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Zhang H, Cao Y, Wang S, Tang Y, Tian L, Cai W, Wei Z, Wu Z, Zhu Y, Guo Q. Photocatalytic removal of ammonia nitrogen from water: investigations and challenges for enhanced activity. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:41824-41843. [PMID: 38862798 DOI: 10.1007/s11356-024-33891-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2023] [Accepted: 05/30/2024] [Indexed: 06/13/2024]
Abstract
Ammonia nitrogen (NH3-N/NH4+-N) serves as a crucial chemical in biochemistry and fertilizer synthesis. However, it is also a toxic compound, posing risks from eutrophication to direct threats to human health. Ammonia nitrogen pollution pervades water sources, presenting a significant challenge. While several water treatment technologies exist, biological treatment, though widely used, has its limitations. Hence, green and efficient photocatalytic technology emerges as a promising solution. However, current monolithic semiconductor photocatalysts prove inadequate in controlling ammonia nitrogen pollution. Therefore, this review focuses on enhancing semiconductor photocatalysts' efficiency through modification, discussing four mechanisms: (1) mono-ionic modification; (2) metallic and non-metallic modification; (3) construct heterojunctions; and (4) enhancement of synergistic effects of multiple technologies. The influencing factors of photocatalytic ammonia nitrogen removal efficiency are also explored. Moreover, the review outlines the limitations of current photocatalytic pollution treatment and discusses future development trends and research challenges. Currently, the main products of ammonia nitrogen removal include NO3-, NO2-, and N2. To mitigate secondary pollution, the green process of converting ammonia nitrogen to N2 using photocatalysis emerges as a fundamental approach for future treatment. Overall, this review aims to deepen understanding of photocatalysis in ammonia nitrogen treatment and guide researchers toward widespread implementation of this endeavor.
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Affiliation(s)
- Huining Zhang
- School of Civil Engineering, Lanzhou University of Technology, Langongping Road 287, Qilihe District, Lanzhou, 730050, China.
- Institute of Nanomaterials Application Technology, Gansu Academy of Sciences, Lanzhou, 730030, China.
| | - Yang Cao
- School of Civil Engineering, Lanzhou University of Technology, Langongping Road 287, Qilihe District, Lanzhou, 730050, China
| | - Shaofeng Wang
- School of Civil Engineering, Lanzhou University of Technology, Langongping Road 287, Qilihe District, Lanzhou, 730050, China
| | - Yuling Tang
- School of Civil Engineering, Lanzhou University of Technology, Langongping Road 287, Qilihe District, Lanzhou, 730050, China
| | - Lihong Tian
- School of Civil Engineering, Lanzhou University of Technology, Langongping Road 287, Qilihe District, Lanzhou, 730050, China
| | - Wenrui Cai
- School of Civil Engineering, Lanzhou University of Technology, Langongping Road 287, Qilihe District, Lanzhou, 730050, China
| | - Zhiqiang Wei
- School of Civil Engineering, Lanzhou University of Technology, Langongping Road 287, Qilihe District, Lanzhou, 730050, China
| | - Zhiguo Wu
- Institute of Nanomaterials Application Technology, Gansu Academy of Sciences, Lanzhou, 730030, China
| | - Ying Zhu
- Institute of Biology, Gansu Academy of Sciences, Lanzhou, 730030, China
| | - Qi Guo
- Institute of Biology, Gansu Academy of Sciences, Lanzhou, 730030, China
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Mugwili ME, Waanders FB, Masindi V, Fosso-Kankeu E. An update on sustainabilities and challenges on the removal of ammonia from aqueous solutions: A state-of-the-art review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 347:119172. [PMID: 37793297 DOI: 10.1016/j.jenvman.2023.119172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 09/11/2023] [Accepted: 09/28/2023] [Indexed: 10/06/2023]
Abstract
An insightful attempt has been made in this review and the primary objective was to meticulously provide an update on the sustainabilities, advances and challenges pertaining the removal of ammonia from water and wastewater. Specifically, ammonia is a versatile compound that prevails in various spheres of the environment, and if not properly managed, this chemical species could pose severe ecological pressure and toxicity to different receiving environments and its biota. The notorious footprints of ammonia could be traced to anoxic conditions, an infestation of aquatic ecosystems, hyperactivity, convulsion, and methaemoglobin, popularly known as the "blue baby syndrome". In this review, latest updates regarding the sustainabilities, advancements and challenges for the removal of ammonia from aqueous solutions, i.e., river and waste waters, are briefly elucidated in light of future perspectives. Viable routes and ideal hotspots, i.e., wastewater and drinking water, for ammonia removal under the cost-effective options have been unpacked. Key mechanisms for the removal of ammonia were grossly bioremediation, oxidation, adsorption, filtration, precipitation, and ion exchange. Finally, this review denoted biological nutrient removal, struvite precipitation, and breakpoint chlorination as the most effective and promising technologies for the removal of ammonia from aquatic environments, although at the expense of energy and operational cost. Lastly, the future perspective, avenues of exploitation, and technical facets that deserve in-depth exploration are duly underscored.
