TY - JOUR
T1 - Titanium dioxide nanoparticles modified by salicylic acid and arginine
T2 - Structure, surface properties and photocatalytic decomposition of p-nitrophenol
AU - Li, Lei
AU - Feng, Yujie
AU - Liu, Youzhi
AU - Wei, Bing
AU - Guo, Jiaxin
AU - Jiao, Weizhou
AU - Zhang, Zhaohan
AU - Zhang, Qiaoling
N1 - Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2016/2/15
Y1 - 2016/2/15
N2 - In this study, titanium dioxide (TiO 2 ) nanoparticles were surface-modified with salicylic acid (SA) and arginine (Arg) using an environmentally friendly and convenient method, and the bonding structure, surface properties and degradation efficiency of p-nitrophenol (PNP) were investigated. X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FT-IR), water contact angle (WCA) measurements, ζ-potentiometric analysis, UV/visible diffuse reflectance spectroscopy (UV-vis DRS), and thermogravimetric analysis (TGA) were performed to evaluate the modification effect. The degradation rates were determined by high-performance liquid chromatography (HPLC). The results show that bidentate or bridging bonds are most likely formed between SA/Arg and TiO 2 surface. Surface modification with SA, Arg, or both can improve the lipophilic properties and decrease the zeta potential, and also result in a red shift of the absorption wavelength. TiO 2 nanoparticles modified by Arg or both SA and Arg show a large specific surface area and pore volume. Further, degradation experiments under visible light show that Arg modification is most efficient. This simple and versatile synthetic method to produce TiO 2 nanoparticles surface-modified with various organic capping agents can be used for novel multifunctional photocatalysts as required for various applications in energy saving and environmental protection.
AB - In this study, titanium dioxide (TiO 2 ) nanoparticles were surface-modified with salicylic acid (SA) and arginine (Arg) using an environmentally friendly and convenient method, and the bonding structure, surface properties and degradation efficiency of p-nitrophenol (PNP) were investigated. X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FT-IR), water contact angle (WCA) measurements, ζ-potentiometric analysis, UV/visible diffuse reflectance spectroscopy (UV-vis DRS), and thermogravimetric analysis (TGA) were performed to evaluate the modification effect. The degradation rates were determined by high-performance liquid chromatography (HPLC). The results show that bidentate or bridging bonds are most likely formed between SA/Arg and TiO 2 surface. Surface modification with SA, Arg, or both can improve the lipophilic properties and decrease the zeta potential, and also result in a red shift of the absorption wavelength. TiO 2 nanoparticles modified by Arg or both SA and Arg show a large specific surface area and pore volume. Further, degradation experiments under visible light show that Arg modification is most efficient. This simple and versatile synthetic method to produce TiO 2 nanoparticles surface-modified with various organic capping agents can be used for novel multifunctional photocatalysts as required for various applications in energy saving and environmental protection.
KW - Arginine
KW - Photocatalytic decomposition
KW - Salicylic acid
KW - Surface functionalization
KW - Surface properties
KW - Titanium dioxide
KW - p-Nitrophenol
UR - http://www.scopus.com/inward/record.url?scp=84957864825&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2015.12.044
DO - 10.1016/j.apsusc.2015.12.044
M3 - Article
AN - SCOPUS:84957864825
SN - 0169-4332
VL - 363
SP - 627
EP - 635
JO - Applied Surface Science
JF - Applied Surface Science
ER -