新型二维TiSe2纳米片的可控合成及其生长机理  

Controllable Synthesis and Growth Mechanism of Two-dimensional TiSe2 Nanosheets

作　　者：焦思怡 葛万银 殷立雄[1] 徐美美 常哲 张荔 JIAO Si-Yi;GE Wan-Yin;YIN Li-Xiong;XU Mei-Mei;CHANG Zhe;ZHANG Li(Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, School of Materials Science andEngineering, Shaanxi University of Science and Technology, Xi’an 710021, China)

机构地区：[1]陕西科技大学材料科学与工程学院陕西省无机材料绿色制备与功能化重点实验室

出　　处：《无机材料学报》2019年第8期834-838,共5页Journal of Inorganic Materials

基　　金：陕西科技大学科研启动基金(2016XSGG03)~~

摘　　要：溶液法是一种反应温和、易控制且常用的合成方法。目前已报道的溶液法制备TiSe2时通常采用三辛基膦(TOP)为溶剂,但这种试剂有毒,对人体和环境都有潜在的危害。本研究通过简单的、无TOP的溶液法成功地制备了单分散的六边形TiSe2纳米片,并通过调整反应时间研究TiSe2纳米片的形貌演变规律。利用XRD、SEM、EDS和紫外-可见漫反射对其物相、形貌、元素以及光学性能进行了系统的表征;根据SEM结果对其生长过程及形貌演变规律进行了研究,并提出一种螺旋状逐层生长的机理;分析考察了TiSe2纳米片对罗丹明B(RhB)的光催化活性,发现其具有高于P25的降解能力,这表明TiSe2纳米片作为光催化材料具有广阔的应用前景。Solution method is a mild, controllable and commonly used synthetic method. However, the reported solution methods for the preparation of TiSe2 nanosheets usually use trioctylphosphine(TOP) as solvent. TOP is poisonous and potentially harmful to the human body as well as the environment. In this paper, hexagonal TiSe2 nanosheets were synthesized by simple solution method without TOP. The shape evolution of TiSe2 nanosheets was investigated by adjusting the reaction time. The crystal phase, morphology, elements, and the optical property of TiSe2 nanosheets were characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), energy dispersive X-ray spectroscopy(EDS), and UV-Vis spectroscopy, respectively. The spiral growth steps can be clearly observed in SEM images. A spiral layer by layer growth mechanism was proposed based on the morphology evolution of TiSe2 nanosheets. The photocatalytic activity of TiSe2 nanosheets was evaluated by the degradation of RhB under sun light irradiation. Compared with the commercial P25, the as-prepared TiSe2 nanosheets exhibit a superior photocatalytic activity, which indicates that TiSe2 nanosheets are promising candidate as photocatalytic material for environmental protection.

关 键 词：TiSe2纳米片 微观结构 生长机理 光催化性能 

分 类 号：TQ174[化学工程—陶瓷工业]