Dendritic CuSe with Hierarchical Side-Branches: Synthesis, Efficient Adsorption, and Enhanced Photocatalytic Activities under Daylight

Liu, Meng Li; Chen, Bin-Bin; Li, Rong Sheng; Li, Chun Mei; Zou, Hong Yan

doi:10.1021/acssuschemeng.7b00126

Cited by 58 publications

(10 citation statements)

References 43 publications

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“…Recently, several low cost alternative cocatalysts based on VIB (Mo and W) and VIII (Fe, Co, and Ni) group transition metals, such as oxides, , hydroxides, , sulfides, , selenides, , carbides, − and nitrides − have been verified to be effective cocatalysts in catalyzing photocatalytic H 2 production when combined with various semiconductor photocatalysts. Recently, rarely studied vanadium-based materials, such as VS 2 and VC, have also been reported to exhibit superior activities for electrocatalytic and photocatalytic H 2 production.…”

Section: Introductionmentioning

confidence: 99%

Metallic Vanadium Nitride as a Noble-Metal-Free Cocatalyst Efficiently Catalyzes Photocatalytic Hydrogen Production with CdS Nanoparticles under Visible Light Irradiation

et al. 2019

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Developing highly efficient H 2 production cocatalysts based on earth-abundant elements is of significant importance for large-scale conversion of solar light energy to clean H 2 energy via photocatalytic water splitting on semiconductor photocatalysts. Herein, we report that metallic vanadium nitride (VN) could serve as an efficient cocatalyst to greatly promote the photocatalytic H 2 production on the CdS photocatalyst under visible light irradiation (≥420 nm). When CdS is combined with 15 wt % VN, the resulting CdS/VN photocatalyst (denoted as CN15) exhibits the highest photocatalytic H 2 production rate of 6.24 mmol h −1 g −1 , which is 6.7 times higher than that of pristine CdS. The apparent quantum efficiency (AQE) of photocatalytic H 2 production over CN15 is determined to be 5.3% at 420 nm. In addition, the H 2 production activity of CN15 is stable after six cycles of continuous light irradiation of 30 h. Photoluminescence (PL) analyses and photoelectrochemical measurements show that the VN acting as a cocatalyst can not only promote the interfacial charge transfer from CdS to VN to enhance the photogenerated charge separation efficiency but also efficiently catalyze H 2 production with low overpotential, which may account for the enhanced photocatalytic activity. This work confirms that VN is an efficient noble-metal-free cocatalyst for solar photocatalytic H 2 production.

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Section: Introductionmentioning

confidence: 99%

Metallic Vanadium Nitride as a Noble-Metal-Free Cocatalyst Efficiently Catalyzes Photocatalytic Hydrogen Production with CdS Nanoparticles under Visible Light Irradiation

et al. 2019

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“…Homogeneous AOP that involve activation of H 2 O 2 to produce · OH through dissolved Fe 2+ /Fe 3+ redox pair suffer from fundamental drawbacks such as retarded reduction kinetics of the redox cycle and pH-dependent efficiency. Nanomaterials (2-D layered solids, semiconductor metal oxides/sulfides) with inherent properties such as rapid charge transfer, large surface area, optimal charge diffusion, and path length have been explored as heterogeneous catalysts − in AOP to overcome these drawbacks. In this context, porous aggregates of CuS nanoparticles are explored as a photocatalyst in photochemical degradation of organic dyes (methylene blue, methyl orange) and carcinogenic 4-chlorophenol under natural sunlight.…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Synthesis of Porous Aggregates of CuS Nanoparticles for Sunlight Photocatalysis

Nethravathi¹,

Nath²,

Rajamathi³

et al. 2019

ACS Omega

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Solvated two-dimensional nanosheets of copper hydroxy dodecylsulfate in 1-butanol react with thiourea under microwave irradiation to yield surfactant-free porous aggregates of CuS nanoparticles. These aggregates exhibit excellent photocatalytic activity toward degradation of methylene blue, methyl orange, and 4-chlorophenol in natural sunlight. While the high surface area (14.74 m 2 g –1 ) and porosity increase the active reaction centers for adsorption and degradation of organic molecules, quantum confinement results in a low recombination of photogenerated electrons and holes. Chemical and photogenerated hydroxyl radicals cause the oxidation of the dyes and 4-chlorophenol.

