J.Phys.D 論文推薦

Miguel Comesa?a 及其同事在最新的論文中介紹了一種利用光催化降解處理污水的可能方案。該論文刊登在 J. Phys. D 的電磁活性納米粒子的生物學應用特刊中（論文信息見文末）。

撰文 Dean Williams

翻譯 許雅瀾

審校 卓思琪

從現代工業化開始至今，人類活動對水質產生了巨大影響，導致全球水生態系統的污染和惡化。在眾多污染物中，源自農業和紡織業的多環芳香類分子因其存在致癌可能，尤為臭名昭著。如今，各方正努力減少水污染對環境和公眾健康帶來的負面影響。

為此，研究者將目光投向了納米複合材料，欲使它能利用可持續能源——陽光來降解水中的污染物，並在複雜的環境中（比如在污水處理廠的角角落落）選擇性地作用於特定的污染物。沿著這一思路，研究者製備了由兩種材料組合而成的雜化納米結構。其中一種材料為半導體，它能在紫外照射下催化降解水體污染物；另一種是光敏劑，它能幫助半導體材料在更寬的光譜範圍內保持光催化活性。

a.該材料的合成和光催化機理圖示；b.雜化納米材料的電子顯微鏡表徵；c.多環芳香類污染物的選擇性光催化降解（圖片來源：論文原文）

確切地說，這種雜化複合材料為飾有納米金粒子（等離子態）的鈦酸鈉納米管，它結合了鈦酸鈉納米管的選擇性光催化性能與納米金粒子吸收可見光和近紅外光的能力。研究結果表明，這種組合很有潛力發展成為一項具有選擇性的環境修復技術。

文章來源

論文信息

【題目】Au-decorated sodium titanate nanotubes as high-performance selective photocatalysts for pollutant degradation

【作者】Waleed M A El Rouby, Miguel Comesa?a-Hermo, Martín Testa-Anta, Enrique Carbó-Argibay, Verónica Salgueiri?o, Moisés Pérez-Lorenzo and Miguel A Correa-Duarte

【刊期】Journal of Physics D: Applied Physics, Volume 50, Number 14?

【日期】Published 8 March 2017

【摘要】The bioaccumulation of polycyclic aromatic compounds originating from textile processing industries is nowadays a major environmental problem worldwide. In order to tackle this situation, several inorganic semiconductors have been tested as photocatalysts for the degradation of these harmful pollutants in the search of sustainable and cost-effective solutions. Nevertheless, these semiconductor materials often involve important limitations, such as poor efficiency and selectivity, which, in the end, substantially restrict their implementation at the industrial scale. As an alternative, we herein report the fabrication and application of Au-decorated titanate nanotubes (TNTs) as high-performance architectures for the selective degradation of organic contaminants. This synthetic strategy is intended to establish a synergetic integration of the physicochemical and photocatalytic features of these hybrid nanostructures, by combining the remarkable adsorption capabilities of TNTs with the enhanced light-harvesting efficiency provided by the incorporation of a noble metal component. The obtained results evidence the great potential that rationally designed plasmonic composites may have for the development of selective environmental remediation technologies and in particular on the current challenges faced by the wastewater treatment sector.

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