Hierarchical CoTiO3@NiO core–shell sub-microbelts as direct Z-scheme photocatalyst for efficient visible-light-driven tetracycline degradation

Yang, Qian; Guo, Enyan; Lu, Qifang; Wei, Mingzhi; Ma, Jingyun; Xu, Xiaobin; Li, Qiubo

doi:10.1016/j.apsusc.2020.148892

Cited by 29 publications

(10 citation statements)

References 40 publications

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“…Weak diffraction peaks at 37.3° and 43.3°, which belonged to (111) and (200) crystal planes of cubic wurtzite NiO (JCPDS No. 47-1049) [ 34 ], were also detected (the locations are marked by green circles in the figure). Moreover, as the annealing temperature increased, the intensities of all diffraction peaks gradually increased.…”

Section: Resultsmentioning

confidence: 99%

Improved Photocatalytic Activity via n-Type ZnO/p-Type NiO Heterojunctions

Chen

et al. 2022

Nanomaterials

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The design and construct pn heterojunction to reduce the recombination rate of photogenerated electron-hole pairs can effectively improve photocatalytic activity. In this study, ZnO/NiO heterojunctions were fabricated by annealing a Zn/Ni metal organic framework precursor synthesized via coprecipitation. The effects of the precursor annealing temperature on the microstructure, morphology, and optical properties of the ZnO/NiO nanocomposites were investigated using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and UV-vis absorption spectroscopy. The results showed that the nanocomposite was composed of hexagonal wurtzite ZnO and cubic NiO, with the former being the dominant phase. Large ZnO nanoparticles were attached to small NiO nanoparticles, and a pn heterojunction interface was formed. The photodegradation performance of the nanomaterials was evaluated by monitoring the degradation of RhB under irradiation by ultraviolet light. The ZnO/NiO nanocomposites exhibited excellent photocatalytic activity when the annealing temperature was 550 °C. The photodegradation mechanism was also analyzed in detail, revealing that the heterojunction between the n-type ZnO and the p-type NiO played an important role in impeding the recombination of photogenerated electron-hole pairs and improving the photocatalytic efficiency.

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Section: Resultsmentioning

confidence: 99%

Improved Photocatalytic Activity via n-Type ZnO/p-Type NiO Heterojunctions

Chen

et al. 2022

Nanomaterials

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“…From the SEM images (Figure e,f), the NiAl-LDH sheets are uniformly distributed on the surface of multilayered Ti 3 C 2 T x , indicating the close interaction between NiAl-LDH and Ti 3 C 2 T x . It is notable that an ultrathin NiAl-LDH shell is in situ grown on the surface of the TNS nanosheet to fabricate a core–shell 2D/2D heterostructure, which could be attributed to the confinement effect derived from the negatively charged ultrathin MXene. , From the TEM image in Figure a,b, the pure NiAl-LDH presents a flower-like sphere consisting of numerous ultrathin nanoflakes. The TNS (Figure c) exhibits the typical thin nanosheets, suggesting the successful delamination of multilayered Ti 3 C 2 T x .…”

Section: Resultsmentioning

confidence: 99%

Ultrathin NiAl-Layered Double Hydroxides Grown on 2D Ti₃C₂T_x MXene to Construct Core–Shell Heterostructures for Enhanced Photocatalytic CO₂ Reduction

et al. 2021

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Photocatalytic CO 2 reduction into renewable fuels by sustainable and clean solar energy can be considered as an ideal option to decrease the atmospheric CO 2 level and fulfill the energy requirements. Layered double hydroxides (LDHs) with high surface area, tunable composition as well as exposed active sites have received enormous attention for photocatalytic CO 2 reduction. Herein, a novel NiAl-LDH/Ti 3 C 2 T x nanosheet (NiAl-LDH/TNS) with a core−shell structure was synthesized via an in situ hydrothermal method, and 2D NiAl-LDH coupled with the 2D Ti 3 C 2 T x nanosheet to form a Schottky junction can suppress the back-diffusion of electrons and facilitate the transfer of charge carriers. Benefiting from the feature, the optimized sample with the additive Ti 3 C 2 T x amount of 75 mg (NiAl-LDH/TNS-75) has the photocatalytic CO 2 reduction conversion rate of CO (2128.46 μmol h −1 g −1 ) with the selectivity of CO (90.2%) under visible-light irradiation, which is about 8.6 times higher than that of pristine NiAl-LDH. This work provides a new insight into the construction of novel 2D semiconductor photocatalysts.

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“…It possesses several key characteristics that make it attractive for this application, including a narrow bandgap of 2.25 eV, a suitable band position, strong absorption of visible light, and excellent chemical resistance. 28,29 However, owing to its higher recombination rate of photogenerated electron-hole pairs, bare CoTiO 3 has a poor photocatalytic efficiency. 30 The development of an appropriate heterojunction composite is a viable strategy for improving charge pair separation efficiency and visible-light absorption capabilities.…”

Section: Introductionmentioning

confidence: 99%

Shining a light on fungicide- water: enhanced photocatalytic degradation using the CoTiO₃/CaTiO₃ nanocomposite and experimental and theoretical viewpoints on improved intervalence charge transfer from O²⁻ to Ti⁴⁺ and from Co²⁺ to Ti⁴⁺ ions and spatial charge transfer

Narendran,

Vijayakumar,

Govinda Raj

et al. 2024

New J. Chem.

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Hierarchical CoTiO3@NiO core–shell sub-microbelts as direct Z-scheme photocatalyst for efficient visible-light-driven tetracycline degradation

Cited by 29 publications

References 40 publications

Improved Photocatalytic Activity via n-Type ZnO/p-Type NiO Heterojunctions

Improved Photocatalytic Activity via n-Type ZnO/p-Type NiO Heterojunctions

Ultrathin NiAl-Layered Double Hydroxides Grown on 2D Ti₃C₂T_x MXene to Construct Core–Shell Heterostructures for Enhanced Photocatalytic CO₂ Reduction

Shining a light on fungicide- water: enhanced photocatalytic degradation using the CoTiO₃/CaTiO₃ nanocomposite and experimental and theoretical viewpoints on improved intervalence charge transfer from O²⁻ to Ti⁴⁺ and from Co²⁺ to Ti⁴⁺ ions and spatial charge transfer

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Hierarchical CoTiO3@NiO core–shell sub-microbelts as direct Z-scheme photocatalyst for efficient visible-light-driven tetracycline degradation

Cited by 29 publications

References 40 publications

Improved Photocatalytic Activity via n-Type ZnO/p-Type NiO Heterojunctions

Improved Photocatalytic Activity via n-Type ZnO/p-Type NiO Heterojunctions

Ultrathin NiAl-Layered Double Hydroxides Grown on 2D Ti3C2Tx MXene to Construct Core–Shell Heterostructures for Enhanced Photocatalytic CO2 Reduction

Shining a light on fungicide- water: enhanced photocatalytic degradation using the CoTiO3/CaTiO3 nanocomposite and experimental and theoretical viewpoints on improved intervalence charge transfer from O2− to Ti4+ and from Co2+ to Ti4+ ions and spatial charge transfer

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Ultrathin NiAl-Layered Double Hydroxides Grown on 2D Ti₃C₂T_x MXene to Construct Core–Shell Heterostructures for Enhanced Photocatalytic CO₂ Reduction

Shining a light on fungicide- water: enhanced photocatalytic degradation using the CoTiO₃/CaTiO₃ nanocomposite and experimental and theoretical viewpoints on improved intervalence charge transfer from O²⁻ to Ti⁴⁺ and from Co²⁺ to Ti⁴⁺ ions and spatial charge transfer