1
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Khannyra S, Gil MLA, Addou M, Mosquera MJ. Dye decomposition and air de-pollution performance of TiO 2/SiO 2 and N-TiO 2/SiO 2 photocatalysts coated on Portland cement mortar substates. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:63112-63125. [PMID: 35459995 PMCID: PMC9477917 DOI: 10.1007/s11356-022-20228-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 04/09/2022] [Indexed: 06/14/2023]
Abstract
In this study, the newly synthesized TiO2 and N doped TiO2 clusters were added to silica sol to synthesize N-TiO2/SiO2 composites via the sol-gel method. Afterwards, the prepared sols were applied by brushing on portland cement. Doping with nitrogen significantly increased the absorption of TiO2 towards the visible region, thus, increasing the photocatalytic activity. SEM characterization of the treated samples showed that the clusters were distributed in form of aggregates on the samples' surface. The self-cleaning and air de-polluting performances were assessed through methylene blue degradation and the oxidation of nitrogen oxide, resulting in methylene blue (MB) removal of 85% and 78% after 60 min of irradiation for SN10TiO2 and STiO2, respectively. Regarding air de-pollution performance, the newly synthesized photocatalysts showed the ability of NOx reduction. However, their efficiency was somewhat lower, in which 23.81% of NO has been oxidized by the sample SN10TiO2, while SP25 showed a total NO conversion of 38.98%. The powdered xerogels of the newly synthesized nanoparticles revealed high photocatalytic efficiency concerning NO oxidation, resulting in a higher performance compared to those obtained by the xerogel containing P25.
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Affiliation(s)
- Souad Khannyra
- TEP-243 Nanomaterials Group, Department of Physical-Chemistry, Faculty of Sciences, University of Cadiz, 11510, Puerto Real, Spain
- Materials and Valorization of Natural Resource Laboratory, FST Tangier, Abdelmalek Essaadi University, Tétouan, Morocco
| | - Maria Luisa Almoraima Gil
- TEP-243 Nanomaterials Group, Department of Physical-Chemistry, Faculty of Sciences, University of Cadiz, 11510, Puerto Real, Spain.
| | - Mohammed Addou
- Materials and Valorization of Natural Resource Laboratory, FST Tangier, Abdelmalek Essaadi University, Tétouan, Morocco
| | - Maria Jesus Mosquera
- TEP-243 Nanomaterials Group, Department of Physical-Chemistry, Faculty of Sciences, University of Cadiz, 11510, Puerto Real, Spain
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2
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Cai D, Tao E, Yang S, Ma Z, Li Y, Liu L, Wang D, Qian J. Effect of mixed-phase TiO2 doped with Ca2+ on charge transfer at the TiO2/graphene interface. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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3
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Biswas A, Kar U, Jana NR. Cytotoxicity of ZnO Nanoparticle Under Dark via Oxygen Vacancy Dependent Reactive Oxygen Species Generation. Phys Chem Chem Phys 2022; 24:13965-13975. [DOI: 10.1039/d2cp00301e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Antimicrobial and cytotoxic effect of zinc oxide nanomaterials are popularly thought due to zinc ion leaching, but the exact mechanism of cytotoxicity is controversial and not fully understood. Recent works...
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4
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Li F, Wang D, Gong XQ. Subtle structure matters: boosting surface-directed photoelectron transfer via the introduction of specific monovalent oxygen vacancies in TiO 2. Phys Chem Chem Phys 2021; 23:19854-19861. [PMID: 34525137 DOI: 10.1039/d1cp02787e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Oxygen vacancies (Ov) are widely considered to play crucial roles in photocatalysis, but how and why they contribute to improved performances remains controversial. In this work, we studied the promotional effect of Ov on photoelectron transfer in TiO2, using first-principles density functional theory calculations with correction for on-site Coulomb interactions. We explicitly identified three types of Ov with different charge states (i.e., charge-neutral , monovalent , divalent Ov2+) via electronic structure analysis. Electron transfer energy calculations revealed that the ionized Ov in anatase TiO2 are able to collect excess electrons whereas those in the rutile phase are not. The presence of ionized Ov further endows anatase TiO2 with directional electron transfer along the [100] orientation, in favor of anatase TiO2(101) for photocatalytic reduction surpassing the (001) termination. After examining various combination modes of ionized Ov involving different charge states and spatial distributions, we demonstrated that the vertical chain in anatase TiO2(101) is the most catalytically effective Ov pattern in TiO2. These results signify the importance of subtle defects in photocatalysis and may assist future photocatalyst design toward higher photocatalytic efficiency.
