101
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Saeed M, Muneer M, Akram N, ul Haq A, Afzal N, Hamayun M. Synthesis and characterization of silver loaded alumina and evaluation of its photo catalytic activity on photo degradation of methylene blue dye. Chem Eng Res Des 2019. [DOI: 10.1016/j.cherd.2019.06.020] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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102
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Shafi A, Ahmad N, Sultana S, Sabir S, Khan MZ. Ag 2S-Sensitized NiO-ZnO Heterostructures with Enhanced Visible Light Photocatalytic Activity and Acetone Sensing Property. ACS OMEGA 2019; 4:12905-12918. [PMID: 31460417 PMCID: PMC6682037 DOI: 10.1021/acsomega.9b01261] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Accepted: 07/17/2019] [Indexed: 05/06/2023]
Abstract
Visible light-driven Ag2S-grafted NiO-ZnO ternary nanocomposites are synthesized using a facile and cost-effective homogeneous precipitation method. The structural, morphological, and optical properties were extensively studied, confirming the formation of ternary nanocomposites. The surface area of the synthesized nanocomposites was calculated by electrochemical double-layer capacitance (C dl). Ternary Ag2S/NiO-ZnO nanocomposites showed excellent visible light photocatalytic property which increases further with the concentration of Ag2S. The maximum photocatalytic activity was shown by 8% Ag2S/NiO-ZnO with a RhB degradation efficiency of 95%. Hydroxyl and superoxide radicals were found to be dominant species for photodegradation of RhB, confirmed by scavenging experiments. It is noteworthy that the recycling experiments demonstrated high stability and recyclable nature of the photocatalyst. Moreover, the electrochemical results indicated that the prepared nanocomposite exhibits remarkable activity toward detection of acetone. The fabricated nanocomposite sensor showed high sensitivity (4.0764 μA mmol L-1 cm-2) and a lower detection limit (0.06 mmol L-1) for the detection of acetone. The enhanced photocatalytic and the sensing property of Ag2S/NiO-ZnO can be attributed to the synergistic effects of strong visible light absorption, excellent charge separation, and remarkable surface properties.
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Affiliation(s)
- Adil Shafi
- Environmental Research Laboratory,
Department of Chemistry, Aligarh Muslim
University, Aligarh 202002, Uttar Pradesh, India
| | - Nafees Ahmad
- Environmental Research Laboratory,
Department of Chemistry, Aligarh Muslim
University, Aligarh 202002, Uttar Pradesh, India
| | - Saima Sultana
- Environmental Research Laboratory,
Department of Chemistry, Aligarh Muslim
University, Aligarh 202002, Uttar Pradesh, India
| | - Suhail Sabir
- Environmental Research Laboratory,
Department of Chemistry, Aligarh Muslim
University, Aligarh 202002, Uttar Pradesh, India
| | - Mohammad Zain Khan
- Environmental Research Laboratory,
Department of Chemistry, Aligarh Muslim
University, Aligarh 202002, Uttar Pradesh, India
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103
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A green chemistry to produce iron oxide - Chitosan nanocomposite (CS-IONC) for the upgraded bio-restorative and pharmacotherapeutic activities - Supra molecular nanoformulation against drug-resistant pathogens and malignant growth. Int J Biol Macromol 2019; 138:1109-1129. [PMID: 31362021 DOI: 10.1016/j.ijbiomac.2019.07.158] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 07/18/2019] [Accepted: 07/25/2019] [Indexed: 12/19/2022]
Abstract
The logical research on fundamentally adjusted iron oxide nanoparticles has turned out to expanded in biomedicine because of the improved activity and best biocompatibility. In this present work upgraded bio-restorative and pharmacotherapeutic property of chitosan‑iron oxide nanocomposite, which was set up by eco-friendly in situ substance technique. Characterisation of the synthesised nanocomposite by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), x-ray diffraction,(XRD) and Vibrating test magnetometer (VSM) studies reveals that highly stable spherical, electron-dense core shelled rough particles of 50-60 nm. Particle morphology of the synthesised nanocomposite utilising scanning electron microscopy (SEM) uncovers spherical; thick electron centre shelled harsh particles with the size scope of 50-60 nm. FTIR studies show that the specific interaction of practical gatherings of chitosan with iron oxide nanoparticles. Crystalline phase and magnetisation impact of the composite resolved from XRD and VSM studies. Anti-bacterial activity of the nanocomposite examined against human bacterial pathogens which suggest that the readied nanocomposite successfully restrained the development of the tried bacterial strains by recording maximum zone of inhibition, least minimum inhibition concentration (MIC) and biofilm damage against the both tested strains. 100 μg dosages of nanocomposites recorded 20.0 and 21.0 mm of the zone of inhibition against E. coli and S. aureus respectively. Biofilm restraint was additionally observed to be high in nanocomposite treatment by recording lower optical density of ethanol solubilised biofilm of both tested strains. Anticancer activity was examined against the A549 cell line by the assurance of cell feasibility as opposed to oxidative proteins, articulation example of TNF-α, Bax, PARP qualities and apoptosis. Composite prompted 50% of cytotoxicity at 80 μg/mL unmistakably uncovers cytotoxicity against A549 cells. Nanocomposite treatment revealed a high decrease of cell feasibility at all the fixation and most extreme impact seen in 100 μg. Nanocomposite treated cells demonstrated striking changes in cell morphology, the build-up of atomic material related to trademark changes in against oxidative enzymes, quality articulation design which brought about apoptosis-like necrotic cell death. The present findings would propose the conceivable usage of chitosan‑iron oxide nanocomposite as a viable remedial against safe medication pathogens and malignant growth cells.
