The influence of several reactional parameters was investigated on the photocatalytic reduction of benzophenone to the pharmaceutical precursor benzhydrol under UVA-LED radiation. The optical semiconductor titanium dioxide was loaded with 1.0 wt.% of noble metals (Pd, Pt and Au) by incipient wetness impregnation method. The TiO₂-based materials were characterized by various techniques. Results showed that the benzhydrol selectivity is highly influenced by the nature of the solvent and the presence of KOH (acting as nucleophilic agent). The most efficient system was obtained using 2-propanol, 5.0 mM of KOH and 0.1 g L⁻¹ of catalyst, achieving 100 % selectivity of benzhydrol after 10 min reaction. Among the TiO₂-based materials, the Pd/TiO₂ showed high efficiency for benzhydrol formation (in absence KOH) with an enhancing of c.a. 49 % compared with neat TiO₂. The decrease of photoluminescence intensity observed for Pd/TiO₂ material suggests an effective electron transfer from TiO₂ to Pd nanoparticles.

在UVA-LED辐射下，研究了几个反应参数对二苯甲酮光催化还原为药物前体苯甲醇的影响。光学半导体二氧化钛负载1.0重量％。初期湿润浸渍法测定的贵金属（Pd，Pt和Au）的％。TiO ₂基材料通过各种技术进行了表征。结果表明，苯酚的选择性受溶剂的性质和KOH（作为亲核试剂）的存在的影响很大。使用2-丙醇，5.0 mM的KOH和0.1 g L ^-1的催化剂可获得最有效的系统，反应10分钟后，苯甲醇的选择性达到100％。TiO _2中基于Pd / TiO ₂的材料，与纯TiO ₂相比，苯甲酸的形成效率高（在没有KOH的情况下），其效率提高了约49％。对于Pd / TiO ₂材料观察到的光致发光强度的降低表明从TiO ₂到Pd纳米粒子的有效电子转移。