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Herold D, Brauser M, Kind J, Thiele CM. Evolution of a Combined UV/Vis and NMR Setup with Fixed Pathlengths for Mass-limited Samples. Chemistry 2024; 30:e202304016. [PMID: 38360972 DOI: 10.1002/chem.202304016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 02/14/2024] [Accepted: 02/15/2024] [Indexed: 02/17/2024]
Abstract
The investigation of reaction mechanisms is a complex task that usually requires the use of several techniques. To obtain as much information as possible on the reaction and any intermediates - possibly invisible to one technique - the combination of techniques is a solution. In this work we present a new setup for combined UV/Vis and NMR spectroscopy and compare it to an established alternative. The presented approach allows a versatile usage of different commercially-available components like mirrors and fiber bundles as well as different fixed pathlengths according to double transmission or single transmission measurements. While a previous approach is based on a dip-probe setup for conventional NMR probes, the new one is based on a micro-Helmholtz coil array (LiquidVoxel™). This makes the use of rectangular cuvettes possible, which ensure well-defined pathlengths allowing for quantification of species. Additionally, very low quantities of compound can be analyzed due to the microfabrication and small cuvette size used. As proof-of-principle this new setup for combined UV/Vis and NMR spectroscopy is used to examine a well-studied photochromic system of the dithienylethene compound class. A thorough comparison of the pros and cons of the two setups for combined UV/Vis and NMR measurements is performed.
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Affiliation(s)
- Dominik Herold
- Technische Universität Darmstadt/Technical University of Darmstadt, Clemens-Schöpf-Institut für Organische Chemie und Biochemie/Clemens Schöpf Institute of Organic Chemistry and Biochemistry, Darmstadt, D-64289, Germany
| | - Matthias Brauser
- Technische Universität Darmstadt/Technical University of Darmstadt, Clemens-Schöpf-Institut für Organische Chemie und Biochemie/Clemens Schöpf Institute of Organic Chemistry and Biochemistry, Darmstadt, D-64289, Germany
| | - Jonas Kind
- Technische Universität Darmstadt/Technical University of Darmstadt, Clemens-Schöpf-Institut für Organische Chemie und Biochemie/Clemens Schöpf Institute of Organic Chemistry and Biochemistry, Darmstadt, D-64289, Germany
| | - Christina M Thiele
- Technische Universität Darmstadt/Technical University of Darmstadt, Clemens-Schöpf-Institut für Organische Chemie und Biochemie/Clemens Schöpf Institute of Organic Chemistry and Biochemistry, Darmstadt, D-64289, Germany
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2
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Yao Q, Pan X, Si X, Wang X, Zhang X, Hou J, Su J, Qiu Y, Li J. A porous and photoactive Ti-MOF based on a novel tetranuclear [Ti 2Tb 2] cluster. Chem Commun (Camb) 2024; 60:2188-2191. [PMID: 38295378 DOI: 10.1039/d3cc06114k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024]
Abstract
A robust and porous titanium metal-organic framework (Ti-MOF; LCU-505) has been solvothermally synthesized based on an unprecedented tetranuclear Ti2(μ3-O)2Tb2(μ2-CH3COO)2(H2O)4(OOC-)8 cluster (abbreviated as [Ti2Tb2]) and tritopic 4,4',4''-s-triazine-2,4,6-triyl-tribenzoic acid ligand (H3TATB). LCU-505 shows remarkable water stability and permanent porosity for N2 and CO2 gas adsorption. Moreover, LCU-505 demonstrates n-type semiconductor behavior and good photocatalytic activity in the degradation of organic dyes.
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Affiliation(s)
- Qingxia Yao
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, PR China.
| | - Xuze Pan
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, PR China.
| | - Xuezhen Si
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, PR China.
| | - Xin Wang
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, PR China.
| | - Xiaoying Zhang
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, PR China.
| | - Jinle Hou
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, PR China.
| | - Jie Su
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, PR China.
| | - Yi Qiu
- College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, PR China.
| | - Jun Li
- School of Chemistry and Chemical Engineering, and Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, PR China.
