In this work, fibrous silica-titania (FST) was successfully prepared by the microemulsion method prior to the addition of three types of carbonaceous materials: graphitic-carbon nitride, g-C3N4 (CN), graphene nanoplatelets (GN), and multi-wall carbon nanotubes, MWCNT (CNT), via a solid-state microwave irradiation technique. The catalysts were characterized using XRD, FESEM, TEM, FTIR, UV-Vis DRS, N2 adsorption-desorption, XPS and ESR, while their photoactivity was examined on the degradation of toxic 2-chlorophenol (2-CP). The result demonstrated that the initial reaction rate was in the following order: CNFST (5.1 × 10^–3 mM min^-1) > GNFST (2.5 × 10^–3 mM min^-1) > CNTFST (2.3 × 10^–3 mM min^-1). The best performance was due to the polymeric structure of g-C3N4 with a good dispersion of C and N on the surface FST. This dispersion contributed towards an appropriate quantity of defect sites, as a consequence of the greater interaction between g-C3N4 and the FST support, that led to narrowed of band gap energy (2.98 eV to 2.10 eV). The effect of scavenger and ESR studies confirmed that the photodegradation over CNFST occurred via a Z-scheme mechanism. It is noteworthy that the addition of green carbonaceous materials on the FST markedly enhanced the photodegradation of toxic 2-CP.

在这项工作中，先通过微乳液法成功制备了纤维状的二氧化硅-二氧化钛（FST），然后添加了三种类型的碳质材料：石墨碳氮化物，g-C3N4（CN），石墨烯纳米片（GN）和多壁碳纳米管，MWCNT（CNT），通过固态微波辐射技术。用XRD，FESEM，TEM，FTIR，UV-Vis DRS，N2吸附-脱附，XPS和ESR对催化剂进行了表征，同时考察了它们对有毒2-氯苯酚（2-CP）降解的光活性。结果表明，初始反应速率为按以下顺序：CNFST（5.1×10 ^-3毫摩尔分钟^-1）> GNFST（2.5×10 ^-3毫摩尔分钟^-1）> CNTFST（2.3×10 ^-3 mm最小^{- 1个}）。最佳性能归因于g-C3N4的聚合物结构，C和N在FST表面上具有良好的分散性。由于g-C3N4与FST支持物之间的相互作用更大，结果导致了适当数量的缺陷位点扩散，从而导致带隙能量（2.98 eV至2.10 eV）变窄。清除剂和ESR研究的效果证实，通过Z方案机制发生了CNFST上的光降解。值得注意的是，在FST中添加绿色碳质材料显着增强了有毒2-CP的光降解。