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104
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Wang C, Ma G, Zhou J, Zhang M, Ma X, Duo F, Chu L, Huang J, Su X. Glycine‐functionalized reduced graphene oxide for methylene blue removal. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Chubei Wang
- Institute of Energy and FuelXinxiang University Xinxiang Henan 453003 China
| | - Guoyang Ma
- Institute of Energy and FuelXinxiang University Xinxiang Henan 453003 China
| | - Jianwei Zhou
- Institute of Energy and FuelXinxiang University Xinxiang Henan 453003 China
| | - Mingliang Zhang
- Institute of Energy and FuelXinxiang University Xinxiang Henan 453003 China
| | - Xinfeng Ma
- Institute of Energy and FuelXinxiang University Xinxiang Henan 453003 China
| | - Fangfang Duo
- Institute of Energy and FuelXinxiang University Xinxiang Henan 453003 China
| | - Liangliang Chu
- Institute of Energy and FuelXinxiang University Xinxiang Henan 453003 China
| | - Jianxin Huang
- Institute of Energy and FuelXinxiang University Xinxiang Henan 453003 China
| | - Xinmei Su
- Institute of Energy and FuelXinxiang University Xinxiang Henan 453003 China
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105
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El-Naggar NEA, Hamouda RA, Rabei NH, Mousa IE, Abdel-Hamid MS. Phycoremediation of lithium ions from aqueous solutions using free and immobilized freshwater green alga Oocystis solitaria: mathematical modeling for bioprocess optimization. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:19335-19351. [PMID: 31073833 DOI: 10.1007/s11356-019-05214-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 04/16/2019] [Indexed: 06/09/2023]
Abstract
Lithium is registered as a serious pollutant that causes environmental damage to an irrigation water supply. Freshwater green alga (Oocystis solitaria) was studied for its potential to remove lithium ions from aqueous solutions. The Plackett-Burman design was applied for initial screening of six factors for their significances for the removal of lithium from aqueous solutions using Oocystis solitaria cells. Among the variables screened, pH, lithium concentration, and temperature were the most significant factors affecting lithium removal. Hence, the levels of these significant variables were further investigated for their interaction effects on lithium removal using the Box-Behnken statistical design. The optimum conditions for maximum lithium removal from aqueous solutions by Oocystis solitaria were the initial lithium concentration of 200 mg/L, contact time of 60 min, temperature of 30 °C, pH 5, and biomass of Oocystis solitaria cells of 1 g/L with agitation condition. Under the optimized conditions, the percentage of maximum lithium removal was 99.95% which is larger than the percentage of lithium removal recorded before applying the Plackett-Burman design (40.07%) by 2.49 times. The different properties of Oocystis solitaria, as an adsorbent, were explored with SEM and via FTIR analysis. The spectrum of FTIR analysis for samples of Oocystis solitaria cells before lithium biosorption showed different absorption peaks at 3394 cm-1, 2068 cm-1, 1638 cm-1, 1398 cm-1, 1071 cm-1, and 649 cm-1 which has been shifted to 3446 cm-1, 2924 cm-1, 1638 cm-1, 1384 cm-1, 1032 cm-1, and 613 cm-1, respectively, after lithium biosorption by the alga. The treatment of aqueous solution containing lithium with Oocystis solitaria cells immobilized in alginate beads removed 98.71% of lithium at an initial concentration of 200 mg/L after 5 h. Therefore, Oocystis solitaria may be considered as an alternative for sorption and removal of lithium ions from wastewaters.
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Affiliation(s)
- Noura El-Ahmady El-Naggar
- Department of Bioprocess Development, Genetic Engineering and Biotechnology Research Institute, City of Scientific Research and Technological Applications, New Borg El-Arab City, Alexandria, 21934, Egypt.
| | - Ragaa A Hamouda
- Department of Biology, Faculty of Sciences and Arts - Khulais, University of Jeddah, Jeddah, Saudi Arabia
- Department of Microbial Biotechnology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, Menoufyia Governorate, 22857, Egypt
| | - Nashwa H Rabei
- Department of Microbial Biotechnology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, Menoufyia Governorate, 22857, Egypt
| | - Ibrahim E Mousa
- Department of Environmental Biotechnology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, Menoufyia Governorate, 22857, Egypt
| | - Marwa Salah Abdel-Hamid
- Department of Microbial Biotechnology, Genetic Engineering and Biotechnology Research Institute, University of Sadat City, Menoufyia Governorate, 22857, Egypt
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106
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Sirajudheen P, Meenakshi S. Facile synthesis of chitosan-La3+-graphite composite and its influence in photocatalytic degradation of methylene blue. Int J Biol Macromol 2019; 133:253-261. [DOI: 10.1016/j.ijbiomac.2019.04.073] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 03/28/2019] [Accepted: 04/11/2019] [Indexed: 10/27/2022]
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107
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Chojnacka K, Mikulewicz M. Green analytical methods of metals determination in biosorption studies. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.02.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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108
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Facile Synthesis of Mordenite Nanoparticles for Efficient Removal of Pb(II) Ions from Aqueous Media. J Inorg Organomet Polym Mater 2019. [DOI: 10.1007/s10904-019-01238-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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109
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Ahmadi S, Igwegbe CA, Rahdar S. The application of thermally activated persulfate for degradation of Acid Blue 92 in aqueous solution. INTERNATIONAL JOURNAL OF INDUSTRIAL CHEMISTRY 2019. [DOI: 10.1007/s40090-019-0188-1] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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110
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Alipanahpour Dil E, Ghaedi M, Asfaram A, Mehrabi F, Sadeghfar F. Efficient adsorption of Azure B onto CNTs/Zn:ZnO@Ni2P-NCs from aqueous solution in the presence of ultrasound wave based on multivariate optimization. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2018.12.050] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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111
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Azari A, Noorisepehr M, Dehghanifard E, Karimyan K, Hashemi SY, Kalhori EM, Norouzi R, Agarwal S, Gupta VK. Experimental design, modeling and mechanism of cationic dyes biosorption on to magnetic chitosan-lutaraldehyde composite. Int J Biol Macromol 2019; 131:633-645. [DOI: 10.1016/j.ijbiomac.2019.03.058] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 03/01/2019] [Accepted: 03/07/2019] [Indexed: 12/28/2022]