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3
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Mohammed W, Matalkeh M, Al Soubaihi RM, Elzatahry A, Saoud KM. Visible Light Photocatalytic Degradation of Methylene Blue Dye and Pharmaceutical Wastes over Ternary NiO/Ag/TiO 2 Heterojunction. ACS OMEGA 2023; 8:40063-40077. [PMID: 37929122 PMCID: PMC10620881 DOI: 10.1021/acsomega.3c01766] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Accepted: 10/03/2023] [Indexed: 11/07/2023]
Abstract
Ternary NiO/Ag/TiO2 heterojunction photocatalyst was prepared by deposition coprecipitation for visible light photocatalytic applications. Physicochemical properties of the synthesized NiO/Ag/TiO2 composite were characterized by X-ray diffraction, Brunauer-Emmett-Teller surface area measurement method, transmission electron microscopy, energy-dispersive X-ray spectroscopy techniques, X-ray photoelectron spectroscopy technique, and ultraviolet-visible absorption spectroscopy. The results suggest that the well-dispersed small metallic silver nanoparticles (<3 nm) facilitate electron transfer and bridge nickel oxide and titanium oxide. The photocatalytic degradation and the methylene blue (MB) dye kinetics were carried out on a ternary NiO/Ag/TiO2 composite and compared to bare TiO2 under visible light irradiation. The results indicate that NiO/Ag/TiO2 has superior MB photodegradation efficiency with a high reaction rate constant and low degradation time (93.15% within 60 min) compared to Ag/TiO2, NiO/TiO2, and bare TiO2. NiO/Ag/TiO2 nanocomposite was also investigated for the most common pharmaceutical waste degradation and exhibited excellent degradation efficiency. The enhancement of the composite's performance could be attributed to the surface plasmonic resonance of the Ag nanoparticles, the formation of Schottky junctions at the Ag-TiO2 and Ag-NiO interface, and the p-n heterojunction between NiO and TiO2. Ag NPs act as a photosynthesizer and a photocatalyst, facilitate electron transfer, shift the absorption to the visible light region, reduce the band gap of TiO2, suppress the electron-hole recombination, and enhance the photocatalytic activity and stability as a result.
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Affiliation(s)
- Widad Mohammed
- Material
Science and Technology Program, College of Arts and Sciences, Qatar University, 2713 Doha, Qatar
| | - Maha Matalkeh
- Liberal
Arts and Science, Virginia Commonwealth
University School of Arts in Qatar, PO Box 8095, Doha, Qatar
| | - Rola Mohammad Al Soubaihi
- Functional
NanoMaterials Group, Department of Applied Physics, School of Engineering
Sciences, KTH Royal Institute of Technology, Hannes Alfvéns väg
12, 11419 Stockholm, Sweden
| | - Ahmed Elzatahry
- Material
Science and Technology Program, College of Arts and Sciences, Qatar University, 2713 Doha, Qatar
| | - Khaled M. Saoud
- Liberal
Arts and Science, Virginia Commonwealth
University School of Arts in Qatar, PO Box 8095, Doha, Qatar
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4
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Verástegui-Domínguez LH, Elizondo-Villarreal N, Martínez-Delgado DI, Gracia-Pinilla MÁ. Eco-Friendly Reduction of Graphene Oxide by Aqueous Extracts for Photocatalysis Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3882. [PMID: 36364657 PMCID: PMC9655637 DOI: 10.3390/nano12213882] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/24/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
In the present work, reduced graphene oxide was obtained by green synthesis, using extracts of Larrea tridentata (gobernadora) and Capsicum Chinense (habanero). Graphene oxide was synthesized by the modified Hummers' method and subsequently reduced using natural extracts to obtain a stable and environmentally friendly graphene precursor. Consequently, the gobernadora aqueous extract was found to have a better reducing power than the habanero aqueous extract. This opportunity for green synthesis allows the application of RGO in photocatalysis for the degradation of the methylene blue dye. Degradation efficiencies of 60% and 90% were obtained with these materials.
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Affiliation(s)
- Luz H. Verástegui-Domínguez
- Materiales Nanoestructurados (CICFIM), Facultad de Ciencias Físico Matemáticas (FCFM), Universidad Autónoma de Nuevo León (UANL), 66450 San Nicolás de los Garza, N.L., Mexico
| | - Nora Elizondo-Villarreal
- Materiales Nanoestructurados (CICFIM), Facultad de Ciencias Físico Matemáticas (FCFM), Universidad Autónoma de Nuevo León (UANL), 66450 San Nicolás de los Garza, N.L., Mexico
| | - Dora Irma Martínez-Delgado
- Materiales Nanoestructurados (CICFIM), Facultad de Ciencias Físico Matemáticas (FCFM), Universidad Autónoma de Nuevo León (UANL), 66450 San Nicolás de los Garza, N.L., Mexico
| | - Miguel Ángel Gracia-Pinilla
- Materiales Nanoestructurados (CICFIM), Facultad de Ciencias Físico Matemáticas (FCFM), Universidad Autónoma de Nuevo León (UANL), 66450 San Nicolás de los Garza, N.L., Mexico
- Mesoscale Chemical Systems, MESA+ Institute, University of Twente, P.O. Box 217, 7500AE Enschede, The Netherlands
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Kerek Á, Sasvári M, Jerzsele Á, Somogyi Z, Janovák L, Abonyi-Tóth Z, Dékány I. Photoreactive Coating Material as an Effective and Durable Antimicrobial Composite in Reducing Bacterial Load on Surfaces in Livestock. Biomedicines 2022; 10:biomedicines10092312. [PMID: 36140413 PMCID: PMC9496029 DOI: 10.3390/biomedicines10092312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 09/12/2022] [Accepted: 09/14/2022] [Indexed: 11/29/2022] Open
Abstract
