The work reports an investigation into the role played by the carbon residue from low-quality amorphous carbon nanotubes (aCNTs) and nitrogen doped aCNTs (aNCNTs) in the properties of solgel-synthesized TiO₂ and NTiO₂. The resutant modified nanohybrids are compared to nitrogen-doped TiO₂ where the N is sourced from an ethylenediamine as an organic C and N precursor. The presence of carbon originating from ethylenediamine was confirmed by TGA and DTA while additional C doping originating from aCNT and aNCNT residues was confirmed by EDS and XRD spectroscopic techniques. XRD spectroscopy further demonstrated that the carbonaceous material residues resulted in the formation of TiC in TiO₂–aCNT nanohybrids, and carbon nitride in NTiO₂–aCNT nanohybrids. The TiC promoted photocatalytic performance of TiO₂–aCNT nanohybrids while the carbon nitride residue increased charge recombination and thereby hampering the photocatalytic performance of NTiO₂. A strong correlation exists between the optical properties and the photocatalytic performance in that NTiO₂ has the lowest E_g (2.84 eV), second lowest charge recombination rate, and a high 2nd-order rate constant for the kinetics for CR dye removal. The TiO₂–aCNT nanohybrids have the best overall performance in terms of dye adsorption, color removal through chemisorption, and UVA 254 TOC removal due to its low charge recombination. Therefore, the introduction of the carbonaceous materials into TiO₂ significantly increases the adsorption capacity. Lastly, the presence of N in the carbonaceous materials further impedes the photocatalytic activity as observed by the low photocatalytic performance of NTiO₂–aNCNT and TiO₂–aNCNT nanohybrids.

工作报告调查通过碳残余物从低质量的无定形碳纳米管（发挥的作用一碳纳米管）和氮掺杂一碳纳米管（一个在的性质NCNTs）的溶胶-凝胶合成的TiO ₂和NTIO ₂。将还原剂改性的纳米杂化物与氮掺杂的TiO ₂进行比较，其中N源自乙二胺作为有机C和N前体。碳始发的从乙二胺的存在通过TGA和DTA确认而从额外的C掺杂始发 一个CNT和 一个通过EDS和XRD光谱技术证实了NCNT残留。XRD光谱进一步证明，碳质残留物导致TiO ₂（一种CNT纳米杂化物）中形成TiC ，而在NTiO _2中（一种CNT纳米杂化物中）形成氮化碳。所述的TiC促进氧化钛光催化性能₂ -一个CNT纳米复合物，而氮化碳残余物增加的电荷的重组，并由此阻碍NTIO的光催化性能₂。NTiO ₂的E _g最低，因此光学性能与光催化性能之间存在很强的相关性。（2.84 eV），第二低的电荷重组速率和高的二阶速率常数（用于去除CR染料的动力学）。将TiO ₂ -一个CNT纳米复合物在染料吸附，颜色去除通过化学吸附，和UVA 254 TOC除去而言，最佳的整体性能，因为它的低电荷重组。因此，将碳质材料引入TiO ₂ 显着提高了吸附能力。最后，将N的碳质材料的存在进一步阻碍由NTIO的低光催化性能观察到光催化活性₂ -一个NCNT和TiO ₂ -一个NCNT纳米复合物。