101
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Kanth N, Xu W, Prasad U, Ravichandran D, Kannan AM, Song K. PMMA-TiO 2 Fibers for the Photocatalytic Degradation of Water Pollutants. NANOMATERIALS (BASEL, SWITZERLAND) 2020; 10:E1279. [PMID: 32629803 PMCID: PMC7407631 DOI: 10.3390/nano10071279] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 06/20/2020] [Accepted: 06/21/2020] [Indexed: 11/16/2022]
Abstract
Titanium dioxide (TiO2) is a promising photocatalyst that possesses a redox potential suitable for environmental remediation applications. A low photocatalytic yield and high cost have thus far limited the commercial adoption of TiO2-based fixed-bed reactors. One solution is to engineer the physical geometry or chemical composition of the substrate to overcome these limitations. In this work, porous polymethyl methacrylate (PMMA) substrates with immobilized TiO2 nanoparticles in fiber forms were fabricated and analyzed to demonstrate the influence of contaminant transport and light accessibility on the overall photocatalytic performance. The influences of (i) fiber porosity and (ii) fiber architecture on the overall photocatalytic performance were investigated. The porous structure was fabricated using wet phase inversion. The core-shell-structured fibers exhibited much higher mechanical properties than the porous fibers (7.52 GPa vs. non-testability) and maintained the same degradation rates as porous structures (0.059 vs. 0.053/min) in removing methylene blue with comparable specific surface areas. The highest methylene blue (MB) degradation rate (kMB) of 0.116 min-1 was observed due to increases of the exposed surface area, pointing to more efficient photocatalysis by optimizing core-shell dimensions. This research provides an easy-to-manufacture and cost-efficient method for producing PMMA/TiO2 core-shell fibers with a broad application in water treatment, air purification, and volatile sensors.
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Affiliation(s)
- Namrata Kanth
- Materials Science & Engineering, School for Engineering of Matter, Transport and Energy (SEMTE), Ira A. Fulton Schools of Engineering, Arizona State University, Tempe, AZ 85281, USA;
| | - Weiheng Xu
- System Engineering, The Polytechnic School (TPS), Ira A. Fulton Schools of Engineering, Arizona State University, Mesa, AZ 85212, USA; (W.X.); (U.P.); (D.R.)
| | - Umesh Prasad
- System Engineering, The Polytechnic School (TPS), Ira A. Fulton Schools of Engineering, Arizona State University, Mesa, AZ 85212, USA; (W.X.); (U.P.); (D.R.)
| | - Dharneedar Ravichandran
- System Engineering, The Polytechnic School (TPS), Ira A. Fulton Schools of Engineering, Arizona State University, Mesa, AZ 85212, USA; (W.X.); (U.P.); (D.R.)
| | - Arunachala Mada Kannan
- The Polytechnic School, School for Engineering of Matter, Transport, and Energy (SEMTE), Ira A. Fulton Schools of Engineering, Arizona State University, Mesa, AZ 85212, USA;
| | - Kenan Song
- The Polytechnic School, School for Engineering of Matter, Transport, and Energy (SEMTE), Ira A. Fulton Schools of Engineering, Arizona State University, Mesa, AZ 85212, USA;
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102
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Vinay S, Udayabhanu, Sumedha H, Nagaraju G, Harishkumar S, Chandrasekhar N. Facile combustion synthesis of Ag
2
O nanoparticles using cantaloupe seeds and their multidisciplinary applications. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5830] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- S.P. Vinay
- Research and Development Centre, Department of Chemistry Shridevi Institute of Engineering and Technology Tumakuru Karnataka 572106 India
| | - Udayabhanu
- Energy Materials Research Laboratory, Department of Chemistry Siddaganga Institute of Technology Tumakuru Karnataka 572103 India
| | - H.N. Sumedha
- Energy Materials Research Laboratory, Department of Chemistry Siddaganga Institute of Technology Tumakuru Karnataka 572103 India
| | - G. Nagaraju
- Energy Materials Research Laboratory, Department of Chemistry Siddaganga Institute of Technology Tumakuru Karnataka 572103 India
| | - S. Harishkumar
- Energy Materials Research Laboratory, Department of Chemistry Siddaganga Institute of Technology Tumakuru Karnataka 572103 India
- Department of Pharmaceutical Chemistry Kuvempu University, Post‐Graduate Centre Kadur Karnataka 572103 India
| | - N. Chandrasekhar
- Research and Development Centre, Department of Chemistry Shridevi Institute of Engineering and Technology Tumakuru Karnataka 572106 India
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103
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ACİK G. A comprehensive study on electrospinning of poly (vinyl alcohol): effects of the TCD, applied voltage, flow rate and solution concentration. JOURNAL OF THE TURKISH CHEMICAL SOCIETY, SECTION A: CHEMISTRY 2020. [DOI: 10.18596/jotcsa.741452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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104
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da Silveira Salla J, da Boit Martinello K, Dotto GL, García-Díaz E, Javed H, Alvarez PJ, Foletto EL. Synthesis of citrate–modified CuFeS2 catalyst with significant effect on the photo–Fenton degradation efficiency of bisphenol a under visible light and near–neutral pH. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124679] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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105
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Zhang Y, Zhou S, Su X, Xu J, Nie G, Zhang Y, He Y, Yu S. Synthesis and characterization of Ag-loaded p-type TiO 2 for adsorption and photocatalytic degradation of tetrabromobisphenol A. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2020; 92:713-721. [PMID: 31650659 DOI: 10.1002/wer.1264] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 10/19/2019] [Accepted: 10/23/2019] [Indexed: 06/10/2023]
Abstract
A p-type TiO2 with Ti vacancies (D-TiO2 ) was synthesized by a facile solvothermal treatment, and Ag/TiO2 with different Ag loading amount was prepared through a photo-reduction deposition method. The samples were characterized through scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The adsorption and photocatalytic characteristics of tetrabromobisphenol A (TBBPA) on D-TiO2 and Ag/TiO2 were investigated. The adsorption of TBBPA on Ag/TiO2 was significantly enhanced and was five times greater than that of pure TiO2 . The increase in pH significantly inhibited the adsorption of TBBPA. The 2%-Ag/TiO2 nearly completely degraded TBBPA in 10 min under UV-Vis light (λ > 360 nm), and the apparent reaction rate constant (kapp ) reached 0.63 min-1 . The significantly enhanced UV-Vis light catalytic properties of the Ag/TiO2 in comparison with that of TiO2 were attributed to the increased adsorption capacity and electron transfer ability of the Ag/TiO2 . Free radical trap experiments results showed that holes and superoxide radicals play a major role in the catalytic degradation of TBBPA by Ag/TiO2 . Moreover, the Ag/TiO2 catalyst exhibits high stability during TBBPA degradation even after three cycles. PRACTITIONER POINTS: Ti-defected TiO2 and Ag/TiO2 were synthesized using a solvothermal and photo-reduction deposition, respectively. Ag/TiO2 exhibited outstanding adsorption and photocatalytic activity for TBBPA removal under UV-Vis light. Holes and superoxide radicals play a major role in the photocatalytic degradation of TBBPA.
