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Affiliation(s)
- Ayesha Kausar
- Nanosciences Division, National Center for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan
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Gao J, Li T, Song M, Zhao Y, Wang A. Effective dispersion of oxidized multi-walled carbon nanotubes using a water-soluble N, O-carboxymethyl chitosan via non-covalent interaction. RSC Adv 2022; 12:23754-23761. [PMID: 36090392 PMCID: PMC9394589 DOI: 10.1039/d2ra03592h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 08/16/2022] [Indexed: 11/26/2022] Open
Abstract
Dispersible multi-walled carbon nanotubes (MWCNTs) in water have been widely applied in the nanotechnology field. This study reports a water-soluble N,O-carboxymethyl chitosan(N,O-CMCS) assisted individual dispersion of oxidized multi-walled carbon nanotubes (oMWCNTs) as a dispersant. First, the dispersing agent N,O-CMCS was successfully synthesized using the nucleophilic substitution of deacetylated chitosan with chloroacetic acid in an alkaline solution. It was further confirmed using Fourier transform infrared spectroscopy (FTIR). Second, after the treatment with the concentrated hydrochloric acid, the prepared oMWCNTs were dispersed in an aqueous solution of N,O-CMCS under ultrasonic vibrations. Finally, the dispersed aqueous solution was subjected to centrifugation to collect the supernatant of individually dispersed N,O-CMCS/oMWCNTs. In addition, transmission electron microscopy (TEM) further confirmed that the purity of oMWCNTs was improved after the acidification progress. Besides, the stability of the dispersion solution was evidenced by digital photos of oMWCNTs dispersed by N,O-CMCS before and after. Moreover, the UV-vis spectrum (the characteristic peak of dispersed oMWCNTs downshifted 13 nm) showed that the supernatant was enriched by the individual oMWCNTs. In particular, the analytical results of FTIR (the –NH2 band of N,O-CMCS downshifted 7 cm−1), resonance Raman spectroscopy (the ID/IG ratio of dispersed oMWCNTs only increased 0.14), and XRD identified the formation of a non-convalent interaction between N,O-CMCS and oMWCNTs. These findings reveal the dispersing nature of N,O-CMCS towards oMWCNTs in water media. The stability of a dispersion solution was evidenced by images of oMWCNTs-dispersed by N,O-CMCS before (b) and after (a). UV-vis further showed that individual oMWCNTs were enriched via the non-covalent interaction between oMWCNTs and N,O-CMCS.![]()
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Affiliation(s)
- Jinling Gao
- College of Science, Heilongjiang Bayi Agricultural University, Daqing, 163319, China
| | - Tongtong Li
- College of Science, Heilongjiang Bayi Agricultural University, Daqing, 163319, China
| | - Mingzhe Song
- College of Science, Heilongjiang Bayi Agricultural University, Daqing, 163319, China
| | - Yuyao Zhao
- College of Science, Heilongjiang Bayi Agricultural University, Daqing, 163319, China
| | - Anxu Wang
- College of Science, Heilongjiang Bayi Agricultural University, Daqing, 163319, China
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3
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Structural and Morphological Studies of V2O5/MWCNTs and ZrO2/MWCNTs Composites as Photocatalysts. J CHEM-NY 2021. [DOI: 10.1155/2021/9922726] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The present study outlines the synthesis of transition metal oxide- (TMO-) multiwall carbon nanotubes- (MWCNTs-) based composites for photocatalytic application. MWCNTs were functionalized/purified by treating with H2SO4 and HNO3 to improve their dispersion in water. The TMOs (ZrO2, V2O5) were decorated on MWCNTs by the hydrothermal method to yield V2O5/MWCNTs and ZrO2/MWCNTs composites. Subsequently, these composites were characterized for their structural/morphological studies by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM). Photocatalytic activities of TMO/MWCNTs composites were investigated by degradation phenomenon of methylene blue (MB) dye in aqueous solution. It was observed that the prepared composites best performed in the presence of H2O2 under ultraviolet irradiation. The maximum observed degradation efficiencies for ZrO2/MWCNTs and V2O5/MWCNTs were 49% and 96%, respectively.
