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Tang K, Su H, Qu Z. Preparation of honokiol-loaded titanium dioxide nanotube drug delivery system and its effect on CAL-27 cells. Front Bioeng Biotechnol 2023; 11:1249349. [PMID: 37600298 PMCID: PMC10435746 DOI: 10.3389/fbioe.2023.1249349] [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: 06/28/2023] [Accepted: 07/26/2023] [Indexed: 08/22/2023] Open
Abstract
Background: Tongue cancer is the most common type of oral cancer, and patients have a poor prognosis and quality of life after conventional surgical treatment. Honokiol (HNK) is a kind of lignan extracted from Chinese herbal medicine Houpu, many domestic and international experiments have demonstrated its anti-tumor effect. Titanium dioxide nanotube (TNTs) is a kind of nanomaterial which can be used as drug carrier. The purpose of this study is to explore the effects of HNK-loaded TNTs delivery system (HNK-TNTs) on anti-tumor. Methods: TNTs were prepared by anodic oxidation method, and HNK was loaded onto TNTs by physical adsorption. The effect of HNK-TNTs on the proliferation, migration and apoptosis of CAL-27 cells were explored by CCK-8 experiment, scratch assay, live and dead staining and cellular immunofluorescence analysis. Results: The material characterization test results showed that we had successfully prepared HNK-TNTs. CCK-8 experiment, scratch assay showed that the proliferation and migration ability of CAL-27 cells were significantly weakened after treatment with HNK-TNTs, and their cell proliferation rates significantly decreased. Live/dead staining, cell immunofluorescence analysis showed that HNK-TNTs could promote CAL-27 cells apoptosis by increasing the expression levels of the apoptosis-related protein Bax and Fas. Conclusion: In this experiment, we had successfully prepared Honokiol-loaded titanium dioxide nanotube drug delivery system (HNK-TNTs) and compared the effects of single drug HNK and HNK-TNTs on the proliferation, apoptosis and migration of tongue cancer CAL-27 cells. This experiment showed that HNK-TNTs had greater anti-proliferative, apoptosis-promoting and migration-inhibiting effects than the HNK as a single drug.
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Affiliation(s)
| | | | - Zhi Qu
- Second Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
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2
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Petcu G, Papa F, Atkinson I, Baran A, Apostol NG, Petrescu S, Richaudeau L, Blin JL, Parvulescu V. Co- and Ni-Doped TiO 2 Nanoparticles Supported on Zeolite Y with Photocatalytic Properties. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:2200. [PMID: 37570517 PMCID: PMC10420643 DOI: 10.3390/nano13152200] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 07/19/2023] [Accepted: 07/26/2023] [Indexed: 08/13/2023]
Abstract
Zeolite Y samples with microporous and hierarchical structures containing Ti-Ni and Ti-Co oxides were obtained as active photocatalysts. Different Ti amounts (5, 10% TiO2) were supported, followed by the loading of Ni or Co oxides (5%). X-ray diffraction evidenced the presence of TiO2 as an anatase. N2 adsorption-desorption results showed type IV isotherms for hierarchical zeolite Y samples, and a combination of type IV and I isotherms for zeolite Y samples. UV-Vis diffuse reflectance spectra showed a shift in the absorption band to visible with increasing Ti loading and especially after Co and Ni addition. A significant effect of the support was evidenced for Ti and its interaction with Co/Ni species. The zeolite Y support stabilized Ti in the 4+ oxidation state while hierarchical zeolite Y support favored the formation of Ti3+ species, Ni0 and Ni2+ and the oxidation of Co to 3+ oxidation state. Photocatalytic activity, under UV and visible light irradiation, was evaluated by the degradation of amoxicillin, used as a model test. The photocatalytic mechanism was investigated using ethanol, p-benzoquinone and KI as ·OH and ·O2- radicals and hole (h+) scavengers. The best results were obtained for the immobilized Ni-Ti species on the hierarchical zeolite Y support.
