scholarly journals Copper (II) Heterocyclic Thiosemicarbazone Complexes as Single-Source Precursors for the Preparation of Cu9S5 Nanoparticles: Application in Photocatalytic Degradation of Methylene Blue

Catalysts ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 61
Author(s):  
Adrien P. Yepseu ◽  
Thomas Girardet ◽  
Linda D. Nyamen ◽  
Solenne Fleutot ◽  
Kevin I. Y. Ketchemen ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Copper Sulphide ◽  
Single Source ◽  
Visible Spectroscopy ◽  
Single Source Precursors ◽  
X Ray ◽  
Degradation Rates ◽  
Uv Visible

In this study, two copper(II) complexes, [Cu(C6H8N3S2)2]Cl2 (1) and [Cu(C7H10N3S2)2]Cl2·H2O (2), were synthesized from 2-(thiophen-2-ylmethylene)hydrazine-1-carbothioamide (L1H) and 2-(1-(thiophen-2-yl)ethylidene)hydrazine-1-carbothioamide (L2H) respectively and characterized using various spectroscopic techniques and elemental analyses. The as-prepared complexes were used as single-source precursors for the synthesis of oleylamine-capped (OLA@CuxSy), hexadecylamine-capped (HDA@CuxSy), and dodecylamine-capped (DDA@CuxSy) copper sulphide nanoparticles (NPs) via the thermolysis method at 190 °C and 230 °C and then characterized using powder X-ray diffraction (p-XRD), UV-visible spectroscopy, transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The p-XRD diffraction patterns confirmed the formation of crystalline rhombohedral digenite Cu9S5 with the space group R-3m. The TEM images showed the formation of nanoparticles of various shapes including hexagonal, rectangular, cubic, truncated-triangular, and irregularly shaped Cu9S5 nanomaterials. The SEM results showed aggregates and clusters as well as the presence of pores on the surfaces of nanoparticles synthesized at 190 °C. The UV-visible spectroscopy revealed a general blue shift observed in the absorption band edge of the copper sulphide NPs, as compared to bulk CuxSy, with energy band gaps ranging from 2.52 to 3.00 eV. Energy-dispersive X-ray spectroscopy (EDX) confirmed the elemental composition of the Cu9S5 nanoparticles. The nanoparticles obtained at 190 °C and 230 °C were used as catalysts for the photocatalytic degradation of methylene blue (MB) under UV irradiation. Degradation rates varying from 47.1% to 80.0% were obtained after 90 min of exposure time using only 10 mg of the catalyst, indicating that Cu9S5 nanoparticles have potential in the degradation of organic pollutants (dyes).

scholarly journals Decolorization of Methylene Blue by Ag/SrSnO3 Composites under Ultraviolet Radiation

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Patcharanan Junploy ◽  
Titipun Thongtem ◽  
Somchai Thongtem ◽  
Anukorn Phuruangrat
Keyword(s):  
Electron Microscopy ◽  
Methylene Blue ◽  
Uv Radiation ◽  
Photoelectron Spectroscopy ◽  
Separation Process ◽  
X Ray Diffraction ◽  
Electron Hole ◽  
X Ray ◽  
Negative Effect ◽  
Uv Visible

SrSn(OH)6 precursors synthesized by a cyclic microwave radiation (CMR) process were calcined at 900°C for 3 h to form rod-like SrSnO3. Further, the rod-like SrSnO3 and AgNO3 in ethylene glycol (EG) were ultrasonically vibrated to form rod-like Ag/SrSnO3 composites, characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electron microscopy (EM), Fourier transform infrared (FTIR) spectroscopy, and UV-visible analysis. The photocatalyses of rod-like SrSnO3, 1 wt%, 5 wt%, and 10 wt% Ag/SrSnO3 composites were studied for degradation of methylene blue (MB, C16H18N3SCl) dye under ultraviolet (UV) radiation. In this research, the 5 wt% Ag/SrSnO3 composites showed the highest activity, enhanced by the electron-hole separation process. The photoactivity became lower by the excessive Ag nanoparticles due to the negative effect caused by reduction in the absorption of UV radiation.

Synthesis and Characterization of Poly(azomethine)/ZnO Nanocomposite Toward Photocatalytic Degradation of Methylene Blue, Malachite Green, and Bismarck Brown

2019 ◽  
Vol 141 (5) ◽  
Author(s):  
S. J. Pradeeba ◽  
K. Sampath
Keyword(s):  
Methylene Blue ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Malachite Green ◽  
Fourier Transform Infrared ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Natural Sunlight ◽  
Uv Visible