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Affiliation(s)
- Fei Li
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China.
| | - Dong Wang
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China.
| | - Xue-Qing Gong
- Key Laboratory for Advanced Materials, Centre for Computational Chemistry and Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, P. R. China.
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5
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E T, Ma Z, Cai D, Yang S, Li Y. Enhancement of Interfacial Charge Transfer of TiO 2/Graphene with Doped Ca 2+ for Improving Electrical Conductivity. ACS APPLIED MATERIALS & INTERFACES 2021; 13:41875-41885. [PMID: 34449194 DOI: 10.1021/acsami.1c07401] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Imparting surface coatings with conductivity is an effective way to prevent fire and explosion caused by electrostatic discharge. TiO2 is a commonly used paint; however, intrinsic TiO2 has poor electrical conductivity. Herein, we develop a method to make TiO2 coating highly conductive by doping Ca2+ into the TiO2 lattice based on the introduction of graphene. It is demonstrated that doping Ca2+ increases the carrier density of TiO2 and its morphology changes from a sphere to a spindle shape, which increases the interfacial contact area between TiO2 and graphene. Therefore, resistivity can be greatly decreased due to the construction of fast charge transport pathways from TiO2 to graphene, resulting from an increase in the speed of interfacial charge transfer. In addition, the electronic properties of the samples are also studied through first-principles calculations before and after Ca2+ doping. The result of the theoretical analysis is in agreement with that of experiments. Thus, the lowest resistivity of Ca2+-TiO2/graphene can reach 0.004 Ω cm. Consequently, the feature of superior conductivity of the Ca2+-TiO2/graphene composite endows it with practical application potential in the field of antistatic coating.
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Affiliation(s)
- Tao E
- Liaoning Province Key Laboratory for Synthesis and Application of Functional Compounds, College of Chemistry and Chemical Engineering, Center of Experiment Management, Bohai University, Jinzhou 121013, China
- Institute of Ocean Research, Bohai University, Jinzhou 121013, Liaoning, China
| | - Zengying Ma
- Liaoning Province Key Laboratory for Synthesis and Application of Functional Compounds, College of Chemistry and Chemical Engineering, Center of Experiment Management, Bohai University, Jinzhou 121013, China
| | - Ding Cai
- Liaoning Province Key Laboratory for Synthesis and Application of Functional Compounds, College of Chemistry and Chemical Engineering, Center of Experiment Management, Bohai University, Jinzhou 121013, China
| | - Shuyi Yang
- Liaoning Province Key Laboratory for Synthesis and Application of Functional Compounds, College of Chemistry and Chemical Engineering, Center of Experiment Management, Bohai University, Jinzhou 121013, China
| | - Yun Li
- Chemistry & Chemical Engineering of College Yantai University, Yantai 264005, China
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6
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Ma X, Hao K, Dai Y, Song L, Yu Q, Yin X, Wang Z. Enhanced Visible‐Light Photocatalytic Activity by the Comprehensive Effects of Mesoporous and N‐Doping at the Meso‐N‐TiO
2
Nanocatalysts. ChemistrySelect 2021. [DOI: 10.1002/slct.202101243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Xiuqiang Ma
- College of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China
| | - Kun Hao
- College of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China
| | - Yalu Dai
- College of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China
| | - Liang Song
- College of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China
| | - Qing Yu
- College of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China
| | - Xunqian Yin
- College of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China
| | - Zhongwei Wang
- College of Materials Science and Engineering Shandong University of Science and Technology Qingdao 266590 China
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7
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Fonseca JDM, Alves MJDS, Soares LS, Moreira RDFPM, Valencia GA, Monteiro AR. A review on TiO 2-based photocatalytic systems applied in fruit postharvest: Set-ups and perspectives. Food Res Int 2021; 144:110378. [PMID: 34053562 DOI: 10.1016/j.foodres.2021.110378] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/16/2021] [Accepted: 04/20/2021] [Indexed: 12/20/2022]
Abstract
Titanium dioxide (TiO2) is a photocatalytic material used to degrade ethylene, and it has been studied as an alternative postharvest technology. Although several studies have indicated the effective action of TiO2 photocatalysis for delaying the fruit ripening, photocatalytic systems need to be well-designed for this application. Fruit is susceptible to environmental conditions like temperature, relative humidity, atmosphere composition and exposure to UV-light. This fragility associated with its variable ethylene production rate over its maturation stage limits the photocatalysis parameters optimization. Thus, this review aims to detail the reaction mechanisms, set-up, advantages, and limitations of TiO2 photocatalytic systems based on polymers-TiO2 nanocomposites and reactors containing TiO2 immobilized into inorganic supports designed for fruit applications. It is expected that this review can elucidate the fundamental aspects that should be considered for the use of these systems.
