Photocatalytic properties of Cu2(Fe,Mn)SnS4 microspheres synthesized via hydrothermal method

2020 ◽  
Author(s):  
Edyta Waluś ◽  
Maciej Manecki
Keyword(s):  
Wastewater Treatment ◽  
Photocatalytic Activity ◽  
Hydrothermal Method ◽  
Uv Light ◽  
Structural Features ◽  
Sulfide Mineral ◽  
Organic Dye ◽  
Photocatalytic Properties ◽  
Light Illumination ◽  
Potential Candidate

<p>The most industrial activities, that require organic dye materials for their applications, release a remarkable fraction of effluent water. As a result, serious environmental problems emerge due to the toxicity of many compounds which these industrial processes produce. The development of inexpensive and green methods for degradation of such organic dye laden water constitutes a landmark for the mitigation or even the elimination of the industrial sewage. Among many strategies, photocatalysis is regarded as the most viable one due to its usage of sunlight to decomposing organic pollutants.</p><p>The unlimited applications of nanocrystalline semiconductor materials in all sorts of technological fields, whether photochemical, biological, photovoltaic or photocatalysis have pushed to develop a new assortment of materials featuring novel properties for advanced applications. Semiconductor properties of stannite Cu<sub>2</sub>FeSnS<sub>4</sub> make it a potential candidate for application in photocatalytic industry. In nature, it is a common sulfide mineral which is formed as a result of hydrothermal processes. Its crystal structure allows for numerous substitutions including replacement of Fe by Mn.</p><p>In this report, the photocatalytic activity of  Cu<sub>2</sub>FeSnS<sub>4</sub> (CFTS) and Cu<sub>2</sub>MnSnS<sub>4</sub> (CMTS) synthetic microspheres for degradation of environment polluting dye such as methylene blue (MB) has been explored under UV light illumination. The unique morphology of the as-synthesized nanomaterial is expected to play a major role in tailoring the optical and electrical properties for the possible photo-voltaic application. The photocatalytic activity shows the potential use of this material as an efficient photocatalyst for wastewater treatment.</p><p>Modified stannite was synthesized by hydrothermal method using reactions of metal salts and sulfur in hot ethylene glycol at presence PVP solution in an autoclave at 195<sup>o</sup>C. The crystallinity, structural features, morphology and chemical composition were investigated using XRD, Raman, FTIR, and SEM - EDS. Synthetic Cu<sub>2</sub>(Fe,Mn)SnS<sub>4</sub> solid solutions are composed of spheres 1 – 1.5 µm in size, with rough surface and concentric internal structure. The structure matches hexagonal stannite. The promising optoelectrical and photocatalytic properties of CFTS and CMTS microspheres make them a potential candidate for photovoltaics as well as for effective wastewater treatment, providing further study has to be carried out to improve specific properties.</p><p>Financial support for the research was provided by Polish Ministry of Higher Education grant No. DI2016 004946 under "Diamond Grant" program.</p>

ZnO Tetrapods for Potential Photocatalytic Dye Degradation

2018 ◽  
Vol 779 ◽  
pp. 97-101 ◽  
Author(s):  
Shynggys Sadyk ◽  
Timur Sh. Atabaev
Keyword(s):  
Photocatalytic Activity ◽  
Electron Microscope ◽  
Dye Degradation ◽  
Uv Light ◽  
Photocatalytic Properties ◽  
Light Illumination ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Photocatalytic Dye Degradation ◽  
Scanning Electron

In this study, a facile method was used to prepare ZnO tetrapods for potential dye degradation applications. Field emission scanning electron microscope (FESEM), energy-dispersive X-ray spectroscopy (EDX) and UV-Vis spectroscopy were employed to investigate the morphology, chemical composition, and photocatalytic properties of prepared ZnO tetrapods. A Rhodamine B (RB) dye was used as a model dye to study the photocatalytic activity of the prepared sample. It was shown that RB dye can be efficiently degraded in the presence of ZnO tetrapods under continuous UV-light illumination. Thus, prepared ZnO tetrapods with excellent photocatalytic properties can be potentially used in wastewater treatment.