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Affiliation(s)
- Yunhai Zhang
- College of Environmental Science and Engineering, Nanjing Tech University, Nanjing, China
| | - Shuangxi Zhou
- College of Environmental Science and Engineering, Nanjing Tech University, Nanjing, China
| | - Xin Su
- College of Environmental Science and Engineering, Nanjing Tech University, Nanjing, China
| | - Jimin Xu
- College of Environmental Science and Engineering, Nanjing Tech University, Nanjing, China
| | - Guangze Nie
- College of Environmental Science and Engineering, Nanjing Tech University, Nanjing, China
| | - Yongjun Zhang
- College of Environmental Science and Engineering, Nanjing Tech University, Nanjing, China
| | - Yide He
- College of Environmental Science and Engineering, Nanjing Tech University, Nanjing, China
| | - Shuili Yu
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science & Engineering, Tongji University, Shanghai, China
- Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
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106
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Fabrication of zeolite NaX-doped electrospun porous fiber membrane for simultaneous ammonium recovery and organic carbon enrichment. J Memb Sci 2020. [DOI: 10.1016/j.memsci.2020.118030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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107
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Javed H, Lyu C, Sun R, Zhang D, Alvarez PJJ. Discerning the inefficacy of hydroxyl radicals during perfluorooctanoic acid degradation. CHEMOSPHERE 2020; 247:125883. [PMID: 31978654 DOI: 10.1016/j.chemosphere.2020.125883] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 01/08/2020] [Accepted: 01/09/2020] [Indexed: 06/10/2023]
Abstract
Perfluorooctanoic acid (PFOA) is a recalcitrant contaminant of emerging concern, and there is growing interest in advanced oxidation processes to degrade it. However, there is ambiguity in the literature about the efficacy of hydroxyl radicals (OH) for degrading PFOA. Here, we resolve this controversy by comparing PFOA degradation by UV photolysis (254 nm, 6 × 10-6 E/L.s) versus UV + H2O2, which produces OH. We optimized OH production in a UV + H2O2 system using nitrobenzene (NB) as a OH probe, but even under optimized conditions (i.e., 5 g/L H2O2), no significant difference occurred in PFOA removal by UV photolysis (21.1 ± 0.4%) versus UV + H2O2 (19.7 ± 0.7%) after 1-day treatment. Both treatments also resulted in similar daughter by-product concentrations and defluorination efficiencies (9.5 ± 1.7% for UV photolysis and 6.8 ± 1.0% for UV + H2O2), which indicates that OH is ineffective towards PFOA degradation and infers that other degradation mechanisms that are independent of OH production should be explored.
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Affiliation(s)
- Hassan Javed
- NSF Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), USA; Dept. of Chemistry, Rice University, Houston, TX, 77005, USA
| | - Cong Lyu
- Key Lab of Groundwater Resources and Environment, Jilin University, Changchun, PR China
| | - Ruonan Sun
- Dept. of Civil and Environmental Engineering, Rice University, Houston, TX, 77005, USA
| | - Danning Zhang
- NSF Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), USA; Dept. of Civil and Environmental Engineering, Rice University, Houston, TX, 77005, USA
| | - Pedro J J Alvarez
- NSF Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), USA; Dept. of Chemistry, Rice University, Houston, TX, 77005, USA; Dept. of Civil and Environmental Engineering, Rice University, Houston, TX, 77005, USA.
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108
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Wei K, Wang Z, Ouyang C, Cao X, Liang P, Huang X, Zhang X. A hybrid fluidized-bed reactor (HFBR) based on arrayed ceramic membranes (ACMs) coupled with powdered activated carbon (PAC) for efficient catalytic ozonation: A comprehensive study on a pilot scale. WATER RESEARCH 2020; 173:115536. [PMID: 32032886 DOI: 10.1016/j.watres.2020.115536] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 12/16/2019] [Accepted: 01/21/2020] [Indexed: 06/10/2023]
Abstract
Taking advantage of the high mass transfer in the bulk solution of fluidized-bed reactor (FBR), and the benefits of simultaneous particle separation and ozone catalysis on ceramic membranes, we proposed a hybrid fluidized-bed reactor (HFBR) based on arrayed ceramic membranes (ACMs) coupled with powdered activated carbon (PAC) for efficient catalytic ozonation. The optimum HFBR performance on a pilot scale was found at PAC addition of 3 g/L, ozone dosage of 25 mg/L, hydraulic retention time of 60 min and auxiliary aeration strength of 5 m3/h. During the 30-day treatment of coal-gasification secondary effluent (200 L/h), the HFBR system revealed not only a 117% increase in ozone utilization efficiency (ΔCOD/ΔO3) upon pure ozonation but also a highly purified effluent with better sterilization and low residual bromate (∼11 μg/L). Low-molecular-weight organic fragments and acids, as well as phthalate esters were identified as the main products in this process. By density functional theory (DFT) calculations, it was found the main functional groups (carbonyls, -C=O) on the PAC could be protected from direct ozonation in the presence of ozone-degradable organics (e.g. phenolic and aliphatic compounds) in the wastewater through an ozone-competing reaction, which prevented the rapid inactivation of the PAC in catalytic ozonation. A longer service life and cheaper materials for ceramic membranes would benefit low operation costs for the HFBR. Moreover, the addition of PAC could greatly reduce ozone demand by ∼60% in the HFBR, and therefore decrease energy consumption by ∼30%. Hence, the HFBR was proved to be a highly competitive technology for wide application in the near future.
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Affiliation(s)
- Kajia Wei
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Zhuo Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Changpei Ouyang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Xiaoxin Cao
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Peng Liang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Xia Huang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Xiaoyuan Zhang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
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109
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Yuan Q, Zhang D, Yu P, Sun R, Javed H, Wu G, Alvarez PJJ. Selective Adsorption and Photocatalytic Degradation of Extracellular Antibiotic Resistance Genes by Molecularly-Imprinted Graphitic Carbon Nitride. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:4621-4630. [PMID: 32150399 DOI: 10.1021/acs.est.9b06926] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
There is a growing need to mitigate the discharge of extracellular antibiotic resistance genes (ARGs) from municipal wastewater treatment systems. Here, molecularly-imprinted graphitic carbon nitride (MIP-C3N4) nanosheets were synthesized for selective photocatalytic degradation of a plasmid-encoded ARG (blaNDM-1, coding for multidrug resistance New Delhi metallo-β-lactamase-1) in secondary effluent. Molecular imprinting with guanine enhanced ARG adsorption, which improved the utilization of photogenerated oxidizing species to degrade blaNDM-1 rather than being scavenged by background nontarget constituents. Consequently, photocatalytic removal of blaNDM-1 in secondary effluent with MIP-C3N4 (k = 0.111 ± 0.028 min-1) was 37 times faster than with bare graphitic carbon nitride (k = 0.003 ± 0.001 min-1) under UVA irradiation (365 nm, 3.64 × 10-6 Einstein/L·s). MIP-C3N4 can efficiently catalyze the fragmentation of blaNDM-1, which decreased the potential for ARG repair by transformed bacteria. Molecular imprinting also changed the primary degradation pathway; electron holes (h+) were the predominant oxidizing species responsible for blaNDM-1 removal with MIP-C3N4 versus free radicals (i.e., ·OH and O2-) for coated but nonimprinted C3N4. Overall, MIP-C3N4 efficiently removed blaNDM-1 from secondary effluent, demonstrating the potential for molecular imprinting to enhance the selectivity and efficacy of photocatalytic processes to mitigate dissemination of antibiotic resistance from sewage treatment systems.
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Affiliation(s)
- Qingbin Yuan
- College of Environmental Science and Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China
| | - Danning Zhang
- Department of Civil and Environmental Engineering, Rice University, Houston, Texas 77005, United States
- Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), Houston, Texas 77005, United States
| | - Pingfeng Yu
- Department of Civil and Environmental Engineering, Rice University, Houston, Texas 77005, United States
- Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), Houston, Texas 77005, United States
| | - Ruonan Sun
- Department of Civil and Environmental Engineering, Rice University, Houston, Texas 77005, United States
- Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), Houston, Texas 77005, United States
| | - Hassan Javed
- Department of Civil and Environmental Engineering, Rice University, Houston, Texas 77005, United States
- Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), Houston, Texas 77005, United States
| | - Gang Wu
- Department of Internal Medicine, University of Texas-McGovern Medical School, Houston, Texas 77030,United States
| | - Pedro J J Alvarez
- Department of Civil and Environmental Engineering, Rice University, Houston, Texas 77005, United States
- Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), Houston, Texas 77005, United States
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110
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Islam MT, Dominguez A, Turley RS, Kim H, Sultana KA, Shuvo M, Alvarado-Tenorio B, Montes MO, Lin Y, Gardea-Torresdey J, Noveron JC. Development of photocatalytic paint based on TiO 2 and photopolymer resin for the degradation of organic pollutants in water. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 704:135406. [PMID: 31896226 DOI: 10.1016/j.scitotenv.2019.135406] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 11/05/2019] [Accepted: 11/05/2019] [Indexed: 06/10/2023]
Abstract
While the use of TiO2 nanoparticles in the form of slurry/suspension requires energy-intensive separation processes, its immobilization in solid support may open new opportunities in the area of sustainable water treatment technologies. In this study, a novel method for the development of photocatalytic paint based on TiO2 nanoparticles and acrylate-based photopolymer resin is reported. The paint (TiO2@polymer) was applied on substrates such as plastic petri dish and glass jar, which was polymerized/solidified by ultraviolet light irradiation. The painted petri dish and glass jar were used for the photocatalytic degradation of model organic pollutants viz. methyl orange (MO), methylene blue (MB), and indole in deionized water, simulated fresh drinking water, and tap water matrices. The photocatalytic degradation studies were performed under sunlight and UV-B light were used for. The sunlight-assisted photocatalytic degradation of MO and MB was found to be faster and more efficient than the UV-B light-assisted ones. Under UV-B light irradiation, it took 120 min to degrade about 80% of 6 ppm MB solution, whereas under sunlight irradiation it took 60 min to degrade about 90% of the same MB solution. The photocatalytic paint generated hydroxyl radical (·OH) under the UV-B and sunlight irradiation, which was studied by the terephthalic acid fluorescence tests. Further, the potential release of TiO2 during the exposure to UV irradiation was studied by single particle ICP-MS analysis.