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Affiliation(s)
- Jéssica de Matos Fonseca
- Laboratory of Physical Properties of Foods, Chemical and Food Engineering Department, Federal University of Santa Catarina, UFSC, Brazil
| | - Maria Jaízia Dos Santos Alves
- Laboratory of Physical Properties of Foods, Chemical and Food Engineering Department, Federal University of Santa Catarina, UFSC, Brazil
| | - Lenilton Santos Soares
- Laboratory of Physical Properties of Foods, Chemical and Food Engineering Department, Federal University of Santa Catarina, UFSC, Brazil
| | | | - Germán Ayala Valencia
- Laboratory of Physical Properties of Foods, Chemical and Food Engineering Department, Federal University of Santa Catarina, UFSC, Brazil.
| | - Alcilene Rodrigues Monteiro
- Laboratory of Physical Properties of Foods, Chemical and Food Engineering Department, Federal University of Santa Catarina, UFSC, Brazil.
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8
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Nickel and sulfur codoped TiO2 nanoparticles for efficient visible light photocatalytic activity. J Inorg Organomet Polym Mater 2021. [DOI: 10.1007/s10904-021-01914-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
AbstractIn this work, Nickel (Ni) and sulfur (S) codoped TiO2 nanoparticles were prepared by a sol-gel technique. The as-prepared catalyst was characterized using X-ray diffraction (XRD), Fourier transforms infrared spectroscopy (FTIR), FT-Raman spectroscopy, scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectra (DRS) for investigating crystal structure, crystal phase, particle size and bandgap energy of these samples. The photocatalytic performances of all the prepared catalysts have been investigated for the degradation of methylene blue (MB) under visible light irradiation. It was noticed that Ni-S codoped TiO2(Ni-S/TiO2) nanoparticles exhibited much higher photocatalytic activity compared with pure, Ni and S doped TiO2 due to higher visible light absorption and probable decrease in the recombination of photo-generated charges. It was decided that the great visible light absorption was created for codoped TiO2 by the formation of impurity energy states near both the edges of the collection, which works as trapping sites for both the photogenerated charges to decrease the recombination process.
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9
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Gao D, Xu J, Yu H, Liu Y, Yu J. Hydroxyl-enriched highly crystalline TiO2 suspensible photocatalyst: facile synthesis and superior H2-generation activity. Chem Commun (Camb) 2021; 57:2025-2028. [DOI: 10.1039/d0cc08277e] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile ethanol-controlled strategy was reported to simultaneously realize the excellent suspendability and high-crystallinity of a hydroxyl-enriched TiO2 nanocrystal for efficient photocatalytic H2 generation.
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Affiliation(s)
- Duoduo Gao
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Jiachao Xu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Huogen Yu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology
- Wuhan 430070
- P. R. China
| | - Yongping Liu
- Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology
- Guilin 541004
- P. R. China
| | - Jiaguo Yu
- State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology
- Wuhan 430070
- P. R. China
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10
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Chakraborty AK, Ganguli S, Bera S. Enhancing the photocatalytic efficiency of the BiOCl/Bi 3O 4Cl composite modified with WO 3 for environmental purification under visible light. NEW J CHEM 2021. [DOI: 10.1039/d1nj02825a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The role of WO3 in enhancing the photocatalytic behavior of the composite photocatalyst towards the decomposition of organic pollutants in the environment under visible light has been demonstrated.
