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Ma L, Yang L, Li L, Zhang W, Cheng Y, Wang L, Zhou X, Lv Y, Liu M. Photodegradation of fleroxacin by g-C 3N 4/PPy/Ag and HPLC-MS/MS analysis of degradation pathways. RSC Adv 2023; 13:11912-11918. [PMID: 37077267 PMCID: PMC10107023 DOI: 10.1039/d3ra01485a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 04/05/2023] [Indexed: 04/21/2023] Open
Abstract
To improve the photocatalytic activity of g-C3N4, graphitic phase carbon nitride was prepared using melamine as the substrate and modified with PPy and Ag nanoparticles. The structure, morphology, and optical properties of the photocatalysts were investigated using various characterization methods such as XRD, FT-IR, TEM, XPS, and UV-vis DRS. The degradation of fleroxacin, a common quinolone antibiotic, was isolated and measured using the HPLC-MS/MS technique to trace its intermediates and deduce the main degradation pathways. The results showed that g-C3N4/PPy/Ag had high photocatalytic activity and a degradation rate of more than 90%. The fleroxacin degradation reactions were primarily oxidative ring opening of the N-methyl piperazine ring structure, defluorination reactions on fluoroethyl, HCHO, and N-methyl ethylamine removal reactions.
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Affiliation(s)
- Lei Ma
- College of Pharmacy, Jiamusi University Heilongjiang China +86 18697097060
| | - Lin Yang
- School of Basic Medical Sciences, Jiamusi University Heilongjiang China
| | - Laijun Li
- College of Pharmacy, Jiamusi University Heilongjiang China +86 18697097060
| | - Wu Zhang
- College of Pharmacy, Jiamusi University Heilongjiang China +86 18697097060
| | - Yuqing Cheng
- College of Pharmacy, Jiamusi University Heilongjiang China +86 18697097060
| | - Lei Wang
- College of Pharmacy, Jiamusi University Heilongjiang China +86 18697097060
| | - Xiaoxuan Zhou
- College of Pharmacy, Jiamusi University Heilongjiang China +86 18697097060
| | - Yuguang Lv
- College of Pharmacy, Jiamusi University Heilongjiang China +86 18697097060
| | - Mingyuan Liu
- College of Pharmacy, Jiamusi University Heilongjiang China +86 18697097060
- School of Basic Medical Sciences, Jiamusi University Heilongjiang China
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Gubbi Shivarathri P, Rajappa S, Kalenahally Swamygowda D, Chattanahalli Devendrachari M, Makri Nimbegondi Kotresh H. Green mechanochemical route for the synthesis of carboxy-rich polyaniline/multiwalled carbon nanotubes composite as a competent adsorbent for cationic dyes. SEP SCI TECHNOL 2022. [DOI: 10.1080/01496395.2022.2135541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Poornima Gubbi Shivarathri
- Department of Chemistry, Acharya Institute of Technology, Bangalore, India
- Department of Chemistry, New Horizon College of Engineering, Bangalore, India
| | - Shwetha Rajappa
- Department of Chemistry, Acharya Institute of Technology, Bangalore, India
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Alam MW, Khalid NR, Naeem S, Niaz NA, Ahmad Mir T, Nahvi I, Souayeh B, Zaidi N. Novel Nd-N/TiO 2 Nanoparticles for Photocatalytic and Antioxidant Applications Using Hydrothermal Approach. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15196658. [PMID: 36233999 PMCID: PMC9571569 DOI: 10.3390/ma15196658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Revised: 09/12/2022] [Accepted: 09/20/2022] [Indexed: 06/01/2023]
Abstract
In this study, photocatalysis was employed to degrade a wastewater pollutant (AB-29 dye) under visible light irradiation. For this purpose, nitrogen (N)- and neodymium (Nd)-doped TiO2 nanoparticles were prepared using the simple hydrothermal method. X-ray diffraction (XRD) revealed an anatase phase structure of the Nd-N/TiO2 photocatalyst, whereas properties including the surface morphology, chemical states/electronics structure and optical structure were determined using transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS) and UV-visible (UV-vis.) and photoluminescence (PL) spectroscopies. Photocatalytic testing of the prepared nanomaterials was performed to remove acid blue-29 (AB-29) dye under visible-light exposure. The prepared Nd-N/TiO2 nanoparticles demonstrated a superior photocatalytic activity and the decolorization efficiency was about 92% after visible-light illumination for 1 h and 20 min, while N/TiO2, Nd/TiO2 and TiO2 only showed a 67%, 43% and 31% decolorization efficiency, respectively. The enhanced photocatalytic activity of the Nd-N/TiO2 photocatalyst was due to a decrease in the electron/hole's recombination and the increased absorption of TiO2 in the visible range. The reusability results showed that the average photocatalytic activity decrease for all the samples was only about 16% after five consecutive cycles, indicating a good stability of the prepared nanomaterials. Moreover, the radical scavenging activity of the prepared nanomaterials was evaluated using the DPPH method. The novel Nd-N/TiO2 exhibited a higher antioxidant activity compared to all the other samples.