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Affiliation(s)
- Muyahavho Enemiah Mugwili
- Water Pollution Monitoring and Remediation Initiatives Research Group, School of Chemical and Minerals Engineering, North-West University, Potchefstroom, 2531, South Africa; Magalies Water, Scientific Services, Research & Development Division, Erf 3475, Stoffberg Street, Brits, 0250, South Africa
| | - Frans Boudewijn Waanders
- Water Pollution Monitoring and Remediation Initiatives Research Group, School of Chemical and Minerals Engineering, North-West University, Potchefstroom, 2531, South Africa
| | - Vhahangwele Masindi
- Magalies Water, Scientific Services, Research & Development Division, Erf 3475, Stoffberg Street, Brits, 0250, South Africa; Department of Environmental Sciences, College of Agriculture and Environmental Sciences, University of South Africa (UNISA), P. O. Box 392, Florida, 1710, South Africa.
| | - Elvis Fosso-Kankeu
- Water Pollution Monitoring and Remediation Initiatives Research Group, School of Chemical and Minerals Engineering, North-West University, Potchefstroom, 2531, South Africa; Institute for Nanotechnology and Water Sustainability (iNanoWS), College of Science Engineering and Technology (CSET), University of South Africa, Florida Science Campus, South Africa; Department of Mining Engineering, College of Science Engineering and Technology, University of South Africa, Florida Science Campus, South Africa
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Wang L, Fu W, Sun S, Liu H, Wang J, Zhong W, Ma B. Preparation, characterization, and removal of nitrate from water using vacant polyoxometalate/TiO 2 composites. ENVIRONMENTAL TECHNOLOGY 2023; 44:3393-3404. [PMID: 35324393 DOI: 10.1080/09593330.2022.2058424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
Due to the rapid development of industry and agriculture, nitrate pollution in groundwater has been continuously increasing. NO3-N is a chemically stable nitrogen species and is quite difficult to remove. In this study, using heteropoly silicotungstate K8[α-SiW11O39] and Cu2+ as the active components, SiW11 and Cu2+ were loaded onto TiO2 by a sol-gel method to prepare a composite photocatalyst SiW11/TiO2/Cu. The photocatalytic reduction of dissolved NO3-N was subsequently performed using SiW11/TiO2/Cu under UV irradiation, and the influence of different experimental parameters on the photocatalytic performance was investigated. The mechanism of NO3-N reduction by the composite catalyst was also investigated. Free radicals existing within the system were detected by ESR spectroscopy, and the results indicated that C O 2 - anion free-radicals were generated by the reaction of photogenerated holes and formic acid (HCOOH). At a SiW11/TiO2/Cu dose of 1.2 g L-1 and in the presence of HCOOH as a hole scavenger, the proposed composite catalytically reduced NO3-N anddemonstrated significantadvantages in terms of its photocatalytic activity in comparison with pure TiO2. In particular, the removal efficiency of NO3-N and the selectivity of nitrogen achieved a maximum of 96% and 77%, respectively.
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Affiliation(s)
- Lingsheng Wang
- College of Resources and Environment, Shandong Agricultural University, Taian, People's Republic of China
| | - Weizhang Fu
- College of Resources and Environment, Shandong Agricultural University, Taian, People's Republic of China
| | - Shujuan Sun
- College of Resources and Environment, Shandong Agricultural University, Taian, People's Republic of China
| | - Huaihao Liu
- College of Resources and Environment, Shandong Agricultural University, Taian, People's Republic of China
| | - Jinhua Wang
- College of Resources and Environment, Shandong Agricultural University, Taian, People's Republic of China
| | - Wanzhen Zhong
- College of Resources and Environment, Shandong Agricultural University, Taian, People's Republic of China
| | - Bin Ma
- Tai'an City Management Comprehensive Service Center, Taian, People's Republic of China
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Liu N, Sun Z, Zhang H, Klausen LH, Moonhee R, Kang S. Emerging high-ammonia‑nitrogen wastewater remediation by biological treatment and photocatalysis techniques. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 875:162603. [PMID: 36871738 DOI: 10.1016/j.scitotenv.2023.162603] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 02/21/2023] [Accepted: 02/28/2023] [Indexed: 06/18/2023]
Abstract
The bacterial and photocatalysis techniques have been widely applied into the remediation of ammonia nitrogen wastewater. Although traditional microbial methods had been verified useful; more efficient, energy-saving and controllable candidate treatment methods are still urgently needed to cover the increasingly diverse ammonia nitrogen pollution cases. The bacterial treatment technique for ammonia nitrogen mainly depends on the ammonia nitrogen oxidation-reduction (e.g. nitrification, denitrification) by nitrifying bacteria and denitrifying bacteria, but these reactions suffer from slow denitrifying kinetic process and uncontrolled disproportionation reaction. In comparison, the photocatalysis technique based on photoelectrons is more efficient and has some advantages, such as low temperature reaction and long life, while the photocatalysis technique can not perform multiple complex biochemical reactions. Despite much scientific knowledge obtained about this issue recently, such research has yet not been widely adopted in the industry because of many concerns about subsequent catalyst stability and economic feasibility. This review summarized and discussed the very recent achievements and key problems on remediation of high-ammonia‑nitrogen wastewater and oxidation driven by bacterial treatment and photocatalysis techniques, as well as the most promising future directions for these two techniques, especially the potential of jointly bacterial-photocatalysis techniques.