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Affiliation(s)
- Md T Islam
- Department of Chemistry, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; Department of Chemistry, University of Texas Permian Basin, 4901 E University Blvd, Odessa, TX 7976, USA; NSF Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), Rice University, MS 6398, 6100 Main Street, Houston, USA.
| | - Arieana Dominguez
- Department of Chemistry, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA
| | - Reagan S Turley
- Department of Chemistry, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; NSF Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), Rice University, MS 6398, 6100 Main Street, Houston, USA
| | - Hoejin Kim
- Department of Mechanical Engineering, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA
| | - Kazi A Sultana
- Department of Environmental Science and Engineering, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA
| | - Mai Shuvo
- Department of Mechanical Engineering, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA
| | - Bonifacio Alvarado-Tenorio
- Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez, Av. Plutarco Elías Calles # 1210, Fracc.Foviste Chamizal Ciudad Juárez, Chih. C.P 32310, Mexico
| | - Milka O Montes
- Department of Chemistry, University of Texas Permian Basin, 4901 E University Blvd, Odessa, TX 7976, USA
| | - Yirong Lin
- Department of Mechanical Engineering, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA
| | - Jorge Gardea-Torresdey
- Department of Chemistry, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; NSF Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), Rice University, MS 6398, 6100 Main Street, Houston, USA; Department of Environmental Science and Engineering, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA
| | - Juan C Noveron
- Department of Chemistry, University of Texas at El Paso, 500 West University Avenue, El Paso, TX 79968, USA; NSF Nanosystems Engineering Research Center for Nanotechnology Enabled Water Treatment (NEWT), Rice University, MS 6398, 6100 Main Street, Houston, USA.
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111
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Liu Y, Wang L, Xue N, Wang P, Pei M, Guo W. Ultra-Highly Efficient Removal of Methylene Blue Based on Graphene Oxide/TiO 2/Bentonite Sponge. MATERIALS 2020; 13:ma13040824. [PMID: 32054129 PMCID: PMC7078707 DOI: 10.3390/ma13040824] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 02/06/2020] [Accepted: 02/09/2020] [Indexed: 11/23/2022]
Abstract
An ultra-highly efficient Graphene Oxide/TiO2/Bentonite (GO/TiO2/Bent) sponge was synthesized using an in situ hydrothermal method. GO/TiO2/Bent sponge with a GO mass concentration of 10% exhibited the highest treatment efficiency of methylene blue (MB), combining adsorption and photocatalytic degradation, and achieved a maximum removal efficiency of 100% within about 70 min. To further prove the ultra-high removal capacity of the sponge, the concentration of MB in water increased to ten times the original concentration. At so high a MB concentration, the removal rate was still as high as 80% in 90 min. The photocatalytic mechanism of GO/TiO2/Bent sponge was discussed through XPS, PL and radicals quenching experiments. Here Bent can immobilize TiO2 and react with a photo-generated hole to increase the amount of hydroxyl radical; effectively enhancing the degradation of MB.GO sponge enlarges the sensitivity range of TiO2 to visible light by increasing the charge separation of TiO2 and reducing the recombination of photo-generated electron–hole pairs. Additionally, GO sponge with an interconnected porous structure provides an effective platform to immobilize TiO2/bent and makes them be easily recovered. The as-prepared sponge develops a simple and cost-effective strategy to realize the ultra-highly efficient treatment of dyes in wastewater.
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Affiliation(s)
- Yuan Liu
- School of chemistry and chemical Engineering, University of Jinan, Jinan 250022, China; (Y.L.); (P.W.); (M.P.)
| | - Luyan Wang
- School of chemistry and chemical Engineering, University of Jinan, Jinan 250022, China; (Y.L.); (P.W.); (M.P.)
- Correspondence: ; Tel.: +86-531-89736800
| | - Ni Xue
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
| | - Pengxiang Wang
- School of chemistry and chemical Engineering, University of Jinan, Jinan 250022, China; (Y.L.); (P.W.); (M.P.)
| | - Meishan Pei
- School of chemistry and chemical Engineering, University of Jinan, Jinan 250022, China; (Y.L.); (P.W.); (M.P.)
| | - Wenjuan Guo
- Institute of Surface Analysis and Chemical Biology, University of Jinan, Jinan 250022, China;
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112
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Wu K, Liu X, Li Z, Jiao Y, Zhou C. Fabrication of chitosan/graphene oxide composite aerogel microspheres with high bilirubin removal performance. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 106:110162. [DOI: 10.1016/j.msec.2019.110162] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 04/08/2019] [Accepted: 09/03/2019] [Indexed: 12/19/2022]
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113
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Du F, Sun L, Huang Z, Chen Z, Xu Z, Ruan G, Zhao C. Electrospun reduced graphene oxide/TiO 2/poly(acrylonitrile-co-maleic acid) composite nanofibers for efficient adsorption and photocatalytic removal of malachite green and leucomalachite green. CHEMOSPHERE 2020; 239:124764. [PMID: 31527004 DOI: 10.1016/j.chemosphere.2019.124764] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 09/01/2019] [Accepted: 09/04/2019] [Indexed: 05/21/2023]
Abstract
Electrospun reduced graphene oxide/TiO2/poly(acrylonitrile-co-maleic acid) composite nanofibers (E-spun RGO/TiO2/PANCMA NFs) were fabricated using electrospinning of the dispersive solution of PANCMA, GO and TiO2 followed by post-chemical reduction. The obtained composite nanofibers were compressed in a dialyzer and then used to absorb and degrade malachite green (MG) and leucomalachite green (LMG) from aqueous solution. Compared to the E-spun TiO2/PANCMA and GO/TiO2/PANCMA NFs, the E-spun RGO/TiO2/PANCMA NFs exhibited higher adsorption capacity and photocatalytic degradation ability. Under optimized conditions, 90.6% of MG and 93.7% of LMG from 50 mL aqueous sample solution were adsorbed on the RGO/TiO2/PANMA NFs (3.0 mg fibers) in 2.0 min, and subsequent the 91.4% and 95.2% of MG and LMG adsorbed on the NFs were degradated in 60 min under UV irradiation, respectively. In addition, the E-spun RGO/TiO2/PANMA NFs exhibited good reusability and could be reused in multiple cycles of operations for adsorption and photocatalytic degradation of MG and LMG. This work demonstrated that the electrospun composite nanofibers are promising materials for removal of pollutants from environmental water samples.
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Affiliation(s)
- Fuyou Du
- College of Biological and Environmental Engineering, Changsha University, Changsha, 410003, PR China; Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, PR China.
| | - Lingshun Sun
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, PR China
| | - Zhujun Huang
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, PR China
| | - Zhengyi Chen
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, PR China
| | - Zhigang Xu
- Faculty of Science, Kunming University of Science and Technology, Kunming, 650500, PR China
| | - Guihua Ruan
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, 541004, PR China.
| | - Chenxi Zhao
- College of Biological and Environmental Engineering, Changsha University, Changsha, 410003, PR China.