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Affiliation(s)
- Mir Waqas Alam
- Department of Physics, College of Science, King Faisal University, Al Ahsa 31982, Saudi Arabia
| | - N. R. Khalid
- Department of Physics, Institute of Physics and Material Science, University of Okara, Okara 56300, Pakistan
| | - Sumaira Naeem
- Department of Chemistry, University of Gujrat, H. H. Campus, Gujrat 50700, Pakistan
| | - N. A. Niaz
- Institute of Physics, Bahauddin Zakariya University, Multan 60800, Pakistan
| | - Tanveer Ahmad Mir
- Laboratory of Tissue/Organ Bioengineering and BioMEMS, Organ Transplant Centre of Excellence, Transplantation Research & Innovation (Dpt)-R, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Saudi Arabia
| | - Insha Nahvi
- Department of Basic Sciences, Preparatory Year Deanship, King Faisal University, Al Ahsa 31982, Saudi Arabia
| | - Basma Souayeh
- Department of Physics, College of Science, King Faisal University, Al Ahsa 31982, Saudi Arabia
| | - Noushi Zaidi
- Department of Basic Sciences, Preparatory Year Deanship, King Faisal University, Al Ahsa 31982, Saudi Arabia
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Talati A, Haghighi M. Hard-templating design of mesoporous ZnAl2O4 via in-situ microwave combustion method as an efficient solar-light-responsive nanophotocatalyst for photo-decomposition of organic dyes from aqueous solution. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.113955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Ojha PC, Satpathy SS, Ojha AK, Sukla LB, Pradhan D. Overcoming challenges due to enhanced biomedical waste generation during COVID-19 pandemic. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 832:155072. [PMID: 35398414 PMCID: PMC8988481 DOI: 10.1016/j.scitotenv.2022.155072] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 04/02/2022] [Accepted: 04/02/2022] [Indexed: 05/09/2023]
Abstract
Biomedical wastes (BMWs) are potentially infectious to the environment and health. They are co-dependent and accumulative during the ongoing coronavirus disease-2019(COVID-19) pandemic. In India the standard treatment processes of BMWs are incineration, autoclaving, shredding, and deep burial; however, incineration and autoclaving are the leading techniques applied by many treatment providers. These conventional treatment methods have several drawbacks in terms of energy, cost, and emission. But the actual problem for the treatment providers is the huge and non-uniform flow of the BMWs during the pandemic. The existing treatment methods are lacking flexibility for the non-uniform flow. The Government of India has provisionally approved some new techniques like plasma pyrolysis, sharp/needle blaster, and PIWS-3000 technologies on a trial basis. But they are all found to be inadequate in the pandemic. Therefore, there is an absolute requirement to micromanage the BMWs based on certain parameters for the possible COVID-19 like pandemic in the future. Segregation is a major step of the BMW management. Its guideline may be shuffled as segregation at the entry points followed by collection instead of the existing system of the collection followed by segregation. Other steps like transportation, location of treatment facilities, upgradation of the existing treatment facilities, and new technologies can solve the challenges up to a certain extent. Technologies like microwave treatment, alkaline hydrolysis, steam sterilization, biological treatment, catalytic solar disinfection, and nanotechnology have a lot of scopes for the treatment of BMWs. Hi-tech approaches in handling and transportation are found to be fruitful in the initial steps of BMW management. End products of the treated BMWs can be potentially fabricated for the application in the built environment. Some policies need to be re-evaluated by the health care facilities or government administrations for efficient BMW management.
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Affiliation(s)
- Priti Chhanda Ojha
- Biofuels and Bioprocessing Research Center, ITER, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar 751030, India; Vasudev Higher Secondary School, Talcher, Angul 759100, India
| | - Swati Sucharita Satpathy
- Biofuels and Bioprocessing Research Center, ITER, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar 751030, India
| | | | - Lala Behari Sukla
- Biofuels and Bioprocessing Research Center, ITER, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar 751030, India
| | - Debabrata Pradhan
- Biofuels and Bioprocessing Research Center, ITER, Siksha 'O' Anusandhan (Deemed to be University), Bhubaneswar 751030, India.
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Padervand M, Nasiri F, Hajiahmadi S, Bargahi A, Esmaeili S, Amini M, Karimi Nami R, Shahsavari Z, Karima S. Ag@Ag2MoO4 decorated polyoxomolybdate/C3N4 nanostructures as highly efficient photocatalysts for the wastewater treatment and cancer cells killing under visible light. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109500] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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