Highly Photocatalytic Properties Observed in 4ZnO·B2O3·H2O under UV-Light for MB, RhB and MO Degradation

2014 ◽  
Vol 809-810 ◽  
pp. 872-877 ◽  
Author(s):  
Liu Qing Yang ◽  
Jian Feng Huang ◽  
Xin Gang Kong ◽  
Li Yun Cao ◽  
Jia Yin Li ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Phase Composition ◽  
Hydrothermal Method ◽  
Diffuse Reflectance ◽  
Uv Light ◽  
Band Gaps ◽  
Photocatalytic Properties ◽  
Zinc Borate ◽  
Ph Values ◽  
Optical Band Gaps

Zinc borate (4ZnO·B2O3·H2O) crystallites at diverse pH values were prepared by a hydrothermal method. The phase composition, morphologies and photocatalytic properties of the samples were characterized by XRD, SEM, UV–vis spectro-scopy and UV–vis diffuse reflectance spectro-scopy. Results show that the 4ZnO·B2O3·H2O microcrystalline obtained at pH=9 shows a new clintheriforms morphologies assembled by nanowiskers. Superior UV-light photocatalytic activity of the samples for MB, RhB and MO is observed especially higher than that of P25 for MB. These samples exhibit morphology-related ultraviolet absorbing ability with different optical band gaps from 4.01 eV to 4.22 eV. Band gaps are responsible for the highly UV-light photocatalytic activity.

scholarly journals Sheet-on-belt branched TiO2(B)/rGO powders with enhanced photocatalytic activity

2018 ◽  
Vol 9 ◽  
pp. 1550-1557 ◽  
Author(s):  
Huan Xing ◽  
Wei Wen ◽  
Jin-Ming Wu
Keyword(s):  
Photocatalytic Activity ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Charge Separation ◽  
Reaction Rate ◽  
Uv Light ◽  
Three Dimensional ◽  
Reaction Rate Constant ◽  
Light Illumination ◽  
Reduced Graphene

TiO2(B) is usually adopted to construct phase junctions with anatase TiO2 for applications in photocatalysis to facilitate charge separation; its intrinsic photocatalytic activity, especially when in the form of one- or three-dimensional nanostructures, has been rarely reported. In this study, a sheet-on-belt branched TiO2(B) powder was synthesized with the simultaneous incorporation of reduced graphene oxide (rGO). The monophase, hierarchically nanostructured TiO2(B) exhibited a reaction rate constant 1.7 times that of TiO2(B)/rGO and 2.9 times that of pristine TiO2(B) nanobelts when utilized to assist the photodegradation of phenol in water under UV light illumination. The enhanced photocatalytic activity can be attributed to the significantly increased surface area and enhanced charge separation.

Photocatalytic properties of Bi/BiOCl heterojunctions synthesized using an in situ reduction method

2014 ◽  
Vol 38 (10) ◽  
pp. 4913-4921 ◽  
Author(s):  
Jiajia Hu ◽  
Guangqing Xu ◽  
Jinwen Wang ◽  
Jun Lv ◽  
Xinyi Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Reduction Method ◽  
Uv Light ◽  
Photocatalytic Properties ◽  
In Situ Reduction ◽  
Light Activity ◽  
Bi Nanoparticles

Bi nanoparticles on BiOCl nanosheets, synthesized via in situ reduction, enhance the UV light photocatalytic activity and achieve visible light activity.

One-pot low-temperature synthesis of TiO2 nanowire/rGO composites with enhanced photocatalytic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (96) ◽  
pp. 94092-94097 ◽  
Author(s):  
Huan Xing ◽  
Wei Wen ◽  
Jin-Ming Wu
Keyword(s):  
Photocatalytic Activity ◽  
Reaction Rate ◽  
Uv Light ◽  
Reaction Rate Constant ◽  
Light Illumination ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis ◽  
One Pot ◽  
Tio2 Nanowire

In situ growth of TiO2 nanowires on graphene oxide was achieved at 80 °C in an open atmosphere. The optimized TiO2/rGO hybrid exhibited a reaction rate constant 5.5 times that of TiO2 nanowires towards photodegradations of rhodamine B in water under the UV light illumination.

Photocatalytic Activity of Bare and Amine-Treated TiO2 Nanoparticles

2013 ◽  
Vol 1578 ◽  
Author(s):  
Fahim Hossain ◽  
Oscar Perales Perez ◽  
Sangchul Hwang
Keyword(s):  
Photocatalytic Activity ◽  
Environmental Remediation ◽  
Particle Concentration ◽  
Uv Light ◽  
Synthesis Method ◽  
Treatment Protocol ◽  
Processing Route ◽  
Light Illumination ◽  
Significant Activity ◽  
Photo Degradation