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Affiliation(s)
- Gabriela Petcu
- Institute of Physical Chemistry “Ilie Murgulescu”, Romanian Academy, 060021 Bucharest, Romania; (G.P.); (F.P.); (I.A.); (A.B.); (S.P.); (V.P.)
| | - Florica Papa
- Institute of Physical Chemistry “Ilie Murgulescu”, Romanian Academy, 060021 Bucharest, Romania; (G.P.); (F.P.); (I.A.); (A.B.); (S.P.); (V.P.)
| | - Irina Atkinson
- Institute of Physical Chemistry “Ilie Murgulescu”, Romanian Academy, 060021 Bucharest, Romania; (G.P.); (F.P.); (I.A.); (A.B.); (S.P.); (V.P.)
| | - Adriana Baran
- Institute of Physical Chemistry “Ilie Murgulescu”, Romanian Academy, 060021 Bucharest, Romania; (G.P.); (F.P.); (I.A.); (A.B.); (S.P.); (V.P.)
| | - Nicoleta G. Apostol
- National Institute of Materials Physics, Atomiștilor 405A, 077125 Magurele, Romania;
| | - Simona Petrescu
- Institute of Physical Chemistry “Ilie Murgulescu”, Romanian Academy, 060021 Bucharest, Romania; (G.P.); (F.P.); (I.A.); (A.B.); (S.P.); (V.P.)
| | - Lionel Richaudeau
- Faculty of Sciences and Technology, University of Lorraine, CNRS, L2CM, F-54000 Nancy, France;
| | - Jean-Luc Blin
- Faculty of Sciences and Technology, University of Lorraine, CNRS, L2CM, F-54000 Nancy, France;
| | - Viorica Parvulescu
- Institute of Physical Chemistry “Ilie Murgulescu”, Romanian Academy, 060021 Bucharest, Romania; (G.P.); (F.P.); (I.A.); (A.B.); (S.P.); (V.P.)
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3
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Predoană L, Petcu G, Preda S, Pandele-Cușu J, Petrescu SV, Băran A, Apostol NG, Costescu RM, Surdu VA, Vasile BŞ, Ianculescu AC. Copper-/Zinc-Doped TiO 2 Nanopowders Synthesized by Microwave-Assisted Sol-Gel Method. Gels 2023; 9:gels9040267. [PMID: 37102879 PMCID: PMC10137937 DOI: 10.3390/gels9040267] [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: 02/10/2023] [Revised: 03/17/2023] [Accepted: 03/22/2023] [Indexed: 04/28/2023] Open
Abstract
Using the microwave-assisted sol-gel method, Zn- and Cu-doped TiO2 nanoparticles with an anatase crystalline structure were prepared. Titanium (IV) butoxide was used as a TiO2 precursor, with parental alcohol as a solvent and ammonia water as a catalyst. Based on the TG/DTA results, the powders were thermally treated at 500 °C. XRD and XRF revealed the presence of a single-phase anatase and dopants in the thermally treated nanoparticles. The surface of the nanoparticles and the oxidation states of the elements were studied using XPS, which confirmed the presence of Ti, O, Zn, and Cu. The photocatalytic activity of the doped TiO2 nanopowders was tested for the degradation of methyl-orange (MO) dye. The results indicate that Cu doping increases the photoactivity of TiO2 in the visible-light range by narrowing the band-gap energy.