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Affiliation(s)
- Nian Liu
- Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, 200093 Shanghai, PR China; Institute of Photochemistry and Photocatalysts, University of Shanghai for Science and Technology, 200093 Shanghai, PR China
| | - Zhen Sun
- East China Sea Fisheries Research Institute, Chinese Academy of Fisheries Sciences, 200090 Shanghai, PR China
| | - Huan Zhang
- Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, 200093 Shanghai, PR China; Institute of Photochemistry and Photocatalysts, University of Shanghai for Science and Technology, 200093 Shanghai, PR China
| | | | - Ryu Moonhee
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan 570-752, Republic of Korea
| | - Shifei Kang
- Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, 200093 Shanghai, PR China; Institute of Photochemistry and Photocatalysts, University of Shanghai for Science and Technology, 200093 Shanghai, PR China.
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Jiang P, Zhou T, Bai J, Zhang Y, Li J, Zhou C, Zhou B. Nitrogen-containing wastewater fuel cells for total nitrogen removal and energy recovery based on Cl•/ClO• oxidation of ammonia nitrogen. WATER RESEARCH 2023; 235:119914. [PMID: 37028212 DOI: 10.1016/j.watres.2023.119914] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 06/19/2023]
Abstract
The excess nitrogen discharge into water bodies has resulted in extensive water pollution and human health risks, which has become a critical global issue. Moreover, nitrogenous wastewater contains considerable chemical energy contributed by organic pollutants and nitrogenous compounds. Therefore, the treatment of various kinds of nitrogen-containing wastewater for nitrogen removal and energy recovery is of significance. Biological methode and advanced oxidation processes (AOPs) are the main methods for nitrogen removal. However, biological treatment is easily inhibited by high-salinity, high ammonia nitrogen (NH3-N/NH4+-N), nitrite and toxic organics in wastewater, which limits its application. AOPs mainly induce in situ generation of highly reactive species, such as hydroxyl radical (HO•), sulfate radical (SO4•-) and chlorine radicals (Cl•, ClO•, Cl2•-), for nitrogen removal. Nevertheless, HO• shows low reactivity and N2 selectivity towards NH3-N/NH4+-N oxidation, and SO4•- also demonstrates unsatisfactory NH3-N/NH4+-N removal. It has been shown that Cl•/ClO• can efficiently remove NH3-N/NH4+-N with high N2 selectivity. The generation of Cl•/ClO• can be triggered by various techniques, among which the PEC technique shows great potential due to its higher efficiency for Cl•/ClO• generation and eco-friendly approach for pollutants degradation and energy recovery by utilizing solar energy. Cl•/ClO• oxidation of NH3-N/NH4+-N and nitrate nitrogen (NO3--N) reduction can be strengthened through the design of photoanode and cathode materials, respectively. Coupling with this two pathways, an exhaustive total nitrogen (TN) removal system is designed for complete TN removal. When introducing the mechanism into photocatalytic fuel cells (PFCs), the concept of nitrogen-containing wastewater fuel cells (NFCs) is proposed to treat several typical types of nitrogen-containing wastewater, achieving high-efficiency TN removal, organics degradation, toxic chlorate control, and energy recovery simultaneously. Recent research progress in this field is reviewed, summarized and discussed, and in-depth perspectives are proposed, providing new ideas for the resource treatment of nitrogen-containing wastewater.
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Affiliation(s)
- Panyu Jiang
- School of Environmental Science and Engineering, Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, No. 800 Dongchuan Rd., Shanghai 200240, PR China
| | - Tingsheng Zhou
- School of Environmental Science and Engineering, Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, No. 800 Dongchuan Rd., Shanghai 200240, PR China.
| | - Jing Bai
- School of Environmental Science and Engineering, Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, No. 800 Dongchuan Rd., Shanghai 200240, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China
| | - Yan Zhang
- School of Environmental Science and Engineering, Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, No. 800 Dongchuan Rd., Shanghai 200240, PR China
| | - Jinhua Li
- School of Environmental Science and Engineering, Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, No. 800 Dongchuan Rd., Shanghai 200240, PR China
| | - Changhui Zhou
- School of Environmental Science and Engineering, Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, No. 800 Dongchuan Rd., Shanghai 200240, PR China
| | - Baoxue Zhou
- School of Environmental Science and Engineering, Laboratory of Thin Film and Microfabrication Technology (Ministry of Education), Shanghai Jiao Tong University, No. 800 Dongchuan Rd., Shanghai 200240, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai 200092, PR China.
