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Tanuj, Kumar R, Kumar S, Kalra N, Sharma S, Montaño VEA, Singh A. Sustainable and facile fabrication of chitosan-coated silver-doped zinc oxide nanocomposites exploiting Bergera koenigii foliage for enhanced photocatalysis and antibacterial activity. Int J Biol Macromol 2024; 279:135162. [PMID: 39214209 DOI: 10.1016/j.ijbiomac.2024.135162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 08/21/2024] [Accepted: 08/27/2024] [Indexed: 09/04/2024]
Abstract
Industrial and academic chemical pollutants such as Eriochrome Black-T (EBT) and murexide dyes are widely used in academic institution as well as industries, when eluted into rivers, delineate the ill effect on human and aquatic life. Herein, green and ecofriendly synthesis of silver doped-Zinc oxide nanoparticles (Ag/ZnO NPs) and chitosan coated Ag/ZnO nanoparticles (CS/Ag/ZnO NPs) using Bergera koenigii extract to solve environmental issues have been reported for the first time. Spherical and agglomerated particles with crystalline flakes like morphology of Ag/ZnO NPs and CS/Ag/ZnO NPs respectively have been ascertained by Scanning electron morphology (SEM) analyses and XRD. XRD analysis revealed the average crystallite size of 42.16 nm and 48.45 nm for Ag/ZnO NPs with 5 % and 10 % Ag concentration respectively, lesser than crystallite size of 47.394 nm and 52.38 nm for CS-5 % Ag/ZnO NC and CS-10 % Ag/ZnO NC respectively. All the synthesized NPs and NC demonstrated remarkable antibacterial potential against both gram +ve and gram -ve bacteria. Additionally, all the materials showed very high time-dependent photocatalytic degradation activity (>98 %) of EBT and murexide in 12 min. Remarkably, all active nano-catalysts exhibit high durability, and displayed recyclability for >8 cycles. In nutshell, chitosan coated nano-catalyst showed drastic improvement in photocatalytic and antibacterial activities.
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Affiliation(s)
- Tanuj
- Department of Chemistry, Himachal Pradesh University, Summerhill, Shimla 171005, H.P., India
| | - Rajesh Kumar
- Department of Chemistry, Himachal Pradesh University, Summerhill, Shimla 171005, H.P., India.
| | - Santosh Kumar
- Department of Chemistry, Himachal Pradesh University, Summerhill, Shimla 171005, H.P., India.
| | - Neerja Kalra
- Department of Chemistry, Government College, Ateli, Mahendergarh 123021, Haryana, India
| | - Subhash Sharma
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, Km 107 Carretera Tijuana-Ensenada AP 14, Ensenada 22860, B.C., Mexico
| | | | - Amritpal Singh
- Department of Pure of Applied Chemistry, Strathclyde University, Glasgow, UK
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2
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Lin X, Chen Y, Zhou D, Chen M, Liang W, Guo H. Aminated graphene quantum dots/CdS nanobelts for enhanced photocatalytic degradation of RhB dye under visible light. RSC Adv 2024; 14:255-265. [PMID: 38173581 PMCID: PMC10759265 DOI: 10.1039/d3ra06454a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 12/10/2023] [Indexed: 01/05/2024] Open
Abstract
CdS nanoparticles have wide applications as photocatalysts for degradation of organic pollutants, but due to their limited turnover number and off-pathway charge recombination processes, their degradation efficiency is low. Herein, aminated graphene quantum dots/CdS (GQDs/CdS) nanobelts were successfully fabricated by solvothermal and hydrothermal processes. The prepared GQDs/CdS were characterized by physical methods to investigate their structure, morphology, optical properties, specific surface area, element composition, and chemical state. GQDs/CdS materials promoted efficient charge separation, and showed high efficiency in the photocatalytic degradation of the organic dye Rhodamine B (RhB) under visible light. The degradation efficiency of RhB samples over 0.05 g of catalysts reached 97.40% after 150 min, a much higher efficiency in comparison to pure CdS. Electron paramagnetic resonance (EPR) spectroscopy provided direct evidence for ˙OH and ˙O2- as the reactive oxidative species using DMPO as a spin trap. Consistent with the experimental results, a possible mechanism of RhB photocatalytic degradation by GQDs/CdS under visible light was proposed. This work may provide environmentally friendly photocatalysts for degrading organic dyes and purifying water.