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Affiliation(s)
- Luminița Predoană
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania
| | - Gabriela Petcu
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania
| | - Silviu Preda
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania
| | - Jeanina Pandele-Cușu
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania
| | - Simona Viorica Petrescu
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania
| | - Adriana Băran
- Institute of Physical Chemistry "Ilie Murgulescu" of the Romanian Academy, 202 Splaiul Independenței, 060021 Bucharest, Romania
| | - Nicoleta G Apostol
- National Institute of Materials Physics, Atomiștilor 405A, 077125 Măgurele, Romania
| | - Ruxandra M Costescu
- National Institute of Materials Physics, Atomiștilor 405A, 077125 Măgurele, Romania
| | - Vasile-Adrian Surdu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, "Politehnica" University of Bucharest, 1-7 Gh. Polizu, 011061 Bucharest, Romania
| | - Bogdan Ştefan Vasile
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, "Politehnica" University of Bucharest, 1-7 Gh. Polizu, 011061 Bucharest, Romania
| | - Adelina C Ianculescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, Faculty of Chemical Engineering and Biotechnologies, "Politehnica" University of Bucharest, 1-7 Gh. Polizu, 011061 Bucharest, Romania
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4
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Shahida S, Khan MI, Zafar S, Shah KH, Farooq U, Hafeez M, Elboughdiri N, Shanableh A, Abdelfattah A. XAD-4 resin impregnated with oxytetracycline for the online preconcentration of zirconium (IV) from environmental and geological samples. INORG NANO-MET CHEM 2023. [DOI: 10.1080/24701556.2023.2165678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Shabnam Shahida
- Department of Chemistry, University of Poonch Rawalakot, Azad Kashmir, Pakistan
| | - Muhammad Imran Khan
- Research Institute of Sciences and Engineering, University of Sharjah, Sharjah, United Arab Emirates
| | - Shagufta Zafar
- Department of Chemistry, The Government Sadiq College Women University, Bahawalpur, Pakistan
| | - Khizar Hussain Shah
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Islamabad, Pakistan
| | - Umar Farooq
- Institute of Chemistry, University of the Punjab, Lahore, Pakistan
| | - Muhammad Hafeez
- Department of Chemistry, University of Azad Jammu and Kashmir Muzaffarabad, Azad Kashmir, Pakistan
| | - Noureddine Elboughdiri
- Chemical Engineering Department, College of Engineering, University of Ha’il, Ha’il, Saudi Arabia
- Department of Chemical Engineering Process, National School of Engineers Gabes, University of Gabes, Gabes, Tunisia
| | - Abdallah Shanableh
- Research Institute of Sciences and Engineering, University of Sharjah, Sharjah, United Arab Emirates
| | - Amari Abdelfattah
- Department of Chemical Engineering Process, National School of Engineers Gabes, University of Gabes, Gabes, Tunisia
- Department of Chemical Engineering, College of Engineering, King Khalid University, Abha, Saudi Arabia
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5
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Zhang Y, Chen Q, Qin H, Huang J, Yu Y. Identification of Reactive Oxygen Species and Mechanism on Visible Light-Induced Photosensitized Degradation of Oxytetracycline. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:15550. [PMID: 36497621 PMCID: PMC9738741 DOI: 10.3390/ijerph192315550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 11/20/2022] [Accepted: 11/22/2022] [Indexed: 06/17/2023]
Abstract
This study investigated the photolysis and TiO2-assisted photosensitized degradation of oxytetracycline (OTC) under visible light, the active reactive oxygen species (ROS), and the degradation mechanisms in these two reactions. The results show that the deprotonated OTC could be photolyzed more easily under visible light because of the redshift of its absorption spectrum at high pH values. Due to the TiO2-assisted self-photosensitized degradation of OTC, OTC removal in the visible light/TiO2 system was more efficient with the addition of TiO2, as demonstrated when TiO2 was replaced with insulator SiO2. The study's ROS scavenging experiments show that superoxide radical anion (O2•-) ROS was most responsible for the self-sensitized degradation of OTC in both reactions. OTC degradation under the visible light/TiO2 system was enhanced with increasing TiO2 load, while the elimination of total organic carbon (TOC) was very limited after 5 h of visible light irradiation. Based on the eight identified transformation products found, five potential reaction mechanisms, including hydroxylation, quinonization, decarbonylation, de-methylation, and dehydration, were proposed for the photolytic and TiO2-assisted photosensitized degradation mechanisms of OTC under visible light. This study indicates that OTC can degrade under visible light with or without a semiconductor when conditions are suitable.