Titanium dioxide (TiO2) is a well-known photocatalytic compound that can be used to effectively reduce the presence of pathogens in human and animal hospitals via ROS release. The aim of this study was to investigate the efficacy of a polymer-based composite layer containing TiO2 and zinc oxide (ZnO) against Escherichia coli (E. coli) of animal origin. We showed that the photocatalyst coating caused a significant (p < 0.001) reduction in pathogen numbers compared to the control with an average reduction of 94% over 30 min. We used six light sources of different wattages (4 W, 7 W, 9 W, 12 W, 18 W, 36 W) at six distances (35 cm, 100 cm, 150 cm, 200 cm, 250 cm, 300 cm). Samples (n = 2160) were taken in the 36 settings and showed no significant difference in efficacy between light intensity and distance. We also investigated the influence of organic contaminant that resulted in lower activity as well as the effect of a water jet and a high-pressure device on the antibacterial activity. We found that the latter completely removed the coating from the surface, which significantly (p < 0.0001) reduced its antibacterial potential. As a conclusion, light intensity and distance does not reduce the efficacy of the polymer, but the presence of organic contaminants does.
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Affiliation(s)
- Ádám Kerek
- Department of Pharmacology and Toxicology, University of Veterinary Medicine, István Street 2, H-1078 Budapest, Hungary
- Correspondence: (Á.K.); (I.D.)
| | - Mátyás Sasvári
- Department of Pharmacology and Toxicology, University of Veterinary Medicine, István Street 2, H-1078 Budapest, Hungary
| | - Ákos Jerzsele
- Department of Pharmacology and Toxicology, University of Veterinary Medicine, István Street 2, H-1078 Budapest, Hungary
| | - Zoltán Somogyi
- Department of Pharmacology and Toxicology, University of Veterinary Medicine, István Street 2, H-1078 Budapest, Hungary
| | - László Janovák
- Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary
| | - Zsolt Abonyi-Tóth
- Department of Biomathematics and Informatics, University of Veterinary Medicine, István Street 2, H-1078 Budapest, Hungary
| | - Imre Dékány
- Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary
- Correspondence: (Á.K.); (I.D.)
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6
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Sun S, Li S, Hao Y, Yang X, Dou X. Construction of g/C3N4-ZnO composites with enhanced visible-light photocatalytic activity for degradation of amoxicillin. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-022-1181-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Cai C, Fan G, Du B, Chen Z, Lin J, Yang S, Lin X, Li X. Metal–organic-framework-based photocatalysts for microorganism inactivation: a review. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00393g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A metal–organic framework (MOF) is a porous coordination material composed of multidentate organic ligands and metal ions or metal clusters.
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Affiliation(s)
- Chenjian Cai
- College of Civil Engineering, Fuzhou University, 350116 Fujian, PR China
| | - Gongduan Fan
- College of Civil Engineering, Fuzhou University, 350116 Fujian, PR China
- State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, 350002 Fujian, China
| | - Banghao Du
- College of Civil Engineering, Fuzhou University, 350116 Fujian, PR China
| | - Zhuoyi Chen
- College of Civil Engineering, Fuzhou University, 350116 Fujian, PR China
| | - JiuHong Lin
- College of Civil Engineering, Fuzhou University, 350116 Fujian, PR China
| | - Shangwu Yang
- College of Civil Engineering, Fuzhou University, 350116 Fujian, PR China
| | - Xin Lin
- College of Civil Engineering, Fuzhou University, 350116 Fujian, PR China
| | - Xia Li
- College of Civil Engineering, Fuzhou University, 350116 Fujian, PR China
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8
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Náfrádi M, Alapi T, Bencsik G, Janáky C. Impact of Reaction Parameters and Water Matrices on the Removal of Organic Pollutants by TiO 2/LED and ZnO/LED Heterogeneous Photocatalysis Using 365 and 398 nm Radiation. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 12:nano12010005. [PMID: 35009961 PMCID: PMC8746656 DOI: 10.3390/nano12010005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/13/2021] [Accepted: 12/15/2021] [Indexed: 05/05/2023]
Abstract
In this work, the application of high-power LED365nm and commercial, low-price LED398nm for heterogeneous photocatalysis with TiO2 and ZnO photocatalysts are studied and compared, focusing on the effect of light intensity, photon energy, quantum yield, electrical energy consumption, and effect of matrices and inorganic components on radical formation. Coumarin (COU) and its hydroxylated product (7-HC) were used to investigate operating parameters on the •OH formation rate. In addition to COU, two neonicotinoids, imidacloprid and thiacloprid, were also used to study the effect of various LEDs, matrices, and inorganic ions. The transformation of COU was slower for LED398nm than for LED365nm, but r07-HC/r0COU ratio was significantly higher for LED398nm. The COU mineralization rate was the same for both photocatalysts using LED365nm, but a significant difference was observed using LED398nm. The impact of matrices and their main inorganic components Cl- and HCO3- were significantly different for ZnO and TiO2. The negative effect of HCO3- was evident, however, in the case of high-power LED365nm and TiO2, and the formation of CO3•- almost doubled the r07-HC and contributes to the conversion of neonicotinoids by altering the product distribution and mineralization rate.
