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Li Z, Bai L, Xing Z, Yang W, Wu Q, Zhang G. Thermosensitive polymers-TiO2 hollow spheres composite for photocatalysis. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.110096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Kumar S, Sharma R, Gupta A, Dubey KK, Khan AM, Singhal R, Kumar R, Bharti A, Singh P, Kant R, Kumar V. TiO 2 based Photocatalysis membranes: An efficient strategy for pharmaceutical mineralization. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 845:157221. [PMID: 35809739 DOI: 10.1016/j.scitotenv.2022.157221] [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: 04/11/2022] [Revised: 06/15/2022] [Accepted: 07/04/2022] [Indexed: 06/15/2023]
Abstract
Among the various emerging contaminants, pharmaceuticals (PhACs) seem to have adverse effects on the quality of water. Even the smallest concentration of PhACs in ground water and drinking water is harmful to humans and aquatic species. Among all the deaths reported due to COVID-19, the mortality rate was higher for those patients who consumed antibiotics. Consequently, PhAC in water is a serious concern and their removal needs immediate attention. This study has focused on the PhACs' degradation by collaborating photocatalysis with membrane filtration. TiO2-based photocatalytic membrane is an innovative strategy which demonstrates mineralization of PhACs as a safer option. To highlight the same, an emphasis on the preparation and reinforcing properties of TiO2-based nanomembranes has been elaborated in this review. Further, mineralization of antibiotics or cytostatic compounds and their degradation mechanisms is also highlighted using TiO2 assisted membrane photocatalysis. Experimental reactor configurations have been discussed for commercial implementation of photoreactors for PhAC degradation anchored photocatalytic nanomembranes. Challenges and future perspectives are emphasized in order to design a nanomembrane based prototype in future for wastewater management.
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Affiliation(s)
- Sanjeev Kumar
- Department of Chemistry, University of Delhi, Delhi, India; Department of Chemistry, Kirori Mal College, University of Delhi, India
| | - Ritika Sharma
- Department of Biochemistry, University of Delhi, Delhi, India
| | - Akanksha Gupta
- Department of Chemistry, Sri Venkateswara College, University of Delhi, India.
| | | | - A M Khan
- Department of Chemistry, Motilal Nehru College, India
| | - Rahul Singhal
- Department of Chemistry, Shivaji College, Delhi, India
| | - Ravinder Kumar
- Department of Chemistry, Gurukula Kangri (Deemed to be University), Haridwar, Uttarakhand, India
| | - Akhilesh Bharti
- Department of Chemistry, Kirori Mal College, University of Delhi, India
| | - Prashant Singh
- Department of Chemistry, Atma Ram Sanatan Dharma College, Delhi, India
| | - Ravi Kant
- Department of Chemistry, Zakir Hussain Delhi College, Delhi, India
| | - Vinod Kumar
- Special Centre for Nano Sciences, Jawaharlal Nehru University, Delhi, India.
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Wang L, Xu H, Lu J, Chovelon JM, Ji Y. Aquatic photolysis of the pharmaceutical ambroxol: The role of 2,4-dibromoaniline chromophore and heavy atom effect of bromine. WATER RESEARCH 2022; 226:119275. [PMID: 36288664 DOI: 10.1016/j.watres.2022.119275] [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: 06/15/2022] [Revised: 10/09/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
As one of the most effective expectorant class drugs, ambroxol (AMB) has been frequently used to treat acute and chronic bronchitis. Extensive use and human excretion result in the widespread occurrence of AMB in wastewater. Herein, we reported the photolysis of AMB in aqueous solution upon 254 nm ultraviolet radiation (UV254). Spectroscopic characterization showed that 2,4-dibromoaniline (DBA) moiety is the core chromophore of AMB. Quantum yield of DBA changed little at pH 4.0 - 9.0; however, AMB showed higher quantum yield at pH > 8.0. Both DBA and AMB have high photoreactivity, which can be attributed to the "heavy atom" effect of bromine substituents. The photolysis of AMB occurred through photoreduction, photoionization, photonucleophilic substitution, side-chain cleavage, and coupling reactions. Both AMB and DBA underwent debromination with yields reaching 80% under 3200 mJ cm-2 UV fluence. Photo-debromination occurred preferentially at the para-position. The presence of natural organic matter inhibited the photodegradation, mainly due to the light-screening effect. The photolysis of AMB was slightly enhanced in the presence of NO3- likely due to radical-induced oxidation. Bioluminescence inhibition assay revealed that photoproducts were not toxic. The results show that UV254 radiation with fluences relevant to advanced oxidation processes was effective for the abatement of AMB in wastewater. However, UV254 treatment of wastewater containing higher concentrations (˃ μg L-1) of AMB should be done with caution because the released Br- can be converted to toxic brominated disinfection byproducts and bromate in subsequent oxidation process.
