scholarly journals Hydrothermal Synthesis of MoS2/rGO Heterostructures for Photocatalytic Degradation of Rhodamine B under Visible Light

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Thi Thuy Trang Phan ◽  
Thi Thanh Huong Nguyen ◽  
Ha Tran Huu ◽  
Thanh Tam Truong ◽  
Le Tuan Nguyen ◽  
...  
Keyword(s):  
Visible Light ◽  
Rhodamine B ◽  
Life Time ◽  
Absorption Capacity ◽  
Mass Ratio ◽  
Hydrothermal Temperature ◽  
Synthesis Conditions ◽  
Photodegradation Efficiency ◽  
Reduced Graphene ◽  
Structure Morphology

MoS2/rGO composites were synthesized by hydrothermal method from the precursors of MoS2 and reduced graphene oxide (rGO) prepared in the former steps. The influence of the synthesis conditions including hydrothermal temperature and mass ratio of MoS2 to rGO on the structure, morphology, and optical absorption capacity of the MoS2/rGO composites was systematically investigated using physicochemical characterizations. The photocatalytic performance of as-prepared samples was investigated on the degradation of Rhodamine B under visible light, in which, the composites obtained at hydrothermal temperature of 180°C and MoS2/rGO mass ratio of 4/1 exhibited the highest photodegradation efficiency of approx. 80% after 4 hours of reaction. This enhancement in photocatalytic behaviour of composites could be assigned to the positive effect of rGO in life time expansion of photoinduced electrons—holes.

Preparation of Bi1-xLaxVO4 and its Photocatalytic Degradation on Rhodamine B

2016 ◽  
Vol 852 ◽  
pp. 1473-1476
Author(s):  
Yan Ding ◽  
Liang Fang Fu ◽  
Yu Huan Wang ◽  
Liang Chao Li ◽  
Juan Bi Li
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Degradation Rate ◽  
Light Sensitivity ◽  
Structure Morphology ◽  
Photocatalytic Activities ◽  
Testing Techniques ◽  
Composition Structure

A series of photocatalyst Bi1-xLaxVO4 (0.1, 0.3, 0.5, 0.7) powders were prepared by hydrothermal method. The composition, structure, morphology and photocatalytic activity of the samples were researched by means of modern testing techniques. Bi1-xLaxVO4 showed excellent visible-light sensitivity and photocatalytic activities. The degradation rate of sample with x = 0.5 on rhodamine B reached 90 %, which was much higher than that of pure BiVO4.

scholarly journals Synthesis of BiSI/Ag2CO3 Composite Material for Photocatalytic Degradation of Rhodamine B under Visible Light

2021 ◽  
Author(s):  
Rui Zhang ◽  
ziyin chen ◽  
Chen Zhao ◽  
Kunlin Zeng ◽  
Lu Cai ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Photocatalytic Performance ◽  
Electrochemical Impedance ◽  
Diffuse Reflectance Spectroscopy ◽  
Mass Ratio ◽  
X Ray ◽  
Visible Light Driven

Abstract A novel binary BiSI/Ag2CO3 photocatalyst with excellent visible light-driven photocatalytic performance was prepared. The products were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS) and electrochemical impedance spectroscopy (EIS). The photocatalytic activity of the samples were evaluated by photocatalytic degradation of rhodamine B(RhB) under the irradiation of visible light. The results showed that the BiSI improves the photocatalytic activity of BiSI/Ag2CO3. Moreover, when the mass ratio of BiSI in BiSI/Ag2CO3 composites was 40%, the as-prepared BiSI/Ag2CO3 composite exhibited the best photocatalytic activity for degrading RhB. Finally, the possible mechanism for photodegradation over the BiSI/Ag2CO3 composites is also proposed.

scholarly journals TiO2Nanocatalysts Supported on a Hybrid Carbon-Covered Alumina Support: Comparison between Visible Light and UV Light Degradation of Rhodamine B

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Mphilisi M. Mahlambi ◽  
Ajay K. Mishra ◽  
Shivani B. Mishra ◽  
Rui W. Krause ◽  
Bhekie B. Mamba ◽  
...  
Keyword(s):  
Visible Light ◽  
Rhodamine B ◽  
Uv Light ◽  
Reaction Rate Constant ◽  
Titania Nanoparticles ◽  
Impregnation Method ◽  
Alumina Support ◽  
Photodegradation Efficiency ◽  
Carbon Covered Alumina ◽  
Hybrid Carbon

Titania nanoparticles were successfully supported on carbon-covered alumina (CCA) supports via the impregnation method to form carbon-covered alumna titania (CCA/TiO2). The CCA supports were synthesised through an equilibrium adsorption of toluene 2,4-diisocyante where the N=C=O irreversibly adsorbs on the alumina and pyrolysis at 700°C affords CCA supports. These CCA/TiO2nanocatalysts were tested for their photocatalytic activity both under UV and visible light using Rhodamine B as a model pollutant. The reaction rate constant of the CCA/TiO2was found to be higher than that of unsupported titania and the reaction kinetics were found to follow an apparent first-order rate law. The CCA/TiO2nanocatalysts had a much larger surface area than the unsupported titania and they exhibited overall higher photodegradation efficiency under both UV and visible light than unsupported TiO2.

