Copper oxide (CuO) nanocatalyst supported on zeolite-Y appeared as an excellent solid phase catalyst for promoting different oxidation, reduction, and C–C bond formation reactions. The ultrafine zeolite Y supported CuO nanocatalyst selectively produced different derivatives of benzimidazoles in absence of any acids. Selective catalytic oxidation of various benzyl alcohols to the corresponding benzaldehydes was achieved under solvent-free condition using benzimidazole as the proton abstracting source. Under similar condition reduction of benzaldehyde to benzyl alcohols and the nitro-aldol condensation reaction was achieved within a very limited period through the grinding process. CuO–Y served as a suitable catalyst for the selective formation of aldehydes, alcohols, nitro-aldols, and derivatives of benzimidazole. One of the significant advantages of this technique was the non-requirement of any toxic acids, reducing agents like NaBH₄, hydrazine hydride. All the reactions occurred with high yield and selectivity in absence of any solvent. Isopropanol was used as the internal reducing agent during aldehyde reduction eliminating toxic chemicals like NaBH₄. More promisingly the catalyst was able to reduce selectively one aldehydic group in presence of the other such as terephthaldehyde. Some of the salient features of the process were the control oxidation of benzyl alcohol with H₂O₂ under mechanochemical condition, room temperature reduction of benzaldehyde without the formation of toluene. The change in the crystallite size of zeolite-Y was believed to play a crucial role in bringing high selectivity in the catalytic oxidation and reduction process.

负载在沸石-Y 上的氧化铜 (CuO) 纳米催化剂是一种极好的固相催化剂，用于促进不同的氧化、还原和 C-C 键形成反应。超细沸石 Y 负载的 CuO 纳米催化剂在没有任何酸的情况下选择性地产生不同的苯并咪唑衍生物。使用苯并咪唑作为质子提取源，在无溶剂条件下实现了各种苯甲醇选择性催化氧化成相应的苯甲醛。在类似的条件下，通过研磨过程在非常有限的时间内实现了苯甲醛还原为苯甲醇和硝基-羟醛缩合反应。CuO-Y 是选择性形成醛、醇、硝基羟醛和苯并咪唑衍生物的合适催化剂。₄、氢化肼。所有反应均在不存在任何溶剂的情况下以高产率和选择性发生。在醛还原过程中使用异丙醇作为内部还原剂，以消除 NaBH ₄等有毒化学物质。更有希望的是，该催化剂能够在另一个醛基团（例如对苯二醛）存在下选择性地还原一个醛基团。该方法的一些显着特点是在机械化学条件下控制苯甲醇与 H ₂ O _{2 的}氧化，在室温下苯甲醛还原不形成甲苯。沸石-Y 微晶尺寸的变化被认为在催化氧化和还原过程中带来高选择性方面起着至关重要的作用。