科技部新聞稿

水科技再升級 臺灣奈米技術領先國際

全球首創奈米孔洞碳材於高效電容去離子系統

日期：108年12月25日

發稿單位：科技部工程司

聯絡人：程弘副研究員

電話：2737-7776

E-mail：hcheng@nstc.gov.tw

為解決臺灣的水資源問題，科技部長期推動與支持多項專題研究計畫，鼓勵關鍵材料的發展，本次記者會介紹2位科技部優秀年輕學者計畫所支持之臺大學者所共同合作之成果, 由化學工程學系吳嘉文教授負責新穎材料之開發, 再由環境工程學研究所侯嘉洪教授負責實際應用於電容去離子系統之設立，他們整合了科技部兩項計畫，成功開發了領先全球的創新技術：『領先國際之奈米孔洞碳材於高效能電容去離子系統』。此兩位優秀年輕學者計畫成果，不僅發表於一流國際期刊Nanoscale，同時獲選為期刊封面 (front cover)，2位教授特別將象徵台灣之台北101放到封面之中, 藉此宣傳這些工作是Made in Taiwan。

高導電, 高電吸附的創新奈米孔洞碳材

在關鍵材料的發展方面，吳嘉文教授團隊開發之新穎奈米孔洞金屬有機骨架材料：沸石咪唑酯骨架-8衍生氮摻雜孔洞碳，具有高的比表面積，可增加電吸附容量。為了進一步提升效能，臺大團隊將金奈米顆粒嵌入到沸石咪唑酯骨架-8，隨後再將此物質碳化，或是以PEDOT導電高分子，與沸石咪唑酯骨架-8共同碳化製備。研究結果顯示，以金奈米顆粒嵌入，與以PEDOT導電高分子改質，產生的電極材料，可具有高的比表面積、階層性的孔洞結構、優異的導電性，此衍生氮摻雜孔洞碳材可作為高效能的電極材料, 電吸附容量約為16.2 mg/g, 遠優於現有商業活性碳的三倍,可大幅提升其電化學脫鹽的應用優勢。

電吸附能力與技術成熟度領先國際之奈米孔洞碳材於高效能電容去離子系統

在創新水科技的發展方面，侯嘉洪副教授長期致力於發展創新的電容去離子技術(Capacitive deionization, CDI)，同時為國際CDI研究組織的工作小組委員。CDI技術為一項新穎、低用電的奈米水處理程序，以奈米孔洞碳材為電極，以電荷貯存的原理，移除水體中的鹽類或是帶電的污染物質。此技術可應用在水淡化、硬水的軟化、重金屬的移除、地下水砷的去除、再生水、以及廢水採礦等，在國際間被認為最具有前瞻性之潛力技術。吳嘉文教授與侯嘉洪副教授的創新性的研究成果達到在低電壓1.2V操作下, 目前國際最高的電容去離子量 (16.2 mg/g) 的優異效果。此外, 不同於國際的學術研究團隊， 此領先研究已將CDI技術進行模型廠實驗，成功在真實環境驗證測試，完成CDI的技術示範，研究能量已成功擴散到產業界，往商業化邁進，協助台灣水科技產業的技術升級，從而解決台灣面臨的水資源和物質流失衡等永續性問題。

       在科技部的長期支持下，臺大的科研團隊共同開發的奈米洞碳材與電容去離子技術，已累積豐碩的科研能量，在國際上的領域中，有相當的國際聲望與影響力。吳嘉文教授獲得德國洪堡學者, 美國化學學會頒發的講師獎 (Lectureship Award)，亞太催化優秀年輕學者獎等. 侯嘉洪教授則分別與美國柏克萊勞倫斯伯克利國家實驗室(Lawrence Berkeley National Laboratory)、伊利諾伊大學厄巴納－香檳分校(University of Illinois at Urbana-Champaign)、奈米技術水處理工程研究科技(Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment)等著名研究單位，組成國際的研究團隊，發展具有前瞻性之潛力電化學，未來可持續獲得突破性的研究成果，此外, 此技術已成立新創公司, 驗證其產業價值, 未來非常有望為國內外半導體工廠、化工廠排放廢水所使用，幫助降低環境水污染，與強化水資源再利用之技術，進而滿足綠色清淨永續水資源之目標。

〈參考資料〉國際期刊發表資料：

1. High Performance Capacitive Deionization Using Modified ZIF-8 Derived N-doped Porous Carbon Electrodes with Improved Electrical Conductivity, Nanoscale, 10, 14852–14859, 2018.