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Affiliation(s)
- Máté Náfrádi
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary;
| | - Tünde Alapi
- Department of Inorganic and Analytical Chemistry, University of Szeged, Dóm tér 7, H-6720 Szeged, Hungary;
- Correspondence:
| | - Gábor Bencsik
- Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary; (G.B.); (C.J.)
| | - Csaba Janáky
- Department of Physical Chemistry and Materials Science, University of Szeged, Rerrich Béla tér 1, H-6720 Szeged, Hungary; (G.B.); (C.J.)
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Bimová P, Barbieriková Z, Grenčíková A, Šípoš R, Škulcová AB, Krivjanská A, Mackuľak T. Environmental risk of nanomaterials and nanoparticles and EPR technique as an effective tool to study them-a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:22203-22220. [PMID: 33733403 DOI: 10.1007/s11356-021-13270-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
Nanotechnologies and different types of nanomaterials belong in present day to intensively studied materials due to their unique properties and diverse potential applications in, e.g., electronics, medicine, or display technologies. Together with the investigation of their desired beneficial properties, a need to investigate and evaluate their influence on the environment and possible harmful effects towards living organisms is growing. This review summarizes possible toxic effects of nanomaterials on environment and living organisms, focusing on the possible bioaccumulation in organisms, toxicity, and its mechanisms. The main goal of this review is to refer to potential environmental risks rising from the use of nanomaterials and the necessity to deal with the possible toxic effects considering the growing interest in the wide-scale utilization of these materials. Electron paramagnetic resonance spectroscopy as the only analytical technique capable of detecting radical species enables detection, quantification, and monitoring of the generation of short-lived radicals often coupled with toxic effects of nanomaterials, which makes it an important method in the process of nanotoxicity mechanism determination.
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Affiliation(s)
- Paula Bimová
- Department of Inorganic Technology, Institute of Inorganic Chemistry, Technology and Materials, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovakia.
| | - Zuzana Barbieriková
- Department of Physical Chemistry, Institute of Physical Chemistry and Chemical Physics, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovakia
| | - Anna Grenčíková
- Department of Environmental Engineering, Institute of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovakia
| | - Rastislav Šípoš
- Department of Inorganic Chemistry, Institute of Inorganic Chemistry, Technology and Materials, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovakia
| | - Andrea Butor Škulcová
- Department of Environmental Engineering, Institute of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovakia
| | - Anna Krivjanská
- Department of Environmental Engineering, Institute of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovakia
| | - Tomáš Mackuľak
- Department of Environmental Engineering, Institute of Chemical and Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37, Bratislava, Slovakia
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He M, Wan Z, Tsang DCW, Sun Y, Khan E, Hou D, Graham NJD. Performance indicators for a holistic evaluation of catalyst-based degradation-A case study of selected pharmaceuticals and personal care products (PPCPs). JOURNAL OF HAZARDOUS MATERIALS 2021; 402:123460. [PMID: 32683158 DOI: 10.1016/j.jhazmat.2020.123460] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 07/08/2020] [Accepted: 07/08/2020] [Indexed: 06/11/2023]
Abstract
Considerable efforts have been made to develop effective and sustainable catalysts, e.g., carbon-/biochar-based catalyst, for the decontamination of organic pollutants in water/wastewater. Most of the published studies evaluated the catalytic performance mainly upon degradation efficiency of parent compounds; however, comprehensive and field-relevant performance assessment is still in need. This review critically analysed the performance indicators for carbon-/biochar-based catalytic degradation from the perspectives of: (1) degradation of parent compounds, i.e., concentrations, kinetics, reactive oxidative species (ROS) analysis, and residual oxidant concentration; (2) formation of intermediates and by-products, i.e., intermediates analysis, evolution of inorganic ions, and total organic carbon (TOC); and (3) impact assessment of treated samples, i.e., toxicity evolution, disinfection effect, and biodegradability test. Five most frequently detected pharmaceuticals and personal care products (PPCPs) (sulfamethoxazole, carbamazepine, ibuprofen, diclofenac, and acetaminophen) were selected as a case study to articulate the performance indicators for a holistic evaluation of carbon-/biochar-based catalytic degradation. This review also encourages the development of alternative performance indicators to facilitate the rational design of catalysts in future studies.
