The present work states the removal of organic compound using CuS photocatalyst under visible light irradiation. The CuS photocatalysts were synthesized by hydrothermal method by using copper nitrate as copper precursor and thiourea, sodium thiosulphate as sulfur precursors via hydrothermal route. The reaction was carried out at 150. °C for 24. h using water as a solvent. The prepared CuS nanostructures were analyzed by X-ray diffraction, FE-SEM, photoluminescence (PL), UV-vis spectroscopy and Fourier transform infrared spectroscopy (FT-IR). A detailed mechanism on the effect of sulfur source on CuS morphology has been elucidated. The catalytic process efficiency mainly depends upon the adsorption and electron transfer between the dye molecules. The successive decrement in the absorbance at 400. nm shows the effective decrease in 4-nitrophenol pollutant as monitored by UV-vis spectrophotometer. The as prepared CuS catalyst showed highly efficient and versatile photocatalytic activities as well as excellent recyclability in degrading organic contaminant viz. nitrobenzene and 4-nitrophenol under visible light irradiation.

James Jebaseelan Samuel E

Department of Physics

School of Advanced Sciences

Vellore Campus

Nirmala Grace A

Centre for Nanotechnology Research

Saranya M

Ramachandran R

Jeong S.K

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

Powder Technology

The spread of a wide range of contaminants in surface water and groundwater has become a critical issue worldwide due to population growth, industrialization, and long-term droughts. It is necessary to control the harmful effects of these contaminants and improve the human living environment. There is a need for the development of various technologies and adsorbents to remove toxic pollutants from water. Among the various nanoadsorbents, nanoscale magnetite particles (approximately one billion times smaller [by volume] than microscale particles) are being extensively researched for the treatment of water and wastewater. The present chapter deals with the utilization of iron oxide nanomaterials for water purification in light of their unique properties (such as extremely small size, high surface-area-to-volume ratio, surface modifiability and excellent magnetic properties). Nanomaterials such as iron oxide nanoparticles are efficient adsorbents because they combine magnetic separation with ionic exchange capacity for heavy metal removal. A number of environmental cleanup technologies have been proposed in wastewater treatment with the use of iron oxide nanomaterials as nanosorbents and photocatalysts. In addition, iron-oxide-based immobilization technology for enhancing removal efficiency of hazardous materials tends to be an innovative research point. This chapter outlines the recent developments in the application of iron oxide nanomaterials for water treatment. A detailed review is addressed to the utilization of iron oxide nanomaterials as nanoadsorbents as well as their utility as photocatalysts. The practical potential and likely environmental fate when iron oxide nanomaterials are discharged is also discussed. © 2019 Elsevier Inc. All rights reserved..

Nanoscale Materials in Water Purification

Iron Oxide Nanomaterials for Water Purification

Copper sulphide (CuS) nanomaterials with interesting morphology were synthesised using copper nitrate trihydrate, thiourea and water as a solvent by a simple hydrothermal route. A systematic investigation was carried out to investigate the effect of reaction time (5, 16 and 24 h) at 150°C on the morphology of the materials. Without the use of any template or additives, shape controlled synthesis of CuS nanocrystallites were achieved. The possible mechanism for the formation of the various nanostructures of CuS in this system is discussed. The prepared materials were characterised by X-ray diffraction, field emission scanning electron microscopy (FE-SEM) and DRS-UV-Vis absorption analysis. The UV-Vis spectrum shows that it is the promising material which can absorb in the visible region and hence could be used for photocatalytic applications. In addition, the electrochemical characteristic of the synthesised material was investigated by cyclic voltammetric analysis, which shows that CuS could be used for electrocatalytic applications. © 2014 Copyright Taylor and Francis Group, LLC.

Fulltext

Journal of Experimental Nanoscience

Synthesis and characterisation of CuS nanomaterials using hydrothermal route

CuS nanostructures have been prepared by hydrothermal route using copper nitrate and thiourea as copper and sulfur precursors. Investigations were done to probe the effect of cationic surfactant viz. cetyl trimethyl ammonium bromide on the morphology of the products. Further studies have been done to know the influence of reaction time on the morphology of CuS nanostructures. Results demonstrated that the morphology of CuS was influenced by the reaction time and surfactant. X-ray diffraction pattern showed that the as-prepared CuS nanostructures were in pure hexagonal phase and UV-vis spectra reveal a strong absorption in the visible region of 400-800. nm. A detailed mechanism has been elucidated for the growth of CuS nanostructures. The photocatalytic activity was evaluated by the decolorization of methylene blue (MB) dye under visible-light irradiation and results showed that 87% of the dye was degraded. Thus the as-prepared CuS catalysts are highly promising materials for photocatalytic applications towards dye degradation. © 2013 Elsevier B.V.

Hydrothermal growth of CuS nanostructures and its photocatalytic properties

Co9S8/graphene nanocomposites (Co9S8/G) at various concentrations of graphene and Co9S8 were prepared and tested for its electrochemical behaviour for supercapacitors.

RSC Adv.

Co9S8 nanoflakes on graphene (Co9S8/G) nanocomposites for high performance supercapacitors

Cus Nanostructures Have Been Successfully Prepared from Copper Chloride with Two Different Sulfur Sources Like Thiourea and Sodium Thiosulphate by Hydrothermal Route at 150oC. The Growth of Cus Nanostructures Were Investigated for Different Reaction Time Periods of 5 Hrs and 24 Hrs Respectively Using Water as Solvent. the as-Synthesized Cus Nanostructures Are Characterized by X-Ray Diffraction (XRD) and Field-Emission Scanning Electron Microscopy (FE-SEM). XRD Pattern Indicates that the Prepared Cus Nanomaterials Are in Pure Hexagonal Phase. Results Show that Cus Nanomaterials with Different Hierarchical Structures Like Urchins, Nanoplates Etc,. Were Obtained at Different Experimental Conditions. A Systematic Investigation of the Final End Products Has Been Done to Elucidate the Formation Mechanism at Different Experimental Parameters. The Optical Properties of the Cus Structures Were Studied by UV-Vis Absorption Analysis, which Showed Broad Absorption in the Visible Region. The Optical Band Gap of the Cus Nanomaterials Were Found as 2.2 Ev and 2.18 Ev for Different Sulfur Sources.

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Publisher	Data powered by TypesetElsevier BV
ISSN	0032-5910
Open Access	0