Abstract Adding boron and phosphorus compounds substantially improved the thermal stability of carbon nanotubes (CNTs), increasing their oxidation temperature by 37–173 °C. Analysis of the B1s and P2p X-ray photoelectron spectral peaks suggested that the boron and phosphorus compounds chemically poisoned active sites of CNTs by forming C–O–B, C–O–P and C–P–O bonds. These interactions drove away oxygen from the active sites and delayed their oxidative reactions. Incorporation of these compounds in CNT pastes followed by high-temperature heat treatment in a vacuum considerably enhanced their field emission characteristics, evaluated by measuring current–voltage (I–V) curves and long-term stability, for an X-ray tube application.

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通过添加硼磷化合物提高碳纳米管的热稳定性及其场发射特性

摘要 添加硼和磷化合物显着提高了碳纳米管 (CNT) 的热稳定性，将其氧化温度提高了 37–173 °C。B1s 和 P2p X 射线光电子光谱峰的分析表明，硼和磷化合物通过形成 C-O-B、C-O-P 和 C-P-O 键化学毒化了 CNT 的活性位点。这些相互作用将氧气从活性位点带走并延迟了它们的氧化反应。在 CNT 糊料中加入这些化合物，然后在真空中进行高温热处理，大大增强了它们的场发射特性，通过测量电流 - 电压 (I-V) 曲线和长期稳定性进行评估，用于 X 射线管应用。