TNAs/g-C_(3)N_(4)/Au NPs异质结同时作为光催化剂和SERS衬底:一种可回收的多功能检测平台

Quantitative Cyclic SERS Detection of Crystal Violet on g-C_(3)N_(4)Supported TiO_(2)Composite Substrate

新型掺杂异质结的TiO_(2)纳米管阵列(TNAs)被广泛用作污染物的光催化剂,其残留检测通常采用其他方法。该研究制备了一种新型的TNAs/g-C_(3)N_(4)/Au NPs异质结,可同时用作光催化剂和SERS衬底。成功降解了结晶紫染料,并用拉曼光谱法检测了其残留浓度。在10.0μmol·L^(-1)~100.0 pmol·L^(-1)范围内,拉曼强度与结晶紫浓度呈良好的线性关系,检出限为87.9 pmol·L^(-1)。制备的异质结用于废水处理和生物染色检测。在检测应用中,异质结在拉曼增强方面表现出良好的可循环性。计算出原始增强因子为7.43×10^(6),10次循环后EF略有下降,仍为6.17×10^(6)。

A novel TiO_(2)nanotube arrays/g-C_(3)N_(4)/Au NPs heterojunction was prepared and could be used as photocatalyst and SERS substrate simultaneously.Dye of crystal violet was successful degraded and the concentration of residue was detected by Raman spectroscopy.There was a good linear correlation between the Raman intensity and the concentration of crystal violet from 10.0μmol·L^(-1)~100.0pmol·L^(-1),and the limit of detection was 87.9pmol·L^(-1).Moreover,the prepared heterojunctions were used on waste water and bio staining detection.In the applications of detections,the heterojunctions were shown good recyclability on Raman enhancement.The original enhancement factor was calculated to be 7.43×10^(6),then the EF descent slightly and remained 6.17×10^(6)after ten cycles.