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Affiliation(s)
- Xiangfeng Lin
- School of Environment and Resource, Guangxi Normal University Guilin 541004 PR China
- Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions China
| | - Yu Chen
- School of Environment and Resource, Guangxi Normal University Guilin 541004 PR China
- Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions China
| | - Diwen Zhou
- School of Environmental and Chemical Engineering, Shanghai University Shanghai 200444 PR China
| | - Menglin Chen
- School of Environment and Resource, Guangxi Normal University Guilin 541004 PR China
- Guangxi Key Laboratory of Environmental Processes and Remediation in Ecologically Fragile Regions China
| | - Weixia Liang
- School of Medicine and Health, Guangxi Vocational & Technical Institute of Industry Nanning 530001 China
| | - Huazhang Guo
- School of Environmental and Chemical Engineering, Shanghai University Shanghai 200444 PR China
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3
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Sukhadeve GK, Gedam RS. Visible light assisted photocatalytic degradation of mixture of reactive ternary dye solution by Zn-Fe co-doped TiO 2 nanoparticles. CHEMOSPHERE 2023; 341:139990. [PMID: 37648162 DOI: 10.1016/j.chemosphere.2023.139990] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 08/16/2023] [Accepted: 08/25/2023] [Indexed: 09/01/2023]
Abstract
The current study deals with the synthesis of novel Zn, and Fe co-doped TiO2 photocatalyst by the sol-gel method at room temperature. The prepared photocatalysts are characterized by several standard analytical tools. X-ray diffraction (XRD) and Raman analysis verifies the tetragonal anatase phase of TiO2 in all synthesized nanoparticles. The morphology and chemical composition of ZFT_2.5 were confirmed using the Field-Emission Scanning Electron Microscope (FE-SEM) and energy dispersive X-ray (EDAX) analysis respectively. X-ray photoelectron spectroscopy (XPS) measurements verify the binding energies of a host and dopant material. The High resolution transmission electron microscopy (HR-TEM) reveals the presence of spherical nanoparticles in ZFT_2.5 photocatalyst with a diameter ranging from 8 to 20 nm. The absorption spectra of the prepared nanoparticles exhibit strong absorption in visible light. The synergistic effect created by Zn and Fe blocked the light induced charge carriers and delayed the recombination probability. The photocatalyst ZFT_2.5 was tested for photocatalytic degradation against the mixture of the three cationic dyes [rhodamine B (RhB), malachite green (MG), and methylene blue (MB)] under exposure of visible light. Total organic carbon (TOC) study was performed to evaluate the organic character of the photodegradate dye solution.
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Affiliation(s)
- G K Sukhadeve
- Department of Physics, Visvesvaraya National Institute of Technology, Nagpur, 440010, India
| | - R S Gedam
- Department of Physics, Visvesvaraya National Institute of Technology, Nagpur, 440010, India.
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4
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Sgibnev YM, Marasanov DV, Smetanin IV, Uskov AV, Kuzmenko NK, Ignatiev AI, Nikonorov NV, Baryshev AV. A comparative study of photocatalytic activity of Na +-Ag + ion-exchanged glass-ceramics with metallic Ag, semiconductor AgBr, and hybrid Ag-AgBr nanoparticles. Dalton Trans 2023; 52:12661-12667. [PMID: 37642325 DOI: 10.1039/d3dt01712e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Photocatalytic glass-ceramics doped with metallic Ag, semiconductor AgBr, and hybrid metal-semiconductor Ag-AgBr nanostructures were synthesized via low-temperature Na+-Ag+ ion exchange. The spectral features of the nanostructures in the silicate glass matrix as well as their photocatalytic performance were studied in detail. Glass-ceramics containing hybrid metal-semiconductor nanostructures were shown to possess one order of magnitude higher photocatalytic activity compared to their counterparts with metallic and semiconductor nanostructures. Hybrid metal-semiconductor nanostructures allow enhancement of the net density of photogenerated hot electrons.
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Affiliation(s)
- Y M Sgibnev
- Dukhov Research Institute of Automatics (VNIIA), Moscow, Russia.
