Rational construction of ZnO/CuS heterostructures-modified PVDF nanofiber photocatalysts with enhanced photocatalytic activity

Zang, Chuanfeng; Chen, Hao; Han, Xiangye; Zhang, Wei; Wu, Junfang; Liang, Fanghua; Dai, Jiamu; Liu, Hongchao; Zhang, Guangyu; Zhang, Ke‐Qin; Ge, Mingzheng

doi:10.1039/d2ra06151a

Cited by 10 publications

(3 citation statements)

References 68 publications

(78 reference statements)

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“…For example, in the CuS case, Zhang et al found that the band gap of PVDF/TiO changed from 3.4 to 2.4 eV by adding 0.05 mmol of CuS . Also, Zang et.al, found that the band gap is 3.3 eV for PVDF/CuS, which is close to ours. It is worth mentioning here that we added a very small amount of PVDF (10%) that changes the energy band gap to 3.07 where the band gap of pVDF is 5.66 eV, as mentioned in the text.…”

Section: Resultssupporting

confidence: 84%

Nanosynthesis and Characterization of Cu_1.8Se_0.6S_0.4 as a Potential Cathode for Magnesium Battery Applications

Mohammad H. Al Sulami,

Alsabban,

Al-Sulami

et al. 2023

Langmuir

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Copper selenide (Cu–Se) and copper sulfide (Cu–S) are promising cathodes for magnesium-ion batteries. However, the low electronic conductivity of Cu–Se system results in a poor rate capability and unsatisfactory cycling performance. Mg-ion batteries based on the Cu–S cathode exhibited large kinetic barriers during the recharging process owing to the presence of polysulfide species. This work attempts to circumvent this dilemma by doping Cu1.8Se by sulfur, which replaces the selenium in the CuSe lattice to form Cu1.8Se0.6S0.4 nanocrystalline powder. The presence of sulfur will increase the electronic conductivity, and the presence of selenium will mitigate the effect of polysulfide species that hinder the kinetics of Mg2+. Herein, a Cu1.8Se0.6S0.4 nanocrystalline powder was synthesized by the solid-state reaction, yielding a highly pure and stoichiometric powder. The crystallographic structure of the nanopowder and the conversion-type storage mechanism have been attested via ex situ X-ray diffraction and energy-dispersive X-ray analysis. The nanocrystalline feature of Cu1.8Se0.6S0.4 was demonstrated by high-resolution transmission electron microscopy. An apparent surface morphology change during the charging/discharging process has been visualized by a field emission scanning electron microscope. Diffuse reflectance spectroscopy has discussed the variation of the band gap during charging and discharging. The full Mg/Cu1.8Se0.6S0.4 cells presented an initial discharge capacity of 387.99 mAh g– 1 at a current density of 0.02 mA cm–2; moreover, they show moderate diffusion kinetics with ≈ 10–15 cm–2 s–1.

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Section: Resultssupporting

confidence: 84%

Nanosynthesis and Characterization of Cu_1.8Se_0.6S_0.4 as a Potential Cathode for Magnesium Battery Applications

Mohammad H. Al Sulami,

Alsabban,

Al-Sulami

et al. 2023

Langmuir

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“…Innovative photocatalysts composed of PVDF/ZnO/CuS were developed using electrospinning, hydrothermal treatment, and ion exchange techniques with the purpose to address the issue of particle aggregation in an aqueous environment (Zang et al 2022 ). These photocatalysts demonstrated excellent stability during recycling and reuse.…”

Section: Methods Used For Zno Nanostructure Preparation and Their Cha...mentioning

confidence: 99%

“…2 SEM images of a PVDF, b ZnO@PVDF, and c PVDF/ZnO/CuS nanocomposites. d – f TEM images and g EDX mapping of PVDF/ZnO/CuS nanocomposites (Zang et al 2022 ) (open access) …”

Section: Methods Used For Zno Nanostructure Preparation and Their Cha...mentioning

confidence: 99%

ZnO nanostructured matrix as nexus catalysts for the removal of emerging pollutants

Matei,

Șăulean,

Râpă

et al. 2023

Environ Sci Pollut Res

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Water pollution stands as a pressing global environmental concern, elevating the significance of innovative, dependable, and sustainable solutions. This study represents an extensive review of the use of photocatalytic zinc oxide nanoparticles (ZnO NPs) for the removal of emerging pollutants from water and wastewater. The study examines ZnO NPs’ different preparation methods, including physical, chemical, and green synthesis, and emphasizes on advantages, disadvantages, preparation factors, and investigation methods for the structural and morphological properties. ZnO NPs demonstrate remarkable properties as photocatalysts; however, their small dimensions pose an issue, leading to potential post-use environmental losses. A strategy to overcome this challenge is scaling up ZnO NP matrices for enhanced stability and efficiency. The paper introduces novel ZnO NP composites, by incorporating supports like carbon and clay that serve as photocatalysts in the removal of emerging pollutants from water and wastewater. In essence, this research underscores the urgency of finding innovative, efficient, and eco-friendly solutions for the removal of emerging pollutants from wastewater and highlights the high removal efficiencies obtained when using ZnO NPs obtained from green synthesis as a photocatalyst. Future research should be developed on the cost–benefit analysis regarding the preparation methods, treatment processes, and value-added product regeneration efficiency. Graphical Abstract

