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<p>In this novel research, an effective S-scheme Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>/TiO<sub>2</sub> heterostructure was constructed by coupling TiO<sub>2</sub> with various proportions of Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> for mitigating rhodamine B dye under commercial visible LED lamp. Mesoporous Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>/TiO<sub>2</sub> heterojunction with 10 wt% Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> nanoparticles were generated via sonochemical method. Through the employment of DRS, XPS, SEM, PL, HRTEM, XRD, SEM, EDX and N<sub>2</sub>-adsorption-desorption isotherm, the complete characterization of the specimens was evaluated. Photoluminescence analysis recorded that the transportation rate of electron-hole pairs of TiO<sub>2</sub> has been strongly promoted after being hybridized with Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> nanoparticles. The experimental results revealed that Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> recorded a crucial role in both photocatalytic activity and light harvesting of titania by depressing the optical band gap energy and elevated the surface parameters to more positive direction. The heterojunction with 10 wt% Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> improved and optimized the photocatalytic activity which destroyed 85.5% of RhB dye during 240 min of exposure to visible radiation with kinetic rate of 0.0082 min<sup>−1</sup>.The pronounced improvement in the photocatalytic efficiency of Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub>/TiO<sub>2</sub> heterojunctions was attributed to the proper production of an auspicious S-scheme heterostructure with strong redox capability, employing reactive species OH<sup>.</sup> and O<sub>2</sub><sup>.-</sup> radicals in the photocatalytic reaction. PL spectrum of hydroxyterephthalic acid and reactive oxygen trapping experiments implied that S-scheme pathway was the appropriate model for elucidating the mechanism of the charge transfer mechanism between TiO<sub>2</sub> and Bi<sub>2</sub>O<sub>2</sub>CO<sub>3</sub> semiconductors.</p><p></p>

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Fine tuning of Bi2O2CO3/TiO2 hybrid nanostructure for LED light-assisted cationic dye neutralization

  • 期刊论文

  • 发表日期：

    2025年9月18日

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  • Maymounah A. Alrayyani,
  • Mohamed A. Eltawil,
  • Nagy N. Mohammed,
  • Khaled M. A. Elmoneim,
  • M. Fayez,
  • Ali Kh. Khalil,
  • M. A. Ahmed

摘要

In this novel research, an effective S-scheme Bi2O2CO3/TiO2 heterostructure was constructed by coupling TiO2 with various proportions of Bi2O2CO3 for mitigating rhodamine B dye under commercial visible LED lamp. Mesoporous Bi2O2CO3/TiO2 heterojunction with 10 wt% Bi2O2CO3 nanoparticles were generated via sonochemical method. Through the employment of DRS, XPS, SEM, PL, HRTEM, XRD, SEM, EDX and N2-adsorption-desorption isotherm, the complete characterization of the specimens was evaluated. Photoluminescence analysis recorded that the transportation rate of electron-hole pairs of TiO2 has been strongly promoted after being hybridized with Bi2O2CO3 nanoparticles. The experimental results revealed that Bi2O2CO3 recorded a crucial role in both photocatalytic activity and light harvesting of titania by depressing the optical band gap energy and elevated the surface parameters to more positive direction. The heterojunction with 10 wt% Bi2O2CO3 improved and optimized the photocatalytic activity which destroyed 85.5% of RhB dye during 240 min of exposure to visible radiation with kinetic rate of 0.0082 min−1.The pronounced improvement in the photocatalytic efficiency of Bi2O2CO3/TiO2 heterojunctions was attributed to the proper production of an auspicious S-scheme heterostructure with strong redox capability, employing reactive species OH. and O2.- radicals in the photocatalytic reaction. PL spectrum of hydroxyterephthalic acid and reactive oxygen trapping experiments implied that S-scheme pathway was the appropriate model for elucidating the mechanism of the charge transfer mechanism between TiO2 and Bi2O2CO3 semiconductors.