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Su J, Cheng C, Guo Y, Xu H, Ke Q. OMS-2-based catalysts with controllable hierarchical morphologies for highly efficient catalytic oxidation of formaldehyde. JOURNAL OF HAZARDOUS MATERIALS 2019; 380:120890. [PMID: 31325698 DOI: 10.1016/j.jhazmat.2019.120890] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Revised: 06/05/2019] [Accepted: 07/11/2019] [Indexed: 06/10/2023]
Abstract
Cryptomelane-type octahedral molecular sieve (OMS-2) catalysts are currently attracting tremendous attention due to their low-cost and remarkable thermo-catalytic activity. However, it is still difficult for OMS-2 catalysts to completely degrade formaldehyde at relatively low or even ambient temperature. In this work, OMS-2 catalysts with different ratios of length to diameter were prepared and the OMS-2-s with the minim ratio of length to diameter (1-3) exhibited the best catalytic performance than the other samples. Then, the optimized OMS-2-s nanorods were loaded on the SiO2 nanofibers via a simultaneous electrospining-spray strategy. The evaluation for the dynamic catalytic activities of the samples showed that, the T50 (HCHO conversion reached to 50%) for the OMS-2/SiO2 nanofibrous membranes was decreased by 24 °C than the OMS-2-s nanorods. Furthermore, in the static experiment of HCHO decomposition, the composite membrane could achieve a catalytic efficiency of 52.3% at 25 °C, much higher than that of the OMS-2-s nanorods (45.9%). This work offers a new strategy to improve the catalytic efficiency of OMS-2 by controlling the morphology and loading of OMS-2 nanorods, and also designs a kind of advanced nano OMS-2-based nanofibrous membranes with hierarchical nanostructures for the highly efficient formaldehyde elimination during the practical application.
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Affiliation(s)
- Jiafei Su
- College of Life and Environmental Sciences, Shanghai Normal University, No. 100 Guilin Road, Shanghai 200234, China
| | - Cuilian Cheng
- College of Life and Environmental Sciences, Shanghai Normal University, No. 100 Guilin Road, Shanghai 200234, China
| | - Yaping Guo
- College of Life and Environmental Sciences, Shanghai Normal University, No. 100 Guilin Road, Shanghai 200234, China
| | - He Xu
- College of Life and Environmental Sciences, Shanghai Normal University, No. 100 Guilin Road, Shanghai 200234, China.
| | - Qinfei Ke
- College of Life and Environmental Sciences, Shanghai Normal University, No. 100 Guilin Road, Shanghai 200234, China.
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115
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Wu Y, Sun Y, Zhou C, Niu J. Regeneration of porous electrospun membranes embedding alumina nanoparticles saturated with minocycline by UV radiation. CHEMOSPHERE 2019; 237:124495. [PMID: 31394452 DOI: 10.1016/j.chemosphere.2019.124495] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 07/26/2019] [Accepted: 07/29/2019] [Indexed: 06/10/2023]
Abstract
A regeneration method for porous electrospun membranes embedding alumina nanoparticles saturated with minocycline was investigated by UV-LED system. The percentage of adsorption capacities before and after regeneration were used to evaluate regeneration efficiency. The PVDF and PVDF-Al2O3 fiber mats were prepared by electrospinning technique. Scanning electron microscope (SEM), transmission electron microscope (TEM), energy-dispersive X-ray spectroscopy (EDS) analyses directly confirmed that Al2O3 nanoparticles were generally exposed to the surface of PVDF-Al2O3 fiber mats. Among them, PVDF-Al2O3 10% fiber mats can effectively adsorb minocycline (remove efficiency >97% in 18 h) with first-order rate constant k = 2.253 ± 0.331 h-1. The sorption capacity can still keep 81% after five sorption/UV-regeneration circulations. Two successional stages may exist during regeneration: (i) transfer of minocycline from the surface of PVDF-Al2O3 fibers to the DI water, followed by the (ii) decomposition of this compound in aqueous solution by direct and indirect photolysis to yield the intermediate species. The desorption capacity and desorption percentage were 4.39 mg g-1 and 23.30% respectively. The regeneration yields were further enhanced to 94.20% by UV radiation. Minocycline was effectively degraded to intermediate products by direct and indirect photolysis, further degraded into CO2, H2O, and NOx by UV-generated ozone during regeneration. The results indicated that UV radiation was an effective method of regenerating PVDF-Al2O3 fiber mats with low energy requirements. The photochemical byproducts and the reaction sites during regeneration were also determined and recognized.
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Affiliation(s)
- Yuandong Wu
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Yanlong Sun
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Chengzhi Zhou
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China
| | - Junfeng Niu
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, China.
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116
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Photo-degradation of dexamethasone phosphate using UV/Iodide process: Kinetics, intermediates, and transformation pathways. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.111703] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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117
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Lv C, Chen S, Xie Y, Wei Z, Chen L, Bao J, He C, Zhao W, Sun S, Zhao C. Positively-charged polyethersulfone nanofibrous membranes for bacteria and anionic dyes removal. J Colloid Interface Sci 2019; 556:492-502. [DOI: 10.1016/j.jcis.2019.08.062] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Revised: 08/15/2019] [Accepted: 08/16/2019] [Indexed: 12/19/2022]
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118
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Zhang L, Wang Z, Hu C, Shi B. Accelerated degradation of pollutants via a close interface connection in heterojunction, and special solid-liquid interactions. J Colloid Interface Sci 2019; 553:598-605. [PMID: 31247498 DOI: 10.1016/j.jcis.2019.06.030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 06/08/2019] [Accepted: 06/10/2019] [Indexed: 11/30/2022]
Abstract
The solid-solid or solid-liquid interfaces are vital for the photocatalytic reaction. Herein, AgI nanoparticles (NPs) attached on the (0 1 1) plane of Ag2WO4 nanorods were synthesized by a facile method at room temperature. The co-crystalization of the two components caused their phase transformation and the existence of a strong interface interaction. Meanwhile, the porous batt-like morphology of AgI NPs provided more contact sites for organic pollutants to induce a strong interaction at the solid-liquid interface. The heterojunction nanocatalyst was found to be highly effective for the degradation and mineralization of various pollutants, including the endocrine-disrupting chemical bisphenol A, the antibiotics sulfamethoxazole and ciprofloxacin, and the azo-dye methyl orange under visible light (λ > 420 nm). Its photocatalytic rate was 91, 52, and 39 times higher than that of bulk AgI, standard TiO2-xNx, and the physical mixture of the two components, respectively. Further studies demonstrated that the strong interactions between the two components and the pollutants promoted the electron transfer from organic pollutants to AgI NPs and then from AgI NPs to Ag2WO4 nanorods, resulting in the rapid oxidation of pollutants and the formation of Ag NPs. The newly formed Ag NPs further accelerated the degradation of pollutants due to a SPR effect and an empty levels feeding role to produce h+ on Ag2WO4, which can oxidize surface-adsorbed H2O into OH. This photocatalytic system provided a platform for understanding solid-solid and solid-liquid interface interaction and a novel design idea for water pollutants removal.
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Affiliation(s)
- Lili Zhang
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Zhiqiang Wang
- State Key Laboratory of Separation Membranes and Membrane Processes, Tianjin Polytechnic University, Tianjin 300387, China
| | - Chun Hu
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; 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.
| | - Baoyou Shi
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
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119
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Sun Z, Yuan F, Zhang X, Zhu R, Shen X, Sun B, Wang B. Design and synthesis of organic rectorite-based composite nanofiber membrane with enhanced adsorption performance for bisphenol A. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:28860-28870. [PMID: 31385252 DOI: 10.1007/s11356-019-06069-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 07/25/2019] [Indexed: 06/10/2023]
Abstract
Nowadays, most of mineral-based adsorbents are powder form, which makes them inconvenient to collect and always easy to cause secondary pollution. In this work, an organic rectorite composite nanofiber membrane (SRt-PAN) was designed and prepared by electrospinning technique. The as-received composite nanofiber membranes were characterized by XRD and SEM analysis, proving the homodisperse and existence of SRt in PAN nanofiber membrane. A series of batch experiments for BPA adsorption were carried out to investigate the effect of different adsorption parameters, including initial concentration, pH, and temperature of pollutant solution. The influences of modifier dosage and adsorbent dosage on the adsorption performance were investigated as well. On the basis of the experiment results, the adsorption process could be well described by the pseudo-second-order model and the Langmuir isotherm. In addition, the thermodynamic parameters indicate that this adsorption process is exothermic and spontaneous. Moreover, compared with pure nanofiber membranes and organic rectorite powders, the resultant SRt-PAN adsorbents exhibited higher adsorption capacity, superior reusability, and adsorption stability. It is indicated that the hydrophobicity surface of organic rectorite should be the key factor to not only the intimate interfacial combination between the mineral and PAN, but also the enhancement of BPA adsorption capacity.