- ITMO University, St. Petersburg, Russia
| | | | | | - A V Uskov
- P.N. Lebedev Physical Institute, Moscow, Russia
| | | | | | | | - A V Baryshev
- Dukhov Research Institute of Automatics (VNIIA), Moscow, Russia.
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5
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Song T, Wang S, Gao W, Zhang C, Xu Y, Lin X, Yang M. Construction of UiO-66-NH 2 decorated by MoS 2 QDs as photocatalyst for rapid and effective visible-light driven Cr(VI) reduction. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 263:115304. [PMID: 37506441 DOI: 10.1016/j.ecoenv.2023.115304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 07/13/2023] [Accepted: 07/23/2023] [Indexed: 07/30/2023]
Abstract
The photoactive metal-organic frameworks (MOFs) are good candidates for photocatalysts, but the quick electron-hole pairs recombination has greatly restricted the photocatalytic ability of MOFs. To improve the photoactivity of MOFs, MOFs-based composite materials have been extensively studied. Here, we successfully integrated MoS2 quantum dots (QDs) with UiO-66-NH2 for the first time under hydrothermal conditions. The as-prepared MoS2 QDs/UiO-66-NH2 (MS-U) had good visible light response ability (absorption edge at 445 nm), and charge separation and transfer ability, which lays the foundation for the photocatalytic Cr(VI) reduction. Photocatalytic studies revealed that MoS2 QDs-5/UiO-66-NH2 (MS-U-5) had superior Cr(VI) reduction activity than pure MoS2 QDs and UiO-66-NH2. MS-U-5 could remove 98% Cr(VI) at pH= 2 with visible light irradiation for 20 min, which is the fastest visible light driven Cr(VI) reduction rate among the reported MOFs-based composite photocatalysts without the presence of any cocatalysts or scavengers as far as we know. Importantly, MS-U-5 could be reused at least three times. In the end, the possible electron transfer path and mechanism of Cr(VI) reduction was also investigated.
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Affiliation(s)
- Tianqun Song
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China; Tianjin University of Technology, Tianjin 300384, China; Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Nankai University, Tianjin 300071, China
| | - Shuang Wang
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China
| | - Wanting Gao
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China
| | - Chudi Zhang
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China
| | - Yixin Xu
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China
| | - Xin Lin
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China
| | - Mei Yang
- School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China.
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6
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Al-Murish M, Autade V, Kumi-Barimah E, Panmand R, Kale B, Jha A. Engineering of Solar Energy Harvesting Tb 3+-Ion-Doped CdS Quantum Dot Glasses for Photodissociation of Hydrogen Sulfide. ACS APPLIED ENERGY MATERIALS 2023; 6:8875-8888. [PMID: 37712089 PMCID: PMC10498422 DOI: 10.1021/acsaem.3c01488] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Accepted: 08/15/2023] [Indexed: 09/16/2023]
Abstract
The photocatalytic properties of CdS quantum dots (Q-dots) and Tb3+-doped CdS Q-dots dispersed in a borosilicate glass matrix were investigated for the photodissociation of hydrogen sulfide (H2S) into hydrogen (H2) gas and elemental sulfur (S). The Q-dot-containing glass samples were fabricated using the conventional melt-quench method and isothermal annealing between 550 and 600 °C for 6 h for controlling the growth of CdS and Tb3+-ion-doped CdS Q-dots. The structure, electronic band gap, and spectroscopic properties of the Q-dots formed in the glass matrix after annealing were analyzed using Raman and UV-visible spectroscopies, X-ray powder diffraction, and transmission electron microscopy. With increasing annealing temperature, the average size range of the Q-dots increased, corresponding to the decrease of electronic band gap from 3.32 to 2.24 eV. For developing the model for photocatalytic energy exchange, the excited state lifetime and photoluminescence emission were investigated by exciting the CdS and Tb3+-doped CdS quantum states with a 450 nm source. The results from the photoluminescence and lifetime demonstrated that the Tb3+-CdS photodissociation energy exchange is more efficient from the excited Q-dot states compared to the CdS Q-dot glasses. Under natural sunlight, the hydrogen production experiment was conducted, and an increase of 26.2% in hydrogen evolution rate was observed from 0.02 wt % Tb3+-doped CdS (3867 μmol/h/0.5 g) heat-treated at 550 °C when compared to CdS Q-dot glass with a similar heat treatment temperature (3064 μmol/h/0.5 g). Furthermore, the photodegradation stability of 0.02 wt % Tb3+-CdS was analyzed by reusing the catalyst glass powders four times with little evidence of degradation.
