scholarly journals Synthesis of Zn3(VO4)2/BiVO4 heterojunction composite for the photocatalytic degradation of methylene blue organic dye and electrochemical detection of H2O2

RSC Advances ◽  
2018 ◽  
Vol 8 (62) ◽  
pp. 35403-35412 ◽  
Author(s):  
Muhammad Munir Sajid ◽  
Sadaf Bashir Khan ◽  
Naveed Akthar Shad ◽  
Nasir Amin
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Electrochemical Detection ◽  
Organic Dye ◽  
Molar Concentration ◽  
Hydrothermal Route ◽  
Concentration Ratios

In this study, a Zn3(VO4)2/BiVO4 heterojunction nanocomposite photocatalyst was prepared using a hydrothermal route with different molar concentration ratios.

scholarly journals Enhanced Photocatalytic Performance in Chromium(VI) Reduction and Dye Degradation using Sn3O4/SnS2 Nanocomposite and Mechanism Insight

2021 ◽  
Author(s):  
Gandharve Kumar ◽  
Rajkumar Dutta
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Dye Degradation ◽  
Degradation Products ◽  
Degradation Mechanism ◽  
Reaction Medium ◽  
Blue Dye ◽  
Ros Scavenging ◽  
Hydrothermal Route ◽  
Inorganic Species

Abstract Detection of residual organic and inorganic species in water bodies including drinking water has led to developing strategies for their removal. Here we report a very efficient method of photoreduction of Cr (VI) and photodegradation of methylene blue dye in aqueous medium using Z-scheme heterojunction based Sn3O4/SnS2 solar photocatalyst. The photocatalyst is synthesized by hydrothermal route and it is thoroughly characterized in terms of its structural, compositional, morphological and optical properties. About 100 % of Cr (VI) reduction in 60 min and 99.6 % of methylene blue degradation in 90 min is achieve under sunlight exposure at a photocatalytic rate of 0.066 min-1 and 0.043 min-1, respectively. The total organic carbon estimation of the post-degradation reaction medium corresponded to 85.1 % (MB) mineralization. The photocatalytic degradation is attributed to in-situ generation of reactive oxygen species (ROS) e.g., superoxide radicals, hydroxide radicals, and the role of ROS towards reduction and degradation of Cr (VI) and MB respectively, is confirmed from ROS scavenging studies. The dye degradation mechanism has been discussed by analyzing the degradation products via UPLC-Q-Tof-MS. The photocatalytic degradation of methylene blue by Sn3O4/SnS2 nanocomposites is significantly enhanced as compared to SnS2 photocatalyst, attributed to Z-scheme heterojunction and the charge carrier mobility.

Photocatalytic degradation of methylene blue in ZIF-8

RSC Advances ◽  
2014 ◽  
Vol 4 (97) ◽  
pp. 54454-54462 ◽  
Author(s):  
Huan-Ping Jing ◽  
Chong-Chen Wang ◽  
Yi-Wen Zhang ◽  
Peng Wang ◽  
Ran Li
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Organic Dye

ZIF-8 was used to perform photocatalytic degradation of methylene blue, a typical organic dye.

Photocatalytic Degradation of Methylene Blue (MB) over α-Fe2O3 Nanospindles Prepared by a Hydrothermal Route

2019 ◽  
Vol 48 (5) ◽  
pp. 2978-2985 ◽  
Author(s):  
Xuan Hoa Vu ◽  
Luong Huu Phuoc ◽  
Nguyen Dac Dien ◽  
Thi Thu Ha Pham ◽  
Luong Duy Thanh
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Hydrothermal Route

scholarly journals Photocatalytic Remediation of Methylene Blue and Antibacterial Activity Study Using Schiff Base - Cu Complexes

2021 ◽  
Author(s):  
Fathima Fasna P H ◽  
Sreesha Sasi ◽  
Bindu Sharmila T K ◽  
Julie Chandra C S ◽  
Jolly V Antony ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Degradation ◽  
Organic Dyes ◽  
Dye Degradation ◽  
Low Cost ◽  
Organic Dye ◽  
Effluent Treatment ◽  
Diffusion Method ◽  
Antibacterial Screening ◽  
Organic Dye Degradation

Abstract Photocatalytic degradation of organic dyes under visible light and ultraviolet radiation is an efficient strategy for effluent treatment. This work describes the design of novel Cu(II) complexes using the ligand N'-(3-hydroxy-4-methoxybenzylidene)nicotinohydrazide and their application in the photocatalytic degradation of the organic dye, methylene blue (MB). The photocatalytic degradation of MB follows pseudo first-order kinetics with high correlation coefficient values (R2> 0.95), making them useful as simple and low-cost organic dye degradation agents. The antibacterial screening studies of the ligand and the Cu(II) complexes by disc diffusion method show the systems to exhibit activity against Escherichia coli (gram negative) and Bacillus circulans (gram positive).