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Agrawal N, Savalia R, Chatterjee S. Nanostructured zinc oxide film amalgamated with functionalized carbon nanotubes for facile electrochemical determination of nifedipine. Colloids Surf B Biointerfaces 2021; 201:111635. [PMID: 33647712 DOI: 10.1016/j.colsurfb.2021.111635] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 02/02/2021] [Accepted: 02/13/2021] [Indexed: 11/25/2022]
Abstract
An innovative approach has been employed for the detection of nifedipine at glassy carbon electrode fabricated with zinc oxide nanoparticles embedded on functionalized multi walled carbon nanotubes. Herein, square wave voltammetry being an expeditious electrochemical technique has been utilized for the first time for the determination of nifedipine. Instrumental variables were altered to acquire optimized operational parameters. The electrochemical oxidation peak of nifedipine was procured at ∼ 807 mV which was recorded versus Ag/AgCl reference electrode. The oxidation peak was used to quantify the analyte in the dynamic linear range of 1 nM to 40 μM with highest sensitivity and lowest detection limit of 21.8 μA μM-1 and 0.49 nM respectively. The influence of common physiological interferents on the current signal of the analyte was examined. Pronounced stability and reproducibility of fabricated sensor was attained by the neoteric electrochemical approach. The developed protocol was efficaciously applied to quantify nifedipine in pharmaceutical formulations. The urine and blood serum sample of patients being treated for hypertension was effectively detected with nifedipine for the first time. The biological sample assay without the interference of the metabolites coexisting in the samples outlined the insight of selectivity of the developed sensor.
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Affiliation(s)
- Nikita Agrawal
- Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai, 400019, India
| | - Rutesh Savalia
- Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai, 400019, India
| | - Sanghamitra Chatterjee
- Department of Chemistry, Institute of Chemical Technology, Matunga, Mumbai, 400019, India.
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Ali MAM, Alsabagh AM, Sabaa MW, El-Salamony RA, Mohamed RR, Morsi RE. Polyacrylamide hybrid nanocomposites hydrogels for efficient water treatment. IRANIAN POLYMER JOURNAL 2020. [DOI: 10.1007/s13726-020-00810-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Cao Y, Huang HY, Chen LQ, Du HH, Cui JH, Zhang LW, Lee BJ, Cao QR. Enhanced Lysosomal Escape of pH-Responsive Polyethylenimine-Betaine Functionalized Carbon Nanotube for the Codelivery of Survivin Small Interfering RNA and Doxorubicin. ACS APPLIED MATERIALS & INTERFACES 2019; 11:9763-9776. [PMID: 30776886 DOI: 10.1021/acsami.8b20810] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The combination of gene therapy and chemotherapy has recently received considerable attention for cancer treatment. However, low transfection efficiency and poor endosomal escape of genes from nanocarriers strongly limit the success of the clinical use of small interfering RNA (siRNA). In this study, a novel pH-responsive, surface-modified single-walled carbon nanotube (SWCNT) was designed for the codelivery of doxorubicin (DOX) and survivin siRNA. Polyethylenimine (PEI) was covalently conjugated with betaine, and the resulting PEI-betaine (PB) was further synthesized with the oxidized SWCNT to form SWCNT-PB (SPB), which exhibits an excellent pH-responsive lysosomal escape of siRNA. SPB was modified with the targeting and penetrating peptide BR2 (SPBB), thereby achieving considerably higher uptake of siRNA than SWCNT-PEI (SP) or SPB. Furthermore, SPBB-siRNA presented substantially lower survivin expression and higher apoptotic index than Lipofectamine 2000. DOX and survivin siRNA were adsorbed onto SPB to form DOX-SPBB-siRNA, and siRNA/DOX was released into the cytoplasm and nuclei of adenocarcinomic human alveolar basal epithelial (A549) cells without lysosomal retention. Compared with SPBB-siRNA or DOX-SPBB treatment alone, DOX-SPBB-siRNA significantly reduced tumor volume in A549 cell-bearing nude mice, demonstrating the synergistic effects of DOX and survivin siRNA. Pathological analysis also indicated the potential therapeutic effects of DOX-SPBB-siRNA on tumors without distinct damages to normal tissues. In conclusion, the novel functionalized SWCNT loaded with DOX and survivin siRNA was successfully synthesized, and the nanocomplex exhibited effective antitumor effects both in vitro and in vivo, thereby providing an alternative strategy for the codelivery of antitumor drugs and genes.