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112
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Nagaraju G, Karthik K, Shashank M. Ultrasound-assisted Ta2O5 nanoparticles and their photocatalytic and biological applications. Microchem J 2019. [DOI: 10.1016/j.microc.2019.03.094] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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113
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Chen CR, Zeng HY, Yi MY, Xiao GF, Zhu RL, Cao XJ, Shen SG, Peng JW. Fabrication of Ag 2O/Ag decorated ZnAl-layered double hydroxide with enhanced visible light photocatalytic activity for tetracycline degradation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 172:423-431. [PMID: 30735974 DOI: 10.1016/j.ecoenv.2019.01.080] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 01/17/2019] [Accepted: 01/19/2019] [Indexed: 06/09/2023]
Abstract
The photocatalytic performance of layered double hydroxides (LDH) is usually confined to the slow interface mobility and high recombination rate of photogenerated electron-hole pairs in material. To overcome the low photocatalytic efficiency, novel Ag2O/Ag decorated LDH (LDH-Ag2O/Ag) was successfully synthesized by depositing Ag2O on the surface of LDH and then converted to Ag° nanoparticles in the right position after heat treatment. The as-synthesized LDH-Ag2O/Ag composites were characterized by Powder X-ray diffraction (XRD), Scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-visible diffuse reflectance spectra (UV-vis DRS), photoluminescence spectra (PL) and transient photocurrent (TPC) analysis. Compared with virgin LDH, the photocatalytic activities of LDH-Ag2O/Ag composites were enhanced significantly. The optimum photocatalytic efficiency of LDH-Ag10 (0.0184 min-1) was nearly 46 times higher than that of virgin LDH (0.0004 min-1). The result of active species trapping experiments indicated that •OH, h+, and •O2- have an effect on the TC degradation, where •OH played the predominant role during the photocatalytic process. The possible photocatalytic mechanisms involving the charge transfer pathway and reactive species generation during the process of TC degradation were also discussed. The improved photocatalytic activity of LDH-Ag2O/Ag could be attributed to the synergetic effect between LDH and Ag2O/Ag that extended visible light range and reduced photogenerated charge carriers recombination.
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Affiliation(s)
- Chao-Rong Chen
- College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Hong-Yan Zeng
- College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China.
| | - Mo-Yu Yi
- College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Gao-Fei Xiao
- College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Run-Liang Zhu
- Key Laboratory of Mineralogy and Metallogeny, Guangdong Provincial Key Laboratory of Mineral Physics and Material Research & Development, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Xiao-Jv Cao
- College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Shi-Gen Shen
- College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
| | - Jia-Wen Peng
- College of Chemical Engineering, Xiangtan University, Xiangtan, Hunan, 411105, China
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114
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Heydari M, Ghoreishi SM, Khoobi A. Response Surface Modeling of Electrochemical Data for Sensitive Determination of Sudan III in Food Products at the Surface of a Nanocomposite Modified Electrode. FOOD ANAL METHOD 2019. [DOI: 10.1007/s12161-019-01528-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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115
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Synthesis of hydrazine-grafted guar gum material for the highly effective removal of organic dyes. Carbohydr Polym 2019; 211:308-314. [DOI: 10.1016/j.carbpol.2019.01.112] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 01/29/2019] [Accepted: 01/31/2019] [Indexed: 01/09/2023]
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116
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Sabarinathan C, Karuppasamy P, Vijayakumar C, Arumuganathan T. Development of methylene blue removal methodology by adsorption using molecular polyoxometalate: Kinetics, Thermodynamics and Mechanistic Study. Microchem J 2019. [DOI: 10.1016/j.microc.2019.01.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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117
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Ashraf S, Siddiqa A, Shahida S, Qaisar S. Titanium-based nanocomposite materials for arsenic removal from water: A review. Heliyon 2019; 5:e01577. [PMID: 31193228 PMCID: PMC6522689 DOI: 10.1016/j.heliyon.2019.e01577] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 04/16/2019] [Accepted: 04/19/2019] [Indexed: 11/20/2022] Open
Abstract
Arsenic is highly carcinogenic element and less concentration of this chemical element makes natural water unsafe for human consumption. Versatile techniques including adsorption method have been established to remove the arsenic from water. However, adsorption is found to be one of effective method for the remediation of arsenic from contaminated water. Different types of natural adsorbents i.e. clays, waste materials, carbon based material have been studied widely for the adsorption of arsenic. Recently, nanotechnology is considered to be one of the best technology for waste water treatment. Therefore researchers have synthesized several types of nanoadsorbents and investigated them for the removal of various pollutants including arsenic from water. Now days, attention is paid on development of nanocomposite materials which are proven as competent arsenic adsorbent candidate as compared to other adsorbents due to dominant structural and surface features. Various metal/metal oxide based nanocomposites have been developed and studied for arsenic removal from aqueous media. It has been reported that TiO2 based nanocomposite exhibit stong affinity for both inorganic form of arsenic. Therefore, in this review numerous metal or metal oxide based titania nanocomposites i.e. TiO2-αFe2O3, NHITO, Ce-Ti oxide, Zr-TiO2, RGO-MFT etc. have been discussed in details for the water treatment containing arsenic. This review also presents an overview of low cost adsorbents, titania based nanoadsorbent and hybrid titania nanostructures for the removal of arsenic. In this review paper the particle size, surface area and adsorption efficiency of these titania based materials at different pH are also been presented in tabulated form. It provides the opportunity to choose best titania based nanocomposites for the treatment of arsenic polluted water.