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Affiliation(s)
- Ashok Kumar Chakraborty
- Department of Applied Chemistry and Chemical Engineering, Islamic University, Kushtia-7003, Bangladesh
| | - Sumon Ganguli
- Biomaterials Research Laboratory (BRL), Department of Applied Chemistry and Chemical Engineering, University of Chittagong, Chittagong-4331, Bangladesh
| | - Sandipan Bera
- Department of Chemistry and Chemical Engineering, Inha University, Incheon 402-751, Republic of Korea
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11
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Biswas A, Saha S, Pal S, Jana NR. TiO 2-Templated BaTiO 3 Nanorod as a Piezocatalyst for Generating Wireless Cellular Stress. ACS APPLIED MATERIALS & INTERFACES 2020; 12:48363-48370. [PMID: 33049141 DOI: 10.1021/acsami.0c14965] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Although the piezoelectric property of a BaTiO3 nanoparticle is routinely used in energy harvesting application, it can also be exploited for wireless cell stimulation and cell therapy. However, such biomedical application is rare due to limited availability of colloidal BaTiO3 nanoparticles of <100 nm hydrodynamic size with good piezocatalytic property and efficient biolabeling performance. Here, we report a colloidal form of a piezocatalytic BaTiO3-based nanorod of <100 nm hydrodynamic size that can offer wireless cell stimulation. The nanorod is prepared using a TiO2 nanorod as the template, and the resultant TiO2-BaTiO3-based composite nanorod is coated with a hydrophilic polymer shell. These nanorods can label cells and, under the ultrasound exposure, produce reactive oxygen species inside cells via piezocatalysis, leading to cell death. These nanorods can be used for wireless modulation of intracellular processes.
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Affiliation(s)
- Aritra Biswas
- School of Materials Science, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata-700032, India
| | - Subhajit Saha
- School of Materials Science, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata-700032, India
| | - Suman Pal
- School of Materials Science, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata-700032, India
| | - Nikhil R Jana
- School of Materials Science, Indian Association for the Cultivation of Science, 2A & 2B Raja S. C. Mullick Road, Kolkata-700032, India
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12
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Preparation of nitrogen-doped aluminium titanate (Al2TiO5) nanostructures: Application to removal of organic pollutants from aqueous media. ADV POWDER TECHNOL 2020. [DOI: 10.1016/j.apt.2020.06.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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13
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Li F, Xiao X, Zhao C, Liu J, Li Q, Guo C, Tian C, Zhang L, Hu J, Jiang B. TiO2-on-C3N4 double-shell microtubes: In-situ fabricated heterostructures toward enhanced photocatalytic hydrogen evolution. J Colloid Interface Sci 2020; 572:22-30. [DOI: 10.1016/j.jcis.2020.03.071] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2020] [Revised: 03/18/2020] [Accepted: 03/19/2020] [Indexed: 12/12/2022]
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14
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He Y, Yan Q, Liu X, Dong M, Yang J. Effect of annealing on the structure, morphology and photocatalytic activity of surface-fluorinated TiO2 with dominant {001} facets. J Photochem Photobiol A Chem 2020. [DOI: 10.1016/j.jphotochem.2020.112400] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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15
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Bai X, Wang S, Yan X, Zhou H, Zhan J, Liu S, Sharma VK, Jiang G, Zhu H, Yan B. Regulation of Cell Uptake and Cytotoxicity by Nanoparticle Core under the Controlled Shape, Size, and Surface Chemistries. ACS NANO 2020; 14:289-302. [PMID: 31869202 DOI: 10.1021/acsnano.9b04407] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Nanoparticle structural parameters, such as size, surface chemistry, and shape, are well-recognized parameters that affect biological activities of nanoparticles. However, whether the core material of a nanoparticle also plays a role remains unknown. To answer this long-standing question, we synthesized and investigated a comprehensive library of 36 nanoparticles with all combinations of three types of core materials (Au, Pt, and Pd), two sizes (6 and 26 nm), and each conjugated with one of six surface ligands of different hydrophobicity. Using this systematic approach, we were able to identify cellular perturbation specifically attributed to core, size, or surface ligand. We discovered that core materials exhibited a comparable regulatory ability as surface ligand on cellular ROS generation and cytotoxicity. Pt nanoparticles were much more hydrophilic and showed much less cell uptake compared to Au and Pd nanoparticles with identical size, shape, and surface ligands. Furthermore, diverse core materials also regulated levels of cellular redox activities, resulting in different cytotoxicity. Specifically, Pd nanoparticles significantly reduced cellular H2O2 and promoted cell survival, while Au nanoparticles with identical size, shape, and surface ligand induced higher cellular oxidative stress and cytotoxicity. Our results demonstrate that nanoparticle core material is as important as other structural parameters in nanoparticle-cell interactions, making it also a necessary consideration when designing nanomedicines.
