Calvo-Castañera Feliciano, Álvarez-Rodríguez Jesús, Candela Nuria, Maroto-Valiente Ángel
Dpto. de Química Inorgánica y Química Técnica, Facultad de Ciencias, UNED, Paseo Senda del Rey, 9, 28040 Madrid, Spain.
Escuela Superior de Ingeniería y Tecnología, Universidad Internacional de La Rioja (UNIR), Avenida de la Paz, 137, 26006 Logroño, Spain.
Nanomaterials (Basel). 2021 Jan 13;11(1):190. doi: 10.3390/nano11010190.
Novel hybrid materials with integrated catalytic properties and hydrophobic response, C@Fe-AlO hybrid samples, were presented and tested as catalysts for phenol reaction in aqueous solutions at atmospheric pressure and mild temperature conditions, using CO as a feedstock. A series of carbon-coated γ-alumina pellets (C@Fe-AlO) were synthesized and characterized by TGA, Brunauer-Emmett-Teller (BET) method, Raman spectroscopy, SEM, TEM, and XPS in order to get comprehensive knowledge of their properties at the nanoscale and relate them with their catalytic behavior. The results obtained correlated their catalytic activities with their carbon surface compositions. The application of these materials as active catalysts in the Kolbe-Schmitt reaction for CO conversion in aqueous media was proposed as an alternative reaction for the valorization of exhausts industrial effluents. In these early tests, the highest conversion of phenol was observed for the hybrid samples with the highest graphitic characteristic and the most hydrophobic behavior. Carboxylation products such as benzoic acid, p-hydroxybenzoic acid, and salicylic acid, have been identified under these experimental conditions.
提出了具有集成催化性能和疏水响应的新型杂化材料C@Fe - AlO杂化样品，并将其作为在大气压和温和温度条件下，以CO为原料的水溶液中苯酚反应的催化剂进行测试。合成了一系列碳包覆γ - 氧化铝颗粒（C@Fe - AlO），并通过热重分析（TGA）、布鲁诺尔-埃米特-泰勒（BET）法、拉曼光谱、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）对其进行表征，以便全面了解它们在纳米尺度上的性质，并将其与催化行为联系起来。获得的结果将它们的催化活性与其碳表面组成相关联。提出将这些材料作为活性催化剂应用于水介质中CO转化的科尔贝-施密特反应，作为工业废气资源化的替代反应。在这些早期测试中，对于具有最高石墨化特征和最疏水行为的杂化样品，观察到苯酚的转化率最高。在这些实验条件下，已鉴定出苯甲酸、对羟基苯甲酸和水杨酸等羧化产物。