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Affiliation(s)
- Sobia Ashraf
- Department of Chemistry, University of Poonch Rawalakot, Azad Kashmir, Pakistan
| | - Asima Siddiqa
- NanoScience and Technology Department, National Centre for Physics, Islamabad, Pakistan
| | - Shabnam Shahida
- Department of Chemistry, University of Poonch Rawalakot, Azad Kashmir, Pakistan
| | - Sara Qaisar
- NanoScience and Technology Department, National Centre for Physics, Islamabad, Pakistan
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118
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Dehghani MH, Sarmadi M, Alipour MR, Sanaei D, Abdolmaleki H, Agarwal S, Gupta VK. Investigating the equilibrium and adsorption kinetics for the removal of Ni (II) ions from aqueous solutions using adsorbents prepared from the modified waste newspapers: A low-cost and available adsorbent. Microchem J 2019. [DOI: 10.1016/j.microc.2019.02.042] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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119
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Preparation, and structural of new NiS-SiO2 and Cr2S3-TiO2 nano-catalyst: Photocatalytic and antimicrobial studies. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2019; 194:128-134. [DOI: 10.1016/j.jphotobiol.2019.03.016] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 03/18/2019] [Accepted: 03/25/2019] [Indexed: 11/22/2022]
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120
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Abdel Bary EM, Harmal AN. A novel method to prepare microporous and nanofibrous hydrogel scaffolds as neural tissue engineering. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2019. [DOI: 10.1080/10601325.2019.1593792] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- E. M. Abdel Bary
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, Egypt
| | - Ammar N. Harmal
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, Egypt
- Department of Chemistry, Faculty of Science, Sa'adah University, Sa'adah, Yemen
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121
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Abdel Hameed RM. Nickel Oxide Nanoparticles Supported on Graphitized Carbon for Ethanol Oxidation in NaOH Solution. J CLUST SCI 2019. [DOI: 10.1007/s10876-019-01560-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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122
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Rana S, Varadwaj GBB, Jonnalagadda SB. Ni nanoparticle supported reduced graphene oxide as a highly active and durable heterogeneous material for coupling reactions. NANOSCALE ADVANCES 2019; 1:1527-1530. [PMID: 36132608 PMCID: PMC9418947 DOI: 10.1039/c8na00245b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Accepted: 01/28/2019] [Indexed: 06/15/2023]
Abstract
We report the loading of highly air stable Ni(0) nanoparticles (average particle size = 11 nm) on the surface of a reduced graphene oxide (RGO) material. The material was characterized using different techniques, including Raman spectroscopy, XRD, TEM, SEM, and HRTEM analysis. The Ni(0)@RGO catalyst showed superb efficiency towards Kumada-Corriu C-C cross-coupling reactions, with 92% yield of 4-methoxybiphenyl at 60 °C. The recycled material can be reused up to the 5th cycle after regeneration by calcination, without loss of activity.
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Affiliation(s)
- Surjyakanta Rana
- School of Chemistry & Physics, College of Agriculture, Engineering & Science, University of KwaZulu-Natal Durban South Africa +27 31 260 3091 +27 31 260 7325 ext. 3090
| | - G Bishwa Bidita Varadwaj
- School of Chemistry & Physics, College of Agriculture, Engineering & Science, University of KwaZulu-Natal Durban South Africa +27 31 260 3091 +27 31 260 7325 ext. 3090
| | - S B Jonnalagadda
- School of Chemistry & Physics, College of Agriculture, Engineering & Science, University of KwaZulu-Natal Durban South Africa +27 31 260 3091 +27 31 260 7325 ext. 3090
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123
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Zhou X, Zhou S, Ma F, Xu Y. Synergistic effects and kinetics of rGO-modified TiO 2 nanocomposite on adsorption and photocatalytic degradation of humic acid. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 235:293-302. [PMID: 30690325 DOI: 10.1016/j.jenvman.2019.01.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 12/30/2018] [Accepted: 01/08/2019] [Indexed: 06/09/2023]
Abstract
Graphene oxide was prepared using the modified Hummers method and reduced graphene oxide (rGO) - titanium dioxide (TiO2) nanocomposite was synthesised using the one-step hydrothermal treatment. The synergistic effects on adsorption and photocatalytic properties of the rGO-TiO2 nanocomposite for the humic acid removal were systematically investigated. The results of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Raman and infrared (IR) spectroscopy indicate that GO was partially reduced to reduced graphene oxide (rGO) in the hydrothermal synthesis process and anatase TiO2 nanoparticles uniformly grew on the surface of rGO. The photoelectron and photohole generated under visible light irradiation were effectively separated on the surface of rGO-TiO2. The rGO-TiO2 nanocomposite exhibited higher photocatalytic activity as a result of the synergistic effects of surface functional groups for adsorption and the excellent conductivity for photocatalytic reaction. The effect of rGO-TiO2 nanocomposite dosage, light intensity and system temperature on the removal of humic acid solution was investigated. The results show that the removal efficiency of humic acid increased with system temperature and light intensity. When the dosage of rGO-TiO2 nanocomposite was 1.2 g/L, the temperature, the light intensity and the pH of this system was 303 K, 4.37 Wm-2 and 7, respectively, the removal efficiency of humic acid reached 88.7% under visible light irradiation.
