In this study, bimetallic nanoparticles (NPs) of Co–Pt anchored on cellulose nanofibers (CNFs) for catalytic applications were synthesized via a sonochemical approach. The electro-spinning technique was employed for the synthesis of CNFs from cellulose acetate. The thorough characterization of synthesised Co–Pt/CNF nanocomposites was performed with the help of scanning electron microscopy (SEM), Fourier transform infra-red (FT-IR) spectroscopy, field emission scanning electron microscopy (FESEM) with energy dispersive X-ray analysis (EDX), and X-ray diffraction (XRD). This method leads to the facile preparation of Co–Pt bimetallic NPs using cellulose as a support. The synthesized nanocomposites were used for the p-nitrophenol (p-NP) reduction to p-aminophenol (p-AP) with excess sodium borohydride (NaBH₄) to assess their catalytic performance. The effects of various parameters on the performance of the catalyst were also investigated. The investigated parameters are catalyst loading, initial p-NP concentration and NaBH₄ concentration. The extent of p-NP reduction into p-AP over Co–Pt/CNF nanocomposites with an excess of NaBH₄ was examined with UV-vis spectroscopy. The p-NP reduction to p-AP over Co–Pt NPs anchored on CNFs was achieved within 98 seconds with around 100% conversion. The efficiency of the catalyst did not vary significantly up to 5 consecutive cycles. The excellent catalytic activity (K_app = 0.028 s⁻¹) and stability of the as-synthesized Co–Pt nanoparticles supported on CNFs make them potential catalysts for nitrophenol reduction and wastewater treatment.

中文翻译：

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用于催化还原对硝基苯酚的双金属 Co-Pt/纤维素纳米复合材料的合成

在这项研究中，通过声化学方法合成了锚定在纤维素纳米纤维 (CNFs) 上用于催化应用的 Co-Pt 双金属纳米粒子 (NPs) 。静电纺丝技术用于从醋酸纤维素合成 CNF。在扫描电子显微镜 (SEM)、傅里叶变换红外 (FT-IR) 光谱、场发射扫描电子显微镜 (FESEM) 和能量色散 X 射线的帮助下，对合成的 Co-Pt/CNF 纳米复合材料进行了全面表征分析 (EDX) 和 X 射线衍射 (XRD)。该方法导致使用纤维素作为载体轻松制备 Co-Pt 双金属 NP。合成的纳米复合材料用于对硝基苯酚 ( p- NP) 还原为对氨基苯酚 ( p- AP) 与过量的硼氢化钠 (NaBH ₄ ) 以评估其催化性能。还研究了各种参数对催化剂性能的影响。研究的参数是催化剂负载、初始p- NP浓度和NaBH ₄浓度。用紫外-可见光谱检查了在具有过量 NaBH _{4 的}Co-Pt/CNF 纳米复合材料上p -NP 还原为p -AP的程度。所述p -NP减少到p锚定在 CNF 上的 Co-Pt NP 上的 -AP 在 98 秒内实现，转化率约为 100%。催化剂的效率在连续 5 次循环后没有显着变化。负载在 CNF 上的合成 Co-Pt 纳米粒子优异的催化活性 ( K _app = 0.028 s ^-1 ) 和稳定性使其成为硝基苯酚还原和废水处理的潜在催化剂。