研究成果聯絡人

吳嘉文教授  臺灣大學化學工程學系

電話：0988-707-847    E-mail：kevinwu@ntu.edu.tw

Press Release

December 25th, 2019

First-time Reported Nanoporous Carbon Material for High-efficient Capacitive Deionization Innovation Research Made in Taiwan

The Taiwan Ministry of Science and Technology (MoST) has been long-term promoting and supporting a number of Research Project Grants to encourage critical material development, in order to tackle water resource problems in Taiwan. The press conference today will introduce the collaborative research achievements of two National Taiwan University (NTU) scholars supported by the MoST. Prof. Wu from Chemical Engineering Department first developed the innovative material, then Prof. Hou from Graduate Institute of Environmental Engineering successfully established the high-efficient capacitive deionization system with the innovative material. The two scholars synergized two projects from MoST, and successfully developed world-leading innovative technology - Nanoporous Carbon Material for High-efficient Capacitive Deionization. The research achievements have been published in Nanoscale and featured as a journal cover. To promote this work as a milestone of Made in Taiwan, the two scholars put Taipei 101, which is the symbol of Taiwan, on the journal cover.

Innovative nanoporous carbon material with high conductivity and high electrosorption

In terms of the development of key materials, Prof. Wu’s team has developed novel nitrogen-doped nanoporous carbon derived from zeolitic imidazolate metal organic framework (ZIF-8), which exhibits large surface area to enhance electrosorption capacities. To further improve the performance, the NTU research team prepared the materials with gold-nanoparticle-embedded ZIF-8 framework, followed by carbonization, or introducing poly(3,4-ethylenedioxythiophene) (PEDTO), a highly conductive polymer, to co-carbonize with ZIF-8 framework. The research results showed that the modified nitrogen-doped porous carbon materials by either gold-nanoparticle-embedded or PEDTO introduction can be applied as promising electrode materials with large surface area, hierarchical porous structure, and excellent electrical conductivity. The developed novel material exhibits a high electrosorption capacity of 16.2 mg/g, which is over three-time higher than the commercially available activated carbon, and greatly enhance the application advantages in electrochemical desalination.

Electrosorption capacity and technology maturity: World-leading nanoporous carbon materials applied in high-efficient capacitive deionization

In the field of innovative water technology, Prof. Hou has been committed to the development of innovative capacitive deionization (CDI) for a long time, and he is also a committee member of the International CDI research organization. The CDI technology is an innovative, low energy-consumption water treatment process, which employs nanoporous carbon materials as electrodes, and removes salts and charged pollutants by ion storage. This technology can be applied in desalination, hard water softening, heavy metal removal, arsenic removal from groundwater, reclaimed water and wastewater mining etc., which is therefore regarded as one of the most promising technologies in the world. Prof. Wu and Prof. Hou reported the highest electrosorption capacity of 16.2 mg/g achieved at a low electrical voltage of 1.2 V for the first time in the world. In addition, this world-leading CDI technology has been verified in the actual environment in pilot scale for technology demonstration. The research achievements of this project have already attracted the industrial attention and been moving towards commercialization to assist technology upgrade of the water technology industry in Taiwan, which will ultimately solve the sustainability issues such as the imbalance of water resource and material flows in Taiwan.

Under the long-term support of the MOST, the collaboration of NTU research teams on the join-development of nanoporous carbon materials for capacitive deionization has attracted considerable attention with international reputation and recognition. Prof. Wu received the Humboldt Scholar from Germany, the Lectureship Award from the American Chemical Society, the Asia-Pacific Catalysis Outstanding Young Scholar Award, etc. Meanwhile, Prof. Hou has formed an international research team including Lawrence Berkeley National Laboratory, University of Illinois at Urbana-Champaign, Nanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment and other well-known research institutes to develop promising electrochemical technologies and to continue striving for groundbreaking research. In addition, the industrial value of the CDI technology is validated in the startup company. The technology is very promising to be used in wastewater treatment for both domestic and oversea semiconductor factories and chemical industries to mitigate water pollution, enhance water recyclability, and to meet the ultimate goal of green, clean and sustainable water resources.

Reference on International Publication:

1. High Performance Capacitive Deionization Using Modified ZIF-8 Derived N-doped Porous Carbon Electrodes with Improved Electrical Conductivity, Nanoscale, 10, 14852–14859, 2018.

Media Contact

Prof. Kevin Chia-Wen Wu

Chemical Engineering Department, National Taiwan University, Taiwan

kevinwu@ntu.edu.tw

+886-988-707-847   

Hong Chen

Dept. of Engineering and Technologies, MOST

hcheng@nstc.gov.tw

+886-2-2737-7776