Abstract Novel Mo-V-PMMA and Mo-V-PS catalysts are prepared by addition of hard polymethyl methacrylate (PMMA) and polystyrene (PS) nanospheres into Mo/V compounds in the preparation process, respectively. The catalytic tests in selective oxidation of acrolein reveal that Mo-V-PMMA catalyst shows very high acrolein conversion (99.1%) and the yield of acrylic acid (90.7%). The BET, DLS, SAXS, XRD, XPS, H 2 -TPR and NH 3 -TPD measurements reveal that the addition of PMMA and PS nanospheres causes the obvious changes of porous structure, crystal phases composition and chemical properties of catalysts. These differences between Mo-V-PMMA and Mo-V-PS catalysts are attributed to the totally different “real” nano–environment during heat treatment in the high–concentration component mixture. PS nanospheres are in a state of adhesion or agglomeration or not uniformly distributed in the active component solution, while PMMA nanospheres with much better hydrophilicity and monodispersed state promote Mo and V ions more easily and uniformly dispersed in the mixture. Graphic abstract Novel Mo-V catalysts are prepared by addition of hard polymethyl methacrylate (PMMA) and polystyrene (PS) nanospheres into Mo/V mixture. Obvious changes of porous structure, crystal phases and chemical properties of catalysts are caused by the nanospheres introduction, showing very high acrolein conversion (99.1%) and the yield of acrylic acid (90.7%) in selective oxidation of acrolein.

中文翻译：

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以纳米球为模板的新型 Mo-V 氧化物催化剂，用于将丙烯醛选择性氧化为丙烯酸

摘要 通过在制备过程中将硬质聚甲基丙烯酸甲酯（PMMA）和聚苯乙烯（PS）纳米球分别加入Mo/V化合物中，制备了新型Mo-V-PMMA和Mo-V-PS催化剂。丙烯醛选择性氧化的催化试验表明，Mo-V-PMMA催化剂表现出非常高的丙烯醛转化率（99.1%）和丙烯酸产率（90.7%）。BET、DLS、SAXS、XRD、XPS、H 2 -TPR 和NH 3 -TPD 测量表明，PMMA 和PS 纳米球的加入导致催化剂的多孔结构、晶相组成和化学性质发生明显变化。Mo-V-PMMA 和 Mo-V-PS 催化剂之间的这些差异归因于在高浓度组分混合物中热处理过程中完全不同的“真实”纳米环境。PS纳米球在活性成分溶液中呈粘附或团聚或分布不均匀的状态，而亲水性好得多且呈单分散状态的PMMA纳米球更容易使Mo和V离子更容易均匀地分散在混合物中。图形摘要 新型 Mo-V 催化剂是通过将硬聚甲基丙烯酸甲酯 (PMMA) 和聚苯乙烯 (PS) 纳米球添加到 Mo/V 混合物中制备的。纳米球的引入使催化剂的多孔结构、晶相和化学性质发生明显变化，表现出非常高的丙烯醛转化率（99.1%）和丙烯醛选择性氧化的丙烯酸产率（90.7%）。而具有更好亲水性和单分散状态的 PMMA 纳米球更容易和更均匀地促进 Mo 和 V 离子分散在混合物中。图形摘要 新型 Mo-V 催化剂是通过将硬聚甲基丙烯酸甲酯 (PMMA) 和聚苯乙烯 (PS) 纳米球添加到 Mo/V 混合物中制备的。纳米球的引入使催化剂的多孔结构、晶相和化学性质发生明显变化，表现出非常高的丙烯醛转化率（99.1%）和丙烯醛选择性氧化的丙烯酸产率（90.7%）。而具有更好亲水性和单分散状态的 PMMA 纳米球更容易和更均匀地促进 Mo 和 V 离子分散在混合物中。图形摘要 新型 Mo-V 催化剂是通过将硬聚甲基丙烯酸甲酯 (PMMA) 和聚苯乙烯 (PS) 纳米球添加到 Mo/V 混合物中制备的。纳米球的引入使催化剂的多孔结构、晶相和化学性质发生明显变化，表现出非常高的丙烯醛转化率（99.1%）和丙烯醛选择性氧化的丙烯酸产率（90.7%）。