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Affiliation(s)
- Zhiming Sun
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China.
| | - Fang Yuan
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China
| | - Xinchao Zhang
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China
| | - Rui Zhu
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China
| | - Xinyi Shen
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China
| | - Bingyan Sun
- School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing, 100083, China
| | - Bin Wang
- Beijing Key Laboratory of Clothing Materials R & D and Assessment, Beijing Engineering Research Center of Textile Nanofiber, School of Materials Science and Engineering, Beijing, 100029, China.
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120
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Jiao S, Liu L. Friction-Induced Enhancements for Photocatalytic Degradation of MoS2@Ti3C2 Nanohybrid. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b03680] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Songlong Jiao
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing 211189, People’s Republic of China
| | - Lei Liu
- Jiangsu Key Laboratory for Design and Manufacture of Micro-Nano Biomedical Instruments, School of Mechanical Engineering, Southeast University, Nanjing 211189, People’s Republic of China
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121
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Sarkhosh M, Sadani M, Abtahi M, Mohseni SM, Sheikhmohammadi A, Azarpira H, Najafpoor AA, Atafar Z, Rezaei S, Alli R, Bay A. Enhancing photo-degradation of ciprofloxacin using simultaneous usage of e aq- and OH over UV/ZnO/I - process: Efficiency, kinetics, pathways, and mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2019; 377:418-426. [PMID: 31176077 DOI: 10.1016/j.jhazmat.2019.05.090] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2018] [Revised: 04/06/2019] [Accepted: 05/27/2019] [Indexed: 06/09/2023]
Abstract
The aim of this study is to develop the process relies on the UV irradiation of ZnO and I-, i.e. UV/ZnO /I- (UZI), to create both oxidizer and reducer agents simultaneously for photo-degradation of the Ciprofloxacin (CIP). This paper shows that while applying UV irradiation, UV/ZnO and UV/I- for 20 min can lead to achieve 37.5%, 58.12%, and 61.4% photo-degradation of 100 mg L-1 CIP at pH 7, respectively. Moreover, the UZI treatment can provide 91.54% photo-degradation efficiency. The LC-MS analysis of the UZI effluent indicates that 10 min process was adequate to degrade CIP into simple ring-shaped metabolites while 15 min treatment, mostly of CIP intermediates were linear and biodegradable organic compounds. Furthermore, fourteen little fragments were identified in the CIP photo-degradation via UZI, during the photoreaction time of 2.5 to 20 min. Then, a pseudo first-order kinetics equation was utilized to model the observed photo-degradation process. Finally, the computational results show that the increased concentration of the CIP solution from 100 to 400 mg L-1 decreases the observed rate constant (kobs) from 0.4125 to 0.2189 min-1 while increases the photoreaction rate (robs) from 41.25 to 87.56 mg L-1 min-1.
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Affiliation(s)
- Maryam Sarkhosh
- Social Determinants of Health Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohsen Sadani
- Department of Environmental Health Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehrnoosh Abtahi
- Department of Environmental Health Engineering, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Mohsen Mohseni
- Student Research Committee, Department of Environmental Health Engineering, School of Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Amir Sheikhmohammadi
- Department of Environmental Health Engineering, School of Health, Khoy University of Medical Sciences, Khoy, Iran.
| | - Hossein Azarpira
- Department of Environmental Health Engineering, Social Determinants of Health Research Center, Saveh University of Medical Sciences, Saveh, Iran
| | - Ali Asghar Najafpoor
- Social Determinants of Health Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Zahra Atafar
- Research Center for Environmental Determinants of Health (RCEDH),, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Soheila Rezaei
- Social Determinants of Health Research Center, Yasuj University of Medical Sciences, Yasuj, Iran
| | - Rahim Alli
- Department of Environmental Health Engineering, Qom University of Medical Science and Health Services, Qom, Iran
| | - Abotalebe Bay
- Environmental Health Research Center, Golestan University of Medical Sciences, Gorgan, Iran
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122
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Chu C, Yang J, Huang D, Li J, Wang A, Alvarez PJJ, Kim JH. Cooperative Pollutant Adsorption and Persulfate-Driven Oxidation on Hierarchically Ordered Porous Carbon. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:10352-10360. [PMID: 31386358 DOI: 10.1021/acs.est.9b03067] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study presents a 3D hierarchically ordered porous carbon material (HOPC) that simultaneously achieves efficient adsorption of a range of water pollutants as well as catalytic oxidation of adsorbed pollutants. High adsorption capacity and rapid adsorption kinetics are attributed to the hydrophobic nature of the carbon substrate, the large surface area due to high porosity, and the relatively uniform size of pores that comprise the structure. The oxidative degradation is achieved by efficient mediation of electron transfer from pollutants to persulfate through the sp2-hybridized carbon and nitrogen network. As the persulfate activation and pollutant oxidation do not involve reactive radicals, oxidative degradation of the adsorbent is prevented, which has been a primary concern when adsorption and oxidation are combined either to regenerate adsorbate or to enhance oxidation performance. Batch tests showed that near complete removal of various recalcitrant micropollutants can be achieved within a short time (less than 1 min) even when treating a complex water matrix, as pollutants are concentrated on the surface of HOPC, where their oxidation is catalyzed.
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Affiliation(s)
- Chiheng Chu
- Department of Chemical and Environmental Engineering , Yale University , New Haven , Connecticut 06520-8286 , United States
- Nanotechnology-Enabled Water Treatment (NEWT) , Yale University , 17 Hillhouse Ave , New Haven , Connecticut 06511 , United States
| | - Ji Yang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Dalian 116023 , China
- State Key Laboratory for Physical Chemistry of Solid Surfaces and MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, iChEM, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China
| | - Dahong Huang
- Department of Chemical and Environmental Engineering , Yale University , New Haven , Connecticut 06520-8286 , United States
| | - Jianfeng Li
- State Key Laboratory for Physical Chemistry of Solid Surfaces and MOE Key Laboratory of Spectrochemical Analysis and Instrumentation, iChEM, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China
| | - Aiqin Wang
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics , Chinese Academy of Sciences , Dalian 116023 , China
| | - Pedro J J Alvarez
- Department of Civil and Environmental Engineering , Rice University , Houston , Texas 77005 , United States
- Nanotechnology-Enabled Water Treatment (NEWT) , Yale University , 17 Hillhouse Ave , New Haven , Connecticut 06511 , United States
| | - Jae-Hong Kim
- Department of Chemical and Environmental Engineering , Yale University , New Haven , Connecticut 06520-8286 , United States
- Nanotechnology-Enabled Water Treatment (NEWT) , Yale University , 17 Hillhouse Ave , New Haven , Connecticut 06511 , United States
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123
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Shi X, Zhang X, Ma L, Xiang C, Li L. TiO 2-Doped Chitosan Microspheres Supported on Cellulose Acetate Fibers for Adsorption and Photocatalytic Degradation of Methyl Orange. Polymers (Basel) 2019; 11:E1293. [PMID: 31382392 PMCID: PMC6723085 DOI: 10.3390/polym11081293] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 07/12/2019] [Accepted: 07/12/2019] [Indexed: 01/06/2023] Open
Abstract
Chitosan/cellulose acetate (CS/CA) used as a biopolymer systema, with the addition of TiO2 as photocatalyst (C-T/CA) were fabricated by alternating electrospinning/electrospraying technology. The uniform dispersion of TiO2 and its recovery after the removal of methyl orange (MO) was achieved by incorporating TiO2 in CS electrosprayed hemispheres. The effects of pH values, contact time, and the amount of TiO2 on adsorption and photocatalytic degradation for MO of the C-T/CA were investigated in detail. When TiO2 content was 3 wt %, the highest MO removal amount for fiber membranes (C-T-3/CA) reached 98% at pH value 4 and MO concentration of 40 mg/L. According to the data analysis, the pseudo-second-order kinetic and Freundlich isotherm model were well fitted to kinetic and equilibrium data of MO removal. Especially for C-T-3/CA, the fiber membrane exhibited multiple layers of adsorption. All these results indicated that adsorption caused by electrostatic interaction and photocatalytic degradation were involved in the MO removal process. This work provides a potential method for developing a novel photocatalyst with excellent catalytic activity, adsorbing capability and recycling use.
