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Cescon M, Stevanin C, Ardit M, Orlandi M, Martucci A, Chenet T, Pasti L, Caramori S, Cristino V. Solvothermally Grown Oriented WO 3 Nanoflakes for the Photocatalytic Degradation of Pharmaceuticals in a Flow Reactor. NANOMATERIALS (BASEL, SWITZERLAND) 2024; 14:860. [PMID: 38786816 PMCID: PMC11124514 DOI: 10.3390/nano14100860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2024] [Revised: 05/08/2024] [Accepted: 05/14/2024] [Indexed: 05/25/2024]
Abstract
Contamination by pharmaceuticals adversely affects the quality of natural water, causing environmental and health concerns. In this study, target drugs (oxazepam, OZ, 17-α-ethinylestradiol, EE2, and drospirenone, DRO), which have been extensively detected in the effluents of WWTPs over the past decades, were selected. We report here a new photoactive system, operating under visible light, capable of degrading EE2, OZ and DRO in water. The photocatalytic system comprised glass spheres coated with nanostructured, solvothermally treated WO3 that improves the ease of handling of the photocatalyst and allows for the implementation of a continuous flow process. The photocatalytic system based on solvothermal WO3 shows much better results in terms of photocurrent generation and photocatalyst stability with respect to state-of-the-art WO3 nanoparticles. Results herein obtained demonstrate that the proposed flow system is a promising prototype for enhanced contaminant degradation exploiting advanced oxidation processes.
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Affiliation(s)
- Mirco Cescon
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy; (M.C.); (V.C.)
| | - Claudia Stevanin
- Department of Environmental and Prevention Sciences, University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy; (C.S.); (T.C.)
| | - Matteo Ardit
- Department of Geosciences, University of Padova, Via Gradenigo 6, 35131 Padova, Italy;
- Department of Physics and Earth Sciences, University of Ferrara, Via Saragat 1, 44121 Ferrara, Italy;
| | - Michele Orlandi
- Department of Physics, University of Trento, Via Sommarive 14, 38123 Trento, Italy;
| | - Annalisa Martucci
- Department of Physics and Earth Sciences, University of Ferrara, Via Saragat 1, 44121 Ferrara, Italy;
| | - Tatiana Chenet
- Department of Environmental and Prevention Sciences, University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy; (C.S.); (T.C.)
| | - Luisa Pasti
- Department of Environmental and Prevention Sciences, University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy; (C.S.); (T.C.)
| | - Stefano Caramori
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy; (M.C.); (V.C.)
- National Interuniversity Consortium of Materials Science and Technology (INSTM), University of Ferrara Research Unit, 44121 Ferrara, Italy
| | - Vito Cristino
- Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via L. Borsari 46, 44121 Ferrara, Italy; (M.C.); (V.C.)
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2
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Khan J, Sun Y, Han L. A Comprehensive Review on Graphitic Carbon Nitride for Carbon Dioxide Photoreduction. SMALL METHODS 2022; 6:e2201013. [PMID: 36336653 DOI: 10.1002/smtd.202201013] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 09/10/2022] [Indexed: 06/16/2023]
Abstract
Inspired by natural photosynthesis, harnessing the wide range of natural solar energy and utilizing appropriate semiconductor-based catalysts to convert carbon dioxide into beneficial energy species, for example, CO, CH4 , HCOOH, and CH3 COH have been shown to be a sustainable and more environmentally friendly approach. Graphitic carbon nitride (g-C3 N4 ) has been regarded as a highly effective photocatalyst for the CO2 reduction reaction, owing to its cost-effectiveness, high thermal and chemical stability, visible light absorption capability, and low toxicity. However, weaker electrical conductivity, fast recombination rate, smaller visible light absorption window, and reduced surface area make this catalytic material unsuitable for commercial photocatalytic applications. Therefore, certain procedures, including elemental doping, structural modulation, functional group adjustment of g-C3 N4 , the addition of metal complex motif, and others, may be used to improve its photocatalytic activity towards effective CO2 reduction. This review has investigated the scientific community's perspectives on synthetic pathways and material optimization approaches used to increase the selectivity and efficiency of the g-C3 N4 -based hybrid structures, as well as their benefits and drawbacks on photocatalytic CO2 reduction. Finally, the review concludes a comparative discussion and presents a promising picture of the future scope of the improvements.
