We report the synthesis of titania nanofibers (TNF) of ∼195 nm mean diameter doped with phosphorus through one‐pot electrospinning followed by decoration of Ag nanoparticles (NPs). The Ag NPs of ∼8 nm size on 2 % P‐doped TNFs (Ag‐PTNFs) showed excellent photocatalytic activity for the reduction of Cr(VI), under simulated solar light, with ∼100 % conversion to Cr(III) in 90 min at pH 3 with a pseudo‐first order rate constant of 0.085 min⁻¹ that is 96.5 % higher than TNFs. The Ag‐PTNFs also exhibited excellent photodegradation of methylene blue with pseudo‐first order rate constant of 0.052 min⁻¹ which is 82.7 % better than TNFs. The enhanced photocatalytic performance of Ag‐PTNFs is attributed to the reduced band‐gap, increased charge separation and reduced recombination rates. A proposed photocatalytic mechanism based on the synergistic effect of both Ag and P doping is presented which highlights the potential of these composite materials for water remediation.

中文翻译：

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Ag纳米粒子修饰的P掺杂TiO2纳米纤维在模拟太阳光下具有增强的光催化活性

我们报道了通过一锅静电纺丝然后修饰银纳米颗粒（NPs）合成的平均直径约为195 nm的掺有磷的二氧化钛纳米纤维（TNF）。在2％的P掺杂的TNF（Ag-PTNF）上，约8 nm大小的Ag NP在模拟太阳光下表现出优异的光催化活性，可以还原Cr（VI），90％时有100％转化为Cr（III）在pH 3下的min-1假一级速率常数为0.085 min ^-1，比TNF高96.5％。Ag-PTNF还表现出优异的亚甲基蓝光降解性能，其假一级速率常数为0.052 min ^-1比TNF改善了82.7％。Ag-PTNF的光催化性能增强归因于带隙的减少，电荷分离的增加和重组率的降低。提出了一种基于银和磷掺杂协同效应的光催化机理，突出了这些复合材料在水修复方面的潜力。