Enhanced photocatalytic degradation of Rhodamine B by reduced graphene oxides modified Bi12TiO20 under visible light

2017 ◽  
Vol 29 (6) ◽  
pp. 4668-4674 ◽  
Author(s):  
Chiyuan Hui ◽  
Yongping Pu ◽  
Jing Wan ◽  
Yisong Guo ◽  
Chenwei Cui
Keyword(s):  
Visible Light ◽  
Photocatalytic Degradation ◽  
Rhodamine B ◽  
Graphene Oxides ◽  
Reduced Graphene ◽  
Reduced Graphene Oxides

Novel assembly of homogeneous reduced graphene oxide-doped mesoporous TiO 2 hybrids for elimination of Rhodamine-B dye under visible light irradiation

2017 ◽  
Vol 698 ◽  
pp. 819-827 ◽  
Author(s):  
Jing-Jie Zhang ◽  
Xi Liu ◽  
Tong Ye ◽  
Guang-Ping Zheng ◽  
Xiu-Cheng Zheng ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Visible Light Irradiation ◽  
Rhodamine B ◽  
Light Irradiation ◽  
Reduced Graphene ◽  
Rhodamine B Dye

scholarly journals Enhanced photocatalytic performance of Nb doped TiO2/reduced graphene oxide nanocomposites over rhodamine B dye under visible light illumination

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Neradabilli Prabhakarrao ◽  
Tirukkovalluri Siva Rao ◽  
Kapuganti Venkata Divya Lakshmi ◽  
Gorli Divya ◽  
Genji Jaishree ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Rhodamine B ◽  
Photocatalytic Performance ◽  
Diffuse Reflectance Spectroscopy ◽  
Light Exposure ◽  
Light Illumination ◽  
Reduced Graphene

AbstractThe present study discusses the synthesis of Nb doped TiO2/reduced graphene oxide (rGO) intercalated nanocomposites via sol-gel route at a lower temperature by using different loading amounts of graphene oxide (GO) (1 to 10 wt%). The synthesized composite materials were further characterized by copious instruments such as X-ray Diffractometer, UV-Vis Diffuse Reflectance Spectroscopy, Scanning Electron Microscopy, Transmission Electron Microscopy, Brunauer-Emmett-Teller surface area analysis, Raman and Fourier Transform-Infrared Spectroscopy. The experimental results stated that the Nb doped TiO2 nanoparticles uniformly distributed on the surface of rGO with an interfacial linking bond between TiO2 and rGO. Later, the photocatalytic degradation of Rhodamine B (RhB) dye using produced materials under visible light irradiation was examined. These results revealed that Nb doped TiO2/rGO nanocomposites exhibited better photocatalytic performance than Nb doped TiO2 for the removal of RhB dye. However, among all, the nanocomposite having 5 wt% of GO content achieves the highest degradation efficiency for RhB dye approximately 98% under visible light exposure. Altogether, the unique properties such as electron accepting and transporting properties of GO in the nanocomposite is caused to enhance photocatalytic activity by minimizing the charge carrier’s recombination rate.

Highly photodegradation of organic dye pollutant RhB using TiO2-modified reduced graphene oxide

2021 ◽  
Author(s):  
Rahmat Hidayat ◽  
Sayekti Wahyuningsih ◽  
Ganjar Fadillah ◽  
Ari Handono Ramelan
Keyword(s):  
Graphene Oxide ◽  
Visible Light ◽  
Reduced Graphene Oxide ◽  
Surface Area ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
X Ray Diffraction ◽  
Process Step ◽  
Photodegradation Efficiency ◽  
Reduced Graphene

Abstract TiO2-modified reduced graphene oxide (TiO2-rGO) has been studied in one-process step synthesis via the hydrothermal method. In this study, the various concentrations of rGO were investigated and characterized by fourier transform infrared (FTIR), x-ray diffraction (XRD), scanning electron microscope (SEM), surface area analyzer (SAA), thermogravimetric analysis/differential thermal analysis (TGA/DTA), and spectroscopy UV-Vis. In addition, the photodegradation of rhodamine-B was studied by a batch system under visible light irradiation at wavelength 554 nm. The optimum experimental results showed that the presence of rGO in TiO2 nanostructures could improve the specific surface area until 248.58 m2 g− 1 and enhanced the photodegradation efficiency until 70.66% under visible light irradiation. The photocatalyst stability was evaluated for five cycles experiment and the performance have reduced 6.58% efficiency.

Effect of Hydrothermal Conditions on Crystal Structure, Morphology and Visible-Light Driven Photocatalysis of WO3 Nanostructures

2020 ◽  
Vol 993 ◽  
pp. 893-898
Author(s):  
Yang Si Liu ◽  
Xiao Li Xi ◽  
Zuo Ren Nie ◽  
Lin Yan Zhao ◽  
You Shu Fan
Keyword(s):  
Crystal Structure ◽  
Visible Light ◽  
Photocatalytic Performance ◽  
Hydrothermal Conditions ◽  
Hydrothermal Temperature ◽  
One Dimensional ◽  
Triclinic Phase ◽  
Structure Morphology ◽  
Visible Light Driven ◽  
Treatment Application

Tungsten trioxide (WO3) nanostructures were synthesized by a hydrothermal method, and the influence of essential hydrothermal conditions, temperature and time, on their crystal structure, morphology and visible-light driven photocatalysis was studied. The hydrothermal temperature was varied from 120 °C to 200 °C, and the hydrothermal time changed from 12 h to 32 h. The crystal structure, morphology and photocatalytic performance of WO3 nanostructures were characterized by XRD, SEM and UV-Vis. The crystal structure of WO3 nanostructure was triclinic phase and their morphology was mainly one dimensional nanorods. Methylene blue was used as the target to evaluate their photocatalytic performance under visible light (λ>420 nm). The photocatalytic results suggest the suitable hydrothermal conditions to synthesize WO3 nanostructures for the wastewater treatment application.

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