Tran Chinh Van, Lai Duy Van, Nguyen Thu Minh, Quynh Thi Le Xuan, Nguyen Hanh Hong, Quan Nguyet Thi Minh, Nguyen Tung Thanh, La Duong Duc
Institute of Chemistry and Materials Hanoi Vietnam
Institute of Materials Science, Vietnam Academy of Science and Technology Hanoi Vietnam.
Nanoscale Adv. 2024 Dec 6;7(3):800-807. doi: 10.1039/d4na00707g. eCollection 2025 Jan 28.
This study investigates the effectiveness of polyaniline oxide (PANI) nanoparticles as photocatalysts for the degradation of organic dyes under visible light irradiation. Known for their stability and adjustable conductivity, PANI nanoparticles were synthesized a hydrothermal method using P123 surfactants, followed by calcination. The morphology, structural phase, and optical properties of the synthesized PANI materials were analyzed using scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), Raman spectroscopy, and Fourier transform infrared spectroscopy (FTIR). Results indicated that the synthesized PANI nanoparticles agglomerated into spherical particles with an average size of 70-80 nm. The photocatalytic properties of PANI materials were evaluated by the decolorization of rhodamine B (RhB) and methylene blue (MB) under simulated sunlight irradiation. The PANI photocatalyst was found to be highly effective in removing MB dye, achieving a removal efficiency of approximately 97.09% with a rate constant of 2.08 × 10 min. In comparison, the removal efficiency for RhB was about 58.01%. Additionally, the mechanism behind the photocatalytic degradation of MB dye by PANI was investigated and discussed. The study highlights the photostability and reproducibility of PANI nanoparticles through recycling experiments, contributing to the development of sustainable photocatalytic materials for efficient water treatment.
本研究考察了聚苯胺氧化物（PANI）纳米颗粒作为光催化剂在可见光照射下对有机染料的降解效果。PANI纳米颗粒以其稳定性和可调节的导电性而闻名，采用水热法并使用P123表面活性剂合成，随后进行煅烧。利用扫描电子显微镜（SEM）、X射线衍射（XRD）、能量色散X射线光谱（EDS）、拉曼光谱和傅里叶变换红外光谱（FTIR）对合成的PANI材料的形貌、结构相和光学性质进行了分析。结果表明，合成的PANI纳米颗粒团聚成平均尺寸为70 - 80 nm的球形颗粒。通过在模拟阳光照射下罗丹明B（RhB）和亚甲基蓝（MB）的脱色来评估PANI材料的光催化性能。发现PANI光催化剂在去除MB染料方面非常有效，去除效率约为97.09%，速率常数为2.08×10⁻² min⁻¹。相比之下，RhB的去除效率约为58.01%。此外，还对PANI光催化降解MB染料的机理进行了研究和讨论。该研究通过循环实验突出了PANI纳米颗粒的光稳定性和可重复性，有助于开发用于高效水处理的可持续光催化材料。