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Affiliation(s)
- Lixiao Wang
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Haiyan Xu
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Junhe Lu
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jean-Marc Chovelon
- University of Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne F-69626, France
| | - Yuefei Ji
- College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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Nanomaterials for Photocatalytic Degradations of Analgesic, Mucolytic and Anti-Biotic/Viral/Inflammatory Drugs Widely Used in Controlling SARS-CoV-2. Catalysts 2022. [DOI: 10.3390/catal12060667] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The COVID-19 pandemic has been transformed into one of the main worldwide challenges, in recent years. For controlling symptoms that are caused by this disease (e.g., chills or fever, shortness of breath and/or difficulty in breathing, cough, sore throat, fatigue, headache, muscle aches, the new loss of tastes and/or smells, congestion or runny nose, nausea, vomiting and/or diarrhea), lots of medicines including analgesics, mucolytics, and anti-biotic/viral/inflammatory drugs have been frequently prescribed. As these medicines finally contaminate terrestrial and aquatic habitats by entering surface waterways through pharmaceutical production and excreting trace amounts of waste after human usage, they have negative impacts on wildlife’s health and ecosystem. Residual drugs in water have the potential to harm aquatic creatures and disrupt their food chain as well as the breeding cycle. Therefore, proper degradation of these broadly used medicines is highly crucial. In this work, the use of nanomaterials applicable in photocatalytic degradations of analgesics (e.g., acetaminophen, aspirin, ibuprofen, and naproxen), mucolytics (e.g., ambroxol), antibiotics (e.g., azithromycin and quinolones including hydroxychloroquine and chloroquine phosphate), anti-inflammatory glucocorticoids (e.g., dexamethasone and cortisone acetate), antihistamines (e.g., diphenhydramine), H2 blockers (e.g., famotidine), anthelmintics (e.g., praziquantel), and finally antivirals (e.g., ivermectin, acyclovir, lopinavir/ritonavir, favipiravir, nitazoxanide, and remdesivir) which widely used in controlling/treating the coronavirus have been reviewed and discussed.
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Bhosale MG, Sutar RS, Londhe SS, Patil MK. Sol–gel method synthesized Ce‐doped TiO
2
visible light photocatalyst for degradation of organic pollutants. Appl Organomet Chem 2022. [DOI: 10.1002/aoc.6586] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Mangesh G. Bhosale
- Department of Chemistry Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, Sub‐Campus Osmanabad India
- Department of Chemistry Ramkrishna Paramhansa Mahavidyalaya Osmanabad India
| | - Radhakrishna S. Sutar
- Department of Chemistry Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, Sub‐Campus Osmanabad India
| | | | - Meghshyam K. Patil
- Department of Chemistry Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, Sub‐Campus Osmanabad India
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Synthesis and Characterization of Manganese-Modified Black TiO 2 Nanoparticles and Their Performance Evaluation for the Photodegradation of Phenolic Compounds from Wastewater. MATERIALS 2021; 14:ma14237422. [PMID: 34885576 PMCID: PMC8658776 DOI: 10.3390/ma14237422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 11/25/2021] [Accepted: 11/30/2021] [Indexed: 11/17/2022]
Abstract
The release of phenolic-contaminated treated palm oil mill effluent (TPOME) poses a severe threat to human and environmental health. In this work, manganese-modified black TiO2 (Mn-B-TiO2) was produced for the photodegradation of high concentrations of total phenolic compounds from TPOME. A modified glycerol-assisted technique was used to synthesize visible-light-sensitive black TiO2 nanoparticles (NPs), which were then calcined at 300 °C for 60 min for conversion to anatase crystalline phase. The black TiO2 was further modified with manganese by utilizing a wet impregnation technique. Visible light absorption, charge carrier separation, and electron–hole pair recombination suppression were all improved when the band structure of TiO2 was tuned by producing Ti3+ defect states. As a result of the enhanced optical and electrical characteristics of black TiO2 NPs, phenolic compounds were removed from TPOME at a rate of 48.17%, which is 2.6 times higher than P25 (18%). When Mn was added to black TiO2 NPs, the Ti ion in the TiO2 lattice was replaced by Mn, causing a large redshift of the optical absorption edges and enhanced photodegradation of phenolic compounds from TPOME. The photodegradation efficiency of phenolic compounds by Mn-B-TiO2 improved to 60.12% from 48.17% at 0.3 wt% Mn doping concentration. The removal efficiency of phenolic compounds from TPOME diminished when Mn doping exceeded the optimum threshold (0.3 wt%). According to the findings, Mn-modified black TiO2 NPs are the most effective, as they combine the advantages of both black TiO2 and Mn doping.
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Pak S, Ri K, Xu C, Ji Q, Sun D, Qi C, Yang S, He H, Pak M. Fabrication of g-C 3N 4/Y-TiO 2 Z-scheme heterojunction photocatalysts for enhanced photocatalytic activity. NEW J CHEM 2021. [DOI: 10.1039/d1nj03691b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The g-C3N4/Y-TiO2 Z-scheme heterojunction photocatalysts for enhanced photocatalytic activity that use yttrium instead of noble metals was successfully manufactured.
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Affiliation(s)
- SongSik Pak
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, P. R. China
- Department of Applied Chemical Engineering, Hamhung University of Chemical Industry, Hamhung, Democratic People's Republic of Korea
| | - KwangChol Ri
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, P. R. China
- Institute of Chemical Engineering, Hamhung University of Chemical Industry, Hamhung, Democratic People's Republic of Korea
| | - Chenmin Xu
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, P. R. China
| | - Qiuyi Ji
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, P. R. China
| | - Dunyu Sun
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, P. R. China
| | - Chengdu Qi
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, P. R. China
| | - Shaogui Yang
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, P. R. China
| | - Huan He
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, P. R. China
| | - MyongNam Pak
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, P. R. China
- Department of Physics, Kim Il Sung University, Pyongyang, Democratic People's Republic of Korea
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