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Ye S, Xiao H, Chen J, Zhang D, Qi L, Peng T, Gao Y, Zhang Q, Qu J, Wang L, Liu R. Copperphosphotungstate Doped Polyanilines Nanorods for GSH-Depletion Enhanced Chemodynamic/NIR-II Photothermal Synergistic Therapy. Int J Nanomedicine 2023; 18:1245-1257. [PMID: 36937549 PMCID: PMC10019345 DOI: 10.2147/ijn.s399026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 02/14/2023] [Indexed: 03/13/2023] Open
Abstract
Introduction The high concentration of glutathione (GSH) and hydrogen peroxide (H2O2) levels within the tumor microenvironment (TME) are the major obstacle to induce the unsatisfactory anticancer treatment efficiency. The synergistic cancer therapy strategies of the combination the GSH depletion enhanced chemodynamic therapy (CDT) with photothermal therapy (PTT) have been proved to be the promising method to significantly improve the therapeutic efficacy. Methods The copperphosphotungstate was incorporated into polyanilines to design copperphosphotungstate doped polyaniline nanorods (CuPW@PANI Nanorods) via chemical oxidant polymerization of aniline. The low long-term toxicity and biocompatibility were evaluated. Both in vitro and in vivo experiments were carried out to confirm the GSH depletion enhanced CDT/NIR-II PTT synergistic therapy. Results CuPW@PANI Nanorods feature biosafety and biocompatibility, strong NIR-II absorbance, and high photothermal-conversion efficiency (45.14%) in NIR-II bio-window, making them highly applicable for photoacoustic imaging and NIR-II PTT. Moreover, CuPW@PANI Nanorods could consume endogenous GSH to disrupt redox homeostasis and perform a Fenton-like reaction with H2O2 to produce cytotoxic •OH for the enhanced CDT. Furthermore, NIR-II photothermal-induced local hyperthermia accelerates •OH generation to enhance CDT, which realizes high therapeutic efficacy in vivo. Conclusion This study provides a proof of concept of GSH-depletion augmented chemodynamic/NIR-II photothermal therapy.
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Affiliation(s)
- Sheng Ye
- Guangdong Provincial Key Laboratory of Medical Image Processing, School of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong, People’s Republic of China
| | - Huichun Xiao
- Guangdong Provincial Key Laboratory of Medical Image Processing, School of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong, People’s Republic of China
| | - Jian Chen
- Guangdong Provincial Key Laboratory of Medical Image Processing, School of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong, People’s Republic of China
| | - Di Zhang
- Guangdong Provincial Key Laboratory of Medical Image Processing, School of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong, People’s Republic of China
| | - Li Qi
- Guangdong Provincial Key Laboratory of Medical Image Processing, School of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong, People’s Republic of China
| | - Ting Peng
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, People’s Republic of China
| | - Yanyang Gao
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, People’s Republic of China
| | - Qianbing Zhang
- Cancer Research Institute, School of Basic Medical Sciences, Southern Medical University, Guangzhou, Guangdong, People’s Republic of China
| | - Jinqing Qu
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong, People’s Republic of China
- Correspondence: Jinqing Qu; Ruiyuan Liu, Email ;
| | - Lei Wang
- College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, People’s Republic of China
| | - Ruiyuan Liu
- Guangdong Provincial Key Laboratory of Medical Image Processing, School of Biomedical Engineering, Southern Medical University, Guangzhou, Guangdong, People’s Republic of China
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Lu S, Li X, Liao Y, Zhang G. Optimized titania nanotubes photoanode mediated photoelectrochemical oxidation of ammonia in highly chlorinated wastewater via Cl-based radicals. ENVIRONMENTAL RESEARCH 2022; 214:113972. [PMID: 35952744 DOI: 10.1016/j.envres.2022.113972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/28/2022] [Accepted: 07/20/2022] [Indexed: 06/15/2023]
Abstract
Efficient removal of low-concentration ammonia from chlorinated wastewater is a challenge for decentralized wastewater treatment due to its notorious environmental effect and lethal influence on aquaculture. Photoelectrocatalytic (PEC) oxidation process is considered as an efficient and environment-friendly approach, whereas a low-cost and stable photoanode is crucial. In this study, TiO2 nanotubes (TNTs) photoanode (Ar-TNT-500 °C) with excellent physicochemical and photoelectrochemical properties was prepared by optimizing the parameters of anodization, including the voltage/times of anodization and the atmosphere/temperature of heat treatment. During the synthesis, the electrochemical and heat treatment processes promoted the formation of oxygen vacancies (OV) on the TNTs surface and enhanced its electrocatalytic activity. The optimized Ar-TNT-500 °C photoanode could selectively convert ammonia to N2 (86%) and a small amount of nitrate (14%). Radical quenching and probe experiments confirmed that the ClO produced by rapid quenching of OH and Cl by free chlorine dominated the selective degradation of ammonia in the synergistic process of photocatalysis and electrocatalysis. The cycle of chlorine-based radicals (ClO and Cl) and Cl- provided a continuous and efficient ammonia oxidation system, because chlorine-based radicals could efficiently and selectively oxidize ammonia and reduce the production of toxic (per) chlorate.
