Multifunctional Au-Coated TiO2 Nanotube Arrays as Recyclable SERS Substrates for Multifold Organic Pollutants Detection
Multifunctional Au-Coated TiO2 Nanotube Arrays as Recyclable SERS Substrates for Multifold Organic Pollutants Detection
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DOI：
10.1002/adfm.201000792
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发表时间：
2010-09-09
影响因子：
19
通讯作者：
Liu, Jinhuai
中科院分区：
文献类型：
--
作者：
Li, Xuanhua;Chen, Guangyu;Liu, Jinhuai
通过ZnO模板合成TiO2纳米管阵列，分别采用光催化沉积法和水热沉积法在TiO2表面沉积Au颗粒，制备了多功能Au包覆TiO2纳米管阵列。该阵列具有较高的检测灵敏度、重复性和稳定性。此外，由于阵列具有稳定的催化性能，在紫外光照射下，利用表面增强拉曼光谱（SERS）检测，可以将吸附在基体上的靶分子光催化降解为无机小分子，从而实现自身清洁，从而实现回收利用。最后，通过对罗丹明6G （R6G）染料、除草剂4-氯酚（4-CP）、持久性有机污染物（POP）二氯苯氧乙酸（2,4- d）和有机磷农药甲基对硫磷（MP）的检测，发现其独特的可回收性能为消除传统SERS底物的一次性使用问题开辟了一条新途径，并在检测其他有机污染物方面具有广阔的应用前景。
A multifunctional Au-coated TiO2 nanotube array is made via synthesis of a TiO2 nanotube array through a ZnO template, followed by deposition of Au particles onto the TiO2 surface using photocatalytic deposition and a hydrothermal method, respectively. Such arrays exhibit superior detection sensitivity with high reproducibility and stability. In addition, due to possessing stable catalytic properties, the arrays can clean themselves by photocatalytic degradation of target molecules adsorbed to the substrate under irradiation with UV light into inorganic small molecules using surface-enhanced Raman spectroscopy (SERS) detection, so that recycling can be achieved. Finally, by detection of Rhodamine 6G (R6G) dye, herbicide 4-chlorophenol (4-CP), persistent organic pollutant (POP) dichlorophenoxyacetic acid (2,4-D), and organophosphate pesticide methyl-parathion (MP), the unique recyclable properties indicate a new route in eliminating the single-use problem of traditional SERS substrates and show promising applications for detecting other organic pollutants.