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Affiliation(s)
- Xue Bai
- Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education , Guangzhou University , Guangzhou 510006 , China
- School of Environmental Science and Engineering , Shandong University , Jinan 250100 , China
| | - Shenqing Wang
- School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , China
| | - Xiliang Yan
- The Rutgers Center for Computational and Integrative Biology , Camden , New Jersey 08102 , United States
| | - Hongyu Zhou
- Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education , Guangzhou University , Guangzhou 510006 , China
| | - Jinhua Zhan
- School of Chemistry and Chemical Engineering , Shandong University , Jinan 250100 , China
| | - Sijin Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science , Chinese Academy of Sciences , Beijing 100085 , China
| | - Virender K Sharma
- Program for the Environment and Sustainability, Department of Environmental and Occupational Health, School of Public Health , Texas A&M University , College Station , Texas 77843 , United States
| | - Guibin Jiang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science , Chinese Academy of Sciences , Beijing 100085 , China
| | - Hao Zhu
- The Rutgers Center for Computational and Integrative Biology , Camden , New Jersey 08102 , United States
| | - Bing Yan
- Institute of Environmental Research at Greater Bay, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education , Guangzhou University , Guangzhou 510006 , China
- School of Environmental Science and Engineering , Shandong University , Jinan 250100 , China
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16
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Bai P, Wu N, Wang Y, Yang T, Li H, Zhang J, Chai Z, Wang X. pH-Controllable regeneration and visible-light photocatalytic redox of carbon and nitrogen co-doped Zn 3Nb 2O 8 towards degradation of multiple contaminants. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00085j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
N/C–Zn3Nb2O8 with a compatible band structure and negative surface demonstrates enhanced visible light photocatalytic activity and stability in degradation of multiple pH-sensitive contaminants.
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Affiliation(s)
- Ping Bai
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials
- School of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Niri Wu
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials
- School of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Yuanjiang Wang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials
- School of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Ting Yang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials
- School of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Hui Li
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials
- School of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Jingyu Zhang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials
- School of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Zhanli Chai
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials
- School of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
| | - Xiaojing Wang
- Inner Mongolia Key Laboratory of Chemistry and Physics of Rare Earth Materials
- School of Chemistry and Chemical Engineering
- Inner Mongolia University
- Hohhot 010021
- People's Republic of China
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17
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Chowdhury M, Sarkar S, Das PK. Photosensitizer Tailored Surface Functionalized Carbon Dots for Visible Light Induced Targeted Cancer Therapy. ACS APPLIED BIO MATERIALS 2019; 2:4953-4965. [PMID: 35021495 DOI: 10.1021/acsabm.9b00689] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Herein, a photosensitizer (riboflavin) tailored surface functionalized carbon dot (RCD1s) was designed to utilize it in visible light induced targeted cancer therapy. At first, phenylboronic acid appended biotinylated blue emitting carbon dot (CD1s) was synthesized. Riboflavin having "diol" moiety was covalently linked with this CD1s to prepare RCD1s by using complementary boronate-diol linkage. Lewis acid-base interaction facilitated the covalent linkage formation between the surface functionalizing agent of CD1s and riboflavin to develop water-soluble, green emitting RCD1s. Interestingly, this newly synthesized RCD1s has the ability to produce reactive oxygen species (ROS) such as hydroxyl and superoxide radicals under exposure of visible light (wavelength: 460-490 nm). These ROS also can destroy the structure of DNA by oxidative pathway. Thus, under irradiation of visible light (wavelength: 460-490 nm), RCD1s was found to kill HeLa and B16F10 melanoma cells over noncancer cell NIH3T3 by ∼5-fold higher efficacy through ROS induced oxidative DNA damage. The presence of biotin on the surface of the riboflavin tethered carbon dot is essential for the selective killing of cancer cells over normal cells. In the presence of UV light (340-420 nm), RCD1s showed no notable killing of cancer cells as well as normal cells. Besides, RCD1s in the presence of visible light selectively stained HeLa and B16F10 cells over noncancerous cell NIH3T3 by exploiting its fluorescence and cancer cell targeting moiety, biotin. Hence, the newly developed RCD1s can be utilized in theranostic applications including bioimaging and selective killing of cancer cells in the presence of visible light (460-490 nm).