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Affiliation(s)
- Javid Khan
- College of Materials Science and Engineering, Hunan Joint International Laboratory of Adv. Mater. and Technology for Clean Energy, Hunan University, Changsha, 410082, China
| | - Yanyan Sun
- School of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, China
| | - Lei Han
- College of Materials Science and Engineering, Hunan Joint International Laboratory of Adv. Mater. and Technology for Clean Energy, Hunan University, Changsha, 410082, China
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3
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Long L, Xu K, Bing Tan K, Cai D, Yang Y, Zhou SF, Zhan G. Highly Active Mn-Cu Bimetallic Oxide Catalyst Assembled as 3D-printed Monolithic Agitating Paddles for Advanced Oxidation Process. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.118278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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4
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Review on Support Materials Used for Immobilization of Nano-Photocatalysts for Water Treatment Applications. Inorganica Chim Acta 2022. [DOI: 10.1016/j.ica.2022.121284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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5
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Saidulu D, Srivastava A, Gupta AK. Enhancement of wastewater treatment performance using 3D printed structures: A major focus on material composition, performance, challenges, and sustainable assessment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 306:114461. [PMID: 35032942 DOI: 10.1016/j.jenvman.2022.114461] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Revised: 12/27/2021] [Accepted: 01/04/2022] [Indexed: 06/14/2023]
Abstract
In order to enhance the performance and sustainability of wastewater treatment technologies, researchers are showing keen interest in the development of novel materials which can overcome the drawbacks associated with conventional materials. In this context, 3D printing gained significant attention due to its capability of fabricating complex geometrics using different material compositions. The present review focuses on recent advancements of 3D printing applications in various physicochemical and biological wastewater treatment techniques. In physicochemical treatment methods, substantial research has been aimed at fabricating feed spacers and other membrane parts, photocatalytic feed spacers, catalysts, scaffolds, monoliths, and capsules. Several advantages, such as membrane fouling mitigation, enhanced degradation efficiency, and recovery and reusability potential, have been associated with the aforementioned 3D printed materials. While in biofilm-based biological treatment methods, the use of 3D printed bio-carriers has led to enhanced mass transfer efficiency and microbial activities. Moreover, the application of these bio-carriers has shown better removal efficiency of chemical oxygen demand (∼90%), total nitrogen (∼73%), ammonia nitrogen (95%), and total phosphorous (∼100%). Although the removal efficiencies were comparable with conventional carriers, 3D printed carriers led to ∼40% reduction in hydraulic retention time, which could significantly save capital and operational expenditures. This review also emphasizes the challenges and sustainability aspects of 3D printing technology and outlines future recommendations which could be vital for further research in this field.
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Affiliation(s)
- Duduku Saidulu
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Ashish Srivastava
- School of Environmental Science and Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Ashok Kumar Gupta
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
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6
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Gordeev EG, Erokhin KS, Kobelev AD, Burykina JV, Novikov PV, Ananikov VP. Exploring metallic and plastic 3D printed photochemical reactors for customizing chemical synthesis. Sci Rep 2022; 12:3780. [PMID: 35260601 PMCID: PMC8904794 DOI: 10.1038/s41598-022-07583-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2022] [Accepted: 02/21/2022] [Indexed: 12/04/2022] Open
Abstract
Visible light photocatalysis is a rapidly developing branch of chemical synthesis with outstanding sustainable potential and improved reaction design. However, the challenge is that many particular chemical reactions may require dedicated tuned photoreactors to achieve maximal efficiency. This is a critical stumbling block unless the possibility for reactor design becomes available directly in the laboratories. In this work, customized laboratory photoreactors were developed with temperature stabilization and the ability to adapt different LED light sources of various wavelengths. We explore two important concepts for the design of photoreactors: reactors for performing multiple parallel experiments and reactors suitable for scale-up synthesis, allowing a rapid increase in the product amount. Reactors of the first type were efficiently made of metal using metal laser sintering, and reactors of the second type were successfully manufactured from plastic using fused filament fabrication. Practical evaluation has shown good accuracy of the temperature stabilization in the range typically required for organic synthesis for both types of reactors. Synthetic application of 3D printed reactors has shown good utility in test reactions-furan C-H arylation and thiol-yne coupling. The critical effect of temperature stabilization was established for the furan arylation reaction: heating of the reaction mixture may lead to the total vanishing of photochemical effect.
