Synthesis and enhanced photocatalytic property of Ni doped ZnS nanoparticles

Jothibas, M.; Manoharan, C.; Jeyakumar, S. Johnson; Praveen, P.; Punithavathy, I. Kartharinal; Richard, J.

doi:10.1016/j.solener.2017.10.055

Cited by 166 publications

(43 citation statements)

References 55 publications

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“…In fact, in some cases, the doped Ni species in sulfide and oxide semiconductors themselves could act as cocatalysts in increasing the photocatalytic H2 evolution. [336,340,[406][407][408] Further loading of the Ni-based cocatalyst over these wide spectrum semiconductors could lead to improved photocatalytic H2 evolution [258]. More interestingly, Ni 2+ -to-metal charge-transfer excitation and the substitution of Ni 2+ in semiconductor photocatalysts can narrow the bandgap energy of a semiconductor, resulting in visible-light photocatalytic activity [409,410].…”

Section: Developing Wide Spectrum Photocatalystsmentioning

confidence: 99%

Ni-based photocatalytic H2-production cocatalysts2

Shen

Xie

Xiang

et al. 2019

Chinese Journal of Catalysis

247

107

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Photocatalysis is believed to be one of the best methods to realize sustainable H2 production. However, achieving this through heterogeneous photocatalysis still remains a great challenge owing to the absence of active sites, sluggish surface reaction kinetics, insufficient charge separation, and a high thermodynamic barrier. Therefore, cocatalysts are necessary and of great significance in boosting photocatalytic H2 generation. This review will focus on the promising and appealing low-cost Ni-based H2-generation cocatalysts as the alternatives for the high-cost and low-abundance noble metal cocatalysts. Special emphasis has been placed on the design principle, modification strategies for further enhancing the activity and stability of Ni-based cocatalysts, and identification of the exact active sites and surface reaction mechanisms. Particularly, four types of modification strategies based on increased light harvesting, enhanced charge separation, strengthened interface interaction, and improved electrocatalytic activity have been thoroughly discussed and compared in detail. This review may open a new avenue for designing highly active and durable Ni-based cocatalysts for photocatalytic H2 generation.

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Section: Developing Wide Spectrum Photocatalystsmentioning

confidence: 99%

Ni-based photocatalytic H2-production cocatalysts2

Shen

Xie

Xiang

et al. 2019

Chinese Journal of Catalysis

247

107

View full text Add to dashboard Cite

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“…It may also happen because of the lack of adequate amount of energy required by atoms to reach to a suitable site in crystallite formation. As the particles become smaller, the width of peaks becomes larger and vice versa 24 25 …”

Section: Resultsmentioning

confidence: 99%

Graphene‐doped ZnS nanoparticles synthesized via hydrothermal route for enhanced electrocatalytic performance

Bhushan

Jha

Bhardwaj

et al. 2021

Int J Applied Ceramic Tech

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Energy and ecological issues increase high stress on the growth of a sustainable energy system. Better electrocatalysts is an imperative way to achieve this goal. This manuscript highlights the electronic energy state and surface area engineering of zinc sulfide (ZnS) in the nanoscale regime. These properties make ZnS, an appropriate electrocatalyst for various energy applications. It was attained by controlling the concentration of graphene into ZnS nanoparticles. Graphene‐doped ZnS nanoparticles were synthesized by simple hydrothermal route. Graphene hugely affects the structural, surface, optical, and electrochemical properties of ZnS nanoparticles. Here, 10% doping of graphene into ZnS nanoparticles double its surface area, and consequently, all other properties get varied. This sample shows the highest specific surface area of 143.05 m2/g and the highest pore diameter value of 6.02 nm. Electrocatalytic performance for synthesized samples has been verified using electrochemical impedance spectra (EIS) and cyclic voltammetry (CV) analysis. Using CV data analysis, peak current response with scan rate suggests that synthesized samples with higher graphene concentration have poor capacitive behavior. ZnS with 10% concentration of graphene possesses the highest capacitive behavior due to the fast transfer of charge/ions. Rate of flow of charge/ions into or on the electrodes is measured by a quantity called diffusion coefficient, have been calculated. Hence, the optimization of the doping concentration of graphene on ZnS is essential to obtain enhanced properties for energy applications. Also, the large concentration of graphene shield the absorption of electrolyte on ZnS surface, leading to weak electrocatalytic performance. EIS analysis reveals that smaller solution resistance and charge transfer resistance values are a sign of better electrical conductivity and electrocatalytic activity of the electrode materials. Various other characteristics studies like field emission scanning electron microscopy (FESEM), Fourier transform infrared (FTIR), and X‐ray photoelectron spectroscopy (XPS) have been done to confirm graphene‐doped ZnS nanoparticles’ formation and compare the properties variation from pure ZnS to graphene‐doped ZnS nanoparticles.

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“…using homemade photoreactors. MB was selected because of its strong adsorption to metal oxide surfaces, welldefined optical absorption, and good resistance to light degradation (Jothibas et al 2018). The photocatalytic experiments were carried out at an initial pH of 7.0 (Nakhate et al 2010 et al (2015) studied the decolorization of MB solution using TiO 2 Degussa P25 and the process resulted in approximately 45% activity under visible light after 5 h of irradiation for the decolorization of MB.…”

Section: Photocatalytic Decolorization Of Methylene Bluementioning

confidence: 99%

Preparation and Characterization of Copper, Iron, and Nickel Doped Titanium Dioxide Photocatalysts for Decolorization of Methylene Blue

Qaderi¹,

Mamat²,

Jalil³

2021

JSM

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The visible-light response is a necessary condition for titanium dioxide (TiO2) photocatalyst to function as a visible light active photocatalyst. This condition can be solved by investigation of the bandgaps and the optimization of doping levels of multivalency metal-doped TiO2. In this study, pure and Cu, Fe, and Ni-doped TiO2 photocatalysts were prepared by the sol‐gel method. The photocatalysts were characterized using XRD, FTIR, FESEM, EDX, N2 physisorption, and UV‐Vis spectrophotometry techniques. The XRD patterns of all pure TiO2 and Cu/TiO2, Fe/TiO2, and Ni/TiO2samples showed the dominant structure of the anatase TiO2 phase. The presence of functional groups at the interface of TiO2 particles was showed by FTIR. The FESEM analysis showed that the particle size of the prepared samples was uniform with spherical morphology. EDX results showed that TiO2 has successfully incorporated Cu, Fe, and Ni metals onto its surface. The BET analysis showed that the specific surface area of the doped samples increased with the amount of doping. The optical properties of all samples were carried out using UV-DRS measurements and their obtained bandgap energies were in the range of 3.22 - 3.42 eV. The pure TiO2 displayed more than 98% and 97% decolorization rates for MB solution at the end of irradiation time of 5 h under UV and visible light, respectively. Among the doped samples, 3 mol% Ni/TiO2 and Cu/TiO2 demonstrated the highest photocatalytic activity (97.65%) under UV light and 6 mol% Ni/TiO2 under visible light for MB (96.86%) decolorization.

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Synthesis and enhanced photocatalytic property of Ni doped ZnS nanoparticles

Cited by 166 publications

References 55 publications

Ni-based photocatalytic H2-production cocatalysts2

Ni-based photocatalytic H2-production cocatalysts2

Graphene‐doped ZnS nanoparticles synthesized via hydrothermal route for enhanced electrocatalytic performance

Preparation and Characterization of Copper, Iron, and Nickel Doped Titanium Dioxide Photocatalysts for Decolorization of Methylene Blue

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