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Enhancement of electrical properties by CuS–PVP nanocomposite on the ZnO/polymer heterojunction

Verma,

Hmar,

Swart

et al. 2024

J Chinese Chemical Soc

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A nanocomposite matrix of covellite–polyvinylpyrrolidone (CuS–PVP) was synthesized through a solution processing method and applied via spin coating onto hydrothermally grown zinc oxide (ZnO) nanorods. Characterization techniques, including X‐ray powder diffraction and scanning electron microscopy, confirmed the successful decoration of chain‐like CuS–PVP polymer composites onto hexagonal ZnO nanorods. The UV‐vis spectroscopy revealed an absorption peak at 372 nm, indicating excitonic absorption of ZnO, and a reduction in the band gap from 3.11 to 2.59 eV upon CuS–PVP polymer decoration, enhancing light harvesting efficiency. Photoluminescence spectra demonstrated the lowest charge carrier recombination rate in the ZnO/CuS–PVP sample, promoting efficient charge separation and transportation, supported by Fourier‐transform infrared analysis indicating chemical bonding. Subsequently, the impact of CuS–PVP as an insertion layer in the ZnO/poly(3,4‐ethylenedioxythiophene)‐poly(styrenesulfonate) (PEDOT:PSS) inorganic–organic heterojunction was investigated. Favorable band alignment between ZnO, CuS–PVP, and PEDOT:PSS improved conduction, increasing current from 0.3394 to 1.14 mA for D2 (poly‐ethyleneterephthalate/Indium tin oxide/ZnO/PEDOT:PSS/Al) and D1 (poly‐ethyleneterephthalate/Indium tin oxide/ZnO/CuS–PVP/PEDOT:PSS/Al) at a +2 V bias. Transient photo‐responses (J–t) at 0 V bias revealed decreased rise and fall times from 0.382 and 1.154 s to 0.301 and 0.229 s for D2 and D1 devices, respectively. This novel approach provides control over charge carrier transport characteristics at the interface, potentially benefiting self‐powered photo‐detection in optoelectronic devices.

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Rational construction of ZnO/CuS heterostructures-modified PVDF nanofiber photocatalysts with enhanced photocatalytic activity

Abstract: The PVDF/ZnO/CuS heterostructured photocatalysts with excellent photocatalytic performance under UV and visible light irradiation were prepared by hydrothermal and ion-exchange techniques using PVDF nanofiber membranes as the substrate.

Cited by 10 publications

References 68 publications

Nanosynthesis and Characterization of Cu_1.8Se_0.6S_0.4 as a Potential Cathode for Magnesium Battery Applications

Nanosynthesis and Characterization of Cu_1.8Se_0.6S_0.4 as a Potential Cathode for Magnesium Battery Applications

ZnO nanostructured matrix as nexus catalysts for the removal of emerging pollutants

Enhancement of electrical properties by CuS–PVP nanocomposite on the ZnO/polymer heterojunction

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Rational construction of ZnO/CuS heterostructures-modified PVDF nanofiber photocatalysts with enhanced photocatalytic activity

Abstract: The PVDF/ZnO/CuS heterostructured photocatalysts with excellent photocatalytic performance under UV and visible light irradiation were prepared by hydrothermal and ion-exchange techniques using PVDF nanofiber membranes as the substrate.

Cited by 10 publications

References 68 publications

Nanosynthesis and Characterization of Cu1.8Se0.6S0.4 as a Potential Cathode for Magnesium Battery Applications

Nanosynthesis and Characterization of Cu1.8Se0.6S0.4 as a Potential Cathode for Magnesium Battery Applications

ZnO nanostructured matrix as nexus catalysts for the removal of emerging pollutants

Enhancement of electrical properties by CuS–PVP nanocomposite on the ZnO/polymer heterojunction

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Product

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Nanosynthesis and Characterization of Cu_1.8Se_0.6S_0.4 as a Potential Cathode for Magnesium Battery Applications

Nanosynthesis and Characterization of Cu_1.8Se_0.6S_0.4 as a Potential Cathode for Magnesium Battery Applications