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Affiliation(s)
- Yibo Zhang
- School of Emergency Management, Xihua University, Chengdu 610039, China
| | - Qian Chen
- School of Emergency Management, Xihua University, Chengdu 610039, China
| | - Hao Qin
- School of Emergency Management, Xihua University, Chengdu 610039, China
| | - Junhan Huang
- Sichuan Environment and Engineering Appraisal Center, Department of Ecology and Environment of Sichuan Province, Chengdu 610000, China
| | - Yue Yu
- School of Emergency Management, Xihua University, Chengdu 610039, China
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6
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Sobhy S, Elsenety MM, Mohamed MBI, Moustafa Y, Salama TM. Molecular dynamic simulations for interactions of oxytetracycline with copper(II)-exchanged NaY zeolite. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109829] [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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7
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Hu W, Yie KHR, Liu C, Zhu J, Huang Z, Zhu B, Zheng D, Yang B, Huang B, Yao L, Liu J, Shen X, Deng Z. Improving the valence self-reversible conversion of cerium nanoparticles on titanium implants by lanthanum doping to enhance ROS elimination and osteogenesis. Dent Mater 2022; 38:1362-1375. [PMID: 35752471 DOI: 10.1016/j.dental.2022.06.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2021] [Revised: 05/04/2022] [Accepted: 06/05/2022] [Indexed: 11/29/2022]
Abstract
Equipped with anti-oxidative properties, cerium oxide nanoparticles (CNPs) are gradually being adopted over the years in the field of oxidative stress research. However, the effects of CNPs may be diminished when under the influence of prolonged and substantially elevated levels of oxidative stress. Therefore, it is imperative to enhance the efficacy of CNPs to resist oxidative stress. In this study, our approach involves the fabrication of titanium surface CNPs coatings doped with different concentrations of lanthanum ions (La3+) and the investigation of their local anti-oxidative stress potential. The physicochemical characterization showed that the La-CNPs groups had a substantial increase in the generation of oxygen vacancies within the CNPs structure with the increase of La doping concentration. In vitro findings proofed that the cytocompatibility of different La-CNPs coatings showed a trend of increasing first and then decreasing with the increase of La doping concentration under oxidative stress microenvironment. Among these groups, the 30 % La-CNPs group presented the best cell proliferation and osteogenic differentiation which could activate the FoxO1 pathway, then upregulated the expression of SOD1 and CAT, and finally resulted in the inhibition of ROS production. In vivo results further confirmed that the 30 % La-CNPs group showed significant osteogenic effects in two rat models (osteoporosis and diabetes models). In conclusion, we believe that the 30 % La-CNPs coating holds promising potential for its implant applications in patients with oxidative stress-related diseases.
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Affiliation(s)
- Wenjia Hu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325000, China
| | - Kendrick Hii Ru Yie
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325000, China
| | - Chongxing Liu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325000, China
| | - Jinlei Zhu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325000, China
| | - Zhuo Huang
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325000, China
| | - Bingbing Zhu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325000, China
| | - Dongyang Zheng
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325000, China
| | - Bingqian Yang
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325000, China
| | - Benheng Huang
- School and Hospital of Stomatology, Lanzhou University, Lanzhou 730000, China
| | - Lili Yao
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325000, China
| | - Jinsong Liu
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325000, China.
| | - Xinkun Shen
- Science and Education Division, The Third Affiliated Hospital of Wenzhou Medical University (Ruian People's Hospital), Wenzhou 325016, China.
| | - Zhennan Deng
- School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325000, China.
