Titania-based, phosphorous-functionalized hybrids as photocatalysts for air purification

本项目的目的是利用中国科学院上海陶瓷研究所（SICCAS，即SIC-TiO2）开发的二氧化钛溶胶的复合磷光体功能化和杂化，以知识为基础设计先进的多功能二氧化钛光催化剂。在所有研究中，赢创工业公司（P25）的Aeroxide®P25将作为同等行业相关性的基准材料。为了实现这一雄心勃勃的目标，Doris Segets博士（德国FAU）在氧化物纳米颗粒表征和功能化方面的专业知识以及孙静教授（中国科学院，中国）在光催化方面的专业知识将结合在一起：1)制备荧光粉功能化杂化材料（PHM）；一种迄今尚未实现的新型光催化剂；i)在分子和颗粒尺度上量化PHMs的复杂表面化学；ii)将ii)的发现与气相和液相的光催化活性（PA）联系起来；在资助期结束时，不仅可以获得直接影响PM2.5（低于2.5 μ m的颗粒物）减少的最佳SIC-TiO2光催化剂。在深入了解i)颗粒表面性质，ii)颗粒与不同底物的相互作用以及iii)对PA的伴随效应的基础上，将推导出设计高效表面改性光催化剂的一般规则。因此，该项目将提供关于TiO2 PHM特性的独特数据，这些数据显然不能由任何一个申请人单独获得。在整个项目中，材料的复杂性将从单个磷（P-）功能化TiO2或与还原氧化石墨烯（RGO）杂交的TiO2逐步增加，直到P功能化的杂化物可用。从而系统地了解功能化过程中的表面性质（Hansen参数，Zeta电位），液相和气相中暗底物的吸附以及液相和气相中的光催化活性（PA）。总之，基础数据集将首次全面考虑颗粒尺寸，功能化，表面性质，杂交，杂交过程，气相与液相底物吸附和底物影响。除了明确先进的光催化剂外，还将深入了解决定性的影响因素及其复杂的相互作用。然而，这种独特的延伸只能通过颗粒处理和界面表征（D. Segets， FAU）以及光催化（J. Sun， SICCAS）的综合专业知识来实现。

Aim of this project is the knowledge based design of advanced, multifunctional TiO2 photocatalysts by combined phosphor functionalization and hybridization of a Titania sol developed at the Shanghai Institute of Ceramics of the Chinese Academy of Sciences (SICCAS, i.e. SIC-TiO2). Throughout all studies, Aeroxide® P25 from Evonik Industries (P25) will be used as benchmark material of equal industrial relevance. To achieve the highly ambitious goal, expertise of Dr. Doris Segets (FAU, Germany) on oxide nanoparticle characterization and functionalization as well as of Prof. Jing Sun (SICCAS, China) on photocatalysis will be combined to:i) Prepare phosphor functionalized hybrid materials (PHM), a new class of photocatalysts that has not been realized so farii) Quantify the complex surface chemistry of PHMs on the molecular as well as on the particle scaleiii) Link findings of ii) with photocatalytic activity (PA) in gas and liquid phaseAt the end of the funding period not only an optimum SIC-TiO2 photocatalyst that can directly make an impact to the reduction of PM2.5 (particulate matter below 2.5 µm) will be available. Based on the in-depth understanding of i) the particles surface properties, ii) the particles interaction with different substrates and iii) the concomitant effect on PA, general rules for the design of highly efficient, surface modified photocatalysts will be deduced. Thus, the project will provide unique data on TiO2 PHM properties that can clearly not be obtained by one of the applicants individually.Throughout the whole project, material complexity will be stepwise increased from individual phosphor (P-) functionalized TiO2 or hybridized TiO2 with reduced graphene oxide (RGO) until the P-functionalized hybrids are available. Thereby surface properties during functionalization (Hansen parameters, Zeta potentials), substrate adsorption in the dark in liquid and gas phase as well as photocatalytic activity (PA) in liquid and gas phase will be systematically understood.In conclusion, the underlying dataset will allow for the first time a holistic consideration of particle size, functionalization, surface properties, hybridization, hybridization process, gas vs. liquid phase substrate adsorption and substrate influence. In addition to a clearly advanced photocatalyst, in-depth understanding of the decisive influencing factors and their complex interplay will be available. This unique outreach can however only be achieved by the combined expertise on particle handling and interface characterization (D. Segets, FAU) as well as photocatalysis (J. Sun, SICCAS).