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Affiliation(s)
- Sen Lu
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, Shenzhen, 518055, PR China
| | - Xuechuan Li
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, Shenzhen, 518055, PR China
| | - Yunkai Liao
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, Shenzhen, 518055, PR China
| | - Guan Zhang
- State Key Laboratory of Urban Water Resource and Environment, Shenzhen Key Laboratory of Organic Pollution Prevention and Control, School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, Shenzhen, 518055, PR China.
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Almaie S, Vatanpour V, Rasoulifard MH, Koyuncu I. Volatile organic compounds (VOCs) removal by photocatalysts: A review. CHEMOSPHERE 2022; 306:135655. [PMID: 35817187 DOI: 10.1016/j.chemosphere.2022.135655] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 07/03/2022] [Accepted: 07/05/2022] [Indexed: 06/15/2023]
Abstract
Amplified anthropogenic release of volatile organic compounds (VOCs) gets worse air quality and human health. Photocatalytic degradation of VOCs is the practical strategy due to its low cost, simplicity, high efficiency, and environmental sustainability. Different types of photocatalyst activated by UV and visible lights are applied for VOC degradation. This review tries to investigate the state-of-art of recently published papers on this subject with a focus on the high-efficiency photocatalyst. The novel photocatalysts are introduced and enhancing photocatalytic activity strategies such as the hybrid of two/three photocatalyst, impurity doping, and heterojunctions with narrow bandgap semiconductors have been explained. The procedures of visible light activation of the photocatalysts are discussed with attention to current problems and future challenges. In addition, effective operational parameters in the photocatalytic degradation of VOCs have been reviewed with their advantages and drawbacks. A series of strategies are developed for the efficient utilization of visible light photocatalysts and improving new materials or design structures to degrade produced toxic intermediates/by-products during photocatalytic degradation of VOCs. This review shows that there are significant challenges in the applications of photocatalysts in the selective removal of VOCs. Several approaches should be combined to produce synergistic effects, which may lead to much higher photocatalytic performance than individual strategies. Another challenge is to develop efficient photocatalysts to meet real problems on an industrial scale.
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Affiliation(s)
- Soudeh Almaie
- Applied Chemistry Research Laboratory, Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, Iran
| | - Vahid Vatanpour
- Department of Applied Chemistry, Faculty of Chemistry, Kharazmi University, Tehran, 15719-14911, Iran; National Research Center on Membrane Technologies, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey; Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey.
| | - Mohammad Hossein Rasoulifard
- Applied Chemistry Research Laboratory, Department of Chemistry, Faculty of Science, University of Zanjan, Zanjan, Iran.
| | - Ismail Koyuncu
- National Research Center on Membrane Technologies, Istanbul Technical University, Maslak, 34469, Istanbul, Turkey; Environmental Engineering Department, Istanbul Technical University, Maslak, Istanbul, 34469, Turkey
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Zhu J, Liu Z, Yang F, Long D, Jian Y, Pu S. The Preparation of {001}TiO 2/TiOF 2 via a One-Step Hydrothermal Method and Its Degradation Mechanism of Ammonia Nitrogen. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15186465. [PMID: 36143777 PMCID: PMC9505796 DOI: 10.3390/ma15186465] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 09/13/2022] [Accepted: 09/14/2022] [Indexed: 05/06/2023]
Abstract
{001}TiO2/TiOF2 photocatalytic composites with a high activity {001} crystal plane were prepared by one-step hydrothermal methods using butyl titanate as a titanium source and hydrofluoric acid as a fluorine source. X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), raman spectroscopy, N2 adsorption-desorption curve (BET), UV-Vis diffuse absorption spectroscopy (UV-Vis DRS), X-ray photoelectron spectroscopy (XPS), and fluorescence spectroscopy (PL) were used to evaluate the structure, morphology, specific surface area, optical properties, and photocarrier separation ability of {001}TiO2/TiOF2. Ammonia nitrogen was taken as the target pollutant, and the degradation performance of the catalyst was investigated. The results show that hydrofluoric acid improves the content of {001} crystal plane of TiO2 with high activity; it also improves the specific surface area and dispersion of the composite material and adjusts the ratio of {001}TiO2 to TiOF2 in the composite material to enhance the absorption capacity of the composite material and reduce the band gap width of the composite material. The degradation rate of ammonia nitrogen by 100 mg F15 is 93.19% when the initial concentration of ammonia nitrogen is 100 mg/L and pH is 10. Throughout the reaction process, the {001}TiO2/TiOF2 composite produces superoxide anion radical (·O2-) and hydroxyl radical (·OH) to oxidize NH3·H2O and generate N2 accompanied by a small amount of NO3- and NO2-.
