Zn_1-xTi_xO NPs were efficiently synthesized using a simple solution free mechanochemical method. The synthesized ZnO and Ti(IV)-doped ZnO catalysts are exhibited polycrystallinity, a hexagonal crystal structure, and roughly spherical agglomerates. The surface areas of the Zn_1-xTi_xO catalysts were positively correlated with the doping percentage of Ti(IV), which also enhanced the Lewis acidity of the NPs. The catalysts exhibited excellent activity during the synthesis of fluorescein dyes. This methodology was also extended to sulfone-fluorescein dye synthesis.

中文翻译：

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Ti（IV）掺杂：在荧光素染料合成中提高ZnO催化剂的Lewis酸性性能的有效策略

Zn _1-x Ti _x O NPs是使用简单的无溶液机械化学方法有效合成的。合成的ZnO和Ti（IV）掺杂的ZnO催化剂具有多晶性，六方晶体结构和大致球形的团聚体。Zn _1-x Ti _x O催化剂的表面积与Ti（IV）的掺杂百分比呈正相关，这也增强了NP的Lewis酸度。该催化剂在荧光素染料的合成过程中表现出优异的活性。该方法还扩展到砜-荧光素染料的合成。