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Affiliation(s)
- Yue Cao
- Department of Pharmacy , Beijing Health Vocational College , Beijing 100053 , People's Republic of China
| | | | | | | | | | | | - Beom-Jin Lee
- College of Pharmacy , Ajou University , Suwon 16499 , Republic of Korea
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Kumar M, Kumara Swamy B, Reddy S, Zhao W, Chetana S, Gowrav Kumar V. ZnO/functionalized MWCNT and Ag/functionalized MWCNT modified carbon paste electrodes for the determination of dopamine, paracetamol and folic acid. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.01.019] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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A wrapped nano-flame retardant composed of carbon nanotubes and phosphorus-nitrogen containing polymer: synthesis, properties and flame-retardant mechanism. JOURNAL OF POLYMER RESEARCH 2018. [DOI: 10.1007/s10965-018-1599-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Mallakpour S, Behranvand V. Sono-assisted preparation of bio-nanocomposite for removal of Pb 2+ ions: Study of morphology, thermal and wettability properties. ULTRASONICS SONOCHEMISTRY 2017; 39:872-882. [PMID: 28733018 DOI: 10.1016/j.ultsonch.2017.06.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 06/18/2017] [Accepted: 06/19/2017] [Indexed: 06/07/2023]
Abstract
Multi-walled carbon nanotubes (MWCNT) loaded poly(ethylene terephthalate) (PET) composites, with different CNT contents, were fabricated through an ultrasound assisted method as a fast and green way. Then, the obtained composites were fully characterized via FT-IR, UV-Vis, XRD, TGA, FE-SEM and TEM, etc. For this purpose, PET bottle was recycled and applied as matrix of nanocomposites (NC)s. Then, we dispersed the covalent functionalization of MWCNTs with a protein dispersant and obtained a powder of protein-functionalized CNTs. Bio-functionalized MWCNTs showed higher Pb2+ removal efficiency compared to MWCNT-COOH as ascertained via batch equilibrium adsorption experiments. Also, the results indicated the novel NCs presents a high affinity for Pb2+ heavy metal owing to the presence of several good sites. The contact angle results indicated that the addition of MWCNT-BSA increased significantly the contact angle compared to the pure PET. It was concluded that inflame retarding feature of NC was higher than pure polymer.
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Affiliation(s)
- Shadpour Mallakpour
- Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran; Nanotechnology and Advanced Materials Institute, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran.
| | - Vajiheh Behranvand
- Organic Polymer Chemistry Research Laboratory, Department of Chemistry, Isfahan University of Technology, Isfahan 84156-83111, Islamic Republic of Iran
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10
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Li L, Liu H, Wang L, Yue S, Tong X, Zaliznyak T, Taylor GT, Wong SS. Chemical Strategies for Enhancing Activity and Charge Transfer in Ultrathin Pt Nanowires Immobilized onto Nanotube Supports for the Oxygen Reduction Reaction. ACS APPLIED MATERIALS & INTERFACES 2016; 8:34280-34294. [PMID: 27936537 DOI: 10.1021/acsami.6b07870] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Multiwalled carbon nanotubes (MWNTs) represent a promising support medium for electrocatalysts, especially Pt nanoparticles (NPs). The advantages of using MWNTs include their large surface area, high conductivity, as well as long-term stability. Surface functionalization of MWNTs with various terminal groups, such as -COOH, -SH, and -NH2, allows for rational electronic tuning of catalyst-support interactions. However, several issues still need to be addressed for such systems. First, over the course of an electrochemical run, catalyst durability can decrease, due in part to metal NP dissolution, a process facilitated by the inherently high surface defect concentration within the support. Second, the covalent functionalization treatment of MWNTs adopted by most groups tends to lead to a loss of structural integrity of the nanotubes (NTs). To mitigate for all of these issues, we have utilized two different attachment approaches (i.e., covalent versus noncovalent) to functionalize the outer walls of pristine MWNTs and compared the catalytic performance of as-deposited ultrathin (<2 nm) 1D Pt nanowires with that of conventional Pt NPs toward the oxygen reduction reaction (ORR). Our results demonstrated that the electrochemical activity of Pt nanostructures immobilized onto functionalized carbon nanotube (CNT) supports could be dramatically improved by using ultrathin Pt nanowires (instead of NPs) with noncovalently (as opposed to covalently) functionalized CNT supports. Spectroscopic evidence corroborated the definitive presence of charge transfer between the metal catalysts and the underlying NT support, whose direction and magnitude are a direct function of (i) the terminal chemistry as well as (ii) the attachment methodology, both of which simultaneously impact upon the observed electrocatalytic performance. Specifically, the use of a noncovalent π-π stacking method coupled with a -COOH terminal moiety yielded the highest performance results, reported to date, for any similar system consisting of Pt (commercial NPs or otherwise) deposited onto carbon-based supports, a finding of broader interest toward the fabrication of high-performing electrocatalysts in general.