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8
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Cheng CW, Lee SY, Chen TY, Yang MJ, Yuann JMP, Chiu CM, Huang ST, Liang JY. A study of the effect of reactive oxygen species induced by violet and blue light from oxytetracycline on the deactivation of Escherichia coli. Photodiagnosis Photodyn Ther 2022; 39:102917. [PMID: 35597444 DOI: 10.1016/j.pdpdt.2022.102917] [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: 04/02/2022] [Revised: 05/07/2022] [Accepted: 05/17/2022] [Indexed: 10/18/2022]
Abstract
Oxytetracycline (OTC), a tetracycline antibiotic, is a broad-spectrum antibacterial agent. In this investigation, liquid chromatography-mass spectrometry (LC-MS) is utilized to determine the effects of blue light (λ = 448 nm) illumination (BLIA) and violet light (λ = 403 nm) illumination (VLIA) on conformational changes in OTC at pH 7.8. The photochemical effect of OTC that is exposed to BLIA and VLIA on the deactivation of Escherichia coli (E. coli) is studied. The deactivation of E. coli has an insignificant effect on treatment with OTC alone. OTC is relatively unstable under BLIA and VLIA illumination in an alkaline solution, and OTC has been shown to inactivate E. coli by generating reactive oxygen species (ROS). Less anionic superoxide radicals (O2•-) are generated from OTC that is treated with BLIA than that from VLIA treatment, so OTC is more efficient in inactivating E. coli under VLIA. Inactivation of reduction rates of 0.51 and 3.65 logs in E. coli are achieved using 0.1 mM OTC under BLIA for 120 min and VLIA for 30 min, respectively, under the same illumination intensity (20 W/m2). Two photolytic products of OTC (PPOs) are produced when OTC is exposed to BLIA and VLIA, with molecular ions at m/z 447 and 431, molecular formulae C21H22N2O9 and C21H22N2O8, and masses of 446.44 and 430.44 g/mol, respectively. The results show that when exposed to VLIA, OTC exhibits enhanced inactivation of E. coli, suggesting that the photochemical treatment of OTC is a potential supplement in a hygienic process.
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Affiliation(s)
- Chien-Wei Cheng
- Department of Biotechnology, Ming Chuan University, Gui-Shan 33343, Taiwan.
| | - Shwu-Yuan Lee
- Department of Tourism and Leisure, Hsing Wu University, New Taipei City 24452, Taiwan.
| | - Tang-Yu Chen
- Department of Biotechnology, Ming Chuan University, Gui-Shan 33343, Taiwan.
| | - Meei-Ju Yang
- Tea Research and Extension Station, Yangmei 326011, Taiwan.
| | - Jeu-Ming P Yuann
- Department of Biotechnology, Ming Chuan University, Gui-Shan 33343, Taiwan
| | - Chi-Ming Chiu
- Department of Biotechnology, Ming Chuan University, Gui-Shan 33343, Taiwan.
| | - Shiuh-Tsuen Huang
- Department of Science Education and Application, National Taichung University of Education, Taichung 40306, Taiwan; Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung 40200, Taiwan.
| | - Ji-Yuan Liang
- Department of Biotechnology, Ming Chuan University, Gui-Shan 33343, Taiwan.
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Mdlovu NV, Yang NC, Lin KS, Chang CJ, Dinh KT, Lin YG. Formulation and characterization of W-doped titania nanotubes for adsorption/photodegradation of methylene blue and basic violet 3 dyes. Catal Today 2022. [DOI: 10.1016/j.cattod.2021.03.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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10
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Rajan MS, John A, Thomas J. Nanophotocatalysis for the Removal of Pharmaceutical Residues from
Water Bodies: State of Art and Recent Trends. CURR ANAL CHEM 2022. [DOI: 10.2174/1573411017666210412095354] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
Background:
The occurrence of pharmaceuticals in surface and drinking water is ubiquitous
and is a major concern of researchers. These compounds cause a destructive impact on
aquatic and terrestrial life forms, and the removal of these compounds from the environment is a
challenging issue. Existent conventional wastewater treatment processes are generally inefficacious
because of their low degradation efficiency and inadequate techniques associated with the disposal
of adsorbed pollutants during comparatively effective methods like the adsorption process.
Remediation Method:
Semiconductor-mediated photocatalysis is an attractive technology for the
efficient removal of pharmaceutical compounds. Among various semiconductors, TiO2 and ZnObased
photocatalysts gained much interest during the last years because of their efficiency in decomposing
and mineralizing the lethal organic pollutants with the utilization of UV-visible light.
Incessant efforts are being undertaken for tuning the physicochemical, optical, and electronic properties
of these photocatalysts to strengthen their overall photocatalytic performance with good recycling
efficiency.
Results:
This review attempts to showcase the recent progress in the rational design and fabrication
of nanosized TiO2 and ZnO photocatalysts for the removal of pollutants derived from the pharmaceutical
industry and hospital wastes.
