Titanium dioxide nanoparticles modified by salicylic acid and arginine: Structure, surface properties and photocatalytic decomposition of p-nitrophenol
Titanium dioxide nanoparticles modified by salicylic acid and arginine: Structure, surface properties and photocatalytic decomposition of p-nitrophenol
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DOI：
10.1016/j.apsusc.2015.12.044
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发表时间：
2016-02
影响因子：
6.7
通讯作者：
Lei Li;Yujie Feng;Youzhi Liu;Bing Wei;Guo Jiaxin;Weizhou Jiao;Zhaohan Zhang;Qiaoling Zhang
中科院分区：
文献类型：
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作者：
Lei Li;Yujie Feng;Youzhi Liu;Bing Wei;Guo Jiaxin;Weizhou Jiao;Zhaohan Zhang;Qiaoling Zhang
采用一种环境友好、简便的方法，用水杨酸（SA）和精氨酸（Arg）对二氧化钛（TiO 2）纳米粒子进行表面修饰，研究其键合结构、表面性质及对对硝基苯酚（PNP）的降解效果。X射线衍射仪（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）、Brunauer-Emmett-Teller（BET）、X射线光电子能谱（XPS）、傅里叶变换红外光谱（FT-IR）、水接触角（WCA）测量、X射线电位分析、紫外/可见漫反射光谱采用紫外-可见漫反射光谱（UV-vis DRS）和热重分析（TGA）对改性效果进行了评价。通过高效液相色谱法（HPLC）测定降解率。结果表明，SA/Arg与TiO 2表面形成了双齿键或桥键.用SA、Arg或两者进行表面改性可以改善亲脂性，降低zeta电位，并且还导致吸收波长的红移。用Arg或SA和Arg修饰的TiO 2纳米粒子具有较大的比表面积和孔容。此外，在可见光下的降解实验表明，精氨酸修饰是最有效的。这种简单而通用的合成方法，以生产TiO 2纳米粒子表面改性与各种有机封端剂，可用于新型多功能光催化剂，以满足各种应用在节能和环保。
In this study, titanium dioxide (TiO2) 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 TiO2surface. 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. TiO2nanoparticles 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 TiO2nanoparticles 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.