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

该项目的目的是先进的，多功能的二氧化钛光催化剂的知识为基础的设计相结合的磷光体功能化和杂化的二氧化钛溶胶在中国科学院上海陶瓷研究所（SICCAS，即SIC-TiO 2）。在所有研究中，Evonik Industries的Aeroxide® P25（P25）将用作具有同等工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（FAU，德国）在氧化物纳米颗粒表征和功能化方面的专业知识以及Jing Sun教授（SICCAS，中国）在纳米材料方面的专业知识将结合起来： 制备磷光体功能化杂化材料（PHM），这是迄今尚未实现的一类新型光催化剂 在分子和颗粒尺度上量化PHM的复杂表面化学iii） 将ii）的研究结果与气相和液相中的光催化活性（PA）联系起来在资助期结束时，不仅可以获得可以直接影响PM2.5（2.5 µm以下的颗粒物）减少的最佳SIC-TiO 2光催化剂。基于对i）颗粒表面性质，ii）颗粒与不同基底的相互作用以及iii）对PA的伴随影响的深入理解，将推导出高效表面改性光催化剂设计的一般规则。在整个项目中，材料的复杂性将从单独的磷光体（P-）官能化的TiO 2或具有还原氧化石墨烯（RGO）的杂化TiO 2逐步增加，直到P-官能化的杂化物可用。从而在官能化过程中的表面性质（汉森参数，Zeta电位），基质在黑暗中在液相和气相中的吸附以及液相和气相中的光催化活性（PA）将得到系统的理解。总之，底层数据集将首次允许对颗粒尺寸，功能化，表面性质，杂化，杂化过程，气相对液相基质吸附和基质影响。除了明显先进的光催化剂外，还可以深入了解决定性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的综合专业知识来实现（D。Segets，FAU）以及J. Sun，SICCAS）。

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).