ABSTRACTThe capability of tuning the functional properties of nanosize TiO2 nanoparticles (NPs) by suitable control of surface chemistry, phase stability and crystal size plays a key role on their safe use and enhanced efficacy in actual and envisioned applications, including nanomedicine, environmental remediation, and food safety, among others. On this basis, any attempt to develop a size-controlled synthesis method and an efficient surface treatment protocol becomes indispensable. Accordingly, we have synthesized TiO2 NPs via a modified aqueous processing route using HNO3 as a catalyst and polyvinylpyrrolidone as particle size controller and a dispersing agent. The NPs surface was treated by using Ethylenediamine (EDA) as a source for amine species. Bare and amine-treated TiO2 NPs were characterized by X-ray diffraction (XRD) and FTIR spectroscopy. The photocatalytic activity of TiO2 NPs was assessed by irradiating an aqueous solution of Methylene Blue (MB) dye containing different amounts of the NPs. XRD analyses evidenced the formation of two phases of crystalline TiO2 with an average crystallite size estimated at 15.3 nm. Bare and amine-treated TiO2 NPs exhibited significant activity under UV light illumination (365 nm). Bare NPs exhibited a dye photo degradation capability of about 38.02% with particle concentration of 0.5 g/l while amine-treated NPs reported 66.18% dye photo degradation capability with particle concentration of 0.5 g/l.

Photoactive TiO2Containing Paper: Preparation and Its Photocatalytic Activity under Weak UV Light Illumination

1995 ◽  
Vol 24 (9) ◽  
pp. 767-768 ◽  
Author(s):  
Hirokazu Matsubara ◽  
Makoto Takada ◽  
Shinichi Koyama ◽  
Kazuhito Hashimoto ◽  
Akira Fujishima
Keyword(s):  
Photocatalytic Activity ◽  
Uv Light ◽  
Light Illumination

Preparation, Characterization and Photocatalytic Properties of Ag-Loaded Bi2WO6

2013 ◽  
Vol 750-752 ◽  
pp. 1091-1097
Author(s):  
Xiao Ming Gao ◽  
Feng Fu ◽  
Feng Xing Niu ◽  
Li Ping Zhang
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Hydrothermal Method ◽  
Noble Metal ◽  
Visible Light Irradiation ◽  
Orthorhombic Phase ◽  
Blue Shift ◽  
Light Irradiation ◽  
Photocatalytic Properties ◽  
Significant Enhancement

Ag-loaded Bi2WO6nanoparticles were prepared by hydrothermal method. The products were characterized by XRD, UV-vis DRS, SEM and BET. The results indicated that it was the orthorhombic phase of Bi2WO6and showed a markedly blue-shift Compared with pure Bi2WO6. Ag/Bi2WO6photocatalysts exhibited obviously enhanced photocatalysis than pure Bi2WO6in degrading phenol-containingwastewater under visible light irradiation. The influence of the content of silver on the photocatalyticactivity of Bi2WO6has been investigated. The resultsrevealed that the significant enhancement of photocatalytic activity can beattributed to the synergetic effects between noble metal and semiconductor component.

scholarly journals Preparation and Photocatalytic Activity of TiO2/Fine Char for Removal of Rhodamine B

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Mingjie Ma ◽  
Weijie Guo ◽  
Zhengpeng Yang ◽  
Shanxiu Huang ◽  
Guanyu Wang
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Uv Light ◽  
Sol Gel ◽  
Tetrabutyl Titanate ◽  
Light Illumination ◽  
X Ray Diffraction ◽  
X Ray ◽  
Uv Light Irradiation

TiO2/fine char (FC) photocatalyst was prepared via sol-gel method with tetrabutyl titanate as the precursor and FC as the carrier. The structural property of TiO2/FC photocatalyst was investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM), and the photocatalytic activity of TiO2/FC was evaluated by photocatalytic degradation of rhodamine B (RhB) aqueous solution under UV light irradiation. The results showed that TiO2was successfully coated on the surface of FC, and the TiO2/FC photocatalyst had better photocatalytic efficiency and stability for degradation of RhB under UV light illumination as compared to that of the pure TiO2and FC. The study provided a novel way for the application of FC to the photocatalytic degradation of organic wastes.

Solvothermal Synthesis of TiO2 Hollow Microsphere and Its Photocatalytic Properties

2011 ◽  
Vol 356-360 ◽  
pp. 345-348
Author(s):  
Jin Guo Wang ◽  
Jian Zhu ◽  
Xi Li ◽  
He Xing Li
Keyword(s):  
Photocatalytic Activity ◽  
Solvothermal Synthesis ◽  
Solvothermal Method ◽  
Uv Light ◽  
Hollow Structure ◽  
Hollow Microsphere ◽  
Hollow Microspheres ◽  
Photocatalytic Properties ◽  
Multiple Reflections ◽  
Facile Solvothermal Method

TiO2hollow microspheres were synthesized by a facile solvothermal method. The prepared samples were characterized by the XRD, SEM, TEM, BET and UV-vis. The results showed that the TiO2hollow microspheres offered an enhanced photocatalytic activity due to the multiple reflections of the UV light within the inner hollow structure.

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