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Affiliation(s)
- Evgeniy G Gordeev
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, Russia, 119991
| | - Kirill S Erokhin
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, Russia, 119991
| | - Andrey D Kobelev
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, Russia, 119991
- Lomonosov Moscow State University, Leninskie Gory GSP-1, 1-3, Moscow, Russia, 119991
| | - Julia V Burykina
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, Russia, 119991
| | - Pavel V Novikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, Russia, 119991
| | - Valentine P Ananikov
- Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, Russia, 119991.
- Lomonosov Moscow State University, Leninskie Gory GSP-1, 1-3, Moscow, Russia, 119991.
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7
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Gupta B, Gupta AK. Photocatalytic performance of 3D engineered chitosan hydrogels embedded with sulfur-doped C 3N 4/ZnO nanoparticles for Ciprofloxacin removal: Degradation and mechanistic pathways. Int J Biol Macromol 2022; 198:87-100. [PMID: 34968537 DOI: 10.1016/j.ijbiomac.2021.12.120] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Revised: 11/28/2021] [Accepted: 12/19/2021] [Indexed: 12/17/2022]
Abstract
Ciprofloxacin, a biotoxic micropollutant, is ubiquitously found in the water environment, which is a global concern. This study developed polymeric S-C3N4/ZnO-Chitosan (indexed as SCZ-CH) hydrogels for degrading Ciprofloxacin. The SCZ-CH hydrogels provided the Ciprofloxacin degradation efficiencies of ~93% and ~69% in UV and visible lights, respectively, at optimum conditions (SCZ-CH hydrogels with 2 g/L SCZ, 20 mg/L initial concentration, pH 5, and room temperature). In addition, immobilized SCZ-CH hydrogels structures enable easy separation of the SCZ catalyst from water. The spectroscopic and microscopic analyses of SCZ-CH hydrogels show multifaceted properties, like high oxygen concentrations, crystallinity, stacked structure, high roughness, and improved bandgap energy, which are responsible for the enhanced photocatalytic activity. The effects of water matrix and experimental conditions on Ciprofloxacin degradation were also studied, which suggested that the catalyst dose and solution pH have significant effects on photocatalytic activity. SCZ-CH hydrogels have shown good mineralization efficiency (~98%) and reusability (up to 10 cycles) for Ciprofloxacin removal. Superoxide radicals played an essential role in the degradation of Ciprofloxacin. The Ciprofloxacin molecules get degraded by driving radicals through oxidation, defluorination, substitution, and breaking of the rings. The proposed SCZ-CH hydrogels can be effectively used at a large scale to treat micropollutants.
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Affiliation(s)
- Bramha Gupta
- School of Water Resources, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Ashok Kumar Gupta
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India.
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8
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Martín-Sómer M, Moreno-SanSegundo J, Álvarez-Fernández C, van Grieken R, Marugán J. High-performance low-cost solar collectors for water treatment fabricated with recycled materials, open-source hardware and 3d-printing technologies. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 784:147119. [PMID: 33905935 DOI: 10.1016/j.scitotenv.2021.147119] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 04/07/2021] [Accepted: 04/09/2021] [Indexed: 06/12/2023]
Abstract
Solar technologies constitute an excellent alternative for water treatment in low-income countries where the poverty of a large part of the population hinders their access to safe water. From a technical point of view, the use of compound parabolic collectors (CPC) has been consolidated in the last decades. However, the relatively high cost of tooling conventional manufacturing processes for these collectors makes them difficult to afford in the most impoverished regions. This work presents the development of low-cost CPC and parabolic through solar collectors (PTC) by 3D printing of the structure and the use of recycled reflective materials. Besides, open-source hardware has been used to control system operation, including a supplementary UV LED system to compensate for the operation under low solar irradiance. Regarding the tested reflective materials, an optimum is obtained using an aluminium adhesive sheet that leads to an efficiency of 80% compared to a commercial CPC made of high-quality anodised aluminium, being the cost 20 times lower. On the other hand, incorporating a low-cost solar tracking system in a printed PTC reactor could lead to efficiencies up to 300% compared to the commercial CPC, while the cost was 4.5 times lower. Finally, the LED compensation system was successfully validated, allowing the operation with a constant treatment capacity during operation in cloudy conditions. In conclusion, the developed collectors are high-performance solar water treatment systems with a significantly lower investment cost, making them affordable worldwide.
