Polyaniline (PANI)-wrapped TiO2 nanorods (PANI/TiO2), obtained through the oxidative polymerization of aniline at the surface of hydrothermally presynthesized TiO2 nanorods, were evaluated as photocatalysts for the degradation of Bisphenol A (BPA). Fourier-transform infrared spectroscopy analysis revealed the successful incorporation of PANI into TiO2 by the appearance of peaks at 1577 and 1502 cm-1 that are due to the C=C and C-N stretch of the benzenoid or quinoid ring in PANI. Brunauer-Emmett-Teller analysis revealed that PANI/TiO2 had almost double the surface area of TiO2 (44.8999 m2/g vs 28.2179 m2/g). Transmission electron microscopy (TEM) analysis showed that TiO2 nanorods with different diameters were synthesized. The TEM analysis showed that a thin layer of PANI wrapped the TiO2 nanorods. X-ray photon spectroscopy survey scan of the PANI/TiO2 nanocomposite revealed the presence of C, O, Ti, and N. Photocatalytic activity evaluation under UV radiation through the effect of key parameters, including pH, contact time, dosage, and initial concentration of BPA, was carried out in batch studies. Within 80 min, 99.7% of 5 ppm BPA was attained using the 0.2 g/L PANI/TiO2 photocatalyst at pH 10. The quantum yield (QY) of these photocatalysts was evaluated to be 9.86 × 10-5 molecules/photon and 2.82 × 10-5 molecules/photon for PANI/TiO2 and TiO2, respectively. PANI/TiO2 showed better performance than as-synthesized TiO2 with a rate constant of 4.46 × 10-2 min-1 compared to 2.18 × 10-2 min-1. The rate of degradation of PANI/TiO2 was also superior to that of TiO2 (150 mmol/g/h vs 74.89 mmol/g/h). Nitrate ions increased the rate of degradation of BPA, while humic acid consistently inhibited the degradation of BPA. LC-MS analysis identified degradation products with m/z 213.1, 135.1, and 93.1. The PANI/TiO2 nanocomposite was reused up to five cycles with a removal of at least 80% in the fifth cycle. LC-MS results revealed three possible BPA degradation intermediates. LC-MS analysis identified degradation products which included protonated BPA, [C14H13O2+], and [C9H11O+]. The PANI/TiO2 nanocomposite demonstrated superior photocatalytic activity with respect to improved QY and figure of merit and lower energy consumption.

Shepherd Sundayi Sambaza

Arjun Maity

Kriveshini Pillay

ACS Omega

ACS OMEGA 是一个开放获取的全球性科学文章出版物，描述了化学和科学接口领域的新发现，没有对直接影响进行任何感知评估。

ACS Omega is a global open-access scientific journal that focuses on new discoveries in the field of chemistry and its interfaces, without assessing the direct impact of the research.

ACS Omega 是一本开放获取的全球性科学期刊，专注于化学及其相关科学领域的新发现，且不对研究的直接影响进行评估。

Polyaniline-Coated TiO<sub>2</sub>Nanorods for Photocatalytic Degradation of Bisphenol A in Water

PANI/TiO2 nanocomposite demonstrated superior photocatalytic activity with respect to improved QY and figure of merit and lower energy consumption and the rate of degradation of PANI was also superior to that of TiO2.

Category	Quartile
化学	3
化学, 化学综合	3

Polyaniline-Coated TiO₂Nanorods for Photocatalytic Degradation of Bisphenol A in Water

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Category	Quartile
CHEMISTRY, MULTIDISCIPLINARY	2

Polyaniline-Coated TiO2Nanorods for Photocatalytic Degradation of Bisphenol A in Water

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Polyaniline-Coated TiO₂Nanorods for Photocatalytic Degradation of Bisphenol A in Water