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Affiliation(s)
- Jiaming Zhu
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
| | - Zuohua Liu
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
| | - Feiyun Yang
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
| | - Dingbiao Long
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
- Correspondence: (D.L.); (S.P.)
| | - Yue Jian
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
| | - Shihua Pu
- Chongqing Academy of Animal Sciences, Chongqing 402460, China
- National Center of Technology Innovation for Pigs, Chongqing 402460, China
- Scientific Observation and Experiment Station of Livestock Equipment Engineering in Southwest, Ministry of Agriculture, Chongqing 402460, China
- Correspondence: (D.L.); (S.P.)
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Hu X, Zhao M, Zheng W, Zhu J. Preparation, Characterization, and Photocatalytic Performance of Ag/BiOBr 0.85I 0.15 Nanocomposites. MATERIALS (BASEL, SWITZERLAND) 2022; 15:6022. [PMID: 36079402 PMCID: PMC9456716 DOI: 10.3390/ma15176022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 08/26/2022] [Accepted: 08/28/2022] [Indexed: 06/15/2023]
Abstract
In the present paper, a series of Ag/BiOBr0.85I0.15 composite nanoparticles with different silver loading were prepared by a combined solvothermal and photocatalytic reduction method. The composite samples have been characterized by XRD, XPS, SEM, EDX, TEM, UV-Vis, and N2 adsorption/desorption techniques. The characterization results showed that BiOBr0.85I0.15 composite nanoparticles have a tetragonal phase structure. Silver nanoparticles are uniformly distributed on the BiOBr0.85I0.15, which results in surface plasmon resonance absorption, effectively increasing the visible light absorption ability of BiOBr0.85I0.15. The photocatalytic activity of the samples was evaluated by photocatalytic degradation of ammonia nitrogen in circulating aquaculture water under simulated sunlight irradiation. The effect of the Ag loading amount on the photocatalytic degradation of ammonia nitrogen was investigated. Silver loading of 1% (molar ratio) can effectively improve the degradation capacity of the catalyst for ammonia nitrogen in water. The recycling experiments show that 1%Ag/BiOBr0.85I0.15 has good photocatalytic stability. ESR characterization and oxidation species scavenging experimental results suggest that h+, 1O2, and ·O2- are the main oxidizing species in the photocatalytic system.
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Affiliation(s)
| | | | | | - Junjie Zhu
- School of Life Science, Huzhou University, No. 759, East 2nd Ring Road, Huzhou 313000, China
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Zhong W, Fu W, Sun S, Wang L, Liu H, Wang J. Characterization of TiO 2 and an as-prepared TiO 2/SiO 2 composite and their photocatalytic performance for the reduction of low-concentration N-NO 3- in water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:40585-40598. [PMID: 35084675 DOI: 10.1007/s11356-022-18793-z] [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: 11/01/2021] [Accepted: 01/14/2022] [Indexed: 06/14/2023]
Abstract
Excessive N-NO3- water pollution has become a widespread and serious problem that threatens human and ecosystem health. Here, a TiO2/SiO2 composite photocatalyst was prepared via the sol-gel/hydrothermal method. TiO2 and TiO2/SiO2 were characterized by X-ray diffraction (XRD), UV-Vis differential reflectance spectroscopy (DRS), Fourier infrared (FT-IR) spectroscopy, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDS). Afterward, the photocatalytic performance of TiO2 and TiO2/SiO2 to reduce low nitrate concentrations (30 mgN L-1) under UV light was evaluated and the effects of different factors on this process were investigated, after which the reaction conditions were optimized. Removal rates of up to 99.93% were achieved at a hole scavenger (formic acid) concentration of 0.6 mL L-1, a CO2 flow rate of 0.1 m3 h-1, and a TiO2 concentration of 0.9 g L-1. In contrast, TiO2/SiO2 at a 1.4 g L-1 concentration and a TiO2 load rate of 40% achieved a removal rate of 83.48%, but with more than 98% of nitrogen generation rate. NO2- and NH4+ were the minor products, whereas N2 was the main product.