This research was carried out based on the significance of protecting the environment by preventing the contamination of water caused from effluents discharge from dyeing industries, effective nanocomposite were prepared to solve this problem. The poly(azomethine), ZnO, and poly(azomethine)/ZnO nanocomposites were prepared and characterized by Fourier transform-infrared spectroscopy, ultraviolet (UV)–visible spectroscopy, powder X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDAX), scanning electron Microscope (SEM), and transmission electron microscopy (TEM) techniques. Methylene blue (MB), Malachite green (MG), and Bismarck brown (BB) were degraded from water using poly(azomethine) (PAZ), zinc oxide (ZnO), PAZ/ZnO (PNZ) nanocomposites as photocatalyst in the presence of natural sunlight. The degradation efficiency and reaction kinetics were calculated, and the outcome of the photocatalytic experiments proved that the PAZ/ZnO nanocomposites reveals excellent photocatalytic activity and effective for decolorization of dye containing waste water than PAZ and ZnO in the presence of natural sunlight. The maximum degradation efficiency 97%, 96%, and 95% was obtained for PNZ nanocomposites at optimum dosage of catalyst as 500 mg and 50 ppm of MB, MG, and BB dye concentration, respectively. The maximum degradation time was 5 h. After photocatalytic study, the samples were characterized by Fourier-transform infrared spectroscopy (FT-IR) and UV–visible spectroscopy.

A Facile Method for the Synthesis of Silver Nanoparticles in the Presence of Sodium Phosphate

2011 ◽  
Vol 109 ◽  
pp. 174-177 ◽  
Author(s):  
Yu Li Shi ◽  
Qi Zhou ◽  
Li Yun Lv ◽  
Wang Hong
Keyword(s):  
Electron Microscopy ◽  
Silver Nanoparticles ◽  
Sodium Phosphate ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Stabilizing Agents ◽  
Transmission Electron ◽  
Silver Nps ◽  
Uv Visible

A facile method for the synthesis of silver nanoparticles (NPs) has been developed by using sodium phosphate (Na3PO4) as stabilizing agents and glucose the reducing agent, respectively. The obtained silver NPs have been characterized by X-ray diffraction (XRD), UV-visible spectroscopy (UV-vis) and transmission electron microscopy (TEM). It was found that in the presence of sodium phosphate, silver NPs with different morphologies and sizes were obtained. The formation mechanism of diverse silver NPs was studied preliminarily.

Preparation of Polyaniline Supported TiO2 Photocatalyst and its Photocatalytic Property

2011 ◽  
Vol 356-360 ◽  
pp. 524-528 ◽  
Author(s):  
Chun Ling Yu ◽  
Rui Xue Wu ◽  
Ying Huan Fu ◽  
Xiao Li Dong ◽  
Hong Chao Ma
Keyword(s):  
Electron Microscopy ◽  
Hydrothermal Process ◽  
Photocatalytic Property ◽  
Visible Spectrum ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
Anthraquinone Dye ◽  
X Ray ◽  
Transmission Electron ◽  
Uv Visible

A polyaniline supported titanium dioxide photocatalyst was prepared by an impregnation-hydrothermal process and characterized by powder X-ray diffraction, transmission electron microscopy and UV-visible spectroscopy. It was found that the TiO2 nanoparticles were well dispersed on the surface of the polyaniline and the photocatalyst has a stronger absorption compared with that of pure TiO2 over the whole of the visible spectrum. The photocatalyst exhibited higher photocatalytic activity than pure TiO2 for the photodegradation of solutions of the anthraquinone dye, reactive brilliant blue KN-R, under visible light irradiation.

scholarly journals Differential surface characterizations of cotton fibers coated with TiO2 and ZnO nanoparticles for nano-based analysis of fabrics

2021 ◽  
Vol 16 ◽  
pp. 155892502110438
Author(s):  
Parshuram Singh ◽  
Sapna Balayan ◽  
Rajendra Kumar Sarin ◽  
Utkarsh Jain
Keyword(s):  
Electron Microscopy ◽  
Uv Light ◽  
Natural Fibers ◽  
Vital Role ◽  
Cotton Fibers ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Uv Visible ◽  
Unit Component ◽  
Scanning Electron

Fibers are the unit component for product development. They can be divided into two types: synthetic and natural fibers. Recently, emerging nanotechnology has played a vital role in advancing next-generation fabrics. The nanomaterials provide several unique properties such as higher conductivity, self-cleaning, water-resistant, and others. Owing to their advanced properties, the fabrics are being developed by coating and integrating with nanomaterials. Therefore, in the presented work two cotton samples were modified with titanium dioxide (TiO2) and zinc oxide (ZnO). These samples were further examined under various techniques including scanning electron microscopy (SEM), UV-visible spectroscopy, X-ray fluorescence (XRF), and Fourier-transform infrared spectroscopy (FTIR). Furthermore, these samples were evaluated at varying wavelengths with UV light and the obtained results demonstrated that the nano-coated fiber samples can be differentiated at 365 nm.

scholarly journals Sunlight Assisted Degradation of Methylene Blue as a Model Dye using Bismuth Oxychloride Nanoparticles: Ecofriendly and Industry Efficient Photocatalysis for Waste Chemical Treatment