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Affiliation(s)
- Monalisa Chowdhury
- School of Biological Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| | - Saheli Sarkar
- School of Biological Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| | - Prasanta Kumar Das
- School of Biological Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
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18
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Gao Y, Shan X, Song D, Gulnigar E, Wang Y, Yang W, Chen Y. One‐step solvothermal synthesis of hollow Bi
2
WO
6
photocatalyst. CAN J CHEM ENG 2019. [DOI: 10.1002/cjce.23509] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yanhua Gao
- Northeast Petroleum University, Daqing, Heilongjiang, 163318 China
| | - Xinyao Shan
- Northeast Petroleum University, Daqing, Heilongjiang, 163318 China
| | - Dongdong Song
- Northeast Petroleum University, Daqing, Heilongjiang, 163318 China
| | - Elham Gulnigar
- Northeast Petroleum University, Daqing, Heilongjiang, 163318 China
| | - Yang Wang
- Northeast Petroleum University, Daqing, Heilongjiang, 163318 China
| | - Wei Yang
- Northeast Petroleum University, Daqing, Heilongjiang, 163318 China
| | - Ying Chen
- Northeast Petroleum University, Daqing, Heilongjiang, 163318 China
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Li W, Zhan X, Song X, Si S, Chen R, Liu J, Wang Z, He J, Xiao X. A Review of Recent Applications of Ion Beam Techniques on Nanomaterial Surface Modification: Design of Nanostructures and Energy Harvesting. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1901820. [PMID: 31166661 DOI: 10.1002/smll.201901820] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 05/13/2019] [Indexed: 05/23/2023]
Abstract
Nanomaterials have gained plenty of research interest because of their excellent performance, which is derived from their small size and special structure. In practical applications, to acquire nanomaterials with high performance, many methods have been used to modulate the structure and components of materials. To date, ion beam techniques have extensively been applied for modulating the performance of various nanomaterials. Energetic ion beams can modulate the surface morphology and chemical components of nanomaterials. In addition, ion beam techniques have also been used to fabricate nanomaterials, including 2D materials, nanoparticles, and nanowires. Compared with conventional methods, ion beam techniques, including ion implantation, ion irradiation, and focused ion beam, are all pure physical processes; these processes do not introduce any impurities into the target materials. In addition, ion beam techniques exhibit high controllability and repeatability. Here, recent progress in ion beam techniques for nanomaterial surface modification is systematically summarized and existing challenges and potential solutions are presented.
