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Materials Design and Electrochemical Engineering for Pollution Control.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Materials Design and Electrochemical Engineering for Pollution Control./
作者:	Xu, Jinwei.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	130 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-05, Section: B.
Contained By:	Dissertations Abstracts International83-05B.
標題:	Volatile organic compounds--VOCs. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28812875
ISBN:	9798494447470

Materials Design and Electrochemical Engineering for Pollution Control.
Xu, Jinwei.

Materials Design and Electrochemical Engineering for Pollution Control. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 130 p.

Source: Dissertations Abstracts International, Volume: 83-05, Section: B.

Thesis (Ph.D.)--Stanford University, 2021.

This item must not be sold to any third party vendors.

The ultimate goal of sustainable development is to preserve the Earth for our future generations. Clean water, fertile soil and fresh air are basic necessities for human wellbeing; however, they are among the natural resources most vulnerable to pollution. Using my expertise in materials science, catalysis, and electrochemistry I developed during my doctoral studies, I synthesized unique materials and designed novel reactors to find solutions for various environmental problems.In Chapter 1, I will motivate the need for developing electrochemical technologies for solving environmental problems and give a brief introduction to the thermodynamics and kinetics in electrochemical systems.Chapter 2 will describe my efforts in reducing the energy and chemical demands for organic wastewater treatment. Specifically, I discovered that copper single atoms incorporated in graphitic carbon nitride can catalytically activate hydrogen peroxide to generate hydroxyl radicals, which then non-selectively oxidizes organic pollutants into harmless small molecules. To further eliminate the dependence of the treatment system on H2O2, I developed a H2O2 electrolyser for on-site generation of H2O2 from air, water and renewable energy. These two innovations work in tandem to deliver a wastewater treatment system with substantially reduced energy and chemical inputs compared with conventional advanced oxidation processes.Chapter 3 will demonstrate a method for removal of heavy metals from contaminated soil. This method is composed of a recirculating soil washing system using EDTA solution and an electrochemical filter that removes heavy metals from the EDTA solution by electrodeposition. I discovered that applying an alternating-current bias with an optimal waveform mitigates side reactions and enhances the electrodeposition efficiency of the electrochemical filter compared with applying a direct-current bias. In addition, the regeneration ability of the electrochemical filter makes this platform suitable for recovery of heavy metals from a diverse range of waste streams.Chapter 4 will present a way to promote the catalytic activity of platinum for the degradation of formaldehyde in air, namely by covering the platinum surface with a nanoscale-thin layer of aqueous electrolyte. This discovery was made possible by a platinum-coated nanoporous polyethylene membrane, which is able to construct and retain an evaporation-stable aqueous electrolyte layer over platinum with an effective thickness of just a few tens of nanometers. In a broader context, my work demonstrates that the knowledge obtained through the development of gas diffusion electrodes in fuel cells can be applied to gas-phase heterogeneous catalysis beyond electrochemical systems.

ISBN: 9798494447470Subjects--Topical Terms:

3683745
Volatile organic compounds--VOCs.

Materials Design and Electrochemical Engineering for Pollution Control.
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500 $a Source: Dissertations Abstracts International, Volume: 83-05, Section: B.
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506 $a This item must not be sold to any third party vendors.
520 $a The ultimate goal of sustainable development is to preserve the Earth for our future generations. Clean water, fertile soil and fresh air are basic necessities for human wellbeing; however, they are among the natural resources most vulnerable to pollution. Using my expertise in materials science, catalysis, and electrochemistry I developed during my doctoral studies, I synthesized unique materials and designed novel reactors to find solutions for various environmental problems.In Chapter 1, I will motivate the need for developing electrochemical technologies for solving environmental problems and give a brief introduction to the thermodynamics and kinetics in electrochemical systems.Chapter 2 will describe my efforts in reducing the energy and chemical demands for organic wastewater treatment. Specifically, I discovered that copper single atoms incorporated in graphitic carbon nitride can catalytically activate hydrogen peroxide to generate hydroxyl radicals, which then non-selectively oxidizes organic pollutants into harmless small molecules. To further eliminate the dependence of the treatment system on H2O2, I developed a H2O2 electrolyser for on-site generation of H2O2 from air, water and renewable energy. These two innovations work in tandem to deliver a wastewater treatment system with substantially reduced energy and chemical inputs compared with conventional advanced oxidation processes.Chapter 3 will demonstrate a method for removal of heavy metals from contaminated soil. This method is composed of a recirculating soil washing system using EDTA solution and an electrochemical filter that removes heavy metals from the EDTA solution by electrodeposition. I discovered that applying an alternating-current bias with an optimal waveform mitigates side reactions and enhances the electrodeposition efficiency of the electrochemical filter compared with applying a direct-current bias. In addition, the regeneration ability of the electrochemical filter makes this platform suitable for recovery of heavy metals from a diverse range of waste streams.Chapter 4 will present a way to promote the catalytic activity of platinum for the degradation of formaldehyde in air, namely by covering the platinum surface with a nanoscale-thin layer of aqueous electrolyte. This discovery was made possible by a platinum-coated nanoporous polyethylene membrane, which is able to construct and retain an evaporation-stable aqueous electrolyte layer over platinum with an effective thickness of just a few tens of nanometers. In a broader context, my work demonstrates that the knowledge obtained through the development of gas diffusion electrodes in fuel cells can be applied to gas-phase heterogeneous catalysis beyond electrochemical systems.
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