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Affiliation(s)
- Miguel Martín-Sómer
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain
| | - Jose Moreno-SanSegundo
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain
| | - Carmen Álvarez-Fernández
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain
| | - Rafael van Grieken
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain
| | - Javier Marugán
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, C/ Tulipán s/n, 28933 Móstoles, Madrid, Spain..
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9
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Alimi OA, Meijboom R. Current and future trends of additive manufacturing for chemistry applications: a review. JOURNAL OF MATERIALS SCIENCE 2021; 56:16824-16850. [PMID: 34413542 PMCID: PMC8363067 DOI: 10.1007/s10853-021-06362-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 07/17/2021] [Indexed: 06/13/2023]
Abstract
Three-dimensional (3-D) printing, also known as additive manufacturing, refers to a method used to generate a physical object by joining materials in a layer-by-layer process from a three-dimensional virtual model. 3-D printing technology has been traditionally employed in rapid prototyping, engineering, and industrial design. More recently, new applications continue to emerge; this is because of its exceptional advantage and flexibility over the traditional manufacturing process. Unlike other conventional manufacturing methods, which are fundamentally subtractive, 3-D printing is additive and, therefore, produces less waste. This review comprehensively summarises the application of additive manufacturing technologies in chemistry, chemical synthesis, and catalysis with particular attention to the production of general laboratory hardware, analytical facilities, reaction devices, and catalytically active substances. It also focuses on new and upcoming applications such as digital chemical synthesis, automation, and robotics in a synthetic environment. While discussing the contribution of this research area in the last decade, the current, future, and economic opportunities of additive manufacturing in chemical research and material development were fully covered.
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Affiliation(s)
- Oyekunle Azeez Alimi
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, Auckland Park, P.O. Box 524, Johannesburg, 2006 South Africa
| | - Reinout Meijboom
- Research Centre for Synthesis and Catalysis, Department of Chemical Sciences, University of Johannesburg, Auckland Park, P.O. Box 524, Johannesburg, 2006 South Africa
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10
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Fu GB, Xie R, Qin JW, Deng XB, Ju XJ, Wang W, Liu Z, Chu LY. Facile Fabrication of Photocatalyst-Immobilized Gel Beads with Interconnected Macropores for the Efficient Removal of Pollutants in Water. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c00971] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Guo-Bao Fu
- School of Chemical Engineering, Sichuan University, Chengdu 610065 Sichuan, China
| | - Rui Xie
- School of Chemical Engineering, Sichuan University, Chengdu 610065 Sichuan, China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065 Sichuan, China
| | - Jia-Wang Qin
- School of Chemical Engineering, Sichuan University, Chengdu 610065 Sichuan, China
| | - Xi-Bin Deng
- School of Chemical Engineering, Sichuan University, Chengdu 610065 Sichuan, China
| | - Xiao-Jie Ju
- School of Chemical Engineering, Sichuan University, Chengdu 610065 Sichuan, China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065 Sichuan, China
| | - Wei Wang
- School of Chemical Engineering, Sichuan University, Chengdu 610065 Sichuan, China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065 Sichuan, China
| | - Zhuang Liu
- School of Chemical Engineering, Sichuan University, Chengdu 610065 Sichuan, China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065 Sichuan, China
| | - Liang-Yin Chu
- School of Chemical Engineering, Sichuan University, Chengdu 610065 Sichuan, China
- State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065 Sichuan, China
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11