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Affiliation(s)
- Mingjing He
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Zhonghao Wan
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Daniel C W Tsang
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Yuqing Sun
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
| | - Eakalak Khan
- Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, NV, 89154, USA
| | - Deyi Hou
- School of Environment, Tsinghua University, Beijing, 100084, China
| | - Nigel J D Graham
- Faculty of Engineering, Department of Civil and Environmental Engineering, Imperial College London, South Kensington Campus, London, SW7 2AZ, United Kingdom
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11
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Yang L, Peng Y, Luo X, Dan Y, Ye J, Zhou Y, Zou Z. Beyond C 3N 4 π-conjugated metal-free polymeric semiconductors for photocatalytic chemical transformations. Chem Soc Rev 2021; 50:2147-2172. [PMID: 33331365 DOI: 10.1039/d0cs00445f] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Photocatalysis with stable, efficient and inexpensive metal-free catalysts is one of the most promising options for non-polluting energy production. This review article covers the state-of-the-art development of various effective metal-free polymeric photocatalysts with large π-conjugated units for chemical transformations including water splitting, CO2 and N2 reduction, organic synthesis and monomer polymerisation. The article starts with the catalytic mechanisms of metal-free photocatalysts. Then a particular focus is on the rational manipulation of π-conjugation enlargement, charge separation, electronic structures and band structures in the design of metal-free polymeric photocatalysts. Following the design principles, the selection and construction of functional units are discussed, as well as the connecting bonds and dimensions of π-conjugated polymeric photocatalysts. Finally the hot and emerging applications of metal-free polymeric photocatalysts for photocatalytic chemical transformations are summarized. The strategies provide potential avenues to address the challenges of catalyst activity, selectivity and stability in the further development of highly effective metal-free polymeric photocatalysts.
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Affiliation(s)
- Long Yang
- State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P. R. China.
| | - Yuting Peng
- State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P. R. China.
| | - Xuedan Luo
- State Key Laboratory of Environment-Friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, Sichuan, P. R. China.
| | - Yi Dan
- State Key Laboratory of Polymer Materials Engineering of China (Sichuan University), Polymer Research Institute of Sichuan University, Chengdu 610065, P. R. China.
| | - Jinhua Ye
- Environmental Remediation Materials Unit National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan and TU-NIMS Joint Reseach Center School of Material Science and Engineering, Tianjin University, 92 Weijin Road, Tianjin, P. R. China
| | - Yong Zhou
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory for Nano Technology, School of Physics, Nanjing University, Nanjing 210093, P. R. China. and The School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, P. R. China
| | - Zhigang Zou
- National Laboratory of Solid State Microstructures, Collaborative Innovation Center of Advanced Microstructures, Jiangsu Key Laboratory for Nano Technology, School of Physics, Nanjing University, Nanjing 210093, P. R. China. and The School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen 518172, P. R. China
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12
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Lee GJ, Hou YH, Liu N, Wu JJ. Enhanced photocatalytic hydrogen and methane evolution using chalcogenide with metal ion modification via a microwave-assisted solvothermal method. Catal Today 2020. [DOI: 10.1016/j.cattod.2019.06.068] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Microwave-Assisted Solvothermal Synthesis of Chalcogenide Composite Photocatalyst and Its Photocatalytic CO2 Reduction Activity under Simulated Solar Light. Catalysts 2020. [DOI: 10.3390/catal10070789] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A novel heterostructure consisting of Ru and Cu co-doped ZnS nanopowders (RCZS) into a MoS2-graphene hybrid (MSG) is successfully prepared by the microwave-assisted solvothermal approach. RCZS nanopowders are fabricated on the surface of MSG, which produces a nanoscale interfacial between RCZS and MSG. As the photo-excited electrons of RCZS can easily migrate to MoS2 through graphene by hindering the electron and hole (e– and h+) recombination, the photocatalytic activity could be improved by effective charge transfer. As RCZS are anchored onto the MSG, the photoluminescence intensity of the chalcogenide composite photocatalyst obviously decreases. In addition, a quaternary ruthenium and copper-based chalcogenide RCZS/MSG is able to improve the harvest and utilization of light. With the increase in the concentrations of Ru until 4 mol%, the band gap significantly decreases from 3.52 to 2.73 eV. At the same time, moderate modification by ruthenium can decrease the PL intensity compared to the pristine CZS/MSG sample, which indicates the enhancement of e– and h+ separation by Ru addition. The photocatalytic activity of as-synthesized chalcogenide composite photocatalysts is evaluated by the photocatalytic carbon dioxide reduction. Optimized operation conditions for carbon dioxide reduction have been performed, including the concentration of NaOH solution, the amount of RCZS/MSG photocatalyst, and the content of co-doped ruthenium. The doping of ruthenium would efficiently improve the performance of the photocatalytic activity for carbon dioxide reduction. The optimal conditions, such as the concentration of 2 M NaOH and the 0.5RCZS/MSG dosage of 0.05 g L–1, provide the maximum methane gas yield of 58.6 μmol h−1 g–1.
