【摘要】 稀土元素由于特殊的电子结构而表现出特异的物理和化学性质，在传感器等领域有着广泛的应用。本文研究了氧化镍掺杂对稀土氧化铈基材料的物相、化学态和形貌等理化性质的影响。对比了基于掺杂前后氧化铈基敏感材料的传感器对不同有机物和氢气的响应情况。研究发现，NiO的掺杂诱使CeO₂材料产生氧空位，且提高了Ce³⁺的浓度。掺杂1.0%NiO的CeO₂对有机物的敏感性显著提高，其中对丙酮的响应明显高于其他有机物。相较于未掺杂的CeO₂基传感器，其对丙酮的响应强度提升了约4倍，且对痕量的氢气也表现出良好的响应特性。研究结果表明，镍的掺杂能有效提升CeO₂中氧空位的含量，因而有效改善材料对部分气体的响应特性。更多还原

【Abstract】 Rare earth elements exhibit unique physical and chemical properties due to their special electronic structure and are widely employed in applications such as sensors. This paper investigated the impact of nickel doping on the phase,chemical state,and morphological properties of ceria. A comparison of the sensor responses based on cerium oxide-based sensitive materials before and after doping to various organic compounds and hydrogen. This study found that Ni O doping promotes the formation of oxygen vacancies in CeO₂ and enhances the concentration of cerium ions in lower valence states. The sensitivity of CeO₂ doped with 1. 0% Ni O to organic compounds is significantly enhanced,and its response to acetone is markedly higher than that to other organic compounds. Compared with undoped CeO₂-based sensors,the response intensity to acetone is approximately four times higher,and the sensor also exhibits excellent response characteristics toward trace amounts of hydrogen. Research results indicate that nickel doping can effectively increase the concentration of oxygen vacancies in CeO₂,thereby enhancing the material’s response characteristics to specific gases.更多还原