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Affiliation(s)
- Mohanad Al-Murish
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, U.K.
| | - Vijay Autade
- Centre
for Materials for Electronics Technology (C-MET), Ministry of Electronics and Information Technology (MeitY), Off Pashan Road, Panchawati, Pune 411008, India
| | - Eric Kumi-Barimah
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, U.K.
| | - Rajendra Panmand
- Centre
for Materials for Electronics Technology (C-MET), Ministry of Electronics and Information Technology (MeitY), Off Pashan Road, Panchawati, Pune 411008, India
| | - Bharat Kale
- Centre
for Materials for Electronics Technology (C-MET), Ministry of Electronics and Information Technology (MeitY), Off Pashan Road, Panchawati, Pune 411008, India
| | - Animesh Jha
- School
of Chemical and Process Engineering, University
of Leeds, Leeds LS2 9JT, U.K.
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7
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Kumar R, Janbandhu SY, Sukhadeve GK, Gedam RS. Visible light assisted surface plasmon resonance triggered Ag/ZnO nanocomposites: synthesis and performance towards degradation of indigo carmine dye. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:98619-98631. [PMID: 36053425 DOI: 10.1007/s11356-022-22745-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Accepted: 08/22/2022] [Indexed: 06/15/2023]
Abstract
Water pollution caused by organic compounds, generated from different industries, has gained attention worldwide today. In this regard, significant efforts have been made for a suitable dye degradation technology. Zinc oxide (ZnO)-based photocatalysts are considered novel materials to degrade organic effluents in contaminated water. The facile synthesis of Ag/ZnO nanocomposites and its application for the enhanced degradation of indigo carmine (IC) dye under visible light irradiation is reported in this paper. The prepared photocatalysts were characterized using various analytical techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron (XPS) spectroscopy, FTIR, Raman, impedance study, UV-Vis, and photoluminescence (PL). Prepared Ag/ZnO nanocomposites were tested for degradation of IC dye in visible light. The degradation efficiency of IC dye was found to be 95.71% in 120 min, with a rate constant of 0.02021 min-1. This improved photocatalytic activity of Ag/ZnO nanocomposites was mainly due to the absorption of visible light caused by surface plasmon resonance (SPR) derived from Ag nanoparticles (NPs) and electron-hole separation. Radical trapping experiments suggest that holes (h+) and superoxide radical (O2•-) are the key factors in photocatalytic IC dye degradation.
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Affiliation(s)
- Rahul Kumar
- Department of Physics, Visvesvaraya National Institute of Technology, Nagpur, 440010, India
| | | | - Gaurav K Sukhadeve
- Department of Physics, Visvesvaraya National Institute of Technology, Nagpur, 440010, India
| | - Rupesh S Gedam
- Department of Physics, Visvesvaraya National Institute of Technology, Nagpur, 440010, India.
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8
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Gadore V, Mishra SR, Ahmaruzzaman M. Metal sulphides and their heterojunctions for photocatalytic degradation of organic dyes-A comprehensive review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:90410-90457. [PMID: 37474851 DOI: 10.1007/s11356-023-28753-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 07/08/2023] [Indexed: 07/22/2023]
Abstract
Water pollution caused by organic dyes is one of the greatest threats to the ecosystem. The removal of dyes from water has remained a challenge for scientists. Recently, metal sulphides have emerged as a potential candidate for water remediation applications. The efficient charge transportation, greater surface-active sites, and low bandgap of metal sulphides make them an excellent choice of semiconductor photocatalysts for degradation of dyes. This review summarises the potential application of metal sulphides and their heterojunctions for the photocatalytic degradation of organic dyes from wastewater. A detailed study has been presented on the synthesis, basics of photodegradation and heterojunctions and photocatalytic activity. The effect of the use of templates, doping agents, synthesis route, and various other factors affecting the photocatalytic activity of metal sulphides have been summarised in this review. The synthesis techniques, characterisation techniques, mechanism of degradation of organic dyes by Z-scheme heterojunction photocatalyst, reusability and stability of metal sulphides, and the scope of future research are also discussed. This study indicates that Scopus-based core gathered data could be used to give an objective overview of the global dye degradation research from 2008 to 2023 (15 years). All data (articles, authors, keywords, and publications) is compiled in the Scopus database. For the bibliometric study, 1962 papers relevant to dye photodegradation by sulfide-based photocatalysts were found, and this number rises yearly. A bibliometric analysis provides a 15-year evaluation of the state-of-the-art research on the impact of metal sulfide-based photocatalysts on the photodegradation of dyes.