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Affiliation(s)
- Xiao Zhou
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China; Analysis and Test Center, Guangdong University of Technology, Guangzhou, 510006, PR China; Guizhou Academy of Sciences, Shanxi Road No. 1, Guiyang, 550001, PR China
| | - Shaoqi Zhou
- Guizhou Academy of Sciences, Shanxi Road No. 1, Guiyang, 550001, PR China; College of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, 510006, PR China; State Key Laboratory of Subtropical Building Sciences, South China University of Technology, Guangzhou, 510641, PR China; Key Laboratory of Environmental Protection and Eco-remediation of Guangdong Regular Higher Education Institutions, South China University of Technology, Guangzhou Higher Education Mega Center, 510006, PR China.
| | - Fuzhen Ma
- College of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Center, 510006, PR China
| | - Yanbin Xu
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, PR China; Analysis and Test Center, Guangdong University of Technology, Guangzhou, 510006, PR China
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124
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Algal extracts based biogenic synthesis of reduced graphene oxides (rGO) with enhanced heavy metals adsorption capability. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2018.12.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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125
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Safaei M, Taran M, Imani MM. Preparation, structural characterization, thermal properties and antifungal activity of alginate-CuO bionanocomposite. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 101:323-329. [PMID: 31029325 DOI: 10.1016/j.msec.2019.03.108] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2018] [Revised: 02/12/2019] [Accepted: 03/28/2019] [Indexed: 12/23/2022]
Abstract
In this study, the antifungal activity rate of alginate-CuO bionanocomposite was assessed against Aspergillus niger using colony forming units (CFU) and disc diffusion methods. Employing the Taguchi method, nine experiments were designed for the synthesis of alginate-CuO nanocomposite with the highest antifungal activity. The nanocomposite synthesized under the conditions of experiment 5 (4 mg/mL CuO nanoparticles and 1 mg/mL alginate biopolymer with stirring time of 90 min) showed the greatest inhibition rate on fungal growth (83.17%). In the optimum conditions for the synthesis of alginate-CuO nanocomposite with the highest antifungal activity the second level of CuO NPs (14.14%), alginate biopolymer (8.16%) and stirring time (5.63%) showed the best improvement performance on inhibiting the fungal growth. The results of ultraviolet-visible spectroscopy (UV-vis), transmission electron microscopy (TEM) and X-ray powder diffraction (XRD) confirmed the formation of alginate-CuO nanocomposite. Thermogravimetric analysis (TGA) and differential thermal analysis (DTA) indicated that the thermal stability of alginate biopolymer and CuO nanoparticles were improved by the formation of the nanocomposite. Due to the favorable properties of alginate-CuO nanocomposite, its antifungal feature can be used in various biomedical fields.
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Affiliation(s)
- Mohsen Safaei
- Oral and Dental Sciences Research Laboratory, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran.
| | - Mojtaba Taran
- Department of Nanobiotechnology, Faculty of Science, Razi University, Kermanshah, Iran
| | - Mohammad Moslem Imani
- Department of Orthodontics, School of Dentistry, Kermanshah University of Medical Sciences, Kermanshah, Iran
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126
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Kashefi S, Borghei SM, Mahmoodi NM. Superparamagnetic enzyme-graphene oxide magnetic nanocomposite as an environmentally friendly biocatalyst: Synthesis and biodegradation of dye using response surface methodology. Microchem J 2019. [DOI: 10.1016/j.microc.2018.11.023] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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127
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Ghaedi AM, Karamipour S, Vafaei A, Baneshi MM, Kiarostami V. Optimization and modeling of simultaneous ultrasound-assisted adsorption of ternary dyes using copper oxide nanoparticles immobilized on activated carbon using response surface methodology and artificial neural network. ULTRASONICS SONOCHEMISTRY 2019; 51:264-280. [PMID: 30322764 DOI: 10.1016/j.ultsonch.2018.10.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Revised: 10/03/2018] [Accepted: 10/05/2018] [Indexed: 06/08/2023]
Abstract
The present study examines simultaneous adsorption of ternary dyes such as rose bengal (RB), safranin O (SO) and malachite green (MG) from aqueous media on copper oxide nanoparticles immobilized on activated carbon (CuO-NPs-AC) in a batch system. To forecast and optimize the adsorption, artificial neural network (ANN) and response surface methodology (RSM) were utilized. The effect of various factors, e.g. dye concentration, sonication time, adsorbent dosage and pH on the adsorption process were evaluated through five level six factor central composite design (CCD) using RSM. Maximum removal efficiency of MG, SO and RB dyes were seen 94.26%, 71% and 76% under optimal operating conditions. The suggested quadratic models revealed good fit with the actual data. To testing the data, the coefficients of determination (R2) of 0.9976, 0.9971 and 0.9952 and Fisher F-values of 2048.92, 1660.95 and 926.84 were obtained for MG, SO and RB dyes, respectively. The same data were utilized to construct the ANN models. The results revealed that both models yielded high R2 values, while the RSM models were slightly more accurate in predictions as compared to ANN models for MG, SO and RB dyes removal. The equilibrium data followed the Langmuir isotherm model, although the rate of the adsorption process well fitted to pseudo-second-order kinetics. The maximum adsorption capacity of the CuO-NPs-AC for MG, SO and RB were found to be 212.79, 149.25 and 172.42 mg/g, respectively.