Conclusion:
Photocatalysis involving TiO2 and ZnO provides a positive impact on pollution management
and could be successfully applied to remove pharmaceuticals from wastewater streams.
Structure modifications, the introduction of heteroatoms, and the integration of polymers with
these nano photocatalysts offer leapfrogging opportunities for broader applications in the field of
photocatalysis.
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Affiliation(s)
- Mekha Susan Rajan
- Research Department of Chemistry, Kuriakose Elias College, Mannanam, Kottayam, Kerala 686561,India
| | - Anju John
- Research Department of Chemistry, Kuriakose Elias College, Mannanam, Kottayam, Kerala 686561,India
| | - Jesty Thomas
- Research Department of Chemistry, Kuriakose Elias College, Mannanam, Kottayam, Kerala 686561,India
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Jia L, Jin Y, Li J, Wei Z, Chen M, Ma J. Study on High-Efficiency Photocatalytic Degradation of Oxytetracycline Based on a Spiral Microchannel Reactor. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.1c03495] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Affiliation(s)
- Lianyu Jia
- Engineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Yang Jin
- Engineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Jun Li
- Engineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Zhizhen Wei
- Engineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Ming Chen
- Engineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Jun Ma
- Engineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources, School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
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Facile Synthesis of Potassium-Doped Titanium Oxide Nanostructure (KTiOxs)/AlO(OH) Composites for Enhanced Photocatalytic Performance. Catalysts 2021. [DOI: 10.3390/catal11050548] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Generally, nanoparticles (NPs) are used as photocatalysts, which sometimes results in difficulties in the separation and recycling of photocatalysts from suspensions after their application in water and wastewater treatment, which hinders industrial applications of NPs that are too fine to be removed by gravitational settling. This can be solved by using support NPs to overcome these problems. -OH enrich AlO(OH), which is produced by a steam coating process, has been could be used as a possible support, because the -OH groups on the surface can interact with foreign molecules; thus, various composite functional materials can be prepared. Potassium doped titanium oxide NPs, which are produced by a wet corrosion process, namely KTiOxs, have been selected as photocatalysts, because KTiOxs have sufficient K+ ions, thereby expecting the chemical bonding with -OH group from AlO(OH). This study fabricated a novel photocataysis system made by combining KTiOxs as catalysts and AlO(OH) as the catalysts’ support, namely KTiOxs/AlO(OH) composites. The KTiOxs nanowires, obtained from 10 mol/L of a KOH solution treated with Ti and AlO(OH) at 280 °C for 24 h through a steam coating process, yielded the highest surface area and the highest photocatalytic performance.
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13
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Degradation of Oxytetracycline in Aqueous Solutions: Application of Homogeneous and Heterogeneous Advanced Oxidative Processes. SUSTAINABILITY 2020. [DOI: 10.3390/su12218807] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Oxytetracycline is one of the antibiotics most frequently used in the Shrimp Industry during the control of bacterial diseases. These emerging pollutants, which appear in low concentrations, are persistent and alternative treatments and are required for their elimination. The degradation of oxytetracycline was evaluated in an aqueous solution by applying homogeneous (UV/H2O2 and photo-Fenton) and heterogeneous (UV/TiO2/H2O2) advanced oxidative processes (AOPs). The studies were carried out using a bench reactor with short-wave ultraviolet lamps (UV-C). We quantified the extent to which the degradation of the drug had been efficient by employing highly efficient liquid chromatography (HPLC) and a PDA detector with a wavelength of 354 nm and a C18 column. The best results were obtained when applying the UV/H2O2 treatment, which attained a degradation of 97% under the initial conditions of a dose of 8 µL of H2O2 and 120 min of radiation. The pseudo-first order kinetic model proposed by Chan and Chu showed that the experimental results had an adequate fit, with values greater than R2 ≥ 0.95. Toxicity tests were applied to verify the effect of AOPs employed, when the drug was present in low concentrations. The test results demonstrated a decrease in the root growth of the species Lactuca sativa and Daucus carota.
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