemical performance

Cited by 23 publications

References 48 publications

Crystal Growth and Design of Disk/Filament ZnO-Decorated 1D TiO2 Composite Ceramics for Photoexcited Device Applications

Crystal Growth and Design of Disk/Filament ZnO-Decorated 1D TiO2 Composite Ceramics for Photoexcited Device Applications

Preparation of Spry‐Liked CdS‐TiO 2 One‐Dimensional Composite Nanomaterial and Its Photocatalytic Degradation Efficiency

Periodic FTO IOs/CdS NRs/CdSe Clusters with Superior Light Scattering Ability for Improved Photoelectrochemical Performance

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Preparation of Spry‐Liked CdS‐TiO ₂ One‐Dimensional Composite Nanomaterial and Its Photocatalytic Degradation Efficiency