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Affiliation(s)
- Abdol Mohammad Ghaedi
- Department of Chemistry, Gachsaran Branch, Islamic Azad University, P.O. Box 75818-63876, Gachsaran, Iran.
| | - Shahnaz Karamipour
- Department of Chemistry, Gachsaran Branch, Islamic Azad University, P.O. Box 75818-63876, Gachsaran, Iran
| | - Azam Vafaei
- Department of Chemistry, Gachsaran Branch, Islamic Azad University, P.O. Box 75818-63876, Gachsaran, Iran
| | - Mohammad Mehdi Baneshi
- Social Determinants of Health Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Vahid Kiarostami
- Department of Chemistry, Islamic Azad University, North Tehran Branch, Tehran, Iran
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128
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Abdelrahman EA, Hegazey R. Utilization of waste aluminum cans in the fabrication of hydroxysodalite nanoparticles and their chitosan biopolymer composites for the removal of Ni(II) and Pb(II) ions from aqueous solutions: Kinetic, equilibrium, and reusability studies. Microchem J 2019. [DOI: 10.1016/j.microc.2018.10.016] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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129
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Ren Q, Yin C, Chen Z, Cheng M, Ren Y, Xie X, Li Y, Zhao X, Xu L, Yang H, Li W. Efficient sonoelectrochemical decomposition of chlorpyrifos in aqueous solution. Microchem J 2019. [DOI: 10.1016/j.microc.2018.10.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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130
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Montmorillonite/graphene oxide nanocomposite as superior adsorbent for the adsorption of Rhodamine B and Nickel ion in binary system. ADV POWDER TECHNOL 2019. [DOI: 10.1016/j.apt.2018.12.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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131
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Kaur K, Jindal R. Comparative study on the behaviour of Chitosan-Gelatin based Hydrogel and nanocomposite ion exchanger synthesized under microwave conditions towards photocatalytic removal of cationic dyes. Carbohydr Polym 2019; 207:398-410. [DOI: 10.1016/j.carbpol.2018.12.002] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/27/2018] [Accepted: 12/02/2018] [Indexed: 11/26/2022]
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132
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Shadmehr J, Zeinali S, Tohidi M. Synthesis of a chromium terephthalate metal organic framework and use as nanoporous adsorbent for removal of diazinon organophosphorus insecticide from aqueous media. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2018.1516149] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Jafar Shadmehr
- Department of Nanochemical Engineering, Faculty of Advanced Technologies, Shiraz University, Shiraz, Iran
| | - Sedigheh Zeinali
- Department of Nanochemical Engineering, Faculty of Advanced Technologies, Shiraz University, Shiraz, Iran
| | - Maryam Tohidi
- Department of Nanochemical Engineering, Faculty of Advanced Technologies, Shiraz University, Shiraz, Iran
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133
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Xue JH, Zhang H, Ding DX, Hu N, Wang YD, Wang YS. Linear β-Cyclodextrin Polymer Functionalized Multiwalled Carbon Nanotubes as Nanoadsorbent for Highly Effective Removal of U(VI) from Aqueous Solution Based on Inner-Sphere Surface Complexation. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b05453] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jin-Hua Xue
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, PR China
- College of Public Health, University of South China, Hengyang, Hunan 421001, PR China
| | - Hui Zhang
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, PR China
| | - D. X. Ding
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, PR China
| | - Nan Hu
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, PR China
| | - Yong-Dong Wang
- Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang, Hunan 421001, PR China
| | - Yong-Sheng Wang
- College of Public Health, University of South China, Hengyang, Hunan 421001, PR China
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134
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High Sensitive Immunoelectrochemical Measurement of Lung Cancer Tumor Marker ProGRP Based on TiO₂-Au Nanocomposite. Molecules 2019; 24:molecules24040656. [PMID: 30781735 PMCID: PMC6412370 DOI: 10.3390/molecules24040656] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 01/31/2019] [Accepted: 02/06/2019] [Indexed: 12/27/2022] Open
Abstract
Progastrin-releasing peptide (ProGRP), which is known to be highly specific and sensitive to small cell lung cancer (SCLC), has been proven to be a valuable substitute for neuron-specific enolase in SCLC diagnostics and monitoring, especially in its early stages. The detection of ProGRP levels also facilitates a selection of therapeutic treatments. For the fabrication of our proposed biosensor, titanium (IV) oxide microparticles were first used, followed by dispersing gold nanoparticles into chitosan and immobilizing them onto a carbon paste electrode (CPE) surface. The developed immunosensor exhibits a much higher biosensing performance in comparison with current methods, when it comes to the detection of ProGRP. Therefore, the proposed CPE/TiO2/(CS+AuNPs)/anti-ProGRP/BSA/ProGRP is excellent for the development of a compact diagnostics apparatus.
