High-Throughput Synthesis and Screening of Titania-Based Photocatalysts.
High-Throughput Synthesis and Screening of Titania-Based Photocatalysts.
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DOI：
10.1021/acscombsci.5b00049
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发表时间：
2015-09
影响因子：
--
通讯作者：
N. Nursam;Xingdong Wang;R. Caruso
中科院分区：
文献类型：
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作者：
N. Nursam;Xingdong Wang;R. Caruso
二氧化钛被广泛认为是一种重要的光催化剂材料，在过去的几十年里，这一领域的研究大幅增加。然而，TiO 2的光活性受到几个因素的阻碍，例如相对较高的光生电子-空穴复合速率和1.33eV的宽带隙，使其在可见光下不活跃。通过改变其形态或化学性质来优化TiO 2光催化剂的方法已经进行了许多年，但这种半导体的进一步改性具有产生具有优异性能和更高光催化活性的光催化剂的潜力。这可以有效地探索使用组合合成加上高通量表征方法。这种方法已被广泛应用于发现新的功能材料，包括光催化剂。通过使用高通量合成和表征技术，可以加速小样品规模的材料制备和筛选;因此，可以更快地获得具有增强的光催化活性的新型TiO 2基光催化剂。此外，正在系统研究的材料的大型数据库将极大地建立我们对材料结构/组成与光催化活性之间关系的基本理解。这篇综述详细介绍了各种高通量的合成和表征技术，应用于提高TiO 2材料的光催化性能，并讨论了几个挑战，已经提出或可能会遇到在未来使用这种方法时。
Titanium dioxide is widely known as a prominent photocatalyst material and research in this area has increased substantially over the last decades. However, the photoactivity of TiO2 is hindered by several factors, such as a relatively high photogenerated electron-hole recombination rate and a wide bandgap of ∼ 3.2 eV, rendering it inactive under visible light. Approaches to optimize the TiO2 photocatalyst, either by altering its morphological or chemical properties, have been conducted for many years, yet further modification of this semiconductor has the potential to yield photocatalysts with excellent properties and higher photocatalytic activity. This could be effectively explored using combinatorial synthesis coupled with high-throughput characterization approaches. Such an approach has been widely applied for the discovery of new functional materials, including photocatalysts. By using high-throughput synthesis and characterization technology, preparation and screening of materials on small sample scales can be accelerated; hence, new TiO2-based photocatalysts with enhanced photocatalytic activity can be acquired more rapidly. Additionally, the large database of materials being systematically examined will greatly build our fundamental understanding of the relation between materials structure/composition and photocatalytic activity. This review details various high-throughput syntheses and characterization techniques applied to improve the photocatalytic properties of TiO2 materials and discuss several challenges that have been raised or may be encountered in the future when using this approach.