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Náfrádi M, Farkas L, Alapi T, Hernádi K, Kovács K, Wojnárovits L, Takács E. Application of coumarin and coumarin-3-carboxylic acid for the determination of hydroxyl radicals during different advanced oxidation processes. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2019.108610] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Croxall MP, Lawrence RT, Goh MC. 1H NMR as a quick screen for photocatalytic reaction efficiency. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111965] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Muñoz-Batista MJ, Ballari MM, Kubacka A, Alfano OM, Fernández-García M. Braiding kinetics and spectroscopy in photo-catalysis: the spectro-kinetic approach. Chem Soc Rev 2018; 48:637-682. [PMID: 30516217 DOI: 10.1039/c8cs00108a] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The combination of kinetic and spectroscopic tools has become a key scientific methodology for the understanding of catalytic behavior but its application in photocatalysis has inherent difficulties due to the nature of the energy source of the reaction. This review article provides an overview of its use by, first, presenting mechanistically derived kinetic formulations and spectroscopic data handling methods including intrinsic expressions for light and, second, highlighting representative examples of application. To do it we consider universal catalytic systems, particularly (although not exclusively) titania-based materials, and the most frequent hole and/or electron triggered reaction schemes. This review also provides a general framework to pave the way for the future progress of the spectro-kinetic approach in the photocatalysis area.
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Affiliation(s)
- Mario J Muñoz-Batista
- Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie, 2, 28049 Madrid, Spain. and Departamento de Química Orgánica, Universidad de Córdoba, Edif. Marie Curie, Ctra Nnal IV-A, Km 396, E14014, Córdoba, Spain
| | - María M Ballari
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC, UNL-CONICET), Güemes 3450, 3000, Santa Fe, Argentina.
| | - Anna Kubacka
- Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie, 2, 28049 Madrid, Spain.
| | - Orlando M Alfano
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC, UNL-CONICET), Güemes 3450, 3000, Santa Fe, Argentina.
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17
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Limo MJ, Sola-Rabada A, Boix E, Thota V, Westcott ZC, Puddu V, Perry CC. Interactions between Metal Oxides and Biomolecules: from Fundamental Understanding to Applications. Chem Rev 2018; 118:11118-11193. [PMID: 30362737 DOI: 10.1021/acs.chemrev.7b00660] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Metallo-oxide (MO)-based bioinorganic nanocomposites promise unique structures, physicochemical properties, and novel biochemical functionalities, and within the past decade, investment in research on materials such as ZnO, TiO2, SiO2, and GeO2 has significantly increased. Besides traditional approaches, the synthesis, shaping, structural patterning, and postprocessing chemical functionalization of the materials surface is inspired by strategies which mimic processes in nature. Would such materials deliver new technologies? Answering this question requires the merging of historical knowledge and current research from different fields of science. Practically, we need an effective defragmentation of the research area. From our perspective, the superficial accounting of material properties, chemistry of the surfaces, and the behavior of biomolecules next to such surfaces is a problem. This is particularly of concern when we wish to bridge between technologies in vitro and biotechnologies in vivo. Further, besides the potential practical technological efficiency and advantages such materials might exhibit, we have to consider the wider long-term implications of material stability and toxicity. In this contribution, we present a critical review of recent advances in the chemistry and engineering of MO-based biocomposites, highlighting the role of interactions at the interface and the techniques by which these can be studied. At the end of the article, we outline the challenges which hamper progress in research and extrapolate to developing and promising directions including additive manufacturing and synthetic biology that could benefit from molecular level understanding of interactions occurring between inanimate (abiotic) and living (biotic) materials.
