Synthesis of TiO(2NWS)@Au(NPS) Composite Catalyst for Methylene Blue Removal.
Synthesis of TiO(2NWS)@Au(NPS) Composite Catalyst for Methylene Blue Removal.
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TiO2NWS@AuNPS复合去除亚甲基蓝催化剂的合成
DOI：
10.3390/ma11061022
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发表时间：
2018-06-15
期刊：
影响因子：
--
通讯作者：
Chen Y
中科院分区：
文献类型：
--
作者：
Fu F;Wang F;Li T;Jiao C;Zhang Y;Chen Y
本文采用一步法合成了hbp - nh2修饰的二氧化钛纳米线（TiO2NWS）修饰的金纳米粒子（TiO2NWS@AuNPS）。研究了HBP-NH2浓度在tio2 - nws形成中的作用。从氨基端端超支化聚合物（HBP-NH2）中吸收氨基，提高了纯TiO2NWS的细度和均匀性。采用透射电镜（TEM）、x射线衍射（XRD）和傅里叶红外光谱（FTIR）对TiO2NWS和TiO2NWS@AuNPS的形貌和晶体结构进行了表征。用x射线光电子能谱（XPS）分析了金、钛和氧的化学状态。结果表明：当HBP-NH2浓度为100 g/L时，TiO2NWS的平均直径接近72 nm， Au纳米颗粒均匀分布在TiO2NWS表面；AuNPS的存在改善了TiO2NWS在紫外光照射下的光催化性能。Au负载提高了光电子的利用率，活化了吸附的氧。所得TiO2NWS@AuNPS经紫外光照射300 min后，亚甲基蓝（MB）降解率为99.6%。经过5个循环的催化过程后，TiO2NWS@AuNPS对MB的催化能力仍保持在90%以上。研究发现，金的沉积是TiO2NWS@AuNPS具有高催化活性的原因。
In this article, HBP-NH2-modified titania nanowire (TiO2NWS)-decorated Au nanoparticles (TiO2NWS@AuNPS) were synthesized by one-step method. The role of HBP-NH2 concentration in the formation of TiO2NWS was investigated. The fineness and uniformity of pure TiO2NWS were enhanced by absorbed amino groups from amino-terminated hyperbranched polymer (HBP-NH2). The morphology and crystal structure of TiO2NWS and TiO2NWS@AuNPS were examined by transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fournier transform infrared (FTIR) spectroscopy. The chemical states of gold, titanium and oxygen were analyzed by X-ray photoelectron spectroscopy (XPS). The results showed that at the concentration of HBP-NH2 100 g/L, the mean diameter of TiO2NWS was nearly 72 nm and Au nanoparticles were uniformly distributed on the surface of TiO2NWS. The presence of AuNPS improved the photocatalytic properties of TiO2NWS under UV light irradiation. The Au load was believed to improve the utilization rate of the photoelectron and activated the adsorbed oxygen. The obtained TiO2NWS@AuNPS decomposed 99.6% methylene blue (MB) after 300 min when subjected to UV light irradiation. After five cycles of the catalyzing process, the TiO2NWS@AuNPS still retained over 90% of its catalytic ability for MB. The Au deposition was found responsible for the high catalytic activity of TiO2NWS@AuNPS.
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影响因子：
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