Photocatalytic degradation of phenol and polycyclic aromatic hydrocarbons in water by novel acid soluble collagen-polyvinylpyrrolidone polymer embedded in Nitrogen-TiO2

IF 2 3区化学 Q4 CHEMISTRY, PHYSICAL Chemical Physics Pub Date : 2024-10-23 DOI:10.1016/j.chemphys.2024.112485

Kingsley Tamunokuro Amakiri , Athanasios Angelis-Dimakis , Efthalia Chatzisymeon

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Abstract

The photocatalytic degradation of phenol, naphthalene, fluoranthene, phenanthrene, pyrene, benz[a]anthracene, and anthracene was investigated using a novel nitrogen-doped TiO₂/acid-soluble collagen-polyvinyl pyrrolidone nanocomposite (N-TiO₂/ASC-PVP). Characterization through X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) revealed that the nanocomposite consists of spheroidal particles smaller than those of undoped TiO₂. X-ray photoelectron spectroscopy (XPS) confirmed the incorporation of nitrogen within the TiO₂ lattice, appearing as both substitutional nitrogen (OTiN) and interstitial nitrogen (TiON). The degradation process followed apparent first-order kinetics, with the N-TiO₂/ASC-PVP calcined at 200°C and 400°C demonstrating high photocatalytic degradation efficiencies. The nanocomposite achieved a remarkable 98.6% degradation of the targeted compounds within 120 minutes at a concentration of 10 mg/L. The enhanced photocatalytic activity under visible light can be attributed to several factors: the smaller crystal size, increased surface hydroxyl groups, improved visible light absorption, and a reduced band gap energy. This N-TiO₂/ASC-PVP photocatalyst shows significant potential for applications in materials science and nanotechnology, supporting advancements in environmental and energy-related fields.

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氮-二氧化钛中嵌入的新型酸溶性胶原-聚乙烯吡咯烷酮聚合物光催化降解水中的苯酚和多环芳烃

利用新型氮掺杂 TiO2/酸溶性胶原-聚乙烯吡咯烷酮纳米复合材料（N-TiO2/ASC-PVP）研究了苯酚、萘、荧蒽、菲、芘、苯并[a]蒽和蒽的光催化降解。通过 X 射线衍射 (XRD)、扫描电子显微镜 (SEM) 和透射电子显微镜 (TEM) 分析表明，该纳米复合材料由比未掺杂 TiO2 更小的球形颗粒组成。X 射线光电子能谱（XPS）证实了二氧化钛晶格中含有氮元素，表现为置换氮（OTiN）和间隙氮（TiON）。降解过程遵循明显的一阶动力学，在 200°C 和 400°C 煅烧的 N-TiO2/ASC-PVP 具有很高的光催化降解效率。当目标化合物的浓度为 10 毫克/升时，纳米复合材料在 120 分钟内的降解率高达 98.6%。在可见光下光催化活性的增强可归因于几个因素：晶体尺寸变小、表面羟基增加、可见光吸收率提高以及带隙能降低。这种 N-TiO2/ASC-PVP 光催化剂在材料科学和纳米技术领域的应用潜力巨大，有助于推动环境和能源相关领域的发展。

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来源期刊

Chemical Physics 化学-物理：原子、分子和化学物理

CiteScore

4.60

自引率

4.30%

发文量

278

审稿时长

39 days

期刊介绍： Chemical Physics publishes experimental and theoretical papers on all aspects of chemical physics. In this journal, experiments are related to theory, and in turn theoretical papers are related to present or future experiments. Subjects covered include: spectroscopy and molecular structure, interacting systems, relaxation phenomena, biological systems, materials, fundamental problems in molecular reactivity, molecular quantum theory and statistical mechanics. Computational chemistry studies of routine character are not appropriate for this journal.