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energy production from water bodies within 20 minutes, greatly shortening the reaction time, saving energy, and enhancing the overall efficiency on water quality and sustainablility. The specific contributions of current research mainly include (1) waterenergy nexus, (2) net-zero emissions technology, and (3) green technology. (1) Water-energy nexusTrace and emerging pollutants contamination, green energy crisis, and impact of climate change are prominent environmental and sustainability issues worldwide. The progress in environmental green technology and energy materials has triggered the integration of environmental and energy issues. Currently, the conventional treatment technologies cannot show the integrated treatment efficiency of water and energy. Professor Doong combines (photo)electrochemical principles and catalytic technology to simultaneously carry out water purification and recovery and clean energy applications through the capacitive desalination and photoelectrocatalysis technology. These new findings can inject new elements into the currently developed environmental green technology to improve water circulation and water quality safety.(2) Application of net-zero emissions technologyDriven by global environmental change, many net-zero emission technologies, including green hydrogen production, CO2 reduction and reuse, and energy storage applications are currently attractive technologies. In addition to the hydrogen evolution from water splitting with photocatalytic technology, Professor Doong has also developed supercapacitors and lithium-ion batteries using agriculture-derived carbonaceous materials. Moreover, Professor Doong closely collaborates with Professor Paul Westerhoff, an Academician of National Academy of Engineering, to develop the catalytic thin filmbased optical fiber technology for H2O2 production and CO2reduction to apply net-zero technology. These novel results have attracted the attention and interest of the United States National Aeronautics and Space Administration (NASA).(3) Green technology for refractory organic removalTraditional environmental technology is usually based on the removal of the same type of pollutants, and only a few research works focus on the technology which can treat different types of pollutants. Professor Doong merges the redox principle in environmental chemistry with the spirit of surface analysis and nanotechnology technology to develop a multi-functional platform for net zero emissions. The highlight technology is the development of multiple reaction capabilities on the same material, such as reduction + adsorption + capacitance desalination; photocatalysis + water splitting hydrogen production. One example is the combination of a photocatalyst with carbon dots, which can convert adsorbed heavy metals into catalytic metal ions to serve as the redox center for enhanced photodegradation of organic contaminants. These nanomaterials can be customized to fulfill the need for environmental friendliness to meet the purpose of rapid and effective photodegradation of emerging pollutants within 20 minutes, which can reach the remarkable achievement of AOPs.%u7b2c%u4e09%u5341%u4e00%u5c46%u6771%u5143%u734e%uff0e%u79d1%u6280%u985e%u734e%u6a5f%u68b0 / %u6de8%u96f6%u6392%u653e / %u74b0%u5883%u79d1%u6280