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Affiliation(s)
- Vishal Gadore
- Department of Chemistry, National Institute of Technology Silchar, 788010, Silchar, Assam, India
| | - Soumya Ranjan Mishra
- Department of Chemistry, National Institute of Technology Silchar, 788010, Silchar, Assam, India
| | - Md Ahmaruzzaman
- Department of Chemistry, National Institute of Technology Silchar, 788010, Silchar, Assam, India.
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9
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Sathya Priya B, Aruchamy K, Oh TH, Avula B, Hasan I, Shanthi M. Synthesis of Solar Light Active Reduced Graphene Oxide-ZnS Nanomaterial for Photocatalytic Degradation and Antibacterial Applications. MICROMACHINES 2023; 14:1324. [PMID: 37512635 PMCID: PMC10386591 DOI: 10.3390/mi14071324] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 06/16/2023] [Accepted: 06/24/2023] [Indexed: 07/30/2023]
Abstract
Good water quality is essential for life; therefore, decolorizing and detoxifying organic dye wastes (textile effluents) have gained immense environmental importance in recent years. Thus, the degradation of wastewater has become a potential need for our environment. This research aims to synthesize and investigate a ceramic-based nanomaterial catalyst for the degradation of dye solution under exposure to sunlight. A reduced graphene oxide-ZnS (rGO-ZnS) nanomaterial was qualitatively synthesized using a solvothermal method. The prepared nanomaterial was characterized using XRD, SEM, HR-TEM, EDX, XPS, and FT-IR techniques. The photocatalytic activity of the rGO-ZnS nanomaterial was checked using oxidative photocatalytic degradation of naphthol blue black dye (NBB) under direct sunlight irradiation. Here, the rGO/ZnS composite showed a significant photocatalytic performance to degraded NBB (93.7%) under direct solar light. Chemical Oxygen Demand (COD) measurements confirmed the mineralization of the dye. The influence of different radical scavengers on NBB degradation was studied. Optimum conditions for efficient degradation were determined. The antibacterial property of the prepared catalyst was studied.
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Affiliation(s)
- B Sathya Priya
- Department of Chemistry, Annamalai University, Annamalainagar 608002, Tamil Nadu, India
| | - Kanakaraj Aruchamy
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38436, Republic of Korea
| | - Tae Hwan Oh
- School of Chemical Engineering, Yeungnam University, Gyeongsan 38436, Republic of Korea
| | - Balakrishna Avula
- Department of Chemistry, Rajeev Gandhi Memorial College of Engineering and Technology (Autonomous), Nandyal 518501, Andhra Pradesh, India
| | - Imran Hasan
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - M Shanthi
- Department of Chemistry, Annamalai University, Annamalainagar 608002, Tamil Nadu, India
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10
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Photoluminescence Performance and Photocatalytic Activity of Modified Carbon Quantum Dots Derived from Pluronic F127. Polymers (Basel) 2023; 15:polym15040850. [PMID: 36850134 PMCID: PMC9959664 DOI: 10.3390/polym15040850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/04/2023] [Accepted: 02/06/2023] [Indexed: 02/11/2023] Open
Abstract
The photocatalytic degradation of organic dyes in waste water using carbon quantum dots (CQDs) remains a hot topic due to the importance of environmental protection. However, identifying suitable carbon resources and successful surface modification are still challenging. Herein, the hydrothermal method and surface modification of ammonia and thionyl chloride were applied to synthesize CQDs with different surface groups using PEO106PPO70PEO106 (Pluronic F127) as a carbon source. The average particle size of the as-prepared CQDs was in the range of 2.3-3.5 nm. The unmodified CQDs had the highest relative photoluminescence intensity, while all as-prepared CQDs exhibited abnormal photoluminescence located outside the scope of the visible spectrum. Interestingly, CQDs modified with ammonia achieved a degradation rate of 99.13% (15 d) for 50 mg/L indigo carmine solution, while CQDs modified with thionyl chloride reached a degradation rate of 97.59% (15 d) for light green SF yellowish solution. Therefore, in this work, two typical organic dyes can be effectively photocatalytically degraded by as-prepared CQDs, with suitable surface modification.
