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Li S, Lin Y, Liu G, Shi C. Research status of volatile organic compound (VOC) removal technology and prospect of new strategies: a review. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2023; 25:727-740. [PMID: 36897314 DOI: 10.1039/d2em00436d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
As an important component of air pollution, the efficient removal of volatile organic compounds (VOCs) is one of the most important challenges in the world. VOCs are harmful to the environment and human health. This review systematically introduced the main VOC control technologies and research hotspots in recent years, and expanded the description of electrocatalytic oxidation technology and bimetallic catalytic removal technology. Based on a three-dimensional electrode reactor, the theoretical design of a VOC removal control technology using bimetallic three-dimensional particle electrode electrocatalytic oxidation was proposed for the first time. The future research focus of this method was analyzed, and the importance of in-depth exploration of the catalytic performance of particle electrodes and the system reaction mechanism was emphasized. This review provides a new idea for using clean and efficient methods to remove VOCs.
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Affiliation(s)
- Siwen Li
- School of Environment, Northeast Normal University, No. 2555 Jingyue Street, Changchun, Jilin 130117, China.
| | - Yingzi Lin
- Key Laboratory of Songliao Aquatic Environment, Ministry of Education, Jilin Jianzhu University, Changchun 130118, China
- School of Municipal & Environmental Engineering, Jilin Jianzhu University, Changchun 130118, China
| | - Gen Liu
- School of Environment, Northeast Normal University, No. 2555 Jingyue Street, Changchun, Jilin 130117, China.
| | - Chunyan Shi
- The University of Kitakyushu, 1-1 Hibikino Wakamatsuku Kitakyushu, Fukuoka, Japan
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Kalair AR, Seyedmahmoudian M, Stojcevski A, Abas N, Khan N. Waste to energy conversion for a sustainable future. Heliyon 2021; 7:e08155. [PMID: 34729426 PMCID: PMC8545696 DOI: 10.1016/j.heliyon.2021.e08155] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/29/2021] [Accepted: 10/07/2021] [Indexed: 12/26/2022] Open
Abstract
Air pollution, climate change, and plastic waste are three contemporary global concerns. Air pollutants affect the lungs, green gases trap heat radiation, and plastic waste contaminates the marine food chain. Two-thirds of climate change and air pollution drivers are emitted in the process of burning fossil fuels. Pollutants settle in months, green gases take centuries, and plastics take thousands of years. The most polluted regions on the planet are also the ones that are greatly affected by climate change. Air pollutants grow in most climate-change affected areas, contributing to the greenhouse effect. Smog affects local and regional transboundary countries. The biggest greenhouse gas (GHG) emitters may not be the worst-hit victims because wind and water flow distribute green gases and plastic waste worldwide. The major polluters are often rich and developed countries, and the worst affected countries are the underdeveloped poor communities. Technologically advanced countries may help the developing countries in research into removing particulate matter, green gases, and plastic waste. Intergovernmental Panel on Climate Change (IPCC) and Paris Accord have emphasized on immeasurable efforts to encourage the conversion of pollution, green gases, and plastic waste into energy. Conversion of CO2 into petrol, GHG gases into chemicals, biowaste into biofuels, plastic waste into building bricks, and concrete waste into construction materials fosters a circular economy. This work reviews existing waste to power, energy, and value-added product conversion technologies.