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Affiliation(s)
- Wanzhen Zhong
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266000, China
| | - Weizhang Fu
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China.
| | - Shujuan Sun
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China.
| | - Lingsheng Wang
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China
| | - Huaihao Liu
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China
| | - Junzhi Wang
- School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao, 266000, China
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Xu H, Wang B, Zhao R, Wang X, Pan C, Jiang Y, Zhang X, Ge B. Adsorption behavior and performance of ammonium onto sorghum straw biochar from water. Sci Rep 2022; 12:5358. [PMID: 35354834 PMCID: PMC8967861 DOI: 10.1038/s41598-022-08591-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 03/09/2022] [Indexed: 11/14/2022] Open
Abstract
Sorghum has been widely used for liquor production and brewing, but how to make efficiently utilize sorghum straw (SS) has become an urgent problem. Meanwhile, the wastewater produced by winemaking is typical organic wastewater with a high ammonium concentration. To solve the problem of resource utilization of SS and remove ammonium from water, SS was used to prepare biochar as an adsorbent for ammonium adsorption. Batch adsorption experiments were carried out to study the influencing factors and adsorption mechanisms of ammonium onto sorghum straw biochar (SSB). The results showed that the adsorption capacity of SSB was much higher than that of SS. The SSB pyrolyzed at 300 °C had the highest adsorption capacity. The favorable pH was 6–10, and the optimal dosage was 2.5 g/L. The adsorption process and behavior conformed to the pseudo-second-order kinetic and Langmuir isotherm adsorption models. The maximum ammonium adsorption capacity of SSB at 45 °C was 7.09 mg/g, which was equivalent to 7.60 times of SS. The ammonium adsorption of SS and SSB was mainly chemical adsorption. The regeneration test indicated that SSB had good regeneration performance after three adsorption-regeneration cycles. This work suggests that SSB could be potentially applied to sewage treatment containing ammonium to achieve the purpose of resource recycling.
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Guo R, Bai L, Dong G, Chai D, Lang K, Mou Z, Zhao M. Construction of ZnO/Keggin Polyoxometalate Nano-heterojunction Catalyst for Efficient Removal of Rhodamine B in Aqueous Solution. J Inorg Organomet Polym Mater 2022. [DOI: 10.1007/s10904-022-02251-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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14
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Improved NH3-N conversion efficiency to N2 activated by BDD substrate on NiCu electrocatalysis process. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119350] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Feng J, Zhang X, Zhang G, Li J, Song W, Xu Z. Improved photocatalytic conversion of high-concentration ammonia in water by low-cost Cu/TiO 2 and its mechanism study. CHEMOSPHERE 2021; 274:129689. [PMID: 33529954 DOI: 10.1016/j.chemosphere.2021.129689] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Revised: 01/16/2021] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
Platinized TiO2 (Pt/TiO2) as a benchmark photocatalyst shows superior photocatalytic performance in environmental remediation. In order to reduce the cost of photocatalyst for practical use, a series of cooper loaded TiO2 (Cu/TiO2) photocatalysts were prepared by photoreduction method and compared with pure TiO2 and Pt/TiO2 in terms of overall ammonia conversion efficiency and selective oxidation. The as-prepared Cu/TiO2 samples were characterized and analyzed by physicochemical instrumental measurements. The results show that about 60% Cu2+ ions in suspension can be photodeposited onto the surface of TiO2 under UV light irradiation, and is mainly composed by a mixture of Cu/Cu+. The Cu/P25 (0.3 wt% Cu) sample was screened out as the optimal photocatalyst, via photoilluminance spectra analysis and photocatalytic oxidation of ammonia. It shows even better performance compared to Pt/TiO2 in the oxidation of high concentration of ammonia, due to the strong coordination effect by Cu(NH3)n complex formation. Through Electron Spin Resonance (EPR) analysis, and free radical suppression experiments, the active oxidative species account for ammonia oxidation and selective product generation were analyzed, and the possible reaction mechanisms involving photocatalytic ammonia conversion were proposed. ●OH has been identified as the main oxidant that affects the removal efficiency of ammonia nitrogen, whereas O2●- mainly affects the production of N2 and h+ is mainly responsible for the production of NO3-. These results indicate that Cu/TiO2 could be used as a low-cost and efficient photocatalyst in pretreatment process for conversion of high concentration of ammonia in wastewater.