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135
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Hassan MR, Aly MI. Adsorptive removal of cesium ions from aqueous solutions using synthesized Prussian blue/magnetic cobalt ferrite nanoparticles. PARTICULATE SCIENCE AND TECHNOLOGY 2019. [DOI: 10.1080/02726351.2018.1539799] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | - Mohamed I. Aly
- Hot Laboratories and Waste Management Center, Atomic Energy Authority, P.O. 13759, Inshas, Egypt
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136
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Zhu JM, Hosseini M, Fakhri A, Rad SS, Hadadi T, Nobakht N. Highly efficient of molybdenum trioxide-cadmium titanate nanocomposites for ultraviolet light photocatalytic and antimicrobial application: Influence of reactive oxygen species. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2019; 191:75-82. [DOI: 10.1016/j.jphotobiol.2018.12.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 12/18/2018] [Accepted: 12/20/2018] [Indexed: 10/27/2022]
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137
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Guo X, Zhu Y, Han W, Fan X, Li Y, Zhang F, Zhang G, Peng W, Wang S. Nitrogen-doped graphene quantum dots decorated graphite foam as ultra-high active free-standing electrode for electrochemical hydrogen evolution and phenol degradation. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2018.04.072] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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138
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Algal biochar reinforced trimetallic nanocomposite as adsorptional/photocatalyst for remediation of malachite green from aqueous medium. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.11.070] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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139
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Efficient fluoride removal by preparation, characterization of pyrolysis bone: Mixed level design experiment and Taguchi L8 orthogonal array optimization. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.10.137] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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140
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Sasireka A, Rajendran R, Priya P, Raj V. Ciprofloxacin-Loaded Ceramic/Polymer Composite Coatings on Ti with Improved Antibacterial and Corrosion Resistance Properties for Orthopedic Applications. ChemistrySelect 2019. [DOI: 10.1002/slct.201803769] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Asokan Sasireka
- Advanced Materials Research Laboratory, Department of Chemistry; Periyar University; Salem - 636 011, Tamil Nadu India
| | - Renji Rajendran
- Advanced Materials Research Laboratory, Department of Chemistry; Periyar University; Salem - 636 011, Tamil Nadu India
| | - Palanisamy Priya
- Advanced Materials Research Laboratory, Department of Chemistry; Periyar University; Salem - 636 011, Tamil Nadu India
| | - Vairamuthu Raj
- Advanced Materials Research Laboratory, Department of Chemistry; Periyar University; Salem - 636 011, Tamil Nadu India
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141
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Phenol adsorption on scoria stone as adsorbent - Application of response surface method and artificial neural networks. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.11.006] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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142
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Green synthesis of silver nanoparticles, its characterization, and chaperone-like activity in the aggregation inhibition of α-chymotrypsinogen A. Int J Biol Macromol 2018; 120:2381-2389. [DOI: 10.1016/j.ijbiomac.2018.09.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Revised: 08/25/2018] [Accepted: 09/03/2018] [Indexed: 02/01/2023]
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143
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Tan CHC, Sabar S, Hussin MH. Development of immobilized microcrystalline cellulose as an effective adsorbent for methylene blue dye removal. SOUTH AFRICAN JOURNAL OF CHEMICAL ENGINEERING 2018. [DOI: 10.1016/j.sajce.2018.08.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022] Open
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144
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Xu Y, Guo Y, Duan S, Wei H, Liu Y, Wang L, Huo X, Yang Y. Effects of ultrasound irradiation on the characterization and bioactivities of the polysaccharide from blackcurrant fruits. ULTRASONICS SONOCHEMISTRY 2018; 49:206-214. [PMID: 30181026 DOI: 10.1016/j.ultsonch.2018.08.005] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 08/09/2018] [Accepted: 08/09/2018] [Indexed: 06/08/2023]
Abstract
In this study, the influence of ultrasound irradiation on the characterization and bioactivities of the polysaccharide from blackcurrant fruits (BCP, molecular weight: Mw = 3.26 × 104 kDa) was investigated. Two degraded polysaccharides (U-400, Mw = 1.89 × 104 kDa, and U-600, Mw = 1.32 × 104 kDa) were obtained by different ultrasound powers of 400 W and 600 W, respectively. Compared with BCP, U-400 and U-600 showed 63.52% and 68.85% reductions in the particle size (Zavg), respectively; moreover, the dynamic viscosity of BCP was reduced by 27.88%, and 33.63%, separately. The reducing sugar content and thermal stability increased with the increase of ultrasound intensity. The degraded polysaccharides contained the same monosaccharide species as those of BCP but at different molar ratios. Fourier transform infrared (FT-IR) and nuclear magnetic resonance (NMR) spectroscopic analysis confirmed that the degraded polysaccharides and BCP exhibited the similar structural features, which were mainly composed of six glycosidic bonds. A reduction in surface area of the flake-like structure was observed in the degraded polysaccharides compared to that of BCP, and they had no triple helix structure. Furthermore, the precise structural characteristics of U-600 were identified by 2D NMR analysis. The results of the bioactivity assays indicated that the ultrasound irradiation could evidently enhance the antioxidant (hydroxyl and superoxide radicals scavenging, lipid peroxidation inhibition, and DNA damage protection activities), α-amylase and α-glucosidase inhibition activities of BCP. These activities increased in the order of U-600 > U-400 > BCP. In particular, the DNA protection and α-amylase inhibition activities for U-600 were 52.19 ± 1.34% and 75.98 ± 0.77%, respectively, which were 2 times higher than those of BCP. U-600 prepared with the higher-intensity ultrasound exhibited the best physicochemical properties and bioactivities among the three polysaccharides. These results suggested that ultrasound irradiation was an efficient, green method to produce value-added polysaccharide for use in functional food or medicine.
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Affiliation(s)
- Yaqin Xu
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Yingying Guo
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Suyang Duan
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Hong Wei
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Yusong Liu
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Libo Wang
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Xin Huo
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China
| | - Yu Yang
- College of Science, Northeast Agricultural University, Harbin 150030, People's Republic of China.
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145
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Yadav M, Ahmad S, Chiu FC. Graphene oxide dispersed polyvinyl chloride/alkyd green nanocomposite film: Processing and physico-mechanical properties. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.07.051] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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146
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Maleki A, Firouzi-Haji R. L-Proline functionalized magnetic nanoparticles: A novel magnetically reusable nanocatalyst for one-pot synthesis of 2,4,6-triarylpyridines. Sci Rep 2018; 8:17303. [PMID: 30470821 PMCID: PMC6251865 DOI: 10.1038/s41598-018-35676-x] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 11/09/2018] [Indexed: 12/03/2022] Open
Abstract
In this work, an efficient method for the immobilization of L-proline on magnetic nanoparticles was offered and evaluated as a recoverable magnetic nanocatalyst for synthesis of 2,4,6-triarylpyridines through one-pot three-component reaction of acetophenone, aryl aldehydes and ammonium acetate. This article is the first report of the catalytic application of L-proline functionalized magnetic nanoparticles in organic reactions as a magnetic nanocatalyst. This novel magnetic nanocatalyst proved to be effective and provided the products in high to excellent yield under solvent-free conditions. The structure of obtained nanoparticles was characterized by Fourier transform infrared spectrophotometry (FT-IR), field-emission scanning electron microscopy (FE-SEM), thermogravimetric analysis (TGA) and energy-dispersive X-ray spectroscopy (EDX). TGA result revealed that it is stable up to 200 °C for using as a catalyst in organic reactions. FE-SEM image of the synthesized nanocatalyst showed that it has nearly core-shell spherical shape and uniform size distribution with an average size about 80 nm. Moreover, the catalyst could be easily recovered by facile separation by magnetic forces and recycled for several times without significant loss of its catalytic activity. The benefits of this study are simplicity, nontoxicity, low cost, simple workup, and an environmentally benign nature.