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“…Copper selenide, a band gap semiconductor, has been widely used in the fields of thermoelectric devices,, gas sensors,, catalysts, and rechargeable lithium and sodium batteries ,. For Cu 2‐x Se, Se atoms are located in face‐centered cubic positions, while Cu ions are in superionic states ,.…”

Section: Introductionmentioning

confidence: 99%

CNTs@C@Cu_2‐xSe Hybrid Materials: An Advanced Electrode for High Performance Lithium Batteries and Supercapacitors

et al. 2018

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In this work, one dimensional CNTs@C anchored with Cu2‐xSe nanospheres have been prepared by a facile solvothermal method. The parameters affected the morphology of the sample are investigated. When evaluated as anode for Li ion batteries, the obtained CNTs@C@Cu2‐xSe electrode delivers enhanced electrochemical performance with high reversible capacity, better cycle stability and rate capability. After 100th cycle, a discharge capacity of 399 mAh g−1 can be achieved at 0.1 A g−1. Even at high rate of 2 A g−1, the electrode can still keep a capacity of 198 mAh g−1 after 50 cycles. In addition, the obtained CNTs@C@Cu2‐xSe shows typical faradaic redox properties and exhibits excellent specific capacity (302.7 g−1 at 1 A g−1) and prominent cycling stability (86.9 % capacity retention after 2000 cycles at 2 A g−1). The enhanced electrochemical performance can be attributed to the unique structure. The Cu2‐xSe nanospheres consist of numerous nanocrystalline, which increases the contact area between Cu2‐xSe and electrolyte, reduces the pave length as well as accommodates volume change during cycling. The amorphous carbon layer with numerous carboxyl and hydroxyl groups strengthens the adhesion between the Cu2‐xSe and the CNTs. And the CNTs can enhance the conductivity of Cu2‐xSe and alleviate the mechanical stress and strain of the electrode during charge and discharge process.

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Dendritic CuSe with Hierarchical Side-Branches: Synthesis, Efficient Adsorption, and Enhanced Photocatalytic Activities under Daylight

Cited by 58 publications

References 43 publications

Metallic Vanadium Nitride as a Noble-Metal-Free Cocatalyst Efficiently Catalyzes Photocatalytic Hydrogen Production with CdS Nanoparticles under Visible Light Irradiation

Metallic Vanadium Nitride as a Noble-Metal-Free Cocatalyst Efficiently Catalyzes Photocatalytic Hydrogen Production with CdS Nanoparticles under Visible Light Irradiation

Microwave-Assisted Synthesis of Porous Aggregates of CuS Nanoparticles for Sunlight Photocatalysis

CNTs@C@Cu_2‐xSe Hybrid Materials: An Advanced Electrode for High Performance Lithium Batteries and Supercapacitors

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Dendritic CuSe with Hierarchical Side-Branches: Synthesis, Efficient Adsorption, and Enhanced Photocatalytic Activities under Daylight

Cited by 58 publications

References 43 publications

Metallic Vanadium Nitride as a Noble-Metal-Free Cocatalyst Efficiently Catalyzes Photocatalytic Hydrogen Production with CdS Nanoparticles under Visible Light Irradiation

Metallic Vanadium Nitride as a Noble-Metal-Free Cocatalyst Efficiently Catalyzes Photocatalytic Hydrogen Production with CdS Nanoparticles under Visible Light Irradiation

Microwave-Assisted Synthesis of Porous Aggregates of CuS Nanoparticles for Sunlight Photocatalysis

CNTs@C@Cu2‐xSe Hybrid Materials: An Advanced Electrode for High Performance Lithium Batteries and Supercapacitors

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CNTs@C@Cu_2‐xSe Hybrid Materials: An Advanced Electrode for High Performance Lithium Batteries and Supercapacitors