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Affiliation(s)
- Jianpei Feng
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Shenzhen, Shenzhen, 518055, China
| | - Xiaolei Zhang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Shenzhen, Shenzhen, 518055, China
| | - Guan Zhang
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Shenzhen, Shenzhen, 518055, China.
| | - Ji Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Shenzhen, Shenzhen, 518055, China
| | - Wei Song
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Shenzhen, Shenzhen, 518055, China
| | - Zhiliang Xu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Shenzhen, Shenzhen, 518055, China
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Lin Z, Huang J. A hierarchical H3PW12O40/TiO2 nanocomposite with cellulose as scaffold for photocatalytic degradation of organic pollutants. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118427] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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17
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Wang W, Wang K, Xu L, Li Y, Niu J. Raney nickel coupled nascent hydrogen as a novel strategy for enhanced reduction of nitrate and nitrite. CHEMOSPHERE 2021; 263:128187. [PMID: 33297153 DOI: 10.1016/j.chemosphere.2020.128187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 08/24/2020] [Accepted: 08/26/2020] [Indexed: 06/12/2023]
Abstract
Raney nickel (R-Ni) is a cost-effective hydrogenation catalyst, and nascent hydrogen (Nas-H2) generated in situ on the cathode trends to more reactive than commercial hydrogen (Com-H2). In the present work, nitrate and nitrite (NOX-) reduction via R-Ni/Nas-H2 catalytic system was investigated. The results show that hydrogenation of NOX- (C0 = 3.0 mM) follows pseudo-first-order reaction kinetics with kinetic constants of 5.18 × 10-2 min-1 (NO3-) and 6.46 × 10-2 min-1 (NO2-). The saturation demand for Nas-H2 is only 0.8 mL min-1 at a fixed R-Ni dosage of 1.0 g L-1. The experiments reveal that both Nas-H2 and hydrogen adatoms (Hads∗) can drive the reduction of NOX-. The improved reduction ratios of NOX- are attributed to two aspects: (1) the micro/nano-sized Nas-H2 bubbles exhibits increased reactivity due to the fine dispersion of the hydrogen molecules; (2) the alkaline environment formed by the cathode positively maintain R-Ni activity, thus, Nas-H2 bubbles were more readily activated to generate powerful Hads∗. The results give insight into NOX- hydrogenation via introducing fine hydrogen resource, and can develop an efficient catalytic hydrogenation technique without noble metals.
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Affiliation(s)
- Weilai Wang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, People's Republic of China; Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, People's Republic of China
| | - Kaixuan Wang
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, People's Republic of China
| | - Lei Xu
- Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, People's Republic of China
| | - Yang Li
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, People's Republic of China
| | - Junfeng Niu
- State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing, 100875, People's Republic of China; Research Center for Eco-Environmental Engineering, Dongguan University of Technology, Dongguan, 523808, People's Republic of China.
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Ge X, Fu W, Wang Y, Wang L, Yao F. Removal of nitrate nitrogen from water by phosphotungstate-supported TiO 2 photocatalytic method. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:40475-40482. [PMID: 32666458 DOI: 10.1007/s11356-020-09947-y] [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: 03/31/2020] [Accepted: 06/29/2020] [Indexed: 06/11/2023]
Abstract
Nitrate nitrogen in water, especially in groundwater, is a major problem in the current drinking water environment. In this study, copper- and nickel-modified phosphotungstate catalysts supported on TiO2 were prepared by the sol-gel solvothermal method, and photocatalytic reduction by phosphotungstate was used to remove nitrate nitrogen in water under ultraviolet irradiation. The maximum removal rate was 59.60% with 0.8 g/L Cu-H3PW12O40/TiO2, 90 mg/L nitrate nitrogen, and 60 min reaction time. For Ni-H3PW12O40/TiO2, the maximum removal rate of nitrate nitrogen was 54.58%, achieved with a catalyst concentration of 0.8 g/L, nitrate nitrogen concentration of 120 mg/L, and reaction time of 30 min. Both catalysts could remove nitrate nitrogen from water under the condition of photocatalysis.
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Affiliation(s)
- Xiaohong Ge
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China
- College of Ecology and Environmental Protection, Linyi Vocational University of Science and Technology, Linyi, 276000, People's Republic of China
| | - Weizhang Fu
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China.
| | - Yujun Wang
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China.
| | - Lingsheng Wang
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China
| | - Fanfeng Yao
- College of Resources and Environment, Shandong Agricultural University, Tai'an, 271018, People's Republic of China
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A Polyoxometalate Composite Based on Hierarchical MIL-101 with Enhanced Catalytic Activity in Methanolysis of Styrene Oxide. Catalysts 2020. [DOI: 10.3390/catal10070772] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A new efficient polyoxometalate composite catalyst of hierarchical MIL-101 and phosphotungstic acid (PTA) was facilely prepared by the immersion method. The material was thoroughly characterized by powder x-ray diffraction (PXRD), scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDX) and inductively coupled plasma‒optical emission spectrometry (ICP-OES). Compared to the pristine nonhierarchical MIL-101 composite, the hierarchical composite demonstrated much higher catalytic performance in methanolysis of styrene oxide, such as catalytic activity and reusability.
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