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Affiliation(s)
- Xuejuan Shi
- Key Laboratory of Automobile Materials, Ministry of Education, and College of Materials Science and Engineering, Jilin University, Changchun 130022, China
| | - Xiaoxiao Zhang
- Key Laboratory of Automobile Materials, Ministry of Education, and College of Materials Science and Engineering, Jilin University, Changchun 130022, China
| | - Liang Ma
- Key Laboratory of Automobile Materials, Ministry of Education, and College of Materials Science and Engineering, Jilin University, Changchun 130022, China
| | - Chunhui Xiang
- Department of Apparel, Events and Hospitality Management, 31 MacKay Hall, Iowa State University, Ames, IA 50011, USA
| | - Lili Li
- Key Laboratory of Automobile Materials, Ministry of Education, and College of Materials Science and Engineering, Jilin University, Changchun 130022, China.
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124
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Qian D, Bai L, Wang YS, Song F, Wang XL, Wang YZ. A Bifunctional Alginate-Based Composite Hydrogel with Synergistic Pollutant Adsorption and Photocatalytic Degradation Performance. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01709] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Dan Qian
- The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Lan Bai
- The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yi-Sha Wang
- The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Fei Song
- The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiu-Li Wang
- The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yu-Zhong Wang
- The Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), State Key Laboratory of Polymer Materials Engineering, College of Chemistry, Sichuan University, Chengdu 610064, China
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125
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Zhou J, Wang T, Xie X. Rationally designed tubular coaxial-electrode copper ionization cells (CECICs) harnessing non-uniform electric field for efficient water disinfection. ENVIRONMENT INTERNATIONAL 2019; 128:30-36. [PMID: 31029977 DOI: 10.1016/j.envint.2019.03.072] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 03/19/2019] [Accepted: 03/29/2019] [Indexed: 06/09/2023]
Abstract
Though well known for its anti-microbial property, copper is usually not considered for drinking water disinfection because of its health risk to human bodies under efficient biocidal concentration. Herein, we have rationally designed and constructed a tubular coaxial-electrode copper ionization cell (CECIC) that enables superior disinfection performance (~6-log removal of E. coli) with a very low effluent copper concentration (~200 μg/L). A non-uniform electric field with enhanced strength near the center electrode is generated in the chamber attributed to the coaxial center-outer electrode configuration. Exposure to the strong electric field subsequently increases the permeability of cell membrane, the excessive uptake of Cu ions into microbes, and thus the reinforced bacteria inactivation. The in-situ ionization results in a Cu ion concentration gradient with higher concentrations in the regions closer to the center. In addition, being driven by the electrophoresis and dielectrophoresis forces, the bacterial cells are transported to the vicinity of the center electrode, where both the electric field strength and Cu ion concentration are higher. These mechanisms in the CECIC synergistically result in the high inactivation efficiency with low Cu concentration in the effluent. The low-cost, high-efficiency, and disinfection-byproduct-free CECIC has shown significant potential in point-of-use applications.
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Affiliation(s)
- Jianfeng Zhou
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Ting Wang
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States
| | - Xing Xie
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, United States.
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126
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Wei K, Cao X, Gu W, Liang P, Huang X, Zhang X. Ni-Induced C-Al 2O 3-Framework ( NiCAF) Supported Core-Multishell Catalysts for Efficient Catalytic Ozonation: A Structure-to-Performance Study. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:6917-6926. [PMID: 31050416 DOI: 10.1021/acs.est.8b07132] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
During catalytic ozonation, Al2O3-supported catalysts usually have stable structures but relatively low surface activity, while carbon-supported catalysts are opposite. To encourage their synergisms, we designed a Ni-induced C-Al2O3-framework (NiCAF) and reinforced it with a Cu-Co bimetal to create an efficient catalyst (CuCo/NiCAF) with a core-multishell structure. The partial graphitization of carbon adjacent to Ni crystals formed a strong out-shell on the catalyst surface. The rate constant for total organic carbon removal of CuCo/NiCAF (0.172 ± 0.018 min-1) was 67% and 310% higher than that of Al2O3-supported catalysts and Al2O3 alone, respectively. The metals on CuCo/NiCAF contributed to surface-mediated reactions during catalytic ozonation, while the embedded carbon enhanced reactions within the solid-liquid boundary layer and in the bulk solution. Moreover, carbon embedment provided a 76% increase in ·OH-production efficiency and an 86% increase in organic-adsorption capacity compared to Al2O3-supported catalysts. During the long-term treatment of coal-gasification wastewater (∼5 m3 day-1), the pilot-scale demonstration of CuCo/NiCAF-catalyzed ozonation revealed a 120% increase in ozone-utilization efficiency (ΔCOD/ΔO3 = 2.12) compared to that of pure ozonation (0.96). These findings highlight catalysts supported on NiCAF as a facile and efficient approach to achieve both high catalytic activity and excellent structural stability, demonstrating that they are highly viable for practical applications.
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Affiliation(s)
- Kajia Wei
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , P. R. China
| | - Xiaoxin Cao
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , P. R. China
| | - Wancong Gu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , P. R. China
| | - Peng Liang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , P. R. China
| | - Xia Huang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , P. R. China
| | - Xiaoyuan Zhang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment , Tsinghua University , Beijing 100084 , P. R. China
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127
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Wu XQ, Shao ZD, Liu Q, Xie Z, Zhao F, Zheng YM. Flexible and porous TiO 2/SiO 2/carbon composite electrospun nanofiber mat with enhanced interfacial charge separation for photocatalytic degradation of organic pollutants in water. J Colloid Interface Sci 2019; 553:156-166. [PMID: 31202052 DOI: 10.1016/j.jcis.2019.06.019] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 05/08/2019] [Accepted: 06/06/2019] [Indexed: 12/20/2022]
Abstract
Semiconductor photocatalysis has long been considered as a promising approach for remediation of polluted water. However, the high recombination rate of electrons and holes, as well as a low reaction rate, have impeded its large-scale applications. Therefore, it is of great importance to develop appropriate photocatalysts for promoting its practical application. In this study, a novel TiO2/SiO2/carbon electrospun nanofiber mat (TSC NFM) with flexibility and porous hierarchy has been successfully designed and fabricated by a facile method of electrospinning and carbonization. Characterization results show that the TSC NFM consists of closely-packed and well-distributed anatase (TiO2) nanocrystals, amorphous SiO2 nanoparticles, and carbon with interconnected meso- and macro-pores. The photocatalytic performance of the TSC NFM was evaluated by degrading rhodamine B and 4-nitrophenol in batch systems. The results show that TSC NFM exhibits a higher photocatalytic activity than TiO2/SiO2 nanofiber mat, which does not contain carbon. The enhanced performance of the TSC NFM can be attributed to the improved adsorption capacity toward the organic pollutants due to the presence of carbon and to the enhanced interfacial charge separation between TiO2 nanoparticles and carbon. Besides, the as-prepared TSC NFM displays good stability and reusability. Notably, the flexible TSC NFM can be used in a continuous-flow reactor to efficiently treat wastewater. Our work provides new insights into the fabrication of carbon-based inorganic nanofiber mats, which have great potential in water treatment.
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Affiliation(s)
- Xiao-Qiong Wu
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; CAS Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China; CSIRO Manufacturing, Private Bag 10, Clayton, Victoria 3168, Australia
| | - Zai-Dong Shao
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; CAS Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Qing Liu
- Fujian Provincial Key Laboratory of Ecology-Toxicological Effects & Control for Emerging Contaminants, College of Environmental and Biological Engineering, Putian University, 1133 Xueyuan Road, Putian 351100, China
| | - Zongli Xie
- CSIRO Manufacturing, Private Bag 10, Clayton, Victoria 3168, Australia
| | - Fei Zhao
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China
| | - Yu-Ming Zheng
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; CAS Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, 1799 Jimei Road, Xiamen 361021, China; University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China.