2019 ◽  
Vol 32 (1) ◽  
pp. 115-121
Author(s):  
Chandan Adhikari ◽  
Mandeep Kaur ◽  
Ravichandran
Keyword(s):  
Methylene Blue ◽  
Dye Degradation ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Bismuth Oxychloride ◽  
Fourier Transformed Infrared Spectroscopy ◽  
Different Types ◽  
Photocatalytic Dye Degradation ◽  
Uv Visible

In this study, an efficient sunlight triggered dye degradation was demonstrated using methylene blue as a model dye and bismuth oxychloride nanoparticles were used as photocatalyst. Two different types of nanoparticles, nanoflower and nanodisk, were prepared to understand the effect of morphology on the photocatalysis. Both the particles were prepared following a straightforward and easy methodology from readily available chemicals. The particles were characterized using scanning electron microscope, Fourier transformed infrared spectroscopy, powder X-ray diffraction. UV-visible spectroscopy and colorimeter were used to evaluate the photocatalytic activity of the catalyst. Both the nanoparticles were able to degrade the dye completely within 3-4 h under visible light. The photocatalytic rate constant analysis demonstrates that out of two morphology, nanoflower is found to be more effective than nanodisk towards dye degradation. The sunlight was also used to understand whether the photocatalyst can degrade the dye or not in presence of sunlight only. Both nanoparticles were able to degrade the dye 100 % in presence of sunlight within maximum 4 h. The photocatalytic dye degradation in presence of sunlight was conducted in between 10 a.m. to 4 p.m. when the maximum amount of sunlight is available with high intensity and energy. The catalysts were 100 % active after the first cycle and upto four cycles the dye degradation efficiency remain around 60-80%. The study demonstrates that sunlight can degrade the dye in presence of these photocatalyst which clearly indicates its energy saving approach thus making it more economic and green methodology for the industries.

Microwave Irradiation Synthesis of Sb2S3 and its Optical Characteristic

2016 ◽  
Vol 839 ◽  
pp. 136-141
Author(s):  
Arrak Klinbumrung ◽  
Chalermchai Pilapong ◽  
Tawat Suriwong
Keyword(s):  
Electron Microscopy ◽  
Microwave Irradiation ◽  
Optical Characteristic ◽  
Hydroxyethyl Cellulose ◽  
X Ray Diffraction ◽  
Energy Band Gap ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Uv Visible ◽  
Scanning Electron

Antimony sulfide (Sb2S3) nanostructure was synthesized using a 600 W microwave irradiation technique. The precursors including Sb(CH3CO2)3 and Na2S2O3.5H2O were dissolved into 50 mL ethylene glycol (EG) solution with containing 0 and 1 g of hydroxyethyl cellulose (HEC). Phase, morphology and optical properties of the as-synthesized products were determined by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-visible spectroscopy and photoluminescence (PL). Energy band gap of Sb2S3 nanostructure exhibits the value of 1.90 and 2.06 eV for synthesizing condition with and without HEC containing, respectively.

Photocatalytic Degradation of Methylene Blue and Methyl Orange over TiO2 Powder Synthesized via the Solvothermal Method

2015 ◽  
Vol 749 ◽  
pp. 51-55
Author(s):  
Pongthep Jansanthea ◽  
Natkritta Boonprakob ◽  
Jaruwan Treenattip ◽  
Pusit Pookmanee ◽  
Sukon Phanichphant
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Photocatalytic Degradation ◽  
Solvothermal Method ◽  
Ammonium Hydroxide ◽  
Titanium Isopropoxide ◽  
Mixed Solution ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray

Titanium dioxide (TiO2) powder was synthesized via the solvothermal method. Titanium isopropoxide (C12H28O4Ti), ammonium hydroxide (NH4OH) and nitric acid (HNO3) were used as the starting materials. The mixed solution was diluted with ethanol (C2H5OH) and heated at 100°C for 5h in a Teflon–lined stainless steel autoclave vessel. The phase transition of TiO2 powder was studied by X–ray diffraction (XRD). The morphology and chemical composition of TiO2 powder were investigated by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The photocatalytic degradation of methylene blue and methyl orange over TiO2 powder were determined using Ultraviolet–visible spectroscopy (UV–Vis).

scholarly journals Biosynthesis of Silver Nanoparticles UsingKedrostis foetidissima (Jacq.) Cogn.

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
M. Amutha ◽  
P. Lalitha ◽  
M. Jannathul Firdhouse
Keyword(s):  
Electron Microscopy ◽  
Aqueous Solution ◽  
Silver Nanoparticles ◽  
Room Temperature ◽  
Ftir Analysis ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Higher Temperature ◽  
Uv Visible ◽  
Scanning Electron

Nanosilver was synthesized using the aqueous solution of solvent extracts of leaf and stem ofKedrostis foetidissima. Three different methods of formation of silver nanoparticles such as reaction at (i) room temperature, (ii) higher temperature, and (iii) sonication were employed in the present study. The synthesized silver nanoparticles were characterized by UV-visible spectroscopy, X-ray diffractometer, Scherrer’s formula, scanning electron microscopy, and FTIR analysis.

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