Carbothermal synthesis of biochar-supported metallic silver for enhanced photocatalytic removal of methylene blue and antimicrobial efficacy

2021 ◽  
Vol 401 ◽  
pp. 123382
Author(s):  
Jun Shi ◽  
Jun Wang ◽  
Lebin Liang ◽  
Zhen Xu ◽  
Yu Chen ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Antimicrobial Efficacy ◽  
Metallic Silver ◽  
Carbothermal Synthesis ◽  
Photocatalytic Removal

Encapsulation of a hexaaza macrocyclic nickel(ii) complex in zeolite Y: an experimental and theoretical investigation

2017 ◽  
Vol 41 (17) ◽  
pp. 9505-9512 ◽  
Author(s):  
Singaravelu Chandra Mohan ◽  
Rajadurai Vijay Solomon ◽  
Ponnambalam Venuvanalingam ◽  
Kandasamy Jothivenkatachalam
Keyword(s):  
Methylene Blue ◽  
Visible Light ◽  
Theoretical Investigation ◽  
Zeolite Y ◽  
Photocatalytic Removal ◽  
Macrocyclic Nickel

In this study, a 1,8-dimethyl-1,3,6,8,10,13-hexaazacyclotetradecane nickel(ii) complex was encapsulated in the supercages of zeolite Y for the photocatalytic removal of methylene blue under visible light.

scholarly journals Photocatalytic removal of methylene blue using titania- and silica-coated magnetic nanoparticles

2018 ◽  
Vol 5 (6) ◽  
pp. 065518 ◽  
Author(s):  
Sawsan Dagher ◽  
Ahmed Soliman ◽  
Aiman Ziout ◽  
Nacir Tit ◽  
Ali Hilal-Alnaqbi ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Magnetic Nanoparticles ◽  
Photocatalytic Removal

scholarly journals Catalytic Oxidation of Methylene Blue by Use of Natural Zeolite-Based Silver and Magnetite Nanocomposites

Processes ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. 471 ◽  
Author(s):  
Aldiyar Kuntubek ◽  
Nurassyl Kinayat ◽  
Kulyash Meiramkulova ◽  
Stavros G. Poulopoulos ◽  
Joseph C. Bear ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Catalytic Oxidation ◽  
Natural Zeolite ◽  
Reaction Rate ◽  
Silver Oxide ◽  
Reaction Order ◽  
Physical Adsorption ◽  
Metallic Silver ◽  
H2o2 Concentration ◽  
20 Nm

This work reports the synthesis of natural zeolite-based silver and magnetite nanocomposites and their application for the catalytic oxidation of methylene blue in water. The zeolite was impregnated with 5.5 wt.% Fe in the form of magnetite nanoparticles with size of 32 nm, and with 6.4 wt.% Ag in the form of silver oxide and metallic silver nanoparticles with sizes of 42 and 20 nm, respectively. The results showed that physical adsorption contributed to the removal of methylene blue by 25–36% and that Fe3O4@NZU is superior to Ag2O@NZU and Ag0@NZU, leading to 55% removal without oxidant and 97% in the presence of H2O2. However, there is no evidence of significant mineralization of methylene blue. The application of reaction rate models showed that the reaction order changes from zero to first and second order depending on the H2O2 concentration.

scholarly journals Rapid Solar-Light Driven Superior Photocatalytic Degradation of Methylene Blue Using MoS2-ZnO Heterostructure Nanorods Photocatalyst

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2254 ◽  
Author(s):  
Ritika ◽  
Manjot Kaur ◽  
Ahmad Umar ◽  
Surinder Mehta ◽  
Surinder Singh ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Photocatalytic Performance ◽  
Hexagonal Phase ◽  
Rhombohedral Phase ◽  
Active Species ◽  
Charge Carriers ◽  
Pseudo First Order Reaction ◽  
First Order ◽  
Photocatalytic Removal ◽  
Wurtzite Hexagonal Phase

Herein, MoS2-ZnO heterostructure nanorods were hydrothermally synthesized and characterized in detail using several compositional, optical, and morphological techniques. The comprehensive characterizations show that the synthesized MoS2/ZnO heterostructure nanorods were composed of wurtzite hexagonal phase of ZnO and rhombohedral phase of MoS2. The synthesized MoS2/ZnO heterostructure nanorods were used as a potent photocatalyst for the decomposition of methylene blue (MB) dye under natural sunlight. The prepared MoS2/ZnO heterostructure nanorods exhibited ~97% removal of MB in the reaction time of 20 min with the catalyst amount of 0.15 g/L. The kinetic study revealed that the photocatalytic removal of MB was found to be in accordance with pseudo first-order reaction kinetics with an obtained rate constant of 0.16262 min−1. The tremendous photocatalytic performance of MoS2-ZnO heterostructure nanorods could be accredited to an effective charge transportation and inhibition in the recombination of photo-excited charge carriers at an interfacial heterojunction. The contribution of active species towards the decomposition of MB using MoS2-ZnO heterostructure nanorods was confirmed from scavenger study and terephthalic acid fluorescence technique.

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