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Affiliation(s)
- Ali Raza Kalair
- Department of Telecommunications, Electrical, Robotics and Biomedical Engineering, Swinburne University, Australia
| | - Mehdi Seyedmahmoudian
- Department of Telecommunications, Electrical, Robotics and Biomedical Engineering, Swinburne University, Australia
| | - Alex Stojcevski
- Department of Telecommunications, Electrical, Robotics and Biomedical Engineering, Swinburne University, Australia
| | - Naeem Abas
- Department of Electrical Engineering, University of Gujrat, Hafiz Hayat Campus, Pakistan
| | - Nasrullah Khan
- Department of Electrical and Computer Engineering, COMSATS University Islamabad, Pakistan
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Layer-by-Layer-Stabilized Plasmonic Gold-Silver Nanoparticles on TiO 2: Towards Stable Solar Active Photocatalysts. NANOMATERIALS 2021; 11:nano11102624. [PMID: 34685070 PMCID: PMC8540643 DOI: 10.3390/nano11102624] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/29/2021] [Accepted: 10/01/2021] [Indexed: 11/17/2022]
Abstract
To broaden the activity window of TiO2, a broadband plasmonic photocatalyst has been designed and optimized. This plasmonic ‘rainbow’ photocatalyst consists of TiO2 modified with gold–silver composite nanoparticles of various sizes and compositions, thus inducing a broadband interaction with polychromatic solar light. However, these nanoparticles are inherently unstable, especially due to the use of silver. Hence, in this study the application of the layer-by-layer technique is introduced to create a protective polymer shell around the metal cores with a very high degree of control. Various TiO2 species (pure anatase, PC500, and P25) were loaded with different plasmonic metal loadings (0–2 wt %) in order to identify the most solar active composite materials. The prepared plasmonic photocatalysts were tested towards stearic acid degradation under simulated sunlight. From all materials tested, P25 + 2 wt % of plasmonic ‘rainbow’ nanoparticles proved to be the most promising (56% more efficient compared to pristine P25) and was also identified as the most cost-effective. Further, 2 wt % of layer-by-layer-stabilized ‘rainbow’ nanoparticles were loaded on P25. These layer-by-layer-stabilized metals showed superior stability under a heated oxidative atmosphere, as well as in a salt solution. Finally, the activity of the composite was almost completely retained after 1 month of aging, while the nonstabilized equivalent lost 34% of its initial activity. This work shows for the first time the synergetic application of a plasmonic ‘rainbow’ concept and the layer-by-layer stabilization technique, resulting in a promising solar active, and long-term stable photocatalyst.
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Amano F, Mukohara H, Shintani A, Tsurui K. Solid Polymer Electrolyte-Coated Macroporous Titania Nanotube Photoelectrode for Gas-Phase Water Splitting. CHEMSUSCHEM 2019; 12:1925-1930. [PMID: 30338662 DOI: 10.1002/cssc.201802178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2018] [Revised: 10/17/2018] [Indexed: 06/08/2023]
Abstract
Photoelectrochemical (PEC) water vapor splitting by using n-type semiconductor electrodes with a proton exchange membrane (PEM) enabled pure hydrogen production from humidity in ambient air. We proved a design concept that the gas-electrolyte-semiconductor triple-phase boundary on a nanostructured photoanode is important for the photoinduced gas-phase reaction. A surface coating of solid-polymer electrolyte on a macroporous titania-nanotube array (TNTA) electrode markedly enhanced the incident photon-to-current conversion efficiency (IPCE) at the gas-solid interface. This indicates that proton-coupled electron transfer is the rate-determining step on the bare TNTA electrode for the gas-phase PEC reaction. The perfluorosulfonate ionomer-coated TNTA photoanode exhibited an IPCE of 26 % at an applied voltage of 1.2 V under 365 nm ultraviolet irradiation. The hydrogen production rate in a large PEM-PEC cell (16 cm2 ) was 10 μmol min-1 .
