Novel method of constructing CdS/ZnS heterojunction for high performance and stable photocatalytic activity

Zhang, Kejie; Jin, Ling; Yang, Yuncan; Guo, Kechun; Hu, Fang

doi:10.1016/j.jphotochem.2019.111859

Cited by 29 publications

(14 citation statements)

References 65 publications

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“…31 So far, various semiconductors, such as Ni-P, ZnO, TiO 2 , MoS 2 , CdS and Co x S y , have been considered as a prospective "coupled phase" for the preparation of ZnS-based heterojunctions, showing greatly accelerated charge mobility and enhanced photocatalytic activity as compared with the pristine ZnS phase. [32][33][34][35][36][37][38][39][40] Therefore, integrating advanced hollow frame construction and ZnS-based heterostructure engineering through a controllable design can be highly favorable to improve photocatalytic hydrogen evolution activity. Heteroepitaxial growth strategy on metal-organic frameworks (MOFs) and the preparation of bimetallic MOFs are widely reported as facile approaches for the synthesis of multiphasic nanoarchitectures, which could be converted to the desired heterostructure by post-synthetic treatments.…”

Section: Introductionmentioning

confidence: 99%

Phase segregation via etching-induced cation migration in CoS_x–ZnS nanoarchitectures for solar hydrogen evolution

Shen

Huang

Chen

et al. 2022

Catal. Sci. Technol.

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Section: Introductionmentioning

confidence: 99%

Phase segregation via etching-induced cation migration in CoS_x–ZnS nanoarchitectures for solar hydrogen evolution

Shen

Huang

Chen

et al. 2022

Catal. Sci. Technol.

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“…This has emphasised the choice of semiconductors that could harvest the entire solar spectrum through their use as QD sensitisers. A major class of semiconductors consists of metal sulfide semiconductor-based photocatalysts that can alter size distribution without changing chemical constituents [16,17]. Copper monosulfide (CuS) has distinguished itself among metal sulfides owing to its different band gap and various morphologies.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Fingerprint of CuS-Hexagonal Chemistry from (Bis(N-1,4-Phenyl-N-(4-Morpholinedithiocarbamato) Copper(II) Complexes) as Photon Absorber in Quantum-Dot/Dye-Sensitised Solar Cells

et al. 2020

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The main deficit of quantum dot/dye-sensitised solar cells (QDSSCs) remains the absence of a photosensitiser that can absorb the entire visible spectrum and increase electrocatalytic activity by enhancing the conversion efficiency of QDSSCs. This placed great emphasis on the synthesis route adopted for the preparation of the sensitiser. Herein, we report the fabrication of hexagonal copper monosulfide (CuS) nanocrystals, both hexadecylamine (HDA) capped and uncapped, through thermal decomposition by thermogravimetric analysis (TGA) and a single-source precursor route. Morphological, structural, and electrochemical instruments were used to assert the properties of both materials. The CuS/HDA photosensitiser demonstrated an appropriate lifetime and electron transfer, while the electron back reaction of CuS lowered the electron lifetime in the QDSSCs. The higher electrocatalytic activity and interfacial resistance observed from current density-voltage (I-V) results agreed with electrochemical impedance spectroscopy (EIS) results for CuS/HDA. The successful fabrication of hexagonal CuS nanostructures of interesting conversion output suggested that both HDA capped and uncapped nanocrystals could be adopted in photovoltaic cells.

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“…By exposure to light, both heterojunction semiconductors could be excited to produce photogenerated electrons (e − ) and holes (h + ). In the Type I heterojunction, the band energy levels of one semiconductor are included in that of the second one, and the electrons and holes migrate along the same direction (Zhang et al, 2019). In the opposite case (type II heterojunction), the electrons and holes are allowed to transfer to other semiconductors from heterojunction, when spatial charge separation has occurred.…”

Section: Dyes Photodegradation—a General Mechanism Overviewmentioning

confidence: 99%

“…An important class of semiconductor-based photocatalysts is metal sulfides, for which the bandgap can be slightly tuned by simply controlling the particle sizes, without altering the chemical composition (Zhang et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Copper Sulfide Based Heterojunctions as Photocatalysts for Dyes Photodegradation

et al. 2019

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The presence of toxic, non-biodegradable and harmful organic pollutants in soils, wastewater, and atmosphere has become an indisputable, and global fact as a significant environmental problem. The heterogeneous photocatalysis, an advanced oxidation process (AOP) using semiconductor materials as catalysts, is a topic of great interest considering the possibility of the pollutants removal from water. The photocatalytic degradation of organic contaminants (i.e., dyes, pesticides, phenolic compounds) present in water using semiconductor materials depends on a number of parameters such as: the bandgap energy, phase composition, crystallinity, morphology and surface area of catalyst, electron-hole recombination rate, intensity of light, and adsorption capacity of the dye on the photocatalyst surface. One of the important constraints related to the catalyst photocatalytic efficiency is the fast recombination of the photogenerated electrons and holes. Therefore, various strategies have been involved in promoting the charge separation, including the development of heterojunction between two semiconductor materials, by tailoring the photocatalysts properties. This mini-review deals with the recent developments on dyes photodegradation using as catalysts various heterojunctions based on copper sulfide nanostructures, such as copper sulfide/metal oxide, copper sulfide/metal sulfide, copper sulfide/graphene, copper sulfide/organic semiconductors etc. The effects of different parameters, such as synthesis parameters, particle size, bandgap energy, surface area, and morphology on the photocatalytic activity of copper sulfide heterojunctions for dyes degradation is also highlighted.

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Novel method of constructing CdS/ZnS heterojunction for high performance and stable photocatalytic activity

Cited by 29 publications

References 65 publications

Phase segregation via etching-induced cation migration in CoS_x–ZnS nanoarchitectures for solar hydrogen evolution

Phase segregation via etching-induced cation migration in CoS_x–ZnS nanoarchitectures for solar hydrogen evolution

Electrochemical Fingerprint of CuS-Hexagonal Chemistry from (Bis(N-1,4-Phenyl-N-(4-Morpholinedithiocarbamato) Copper(II) Complexes) as Photon Absorber in Quantum-Dot/Dye-Sensitised Solar Cells

Copper Sulfide Based Heterojunctions as Photocatalysts for Dyes Photodegradation

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Novel method of constructing CdS/ZnS heterojunction for high performance and stable photocatalytic activity

Cited by 29 publications

References 65 publications

Phase segregation via etching-induced cation migration in CoSx–ZnS nanoarchitectures for solar hydrogen evolution

Phase segregation via etching-induced cation migration in CoSx–ZnS nanoarchitectures for solar hydrogen evolution

Electrochemical Fingerprint of CuS-Hexagonal Chemistry from (Bis(N-1,4-Phenyl-N-(4-Morpholinedithiocarbamato) Copper(II) Complexes) as Photon Absorber in Quantum-Dot/Dye-Sensitised Solar Cells

Copper Sulfide Based Heterojunctions as Photocatalysts for Dyes Photodegradation

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Phase segregation via etching-induced cation migration in CoS_x–ZnS nanoarchitectures for solar hydrogen evolution

Phase segregation via etching-induced cation migration in CoS_x–ZnS nanoarchitectures for solar hydrogen evolution