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Affiliation(s)
- Luyao Li
- Department of Chemistry, State University of New York at Stony Brook , Stony Brook, New York 11794-3400, United States
| | - Haiqing Liu
- Department of Chemistry, State University of New York at Stony Brook , Stony Brook, New York 11794-3400, United States
| | - Lei Wang
- Department of Chemistry, State University of New York at Stony Brook , Stony Brook, New York 11794-3400, United States
| | - Shiyu Yue
- Department of Chemistry, State University of New York at Stony Brook , Stony Brook, New York 11794-3400, United States
| | - Xiao Tong
- Center for Functional Nanomaterials, Building 735, Brookhaven National Laboratory , Upton, New York 11973, United States
| | - Tatiana Zaliznyak
- School of Marine and Atmospheric Sciences, State University of New York at Stony Brook , Stony Brook, New York 11794-5000, United States
| | - Gordon T Taylor
- School of Marine and Atmospheric Sciences, State University of New York at Stony Brook , Stony Brook, New York 11794-5000, United States
| | - Stanislaus S Wong
- Department of Chemistry, State University of New York at Stony Brook , Stony Brook, New York 11794-3400, United States
- Condensed Matter Physics and Materials Science Division, Brookhaven National Laboratory , Building 480, Upton, New York 11973, United States
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11
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Xiong W, Gao X, Gui D, Cai X, Tan G, Liu J. Preparation of liquid crystal 4'-allyloxy-biphenyl-4-ol functionalized MWCNTs and their application on improving mechanical and thermal properties of silicon resin. POLYM ENG SCI 2016. [DOI: 10.1002/pen.24344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Weijian Xiong
- College of Chemistry and Environmental Engineering; Shenzhen University; Shenzhen 518060 People's Republic of China
| | - Xue Gao
- College of Chemistry and Environmental Engineering; Shenzhen University; Shenzhen 518060 People's Republic of China
| | - Dayong Gui
- College of Chemistry and Environmental Engineering; Shenzhen University; Shenzhen 518060 People's Republic of China
| | - Xueqing Cai
- College of Chemistry and Environmental Engineering; Shenzhen University; Shenzhen 518060 People's Republic of China
| | - Guiming Tan
- College of Chemistry and Environmental Engineering; Shenzhen University; Shenzhen 518060 People's Republic of China
| | - Jianhong Liu
- College of Chemistry and Environmental Engineering; Shenzhen University; Shenzhen 518060 People's Republic of China
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12
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Ramezanpour M, Leung SSW, Delgado-Magnero KH, Bashe BYM, Thewalt J, Tieleman DP. Computational and experimental approaches for investigating nanoparticle-based drug delivery systems. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:1688-709. [PMID: 26930298 DOI: 10.1016/j.bbamem.2016.02.028] [Citation(s) in RCA: 105] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 02/20/2016] [Accepted: 02/23/2016] [Indexed: 12/21/2022]
Abstract
Most therapeutic agents suffer from poor solubility, rapid clearance from the blood stream, a lack of targeting, and often poor translocation ability across cell membranes. Drug/gene delivery systems (DDSs) are capable of overcoming some of these barriers to enhance delivery of drugs to their right place of action, e.g. inside cancer cells. In this review, we focus on nanoparticles as DDSs. Complementary experimental and computational studies have enhanced our understanding of the mechanism of action of nanocarriers and their underlying interactions with drugs, biomembranes and other biological molecules. We review key biophysical aspects of DDSs and discuss how computer modeling can assist in rational design of DDSs with improved and optimized properties. We summarize commonly used experimental techniques for the study of DDSs. Then we review computational studies for several major categories of nanocarriers, including dendrimers and dendrons, polymer-, peptide-, nucleic acid-, lipid-, and carbon-based DDSs, and gold nanoparticles. This article is part of a Special Issue entitled: Membrane Proteins edited by J.C. Gumbart and Sergei Noskov.
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Affiliation(s)
- M Ramezanpour
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - S S W Leung
- Department of Physics, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - K H Delgado-Magnero
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - B Y M Bashe
- Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - J Thewalt
- Department of Physics, Simon Fraser University, Burnaby, BC V5A 1S6, Canada; Department of Molecular Biology and Biochemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada
| | - D P Tieleman
- Centre for Molecular Simulation, Department of Biological Sciences, University of Calgary, Calgary, AB T2N 1N4, Canada
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Tahmasebi F, Noorbakhsh A. Sensitive Electrochemical Prostate Specific Antigen Aptasensor: Effect of Carboxylic Acid Functionalized Carbon Nanotube and Glutaraldehyde Linker. ELECTROANAL 2016. [DOI: 10.1002/elan.201501014] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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14
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Gui D, Yu S, Xiong W, Cai X, Liu C, Liu J. Liquid crystal functionalization of graphene nanoplatelets for improved thermal and mechanical properties of silicone resin composites. RSC Adv 2016. [DOI: 10.1039/c6ra01858k] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A liquid crystalline molecule, polyurethane-imide (PUI), was used to functionalize graphene nanoplatelets (GNS) via covalent bond and π–π interactions.
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Affiliation(s)
- Dayong Gui
- School of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen 518060
- PR China
| | - Si Yu
- School of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen 518060
- PR China
| | - Weijian Xiong
- School of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen 518060
- PR China
| | - Xueqing Cai
- School of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen 518060
- PR China
| | - Canqun Liu
- School of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen 518060
- PR China
| | - Jianhong Liu
- School of Chemistry and Environmental Engineering
- Shenzhen University
- Shenzhen 518060
- PR China
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