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Affiliation(s)
- Ali Maleki
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran.
| | - Razieh Firouzi-Haji
- Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran
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147
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Synthesis of Ultrafine Silver Nanoparticles on the Surface of Fe3O4@SiO2@KIT-6-NH2 Nanocomposite and Their Application as a Highly Efficient and Reusable Catalyst for Reduction of Nitrofurazone and Aromatic Nitro Compounds Under Mild Conditions. Catal Letters 2018. [DOI: 10.1007/s10562-018-2611-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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148
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Raja PMV, Esquenazi GL, Wright KD, Gowenlock CE, Brinson BE, Alexander S, Jones DR, Gangoli VS, Barron AR. Aqueous electromigration of single-walled carbon nanotubes and co-electromigration with copper ions. NANOSCALE 2018; 10:19628-19637. [PMID: 30325388 DOI: 10.1039/c8nr06485g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The electromigration behaviour of raw and acid purified single walled carbon nanotubes (SWCNTs) in dilute aqueous systems (0.0034 mg mL-1), in the absence of surfactant, with the addition of either 0.85 M acetic acid or 0.1 M CuSO4, was evaluated using a 2-inch copper cathode and either a 2-inch copper or 0.5-inch platinum anode. The results showed that the electromigration of raw SWCNTs (with a high catalyst residue) in the presence of CuSO4 resulted in the formation of a Cu-SWCNT composite material at the cathode. In contrast, acid purified SWCNTs were observed to diffuse to a copper anode, creating fibrillated agglomerates with "rice-grain"-like morphologies. Upon acidification with acetic acid (or addition of CuSO4) the direction of electromigration reversed towards the cathode as a result of coordination of Cu2+ to the functional groups on the SWCNT overcoming the inherent negative charge of the acid purified SWCNTs. The result was the co-deposition of SWCNTs and Cu metal on the cathode. Addition of 0.005 M EDTA sequesters some of the Cu2+ and resulted in the separation of metal decorated SWCNTs to the cathode and un-decorated SWCNTs to the anode. The resulting SWCNT and Cu/SWCNT deposits were characterized by Raman spectroscopy, XPS, SEM, EDS, and TEM.
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Affiliation(s)
- Pavan M V Raja
- Department of Chemistry, Rice University, Houston, TX 77005, USA.
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149
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Dong C, Ji J, Shen B, Xing M, Zhang J. Enhancement of H 2O 2 Decomposition by the Co-catalytic Effect of WS 2 on the Fenton Reaction for the Synchronous Reduction of Cr(VI) and Remediation of Phenol. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:11297-11308. [PMID: 30180549 DOI: 10.1021/acs.est.8b02403] [Citation(s) in RCA: 163] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The greatest problem in the Fe(II)/H2O2 Fenton reaction is the low production of ·OH owing to the inefficient Fe(III)/Fe(II) cycle and the low decomposition efficiency of H2O2 (<30%). Herein, we report a new discovery regarding the significant co-catalytic effect of WS2 on the decomposition of H2O2 in a photoassisted Fe(II)/H2O2 Fenton system. With the help of WS2 co-catalytic effect, the H2O2 decomposition efficiency can be increased from 22.9% to 60.1%, such that minimal concentrations of H2O2 (0.4 mmol/L) and Fe2+ (0.14 mmol/L) are necessary for the standard Fenton reaction. Interestingly, the co-catalytic Fenton strategy can be applied to the simultaneous oxidation of phenol (10 mg/L) and reduction of Cr(VI) (40 mg/L), and the corresponding degradation and reduction rates can reach up to 80.9% and 90.9%, respectively, which are much higher than the conventional Fenton reaction (52.0% and 31.0%). We found that the expose reductive W4+ active sites on the surface of WS2 can greatly accelerate the rate-limiting step of Fe3+/Fe2+ conversion, which plays the key role in the decomposition of H2O2 and the reduction of Cr(VI). Our discovery represents a breakthrough in the field of inorganic catalyzing AOPs and greatly advances the practical utility of this method for environmental applications.
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Affiliation(s)
- Chencheng Dong
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering , East China University of Science and Technology , 130 Meilong Road , Shanghai 200237 , PR China
| | - Jiahui Ji
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering , East China University of Science and Technology , 130 Meilong Road , Shanghai 200237 , PR China
| | - Bin Shen
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering , East China University of Science and Technology , 130 Meilong Road , Shanghai 200237 , PR China
| | - Mingyang Xing
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering , East China University of Science and Technology , 130 Meilong Road , Shanghai 200237 , PR China
| | - Jinlong Zhang
- Key Laboratory for Advanced Materials and Institute of Fine Chemicals, School of Chemistry & Molecular Engineering , East China University of Science and Technology , 130 Meilong Road , Shanghai 200237 , PR China
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150
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Deepa B, Rajendran V. Pure and Cu metal doped WO3 prepared via co-precipitation method and studies on their structural, morphological, electrochemical and optical properties. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.nanoso.2018.06.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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