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演講快訊
Study on Tungsten-Oxide Based Materials for Solar-Driven Water Evaporation, Sewage Treatment, and Desalination
[2020/11/27]
教務
Study on Tungsten-Oxide Based Materials for Solar-Driven Water Evaporation, Sewage Treatment, and Desalination

時間

20201127 () 15:10 PM    主持人:柯碧蓮老師

                                                發佈人:謝馨瑩

講者

吳昌謀 教授

服務單位

臺灣科技大學材料科學與工程系

講題

Study on Tungsten-Oxide Based Materials for Solar-Driven Water Evaporation, Sewage Treatment, and Desalination

地點

93406

語言

中文

摘要

ABSTRACT

Solar energy is a kind of renewable energy source open to mankind because of its wide availability and inexhaustibility. The conversion and use of solar energy is one of the main solutions for addressing the global energy and environmental crisis expected. The use of photo-thermal materials has gained renewed scientific interest over the last decade and has resulted in some niche applications due to its simple operation and more importantly extremely high energy conversion efficiency. Among various photo-thermal materials, semiconductor type metal-oxides such as tungsten-oxides based materials are the most promising candidates for converting light to heat energy under optical illumination. Herein, the highlights of non-stoichiometric tungsten-oxide (WO3-x) and tungsten bronze (MxWO3) materials for their photothermal conversion properties, applications for light-driven interfacial water evaporation and full-spectrum solar to heat conversion for enhanced steam generation.

 

This lecture, melt electrospun reduced tungsten oxide/polylactic acid fiber membranes as photothermal material for light-driven interfacial water evaporation will be presented firstly. Accordingly, melt electrospun reduced tungsten oxide-Polylactic acid (WO2.72/PLA) fiber membranes were successfully prepared for the first time with improved near-infrared (NIR) photothermal conversion properties owing to strong NIR photoabsorption by the metal oxide. This melt electrospun WO2.72/PLA fiber membranes, floatable on water due to surface hydrophobicity, was systematically designed for, and applied to, vapor generation based on the interfacial concept of solar heating. With the photothermal WO2.72/PLA fiber membrane containing 7 wt% of WO2.72 nanoparticles, the water evaporation efficiency was reached 81.39 %, which is higher than that for the pure PLA fiber membrane and bulk water. Thus, this work contributes to the development of novel photothermal fiber membranes in order to enhance light-driven water evaporation performance for potential applications in the fields of water treatment and desalination.

 

Here, we fabricate combined rubidium tungsten bronze and recycled triacetate cellulose (RbxWO3/rTAC) porous fiber membranes without any supporting components, via solution electrospinning. The results showed that the evaporation efficiency of RbxWO3/rTAC fiber membranes with an optimized 15wt% of RbxWO3 nanorods reached 90.4±2.1%, which is considerably greater than that of pure rTAC fiber membranes and of pure water. A great potential has been proved by simulating solar exposure, with a water conversion efficiency of approximately 73.6%. Thus, RbxWO3/rTAC photothermal fiber membranes can find applications in water purification, desalination, and steam power generation.

 

Full-spectrum photothermally activated membranes with RbxWO3-Fe3O4 nanocomposites was designed for efficient solar driven water evaporation and water purification. The utilization of inexpensive Fe3O4 nanoparticles with tungsten bronze nanorods is a convenient approach for accelerating the full spectrum absorption while ensuring a high evaporation rate. The optical results proved that the RbxWO3-Fe3O4 nanocomposites exhibit a high absorbance in a wide spectrum, especially in the Visible and NIR region. Compared to our previously reported tungsten bronze/recycled cellulose triacetate porous membrane, RbxWO3-Fe3O4/rTAC photothermal membrane with hydrophilic supporting layer displayed significantly enhanced water evaporation efficiency of 89.3%. Our work highlights the great potentials for implementing solar energy driven photothermal water evaporation and water purification. Due to its strong photothermal effect, it directly condensed clean water from pollutant through evaporation-condensation process. This multifunctional treatment of contaminated water would offer a new and practical avenue to maximize the use of solar energy for clean water generation.

 

學經歷

學歷:

國立中山大學材料科學研究所博士

 

經歷:

國立台灣科技大學材料科學與工程系教授2018/02 – 迄今

中華逢甲大學纖維與複合材料協會副理事長,2019/11-迄今。

臺灣證券交易所上市審議案產業專家,2019-迄今。

台灣產業用紡織品協會監事,2016/09/12-迄今。

中華民國尖端材料科技協會(SAMPE)常務理事, 2015/10/23-迄今。

財團法人紡織產業綜合研究所「紡織業發展委員會」委員。106年度-迄今。

台灣區絲織工業同業公會「永續發展委員會」委員。106年度-迄今。

財團法人塑膠工業技術發展中心之第9屆政府代表董事。

科技部高分子學門計畫複審委員。

科技部重點補助大學特色領域研究中心指導委員。(2019)

經濟部「A+企業創新研發淬煉計畫」審查委員。104年度-迄今。

經濟部工業局「協助傳統產業技術開發計畫」審查委員暨類召集人。104年-迄今。

經濟部技術處法人科技專案計畫審查委員。104年度-迄今。

經濟部中小企業處SBIR計畫審查委員。2018年-迄今。

石化相關產業從事高度創新研究發展活動申請適用投資抵減辦法審查會議之審查委員。2018年-迄今。

經濟部工業局第5屆(2018)中堅企業民生化工類組審查委員。2018

第6屆(2018)國家產業創新獎-民生福祉領域審查委員。2018

 


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