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光催化水處理與氧還原的研究
時(shí)間：2019-06-11
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主講人：龍明策 教授
時(shí)間：2019年6月13日 上午11：00
地點(diǎn)： 材料化學(xué)工程國(guó)家重點(diǎn)實(shí)驗(yàn)室大樓四樓中庭報(bào)告廳
主講人介紹：
龍明策，男，工學(xué)博士，上海交通大學(xué)環(huán)境科學(xué)與工程學(xué)院研究員，博士生導(dǎo)師。1999年畢業(yè)于哈爾濱工業(yè)大學(xué)應(yīng)用化學(xué)系，2007年獲上海交通大學(xué)環(huán)境工程博士學(xué)位，2006和2013年分別在德國(guó)埃爾蘭根-紐倫堡大學(xué)和美國(guó)萊斯大學(xué)訪(fǎng)學(xué)。主要研究方向?yàn)橛袡C(jī)污染控制的光催化與化學(xué)氧化技術(shù)。作為項(xiàng)目負(fù)責(zé)人承擔(dān)國(guó)家自然科學(xué)基金、農(nóng)業(yè)部行業(yè)科研專(zhuān)項(xiàng)、重點(diǎn)研發(fā)專(zhuān)項(xiàng)、上海市科委項(xiàng)目等10余項(xiàng)，在ACS Nano、Appl Catal B、Environ Sci Technol等刊物共發(fā)表SCI論文76篇，被引3537次，H因子27，授權(quán)專(zhuān)利16項(xiàng)。目前任Nano-Micro Letters編委和Chinese Journal of Catalysis青年編委。
主要內(nèi)容：
Lead chromate pigments are included in a group of the most widely used pigments, which account for 3% of worldwide lead consumption. This study reports the photoactivity of commercial lead chromate pigment (i.e., chrome yellow) under simulated sunlight. It underwent photodissolution in the presence of organic acid and dissolved organic matter in the aqueous phase, releasing Pb(II) and Cr(III). Pb(II) was released more readily than Cr(III) which mainly formed hydroxides and oxides. The photodissolution can be activated by light with a wavelength <514 nm. the reaction is mediated by the reduction of cr(vi) in the pigment by self-generated electrons. the kinetics were mainly affected by the electron-hole separation efficiency which can be enhanced by electron donors. the reaction rate decreases with increasing solution ph as the photodissolution process consumes protons. the photodissolution of the chrome yellow pigment was further confirmed in a river water sample under natural sunlight, with 11.28% of lead and 2.56% of chromium released in 7 h. this study highlights the importance of considering photochemical processes in risk assessments and regulations of commercial semiconductor pigments, which are currently based on their solubility.
主辦單位：材料化學(xué)工程國(guó)家重點(diǎn)實(shí)驗(yàn)室