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Affiliation(s)
- Marion J Limo
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom.,Interface and Surface Analysis Centre, School of Pharmacy , University of Nottingham , University Park, Nottingham NG7 2RD , United Kingdom
| | - Anna Sola-Rabada
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Estefania Boix
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom.,Department of Bioproducts and Biosystems , Aalto University , P.O. Box 16100, FI-00076 Aalto , Finland
| | - Veeranjaneyulu Thota
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Zayd C Westcott
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Valeria Puddu
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
| | - Carole C Perry
- Interdisciplinary Biomedical Research Centre, School of Science and Technology , Nottingham Trent University , Clifton Lane, Nottingham NG11 8NS , United Kingdom
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Deepika S, Harishkumar R, Dinesh M, Abarna R, Anbalagan M, Roopan SM, Selvaraj CI. Photocatalytic degradation of synthetic food dye, sunset yellow FCF (FD&C yellow no. 6) by Ailanthus excelsa Roxb. possessing antioxidant and cytotoxic activity. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 177:44-55. [PMID: 29049940 DOI: 10.1016/j.jphotobiol.2017.10.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 09/28/2017] [Accepted: 10/09/2017] [Indexed: 12/17/2022]
Abstract
The purpose of our work is to identify the bioactive compounds of bark and leaves extract from Ailanthus excelsa Roxb. and to explore its effectiveness against synthetic food dye. The presence of primary and secondary metabolites was confirmed by carrying out phytochemicals analysis. With the prior knowledge accessible on the indispensable secondary metabolites holding antioxidant and cytotoxicity activity, the quantitative screening of total phenolic and flavonoid content in methanolic and aqueous extract of bark and leaves from Ailanthus excelsa were done. Comparatively, a higher value of flavonoid (161±0.3μg/mg) and phenolic acid content (152.4±0.14μg/mg) was found in bark extract. By FTIR analysis, the characteristic peak was obtained at 1581.63 and 1598.99cm-1 confirmed the presence of functional groups associated to flavonoids and other phenolic groups respectively. In bark extract, 81% of DPPH inhibition was observed when compared to ascorbic acid (standard) 92% of free radical scavenging activity. Bark extract from Ailanthus excelsa exhibited 71% cytotoxicity against HeLa cell line (cervical cancer). In examining the toxicity level of crude extracts with red blood cells (RBC), the bark extract was showed a very less (2.8%) haemolytic activity. They also showed maximum zone of inhibition in antibacterial activity i.e. 13±0.5mm against Escherichia coli culture. At a concentration of 10mg/mL of crude extract from A. excelsa, 55% degradation of sunset yellow dye was observed. It concludes that, the compounds present in the A. excelsa, especially the bark extract showed better photocatalytic, haemolytic, antioxidant, cytotoxicity and antibacterial activity when compared to leaves extract.
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Affiliation(s)
- Subramanyam Deepika
- Department of Biotechnology, School of Biosciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Rajendran Harishkumar
- Department of Biotechnology, School of Biosciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Murugesan Dinesh
- Department of Biotechnology, School of Biosciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Rajadurai Abarna
- Department of Integrative Biology, School of Biosciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Moorthy Anbalagan
- Department of Integrative Biology, School of Biosciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India
| | - Selvaraj Mohana Roopan
- Chemistry of Heterocycles & Natural Product Research Laboratory, Department of Chemistry, School of Advanced Sciences, VIT University, Vellore 632 014, Tamil Nadu, India.
| | - Chinnadurai Immanuel Selvaraj
- Department of Biotechnology, School of Biosciences and Technology, VIT University, Vellore 632014, Tamil Nadu, India.
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Tanabe T, Miyazawa W, Gunji T, Hashimoto M, Kaneko S, Nozawa T, Miyauchi M, Matsumoto F. Site-selective deposition of binary Pt–Pb alloy nanoparticles on TiO2 nanorod for acetic acid oxidative decomposition. J Catal 2016. [DOI: 10.1016/j.jcat.2016.05.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Positive impedance humidity sensors via single-component materials. Sci Rep 2016; 6:25574. [PMID: 27150936 PMCID: PMC4858685 DOI: 10.1038/srep25574] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 04/15/2016] [Indexed: 11/24/2022] Open
Abstract
Resistivity-type humidity sensors have been investigated with great interest due to the increasing demands in industry, agriculture and daily life. To date, most of the available humidity sensors have been fabricated based on negative humidity impedance, in which the electrical resistance decreases as the humidity increases, and only several carbon composites have been reported to present positive humidity impedance. However, here we fabricate positive impedance humidity sensors only via single-component WO3−x crystals. The resistance of WO3−x crystal sensors in response to relative humidity could be tuned from a negative to positive one by increasing the compositional x. And it was revealed that the positive humidity impedance was driven by the defects of oxygen vacancy. This result will extend the application field of humidity sensors, because the positive humidity impedance sensors would be more energy-efficient, easier to be miniaturized and electrically safer than their negative counterparts for their lower operation voltages. And we believe that constructing vacancies in semiconducting materials is a universal way to fabricate positive impedance humidity sensors.