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Xu S, Xiao G, Wang Z, Wang Y, Liu Z, Su H. A reusable chitosan/TiO 2@g-C 3N 4 nanocomposite membrane for photocatalytic removal of multiple toxic water pollutants under visible light. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 83:3063-3074. [PMID: 34185700 DOI: 10.2166/wst.2021.188] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Photocatalysis has been proved to be a promising approach in wastewater purification. However, it is hard to recycle powdery photocatalysts from wastewater in industry, but immobilizing them using larger materials can overcome this drawback. For that reason, TiO2@g-C3N4 was embedded into chitosan to synthesize a highly reusable and visible-light-driven chitosan/TiO2@g-C3N4 nanocomposite membrane (CTGM). CTGM showed enhanced photoactivity and the photocatalytic efficiencies of the toxic water pollutants methyl orange (M.O.), rhodamine B (Rh.B), chromium (VI) (Cr (VI)), 2,4-dichlorophenol (2,4-DCP) and atrazine (ATZ) were more than 90% under visible light at ambient conditions. Significantly, CTGM was easy to recycle and showed excellent reusability: there was no decrease in the photocatalytic decolorization efficiency of Rh.B throughout 10 cycles. A continuous-flow photocatalysis system was set up and 90% of Rh.B was effectively decolorized. A simple approach was developed to prepare a novel, effective and visible-light-driven membrane that was easy to reuse, and a feasible photocatalysis continuous-flow system was designed to be a reference for wastewater treatment in industry.
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Affiliation(s)
- Shengnan Xu
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Gang Xiao
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Zishuai Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Yaoqiang Wang
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Ziwei Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
| | - Haijia Su
- State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing Key Laboratory of Bioprocess, Beijing University of Chemical Technology, Beijing 100029, China E-mail:
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12
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The Influence of Photocatalytic Reactors Design and Operating Parameters on the Wastewater Organic Pollutants Removal—A Mini-Review. Catalysts 2021. [DOI: 10.3390/catal11050556] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The organic pollutants removal by conventional methods (adsorption, coagulation, filtration, microorganism and enzymes) showed important limitation due to the reluctance of these molecules. An alternative to this issue is represented by the photocatalytic technology considered as an advanced oxidation process (AOP). The photoreactors design and concepts vary based on the working regime (static or dynamic), photocatalyst morphology (powders or bulk) and volume. This mini-review aims to provide specific guidelines on the correlations between the photoreactor concept characteristics (working regime, volume and flow rate), irradiation scenarios (light spectra, irradiation period and intensity) and the photocatalytic process parameters (photocatalyst materials and dosage, pollutant type and concentration, pollutant removal efficiency and constant rate). The paper considers two main photoreactor geometries (cylindrical and rectangular) and analyses the influence of parameters optimization on the overall photocatalytic efficiency. Based on the systematic evaluation of the input data reported in the scientific papers, several perspectives regarding the photocatalytic reactors’ optimization were included.
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13
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Shen H, Durkin DP, Aiello A, Diba T, Lafleur J, Zara JM, Shen Y, Shuai D. Photocatalytic graphitic carbon nitride-chitosan composites for pathogenic biofilm control under visible light irradiation. JOURNAL OF HAZARDOUS MATERIALS 2021; 408:124890. [PMID: 33370693 DOI: 10.1016/j.jhazmat.2020.124890] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 12/05/2020] [Accepted: 12/15/2020] [Indexed: 06/12/2023]
Abstract
Photocatalysis holds promise for inactivating environmental pathogens. Visible-light-responsive composites of carbon-doped graphitic carbon nitride and chitosan with high reactivity and processability were fabricated, and they can control pathogenic biofilms for environmental, food, biomedical, and building applications. The broad-spectrum biofilm inhibition and eradication of the photocatalytic composites against Staphylococcus epidermidis, Pseudomonas aeruginosa PAO1, and Escherichia coli O157: H7 under visible light irradiation were demonstrated. Extracellular polymeric substances in Escherichia coli O157: H7 biofilms were most resistant to photocatalytic oxidation, which led to reduced performance for biofilm removal. 1O2 produced by the composites was believed to dominate biofilm inactivation. Moreover, the composites exhibited excellent performance for inhibiting biofilm development in urine, highlighting the promise for inactivating environmental biofilms developed from multiple bacterial species. Our study provides fundamental insights into the development of new photocatalytic composites, and elucidates the mechanism of how the photocatalyst reacts with a microbiological system.