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Janbandhu S, Patra U, Sukhadeve G, Kumar R, Gedam R. Photocatalytic performance of glasses embedded with Ag-TiO2 quantum dots on photodegradation of indigo carmine and eosin Y dyes in sunlight. INORG CHEM COMMUN 2023. [DOI: 10.1016/j.inoche.2022.110317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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12
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Optical Dynamics of Copper-Doped Cadmium Sulfide (CdS) and Zinc Sulfide (ZnS) Quantum-Dots Core/Shell Nanocrystals. NANOMATERIALS 2022; 12:nano12132277. [PMID: 35808112 PMCID: PMC9268264 DOI: 10.3390/nano12132277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/17/2022] [Accepted: 06/27/2022] [Indexed: 02/01/2023]
Abstract
Recently, quantum-dot-based core/shell structures have gained significance due to their optical, optoelectronic, and magnetic attributes. Controlling the fluorescence lifetime of QDs shells is imperative for various applications, including light-emitting diodes and single-photon sources. In this work, novel Cu-doped CdS/ZnS shell structures were developed to enhance the photoluminescence properties. The objective was to materialize the Cu-doped CdS/ZnS shells by the adaptation of a two-stage high-temperature doping technique. The developed nanostructures were examined with relevant characterization techniques such as transmission electron microscopy (TEM) and ultraviolet–visible (UV–vis) emission/absorption spectroscopy. Studying fluorescence, we witnessed a sharp emission peak at a wavelength of 440 nm and another emission peak at a wavelength of 620 nm, related to the fabricated Cu-doped CdS/ZnS core/shell QDs. Our experimental results revealed that Cu-doped ZnS shells adopted the crystal structure of CdS due to its larger bandgap. Consequently, this minimized lattice mismatch and offered better passivation to any surface defects, resulting in increased photoluminescence. Our developed core/shells are highly appropriate for the development of efficient light-emitting diodes.
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Sarve DT, Singh SK, Ekhe JD. Ethanol dehydration to diethyl ether over ZSM-5 and β-Zeolite supported Ni W catalyst. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109397] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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14
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Sarve DT, Dutta R, Rastogi A, Ekhe JD. Valorization of industrial waste lignin via pyrolysis in the presence of additives: Formation, characterization, and application of fuel valued bio-oil and activated char. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100398] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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15
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High-temperature sulfurized synthesis of MnxCd1−xS/S-kaolin composites for efficient solar-light driven H2 evolution. Colloids Surf A Physicochem Eng Asp 2022. [DOI: 10.1016/j.colsurfa.2021.127772] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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16
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Sukhadeve G, Shaileshkumar, Janbandhu Y, Kumar R, Gedam RS. Ag‐Doped TiO
2
Nanoparticles as an Effective Photocatalyst for Degradation of Indigo Carmine Dye under Visible Light. ChemistrySelect 2021. [DOI: 10.1002/slct.202103629] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Gaurav Sukhadeve
- Department of Physics Visvesvaraya National Institute of Technology Nagpur 440010 India E-mail: rupesh
| | - Shaileshkumar
- Department of Physics Visvesvaraya National Institute of Technology Nagpur 440010 India E-mail: rupesh
| | - Y. Janbandhu
- Department of Physics Visvesvaraya National Institute of Technology Nagpur 440010 India E-mail: rupesh
| | - Rahul Kumar
- Department of Physics Visvesvaraya National Institute of Technology Nagpur 440010 India E-mail: rupesh
| | - Rupesh S. Gedam
- Department of Physics Visvesvaraya National Institute of Technology Nagpur 440010 India E-mail: rupesh
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