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128
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Harvesting vapor by hygroscopic acid to create pore: Morphology, crystallinity and performance of poly (ether ether ketone) lithium ion battery separator. J Memb Sci 2019. [DOI: 10.1016/j.memsci.2019.01.045] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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129
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Sarkhosh M, Sadani M, Abtahi M, Azarpira H, Alidadi H, Atafar Z, Rezaei S, Mohseni SM, Vaezi N, Fakhri Y, Keramati H. Photo-biological degradation of Bisphenol A, UV/ZnO/Iodide process at the center of biological reactor. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.01.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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130
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Loeb SK, Alvarez PJJ, Brame JA, Cates EL, Choi W, Crittenden J, Dionysiou DD, Li Q, Li-Puma G, Quan X, Sedlak DL, David Waite T, Westerhoff P, Kim JH. The Technology Horizon for Photocatalytic Water Treatment: Sunrise or Sunset? ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:2937-2947. [PMID: 30576114 DOI: 10.1021/acs.est.8b05041] [Citation(s) in RCA: 232] [Impact Index Per Article: 46.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Advanced oxidation processes via semiconductor photocatalysis for water treatment have been the subject of extensive research over the past three decades, producing many scientific reports focused on elucidating mechanisms and enhancing kinetics for the treatment of contaminants in water. Many of these reports imply that the ultimate goal of the research is to apply photocatalysis in municipal water treatment operations. However, this ignores immense technology transfer problems, perpetuating a widening gap between academic advocation and industrial application. In this Feature, we undertake a critical examination of the trajectory of photocatalytic water treatment research, assessing the viability of proposed applications and identifying those with the most promising future. Several strategies are proposed for scientists and engineers who aim to support research efforts to bring industrially relevant photocatalytic water treatment processes to fruition. Although the reassessed potential may not live up to initial academic hype, an unfavorable assessment in some areas does not preclude the transfer of photocatalysis for water treatment to other niche applications as the technology retains substantive and unique benefits.
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Affiliation(s)
- Stephanie K Loeb
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT) 6100 Main Street, MS 6398 , Houston , Texas 77005 , United States
- Department of Chemical and Environmental Engineering and , Yale University , 17 Hillhouse Avenue , New Haven , Connecticut 06511 , United States
| | - Pedro J J Alvarez
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT) 6100 Main Street, MS 6398 , Houston , Texas 77005 , United States
- Department of Civil and Environmental Engineering , Rice University , 6100 Main Street , Houston , Texas 77005 , United States
| | - Jonathon A Brame
- US Army Engineer Research and Development Center (ERDC) , 3909 Halls Ferry Road , Vicksburg , Mississippi 39180 , United States
| | - Ezra L Cates
- Department of Environmental Engineering and Earth Sciences , Clemson University , 342 Computer Court , Anderson , South Carolina 29625 , United States
| | - Wonyong Choi
- Division of Environmental Science and Engineering , Pohang University of Science and Technology , Pohang 37673 , Korea
| | - John Crittenden
- Brook Byers Institute for Sustainable Systems, School of Civil and Environmental Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
| | - Dionysios D Dionysiou
- Environmental Engineering and Science Program, Department of Chemical and Environmental Engineering, 705 Engineering Research Center , University of Cincinnati , Cincinnati , Ohio 45221-0012 , United States
| | - Qilin Li
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT) 6100 Main Street, MS 6398 , Houston , Texas 77005 , United States
- Department of Civil and Environmental Engineering , Rice University , 6100 Main Street , Houston , Texas 77005 , United States
| | - Gianluca Li-Puma
- Environmental Nanocatalysis & Photoreaction Engineering, Department of Chemical Engineering , Loughborough University , Loughborough , LE11 3TU , United Kingdom
| | - Xie Quan
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology , Dalian University of Technology , Dalian 116024 , China
| | - David L Sedlak
- Department of Civil & Environmental Engineering and Engineering Research Center for Reinventing the Nation's Urban Water Infrastructure (ReNUWIt) , University of California , Berkeley , California 94720 , United States
| | - T David Waite
- School of Civil and Environmental Engineering , University of New South Wales , Sydney New South Wales 2052 , Australia
| | - Paul Westerhoff
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT) 6100 Main Street, MS 6398 , Houston , Texas 77005 , United States
- School of Sustainable Engineering and The Built Environment , Arizona State University , Box 3005, Tempe , Arizona 85287 , United States
| | - Jae-Hong Kim
- Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT) 6100 Main Street, MS 6398 , Houston , Texas 77005 , United States
- Department of Chemical and Environmental Engineering and , Yale University , 17 Hillhouse Avenue , New Haven , Connecticut 06511 , United States
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131
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Ren Y, Li T, Zhang W, Wang S, Shi M, Shan C, Zhang W, Guan X, Lv L, Hua M, Pan B. MIL-PVDF blend ultrafiltration membranes with ultrahigh MOF loading for simultaneous adsorption and catalytic oxidation of methylene blue. JOURNAL OF HAZARDOUS MATERIALS 2019; 365:312-321. [PMID: 30447639 DOI: 10.1016/j.jhazmat.2018.11.013] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 10/22/2018] [Accepted: 11/04/2018] [Indexed: 05/17/2023]
Abstract
Multifunctional ultrafiltration membranes need to be further developed with ultrafiltration performance and high multifunctional decontamination efficiency. Here, the MIL-PVDF multifunctional ultrafiltration membrane with ultrahigh MIL loading was demonstrated by a new blending method of predispersion in acetone and thermally induced phase separation. Due to the improved dispersity and restriction of pore size, the MIL-53(Fe) mass loading was as high as approximately 61%. The new membrane showed high performance for methylene blue (MB) removal and maintained high permeability and ultrafiltration efficiency. The characteristics of the membranes were analyzed to explain the above advantages. Meanwhile, compared to the traditional blend ultrafiltration membrane, the 67-MIL-PVDF membrane showed an 9-fold increase in effective treatment volume for more than 75% MB removal. The contribution and efficiency of adsorption and catalytic oxidation were analyzed and explained. The relationship between them was confirmed as being independent, and the reasons for this independence were proposed. Additionally, the mechanism of multifunctional decontamination and permeability by MIL-PVDF membranes was proposed. Moreover, the 67-MIL-PVDF membrane was also suitable for long-term run and real wastewaters treatment. In conclusion, this study sheds new light on the preparation strategy for multifunctional blend ultrafiltration membranes with ultrahigh particles loading displaying high decontamination and permeability performance.
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Affiliation(s)
- Yi Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Ting Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Weiming Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China; State Environmental Protection Engineering Center for Organic Chemical Wastewater Treatment and Resource Reuse, Nanjing 210046, China.
| | - Shu Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Mengqi Shi
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Chao Shan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China
| | - Wenbin Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China
| | - Xiaohong Guan
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Lu Lv
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China; State Environmental Protection Engineering Center for Organic Chemical Wastewater Treatment and Resource Reuse, Nanjing 210046, China
| | - Ming Hua
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China; State Environmental Protection Engineering Center for Organic Chemical Wastewater Treatment and Resource Reuse, Nanjing 210046, China
| | - Bingcai Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; Research Center for Environmental Nanotechnology (ReCENT), Nanjing University, Nanjing 210023, China; State Environmental Protection Engineering Center for Organic Chemical Wastewater Treatment and Resource Reuse, Nanjing 210046, China
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132
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Piao M, Zou D, Yang Y, Ren X, Qin C, Piao Y. Multi-Functional Laccase Immobilized Hydrogel Microparticles for Efficient Removal of Bisphenol A. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E704. [PMID: 30818844 PMCID: PMC6427804 DOI: 10.3390/ma12050704] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 02/17/2019] [Accepted: 02/22/2019] [Indexed: 12/16/2022]
Abstract
Hghly stable, reusable, and multi-functional biocatalytic microparticles with Laccase (Lac) enzyme (Lac/particles) were synthesized for bisphenol A (BPA) removal from aqueous solution. The Lac/particles were prepared by encapsulating Lac enzymes into poly ethylene glycol (PEG) hydrogel via the UV assisted emulsion polymerization method followed by cross linking with glutaraldehyde (GA). The obtained Lac/particles were spherical and micron sized (137⁻535 μm), presenting high enzyme entrapment efficiency of 100%, high activity recovery of 18.9%, and great stability at various pHs (3⁻7) than the free Lac. The Lac/particles could adsorb the BPA into the catalytic particles in a short time, promoting contact between BPA and enzyme, and further enzymatically degrade them without the shaking process and independent surrounding buffer solution. The Lac/particles could be reused for another round BPA adsorption and biotranformation by maintaining over 90% of BPA removal efficiency after seven times reuse. The synergistic effects of adsorption and biocatalytical reaction of Lac/particles have significant values in high efficient and cost-effective BPA removal.