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Affiliation(s)
- Fumiaki Amano
- Department of Chemical and Environmental Engineering, The University of Kitakyushu, Kitakyushu, Fukuoka, 808-0135, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Kawaguchi, Saitama, 332-0012, Japan
| | - Hyosuke Mukohara
- Department of Chemical and Environmental Engineering, The University of Kitakyushu, Kitakyushu, Fukuoka, 808-0135, Japan
| | - Ayami Shintani
- Department of Chemical and Environmental Engineering, The University of Kitakyushu, Kitakyushu, Fukuoka, 808-0135, Japan
| | - Kenyou Tsurui
- Department of Chemical and Environmental Engineering, The University of Kitakyushu, Kitakyushu, Fukuoka, 808-0135, Japan
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Amano F, Shintani A, Mukohara H, Hwang YM, Tsurui K. Photoelectrochemical Gas-Electrolyte-Solid Phase Boundary for Hydrogen Production From Water Vapor. Front Chem 2018; 6:598. [PMID: 30560121 PMCID: PMC6287029 DOI: 10.3389/fchem.2018.00598] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Accepted: 11/19/2018] [Indexed: 11/13/2022] Open
Abstract
Hydrogen production from humidity in the ambient air reduces the maintenance costs for sustainable solar-driven water splitting. We report a gas-diffusion porous photoelectrode consisting of tungsten trioxide (WO3) nanoparticles coated with a proton-conducting polymer electrolyte thin film for visible-light-driven photoelectrochemical water vapor splitting. The gas-electrolyte-solid triple phase boundary enhanced not only the incident photon-to-current conversion efficiency (IPCE) of the WO3 photoanode but also the Faraday efficiency (FE) of oxygen evolution in the gas-phase water oxidation process. The IPCE was 7.5% at an applied voltage of 1.2 V under 453 nm blue light irradiation. The FE of hydrogen evolution in the proton exchange membrane photoelectrochemical cell was close to 100%, and the produced hydrogen was separated from the photoanode reaction by the membrane. A comparison of the gas-phase photoelectrochemical reaction with that in liquid-phase aqueous media confirmed the importance of the triple phase boundary for realizing water vapor splitting.
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Affiliation(s)
- Fumiaki Amano
- Department of Chemical and Environmental Engineering, The University of Kitakyushu, Kitakyushu, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Kawaguchi, Japan
| | - Ayami Shintani
- Department of Chemical and Environmental Engineering, The University of Kitakyushu, Kitakyushu, Japan
| | - Hyosuke Mukohara
- Department of Chemical and Environmental Engineering, The University of Kitakyushu, Kitakyushu, Japan
| | - Young-Min Hwang
- Department of Chemical and Environmental Engineering, The University of Kitakyushu, Kitakyushu, Japan
| | - Kenyou Tsurui
- Department of Chemical and Environmental Engineering, The University of Kitakyushu, Kitakyushu, Japan
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Wang L, Liu L, Yang F. Efficient gas phase VOC removal and electricity generation in an integrated bio-photo-electro-catalytic reactor with bio-anode and TiO 2 photo-electro-catalytic air cathode. BIORESOURCE TECHNOLOGY 2018; 270:554-561. [PMID: 30253348 DOI: 10.1016/j.biortech.2018.09.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 09/06/2018] [Accepted: 09/07/2018] [Indexed: 06/08/2023]
Abstract
An efficient and cost-effective bio-photo-electro-catalytic reactor (BPEC) was developed, it combined bio-anode with TiO2 photo-electro-catalytic air cathode and could remove rapidly model gas phase VOC ethyl acetate (EA) and generate electricity simultaneously. This BPEC system exhibited a synergistic effect between the photo-electro-catalysis and microbial fuel cell (MFC) bio-electrochemical process. Calculated kinetic constant of the BPEC system (0.085 min-1) was twice the sum of those of photocatalysis (only electrolyte in the anode, without microbes, 0.033 min-1) and MFC (no photocatalysis, 0.010 min-1) systems. Compared to BPEC with proton exchange membrane (PEM) separator (59.6 mW/cm2), the system with polyvinylidene fluoride (PVDF) membrane had a higher EA degradation rate and power generation (92.8 mW/cm2). A lower external resistance resulted in a faster EA degradation rate. This report provides a new platform for treating other kinds of gas pollutants via integrated bio-electrochemical and gas-solid photo-electro-catalytic reactions, with energy generation and conversions.
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Affiliation(s)
- Lihong Wang
- Key Laboratory of Industrial Ecology and Environmental Engineering(MOE), School of Environmental Science &Technology, Dalian University of Technology, Dalian 116024, China
| | - Lifen Liu
- Key Laboratory of Industrial Ecology and Environmental Engineering(MOE), School of Environmental Science &Technology, Dalian University of Technology, Dalian 116024, China; School of Food and Environment, Dalian University of Technology, Panjin 124221, China.
| | - Fenglin Yang
- Key Laboratory of Industrial Ecology and Environmental Engineering(MOE), School of Environmental Science &Technology, Dalian University of Technology, Dalian 116024, China
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