文章信息/Info

Title:

Progress of Facet-Controlled and Novel Nanostructured Titanium Dioxide

作者:

姚霞喜1; 2; 王文壽2

1.常熟理工學(xué)院化學(xué)與材料工程學(xué)院，江蘇 常熟 215500
2.山東大學(xué) 國家膠體材料工程技術(shù)研究中心，山東 濟(jì)南 250100

Author(s):

YAO Xiaxi1; 2;  WANG Wenshou2

1.School of Chemistry and Materials Engineering, Changshu Institute of Technology, Changshu 215500, China
2.National Engineering Research Center for Colloidal Materials, Shandong University, Jinan 250100, China

關(guān)鍵詞:

TiO2; 晶面調(diào)控; 納米結(jié)構(gòu); 光催化; 光還原活性

Keywords:

TiO2;  facet; controlled; nanostructure; photocatalysis; photoreductive activity

DOI:

10.7502/j.issn.1674-3962.2017.11.07

文獻(xiàn)標(biāo)志碼:

A

摘要:

太陽能光催化技術(shù)在緩解環(huán)境污染壓力和能源危機(jī)方面有著重要的應(yīng)用前景，納米結(jié)構(gòu)TiO2以其催化活性高、穩(wěn)定性好、環(huán)境友好等特點(diǎn)在光催化領(lǐng)域受到廣泛關(guān)注。近期研究表明，銳鈦礦TiO2不同晶面能夠有效地促進(jìn)光激發(fā)載流子的空間分離轉(zhuǎn)移。銳鈦礦TiO2中光激發(fā)產(chǎn)生的電子傾向于遷移至（101）表面，而空穴則移動至（001）表面，從而通過晶面調(diào)控即可實(shí)現(xiàn)光生載流子的定向轉(zhuǎn)移。另外，銳鈦礦TiO2介晶是一類具有特殊結(jié)構(gòu)和性質(zhì)的納米材料，其高的結(jié)晶性和大的比表面積有利于光催化反應(yīng)的進(jìn)行，多級TiO2納米結(jié)構(gòu)和具有特殊活性的TiO2也是目前研究的一個趨勢。綜述了幾種高能量晶面暴露銳鈦礦TiO2納米晶、銳鈦礦TiO2介晶以及多級復(fù)雜納米結(jié)構(gòu)TiO2的合成，分析了光催化劑結(jié)構(gòu)對光催化性能的影響，重點(diǎn)探討了晶面調(diào)控TiO2光催化的機(jī)理，總結(jié)了新興發(fā)展的光還原活性TiO2的合成及其在可逆光致變色體系和光打印可擦寫紙張領(lǐng)域的新型應(yīng)用。

Abstract:

Solar photocatalysis has the potential applications for the control of environmental pollution and the alleviation of energy crisis. Nanostructured TiO2 has attracted an extensive attention owing to its good activity, high stability, and nontoxicity. Recently, anatase TiO2 with exposed high�瞖nergy facets can efficiently promote the separation of photoexcited charge carriers. The photo�瞚nduced electrons in anatase TiO2 tend to migrate to (101) facets, while photoexcited holes transfer to (001) facets. In addition, anatase TiO2 mesocrystals are one kind of nanomaterials with special structures and properties. High crystallity and large surface area of mesocrystals are favorable for the photocatalysis. Furthermore, researchers also focus on hierarchical or highly active TiO2. This review summarized the synthesis of several nanostructured TiO2 with high�瞖nergy facets, anatase TiO2 mesocrystals and hierarchical TiO2, analyzed the effect of morphology on the photocatalytic activity, discussed the photocatalytic mechanism of TiO2 with different exposed facets, and presented the synthesis of anatase TiO2 nanoparticles with photoreductive activity and their application in photoreversible color switching and rewritable paper.