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Affiliation(s)
- Hongchen Shen
- Department of Civil and Environmental Engineering, The George Washington University, Washington, DC, 20052 USA
| | - David P Durkin
- Department of Chemistry, United States Naval Academy, Annapolis, MD, 21402 US
| | - Ashlee Aiello
- Department of Chemistry, United States Naval Academy, Annapolis, MD, 21402 US
| | - Tara Diba
- Department of Biomedical Engineering, The George Washington University, Washington, DC, 20052 USA
| | - John Lafleur
- Department of Emergency Medicine, George Washington University School of Medicine, Washington, DC, 20037 USA
| | - Jason M Zara
- Department of Biomedical Engineering, The George Washington University, Washington, DC, 20052 USA
| | - Yun Shen
- Department of Chemical and Environmental Engineering, University of California, Riverside, CA, 92521 USA.
| | - Danmeng Shuai
- Department of Civil and Environmental Engineering, The George Washington University, Washington, DC, 20052 USA.
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14
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Li K, Ma S, Xu S, Fu H, Li Z, Li Y, Liu S, Du J. The mechanism changes during bisphenol A degradation in three iron functionalized biochar/peroxymonosulfate systems: The crucial roles of iron contents and graphitized carbon layers. JOURNAL OF HAZARDOUS MATERIALS 2021; 404:124145. [PMID: 33032089 DOI: 10.1016/j.jhazmat.2020.124145] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/27/2020] [Accepted: 09/28/2020] [Indexed: 06/11/2023]
Abstract
Three magnetic biochar nanocomposites named as C800-1, C800-2 and C800-3 with increased iron deposition amount, decreased graphitized degree and gradually destroyed graphitized carbon layers, respectively, were prepared using potassium ferrate as activator and corn straw as biomass. C800-1, C800-2 and C800-3 exhibited much different bisphenol A degradation effect in presence of peroxymonosulfate among which C800-3 owned the best catalytic performance. For the degradation mechanism, the dominant role of electron transfer pathway was gradually replaced by the SO4•- pathway with the increase of iron amount and the destruction of graphitized carbon layers. This work would provide a simple and feasible method, namely changing the ratio of potassium ferrate and biochar, to manipulate the radical and nonradical degradation pathway in PMS-based organic wastewater purification.
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Affiliation(s)
- Kai Li
- College of Resources and Environmental Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Shuanglong Ma
- College of Resources and Environmental Sciences, Henan Agricultural University, Zhengzhou 450002, China.
| | - Shengjun Xu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuangqing Road, Haidian District, Beijing 100085, China
| | - Haichao Fu
- College of Resources and Environmental Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Zhuoqian Li
- College of Resources and Environmental Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Yi Li
- College of Resources and Environmental Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Shiliang Liu
- College of Resources and Environmental Sciences, Henan Agricultural University, Zhengzhou 450002, China
| | - Jinge Du
- School of Environment, Henan Normal University, Xinxiang 453007, China
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Mallakpour S, Sirous F, Hussain CM. Current achievements in 3D bioprinting technology of chitosan and its hybrids. NEW J CHEM 2021. [DOI: 10.1039/d1nj01497h] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Chitosan and its hybrids, as an appropriate bioink in 3D printing technology, for the fabrication of engineered constructions.
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Affiliation(s)
- Shadpour Mallakpour
- Organic Polymer Chemistry Research Laboratory
- Department of Chemistry
- Isfahan University of Technology
- Isfahan
- Islamic Republic of Iran
| | - Fariba Sirous
- Organic Polymer Chemistry Research Laboratory
- Department of Chemistry
- Isfahan University of Technology
- Isfahan
- Islamic Republic of Iran
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