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Affiliation(s)
- Wenqing Li
- Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Hubei Nuclear Solid Physics Key Laboratory and Center for Ion Beam Application, Wuhan University, Wuhan, 430072, P. R. China
| | - Xueying Zhan
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Xianyin Song
- Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Hubei Nuclear Solid Physics Key Laboratory and Center for Ion Beam Application, Wuhan University, Wuhan, 430072, P. R. China
| | - Shuyao Si
- Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Hubei Nuclear Solid Physics Key Laboratory and Center for Ion Beam Application, Wuhan University, Wuhan, 430072, P. R. China
| | - Rui Chen
- Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Hubei Nuclear Solid Physics Key Laboratory and Center for Ion Beam Application, Wuhan University, Wuhan, 430072, P. R. China
| | - Jing Liu
- Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Hubei Nuclear Solid Physics Key Laboratory and Center for Ion Beam Application, Wuhan University, Wuhan, 430072, P. R. China
| | - Zhenxing Wang
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Jun He
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing, 100190, P. R. China
| | - Xiangheng Xiao
- Department of Physics and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Hubei Nuclear Solid Physics Key Laboratory and Center for Ion Beam Application, Wuhan University, Wuhan, 430072, P. R. China
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Li C, Rao Y, Zhang B, Huang K, Cao X, Peng D, Wu J, Xiao L, Huang Y. Extraordinary catalysis induced by titanium foil cathode plasma for degradation of water pollutant. CHEMOSPHERE 2019; 214:341-348. [PMID: 30267907 DOI: 10.1016/j.chemosphere.2018.09.138] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Revised: 09/21/2018] [Accepted: 09/22/2018] [Indexed: 06/08/2023]
Abstract
The present paper reports a rapid and cost-effective bifunctional approach to the degradation of organic pollutants in the aqueous solution. This in situ hybrid induced photocatalytic method involves the advanced oxidation process, and photocatalytic process induced by ultraviolet radiated from the plasma discharge to improve the degradation efficiency. This powerful plasma allows the organic molecules to be cleaved either in the plasma zone or on the plasma/solution interface through hydrogen abstraction and electron transfer. Four parallel metal foil electrodes (i.e. Ta, Cu, Ti and Au coated Ti), used as cathodes in the two-electrode system, were evaluated in terms of their degradable performance to organic pollutants. It was found that the degradation rates are dependent on the electrical conduction of metal cathodes. During the discharge process, the Ti-based foil produces TiO2 particles, which then act as catalyst in the electrolyte and perform the photocatalytic process along with the plasma discharge process to degrade organic pollutants. It is of particular interest that gold nanoparticles, generated from Au coated Ti foil film during electrode discharging, are less than 5 nm in size and further enhance the TiO2 photocatalytic activity. In fact, this bifunctional plasma discharge process to the degradation of water pollutant provides an insight into more applications such as chemical conversion, water purification and dust pollution.
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Affiliation(s)
- Chaojiang Li
- College of Science, Hubei University of Technology, Hongshan District, Wuhan, 430068, China; School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore; Department of Materials Science and Engineering, National University of Singapore, 9 Engineering Drive 1, 117576, Singapore
| | - Yuhan Rao
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Bowei Zhang
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
| | - Kang Huang
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Xun Cao
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Dongdong Peng
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Junsheng Wu
- Institute of Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Longqiang Xiao
- Division of Chemistry and Biological Chemistry, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore
| | - Yizhong Huang
- College of Science, Hubei University of Technology, Hongshan District, Wuhan, 430068, China; School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798, Singapore.
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Ahmad YH, Mohamed AT, Sliem MH, Abdullah A, Al-Qaradawi SY. Enhanced photocatalytic performance of WON@porous TiO2 nanofibers towards sunlight-assisted degradation of organic contaminants. RSC Adv 2018; 8:32747-32755. [PMID: 35547673 PMCID: PMC9086300 DOI: 10.1039/c8ra06477f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 09/17/2018] [Indexed: 11/21/2022] Open
Abstract
In the last few decades, TiO2 has been widely used in different types of photocatalytic applications. However, the relatively large optical band gap (∼3.2 eV), low charge carrier mobility and consequently its low quantum efficiency limit its photocatalytic activity. Herein, we construct a novel nanostructured heterojunction of WON/TiO2 nanofibers (NFs) by integration of TiO2 nanofibers synthesized by electrospinning of a polymer solution containing a titanium(iv) butoxide precursor with WON nanoparticles fabricated via annealing of a WO3 precursor in dry ammonia at 700 °C. The synthesized photocatalysts were characterized using different spectroscopic techniques. Their photocatalytic performance towards the degradation of methyl orange, methylene blue, and phenol as model contaminants was investigated and the charge transfer process was elucidated and compared to that of a TiO2/WO3 heterojunction. Coupling of WON with TiO2 nanofibers creates a novel heterojunction with enhanced photocatalytic activity.![]()
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Affiliation(s)
- Yahia H. Ahmad
- Department of Chemistry and Earth Sciences
- College of Arts and Sciences
- Qatar University
- Doha 2713
- Qatar
| | - Assem T. Mohamed
- Department of Chemistry and Earth Sciences
- College of Arts and Sciences
- Qatar University
- Doha 2713
- Qatar
| | | | | | - Siham Y. Al-Qaradawi
- Department of Chemistry and Earth Sciences
- College of Arts and Sciences
- Qatar University
- Doha 2713
- Qatar
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