Details

Autor(en) / Beteiligte

• Wang, Yanfen
• Zhang, Miao
• Yu, Hai
• Zuo, Yong
• Gao, Juan
• He, Gang
• Sun, Zhaoqi

Titel

Facile fabrication of Ag/graphene oxide/TiO2 nanorod array as a powerful substrate for photocatalytic degradation and surface-enhanced Raman scattering detection

Ist Teil von

• Applied catalysis. B, Environmental, 2019-09, Vol.252, p.174-186

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •A novel Ag/GO/TNR substrate was obtained by a facile three step route.•Effect of GO interlayer on the microstructure, adsorption capacity and Raman signals of substrates was investigated.•Ag/GO/TNR substrate showed the high SERS sensitivity and good uniformity.•Ag/GO/TNR substrate demonstrated the outstanding photocatalytic ability and good reusability in SERS detection. A novel graphene oxide/TiO2 nanorod array (GO/TNR) decorated with Ag nanoparticles (NPs) is successfully prepared as a photocatalyst and a surface-enhanced Raman scattering (SERS) substrate for organic molecule detection. The as-obtained Ag/GO/TNR sample exhibited a large specific surface area and high adsorption capacity toward Rhodamine 6G (R6G) molecules. Moreover, the GO interlayer with suitable content had a significant effect on the absorption intensity of light and Raman signals for the Ag/GO/TNR substrate. For R6G as probe molecules, the Ag/GO/TNR substrate with 5 min of GO-deposition achieved a lower detection limit of 1.0 × 10−12 M and an improved enhancement factor (EF) of 5.86 × 105 as compared to other films. Furthermore, the relative standard deviation (RSD) value of the Raman vibration at 1650 cm−1 cm was approximately 8.71%, and the good uniformity remained. Using Xenon lamp irradiation, the outstanding photocatalytic ability endowed the substrate with good self-cleaning and reusable properties. Based on the above results, a synergistic effect of three components (Ag NPs, GO interlayer, and TNR) is proposed to produce an excellent SERS performance, namely, a large adhesion area, the interaction of excited photons, and high-density hotspots in the active substrate.