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Qian J, Zhao Z, Shen Z, Zhang G, Peng Z, Fu X. Oxide vacancies enhanced visible active photocatalytic W19O55 NMRs via strong adsorption. RSC Adv 2016. [DOI: 10.1039/c5ra23655j] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Oxide vacancies enhanced visible active photocatalytic W19O55 nano-/micron-rods (NMRs) on methylene blue (MB) and rhodamine B (RhB) via strong adsorption.
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Affiliation(s)
- Jingwen Qian
- School of Engineering and Technology
- China University of Geosciences
- Beijing 100083
- P. R. China
- State Key Laboratory of Information Photonics and Optical Communications and School of Science
| | - Zengying Zhao
- School of Science
- China University of Geosciences
- Beijing 100083
- P. R. China
| | - Zhenguang Shen
- School of Engineering and Technology
- China University of Geosciences
- Beijing 100083
- P. R. China
- State Key Laboratory of Information Photonics and Optical Communications and School of Science
| | - Guoliang Zhang
- School of Engineering and Technology
- China University of Geosciences
- Beijing 100083
- P. R. China
| | - Zhijian Peng
- School of Engineering and Technology
- China University of Geosciences
- Beijing 100083
- P. R. China
| | - Xiuli Fu
- State Key Laboratory of Information Photonics and Optical Communications and School of Science
- Beijing University of Posts and Telecommunications
- Beijing 100876
- P. R. China
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22
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Zheng T, Wu C, Chen M, Zhang Y, Cummings PT. Molecular mechanics of the cooperative adsorption of a Pro-Hyp-Gly tripeptide on a hydroxylated rutile TiO2(110) surface mediated by calcium ions. Phys Chem Chem Phys 2016; 18:19757-64. [DOI: 10.1039/c6cp03046g] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Calcium ions play an cooperative role during peptide adsorption on the hydroxylated rutile TiO2(110) surface and the molecular mechanics was studied.
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Affiliation(s)
- Ting Zheng
- State Key Laboratory of Robotics and System
- and School of Mechatronics Engineering
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Chunya Wu
- State Key Laboratory of Robotics and System
- and School of Mechatronics Engineering
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Mingjun Chen
- State Key Laboratory of Robotics and System
- and School of Mechatronics Engineering
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Yu Zhang
- Department of Chemical and Biomolecular Engineering
- and Multiscale Modeling and Simulation Center
- Vanderbilt University
- Nashville
- USA
| | - Peter T. Cummings
- Department of Chemical and Biomolecular Engineering
- and Multiscale Modeling and Simulation Center
- Vanderbilt University
- Nashville
- USA
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Xu P, Wang R, Ouyang J, Chen B. A new strategy for TiO2 whiskers mediated multi-mode cancer treatment. NANOSCALE RESEARCH LETTERS 2015; 10:94. [PMID: 25852390 PMCID: PMC4385221 DOI: 10.1186/s11671-015-0796-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Accepted: 01/31/2015] [Indexed: 05/18/2023]
Abstract
Traditional Chinese medicine (TCM) which functions as chemotherapeutic or adjuvantly chemotherapeutic agents has been drawing a great many eyeballs for its easy obtain and significant antitumor effects accompanied with less toxic and side effects. PDT (photodynamic therapy) utilizes the fact that certain compounds coined as photosensitizers, when exposed to light of a specific wavelength, are capable of generating cytotoxic reactive oxygen species (ROS) such as hydroxyl radical, hydrogen peroxide, and superoxide to kill cancer cells. Combinations of cancer therapeutic modalities are studied to improve the efficacy of treatment. This study aimed to explore a new strategy of coupling of titanium dioxide whiskers (TiO2 Ws) with the anticancer drug gambogic acid (GA) in photodynamic therapy. The nanocomposites were coined as GA-TiO2. The combination of TiO2 Ws with GA induced a remarkable enhancement in antitumor activity estimated by MTT assay, nuclear DAPI staining, and flow cytometry. Furthermore, the possible signaling pathway was explored by reverse transcription polymerase chain reaction (RT-PCR) and Western blot assay. These results identify TiO2 Ws of good biocompatibility and photocatalytic activity. In human leukemia cells (K562 cells), TiO2 Ws could obviously increase the intracellular concentration of GA and enhance its potential antitumor efficiency, suggesting that TiO2 Ws could act as an efficient drug delivery carrier targeting GA to carcinoma cells. Moreover, photodynamic GA-TiO2 nanocomposites could induce an evident reinforcement in antitumor activity with UV illumination. These results reveal that such modality combinations put forward a promising proposal in cancer therapy.
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Affiliation(s)
- Peipei Xu
- />Department of Hematology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008 People’s Republic of China
| | - Ruju Wang
- />Medical School, Southeast University, Nanjing, 210009 People’s Republic of China
| | - Jian Ouyang
- />Department of Hematology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008 People’s Republic of China
| | - Bing Chen
- />Department of Hematology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210008 People’s Republic of China
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