Photocatalytic degradation of methylene blue from aqueous solutions using nanopillars-TiO2 thin films: Batch reactor studies

2018 ◽  
Vol 18 (3) ◽  
pp. 81-91 ◽  
Author(s):  
C. Lalhriatpuia
Keyword(s):  
Thin Films ◽  
Methylene Blue ◽  
Photocatalytic Activity ◽  
Organic Carbon ◽  
Photocatalytic Degradation ◽  
Batch Reactor ◽  
Tio2 Thin Films ◽  
Initial Concentration ◽  
Bet Specific Surface Area ◽  
Interfering Ions

Nanopillars-TiO2 thin films was obtained on a borosilicate glass substrate with (S1) and without (S2) polyethylene glycol as template. The photocatalytic behaviour of S1 and S2 thin films was assessed inthe degradation of methylene blue (MB) dye from aqueous solution under batch reactor operations. The thin films were characterized by the SEM, XRD, FTIR and AFM analytical methods. BET specific surface area and pore sizes were also obtained. The XRD data confirmed that the TiO2 particles are in its anatase mineral phase. The SEM and AFM images indicated the catalyst is composed with nanosized pillars of TiO2, evenly distributed on the surface of the substrate. The BET specific surface area and pore sizes of S1 and S2 catalyst were found to be 5.217 and 1.420 m2/g and 7.77 and 4.16 nm respectively. The photocatalytic degradation of MB was well studied at wide range of physico-chemical parameters. The effect of solution pH (pH 4.0 to 10.0) and MB initial concentration (1.0 to 10.0 mg/L) was extensively studied and the effect of several interfering ions, i.e., cadmium nitrate, copper sulfate, zinc chloride, sodium chloride, sodium nitrate, sodium nitrite, glycine, oxalic acid and EDTA in the photocatalytic degradation of MB was demonstrated. The maximum percent removal of MB was observed at pH 8.0 beyond which it started decreasing and a low initial concentration of the pollutant highly favoured the photocatalytic degradation using thin films and the presence of several interfering ions diminished the photocatalytic activity of thin films to some extent. The overall photocatalytic activity was in the order: S2 > S1 > UV. The photocatalytic degradation of MB was followed the pseudo-first-order rate kinetics. The mineralization of MB was studied with total organic carbon measurement using the TOC (total organic carbon) analysis.

Visible Light Active Ce-doped TiO2 Nanoparticles for Photocatalytic Degradation of Methylene Blue

2016 ◽  
Vol 13 (1) ◽  
pp. 110-116 ◽  
Author(s):  
Rani P. Barkul ◽  
Farah-Naaz A. Shaikh ◽  
Sagar D. Delekar ◽  
Meghshyam K. Patil
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Tio2 Nanoparticles ◽  
Doped Tio2 ◽  
Visible Light Active

scholarly journals Synthesis and characterization of 2-D La-doped Bi2O3 for photocatalytic degradation of organic dye and pesticide

2021 ◽  
Vol 6 ◽  
pp. 100030
Author(s):  
Subhash D. Khairnar ◽  
Anil N. Kulkarni ◽  
Sachin G. Shinde ◽  
Sunil D. Marathe ◽  
Yogesh V. Marathe ◽  
...  
Keyword(s):  
Photocatalytic Degradation ◽  
Organic Dye ◽  
Synthesis And Characterization ◽  
La Doped

scholarly journals Fabrication of AgCl/Ag3PO4/graphitic carbon nitride heterojunctions for enhanced visible light photocatalytic decomposition of methylene blue, methylparaben and E. coli

RSC Advances ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 6383-6394 ◽  
Author(s):  
Haishuai Li ◽  
Linlin Cai ◽  
Xin Wang ◽  
Huixian Shi
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Light Irradiation ◽  
Graphitic Carbon Nitride ◽  
Photocatalytic Decomposition ◽  
E Coli ◽  
Visible Light Photocatalytic

A noval ternary nanocomposite AgCl/Ag3PO4/g-C3N4 was successfully synthesized for photocatalytic degradation of methylene blue, methylparaben and inactivation of E. coli under visible light irradiation, showing excellent photocatalytic degradation performance and stability.

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