College of Textiles and Clothing, Qingdao University, Qingdao 266071, China.
College of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China.
Molecules. 2023 May 8;28(9):3957. doi: 10.3390/molecules28093957.
Exploration of highly efficient and robust catalyst is pivotal for electrocatalytic degradation of dye wastewater, but it still is a challenge. Here, we develop a three-dimensional self-supported SnO-MnO hybrid nanosheets grown on carbon cloth (noted by SnO-MnO@CC) electrode via a simple hydrothermal method and annealing treatment. Benefitting from the interlaced nanosheets architecture that enlarges the surface area and the synergetic component effect that accelerates the interfacial electronic transfer, SnO-MnO@CC electrode exhibits a superior electrocatalytic degradation efficiency for cationic blue X-GRRL dye in comparison with the single metal oxide electrode containing SnO@CC and MnO@CC. The degradation efficiency of cationic blue X-GRRL on SnO-MnO@CC electrode can reach up to 97.55% within 50 min. Furthermore, self-supported architecture of nanosheets on carbon cloth framework contributes to a robust stability compared with the traditional electrode via the multiple dip/brush coating accompanied by the thermal decomposition method. SnO-MnO@CC electrode exhibits excellent recyclability, which can still retain a degradation efficiency of 94.12% after six cycles. This work may provide a new pathway for the design and exploration of highly efficient and robust electrooxidation catalysts for dye degradation.
探索高效稳定的催化剂对于电催化降解染料废水至关重要，但这仍然是一个挑战。在这里，我们通过简单的水热法和退火处理，在碳布上生长了三维自支撑的 SnO-MnO 杂化纳米片（记为 SnO-MnO@CC）电极。得益于交错纳米片结构增大了表面积和协同成分效应加速了界面电子转移，SnO-MnO@CC 电极在电催化降解阳离子蓝色 X-GRRL 染料方面表现出优于含 SnO@CC 和 MnO@CC 的单一金属氧化物电极的性能。阳离子蓝色 X-GRRL 在 SnO-MnO@CC 电极上的降解效率在 50 分钟内可达 97.55%。此外，与传统的通过多次浸涂/刷涂结合热分解方法制备的电极相比，纳米片在碳布骨架上的自支撑结构有助于提高其稳定性。SnO-MnO@CC 电极具有优异的可循环性，经过六次循环后仍能保持 94.12%的降解效率。这项工作可能为设计和探索高效稳定的电氧化催化剂用于染料降解提供了新途径。
