Facile template-free synthesis of PANI/TiO2 nanocomposite with enhanced photocatalytic activity for methyl orange degradation

IF 3.9 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: B Pub Date : 2025-06-26 DOI:10.1016/j.mseb.2025.118548

Somaye kafash , Hossain Milani Moghaddam , Seyedeh Faezeh Hashemi Karouei , Abbas Bagheri Khatibani

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引用次数: 0

Abstract

Polyaniline (PANI)/TiO₂ nanocomposites (PANITO) were successfully synthesized through a low-cost, facile, and template-free chemical oxidative polymerization method in order to improve the photocatalytic activity for fast degradation of methyl orange. Different percentages of hydrothermally prepared TiO₂ nanotubes were mixed with PANI. PANITO were characterized through a broad range of characterization techniques such as X-ray diffraction, field emission scanning electron microscopy, high-resolution transmission electron microscope, fourier transform infrared, UV–vis spectrometry, Photoluminescence, and photon correlation spectroscopy. PANITO exhibited enhanced photocatalytic activity towards decomposing methyl orange (MO) dye under a low-power ultraviolet light (8 W). Under these conditions, nearly complete dye removal (98.4 %) was achieved within 40 min using PANITO at a 12 % concentration of TiO₂ (PANITO (12 %)). This increasing rate in PANITO (12 %) compared to pure PANI and TiO₂ can be attributed to the p-n heterojunctions, good crystallinity, high surface area due to the one-dimensional morphology and low band gap (1.78 eV). This work could be a promising approach for environmental remediation by dye degradation.

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无模板制备具有增强甲基橙光催化活性的聚苯胺/TiO2纳米复合材料

为了提高聚苯胺(PANI)/TiO2纳米复合材料的光催化活性，采用低成本、简便、无模板的化学氧化聚合方法合成了聚苯胺(PANI)/TiO2纳米复合材料（PANITO）。将不同比例的水热法制备的TiO2纳米管与聚苯胺混合。通过x射线衍射、场发射扫描电子显微镜、高分辨率透射电子显微镜、傅里叶变换红外光谱、紫外-可见光谱、光致发光和光子相关光谱等广泛的表征技术对PANITO进行了表征。在低功率紫外光（8 W）下，PANITO对甲基橙（MO）染料的分解表现出增强的光催化活性。在这些条件下，使用TiO2浓度为12%的PANITO (PANITO(12%))，在40分钟内几乎完全去除染料（98.4%）。与纯PANI和TiO2相比，PANITO的增长率（12%）可归因于p-n异质结，良好的结晶度，一维形貌导致的高表面积和低带隙（1.78 eV）。该研究为染料降解环境修复提供了一种新的途径。

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来源期刊

Materials Science and Engineering: B 工程技术-材料科学：综合

CiteScore

5.60

自引率

2.80%

发文量

481

审稿时长

3.5 months

期刊介绍： The journal provides an international medium for the publication of theoretical and experimental studies and reviews related to the electronic, electrochemical, ionic, magnetic, optical, and biosensing properties of solid state materials in bulk, thin film and particulate forms. Papers dealing with synthesis, processing, characterization, structure, physical properties and computational aspects of nano-crystalline, crystalline, amorphous and glassy forms of ceramics, semiconductors, layered insertion compounds, low-dimensional compounds and systems, fast-ion conductors, polymers and dielectrics are viewed as suitable for publication. Articles focused on nano-structured aspects of these advanced solid-state materials will also be considered suitable.