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Affiliation(s)
- Mingyue Piao
- Key Laboratory of Groundwater Resources and Environment (Jilin University), Ministry of Education, Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun 130021, China.
- College of Environmental Science and Engineering, Jilin Normoal University, 1301 Haifeng Road, Siping 136000, China.
| | - Donglei Zou
- Key Laboratory of Groundwater Resources and Environment (Jilin University), Ministry of Education, Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun 130021, China.
| | - Yuesuo Yang
- Key Laboratory of Groundwater Resources and Environment (Jilin University), Ministry of Education, Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun 130021, China.
- Key Laboratory of Eco-restoration of Regional Contaminated Environment, Ministry of Education, Shenyang University, Shenyang 110044, China.
| | - Xianghao Ren
- Key Laboratory of Urban Storm water System and Water Environment, Ministry of Education, School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China.
| | - Chuanyu Qin
- Key Laboratory of Groundwater Resources and Environment (Jilin University), Ministry of Education, Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun 130021, China.
| | - Yunxian Piao
- Key Laboratory of Groundwater Resources and Environment (Jilin University), Ministry of Education, Jilin Provincial Key Laboratory of Water Resources and Environment, College of New Energy and Environment, Jilin University, Changchun 130021, China.
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133
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Photo-catalytic degradation of triclosan with UV/iodide/ZnO process: Performance, kinetic, degradation pathway, energy consumption and toxicology. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2018.10.041] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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134
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Liu M, Zou D, Ma T, Liu Z, Li Y. Simultaneous efficient adsorption and accelerated photocatalytic degradation of chlortetracycline hydrochloride over novel Fe-based MOGs under visible light irradiation assisted by hydrogen peroxide. Inorg Chem Front 2019. [DOI: 10.1039/c9qi00046a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Two novel porous MOGs were prepared for degrading CTC, and JLUE-MOG-1 exhibited an enhanced performance because of the photo-Fenton synergistic effect.
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Affiliation(s)
- Meijun Liu
- Key Lab of Groundwater Resources and Environment
- Ministry of Education
- Jilin University
- Changchun 130021
- PR China
| | - Donglei Zou
- Key Lab of Groundwater Resources and Environment
- Ministry of Education
- Jilin University
- Changchun 130021
- PR China
| | - Taigang Ma
- Key Lab of Groundwater Resources and Environment
- Ministry of Education
- Jilin University
- Changchun 130021
- PR China
| | - Zhi Liu
- School of Municipal and Environmental Engineering
- Jilin Jianzhu University
- Changchun 130118
- PR China
| | - Yangxue Li
- Key Lab of Groundwater Resources and Environment
- Ministry of Education
- Jilin University
- Changchun 130021
- PR China
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135
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Zhou Z, Liu L, Yuan W. A superhydrophobic poly(lactic acid) electrospun nanofibrous membrane surface-functionalized with TiO2 nanoparticles and methyltrichlorosilane for oil/water separation and dye adsorption. NEW J CHEM 2019. [DOI: 10.1039/c9nj03576a] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A superhydrophobic PLA electrospun nanofibrous membrane surface-functionalized with TiO2 nanoparticles and methyltrichlorosilane can achieve oil/water separation and methylene blue adsorption.
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Affiliation(s)
- Zixuan Zhou
- Shanghai Tenth People's Hospital
- School of Medicine
- School of Materials Science and Engineering
- Tongji University
- Shanghai 201804
| | - Lejing Liu
- Shanghai Tenth People's Hospital
- School of Medicine
- School of Materials Science and Engineering
- Tongji University
- Shanghai 201804
| | - Weizhong Yuan
- Shanghai Tenth People's Hospital
- School of Medicine
- School of Materials Science and Engineering
- Tongji University
- Shanghai 201804
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136
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Abstract
Energy shortage and environmental pollution problems boost in recent years. Photocatalytic technology is one of the most effective ways to produce clean energy—hydrogen and degrade pollutants under moderate conditions and thus attracts considerable attentions. TiO2 is considered one of the best photocatalysts because of its well-behaved photo-corrosion resistance and catalytic activity. However, the traditional TiO2 photocatalyst suffers from limitations of ineffective use of sunlight and rapid carrier recombination rate, which severely suppress its applications in photocatalysis. Surface modification and hybridization of TiO2 has been developed as an effective method to improve its photocatalysis activity. Due to superior physical and chemical properties such as high surface area, suitable bandgap, structural stability and high charge mobility, two-dimensional (2D) material is an ideal modifier composited with TiO2 to achieve enhanced photocatalysis process. In this review, we summarized the preparation methods of 2D material/TiO2 hybrid and drilled down into the role of 2D materials in photocatalysis activities.
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137
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Zhang D, Lee C, Javed H, Yu P, Kim JH, Alvarez PJJ. Easily Recoverable, Micrometer-Sized TiO 2 Hierarchical Spheres Decorated with Cyclodextrin for Enhanced Photocatalytic Degradation of Organic Micropollutants. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:12402-12411. [PMID: 30272446 DOI: 10.1021/acs.est.8b04301] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Micrometer-sized titanium dioxide hierarchical spheres (TiO2-HS) were assembled from nanosheets to address two common limitations of photocatalytic water treatment: (1) inefficiency associated with scavenging of oxidation capacity by nontarget water constituents and (2) energy-intensive separation and recovery of the photocatalyst slurry. These micrometer-sized spheres are amenable to low-energy separation, and over 99% were recaptured from both batch and continuous flow reactors using microfiltration. Using nanosheets as building blocks resulted in a large specific surface area-3 times larger than that of commercially available TiO2 powder (Evonik P25). Anchoring food-grade cyclodextrin onto TiO2-HS (i.e., CD-TiO2-HS) provided hydrophobic cavities to entrap organic contaminants for more effective utilization of photocatalytically generated reactive oxygen species. CD-TiO2-HS removed over 99% of various contaminants with dissimilar hydrophobicity (i.e., bisphenol A, bisphenol S, 2-naphthol, and 2,4-dichlorophenol) within 2 h under a low-intensity UVA input (3.64 × 10-6 einstein/L/s). As with other catalyst (including TiO2 slurry), periodic replacement or replenishment would be needed to maintain high treatment efficiency (e.g., we demonstrate full reactivation through simple reanchoring of CD). Nevertheless, this task would be offset by significant savings in photocatalyst separation. Thus, CD-TiO2-HS is an attractive candidate for photocatalytic water and wastewater treatment of recalcitrant organic pollutants.
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Affiliation(s)
| | - Changgu Lee
- Department of Environmental and Safety Engineering , Ajou University , Suwon , South Korea
| | | | | | - Jae-Hong Kim
- Department of Chemical & Environmental Engineering , Yale University , New Haven , Connecticut 06520 , United States
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138
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Alvarez PJJ, Chan CK, Elimelech M, Halas NJ, Villagrán D. Emerging opportunities for nanotechnology to enhance water security. NATURE NANOTECHNOLOGY 2018; 13:634-641. [PMID: 30082804 DOI: 10.1038/s41565-018-0203-2] [Citation(s) in RCA: 304] [Impact Index Per Article: 50.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Revised: 06/09/2018] [Accepted: 06/15/2018] [Indexed: 05/12/2023]
Abstract
No other resource is as necessary for life as water, and providing it universally in a safe, reliable and affordable manner is one of the greatest challenges of the twenty-first century. Here, we consider new opportunities and approaches for the application of nanotechnology to enhance the efficiency and affordability of water treatment and wastewater reuse. Potential development and implementation barriers are discussed along with research needs to overcome them and enhance water security.
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Affiliation(s)
- Pedro J J Alvarez
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, USA.
| | - Candace K Chan
- Materials Science and Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, USA
| | - Menachem Elimelech
- Department of Chemical and Environmental Engineering, Yale University, New Haven, CT, USA
| | - Naomi J Halas
- Department of Electrical and Computer Engineering, Rice University, Houston, TX, USA
| | - Dino Villagrán
- Department of Chemistry, University of Texas at El Paso, El Paso, TX, USA
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