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<p>Structural and photocatalytic properties of strontium oxide nanoparticles (SrO NPs), tin oxide nanoparticles (SnO<sub>2</sub> NPs)&#xa0;, and SrO-SnO<sub>2</sub> nanocomposites (SS NCs) synthesized by coprecipitation-sintering method were evaluated. The SS NCs were synthesized by varying the concentration of SnO<sub>2</sub> precursor from 0.2 to 1.0&#xa0;mol (SS-0.2, SS-0.4, SS-0.6, SS-0.8, and SS-1.0). The coprecipitated SrO-SnO<sub>2</sub> mixture was subjected to sintering at 800&#xa0;°C for 2&#xa0;h. The infrared spectra and XRD patterns confirmed the formation of SS NCs. The grain size of SS NCs was decreased in response to an increase in the proportion of SnO<sub>2</sub>. Where the band gap was increased. The gain size (nm)/band gap (eV) of SrO, SnO<sub>2</sub>, SS-0.2, and SS-1.0 were 50.3/2.09, 36.45/3.69, 66.22/3.24, and 37.34/3.66, respectively. SrO NPs with special, rod, cubic, and random morphology were obtained. SnO<sub>2</sub> NPs was largely random aggregates. The morphology of SS NCs had a diverse morphology, reflecting the morphology of their corresponding constituents. The BET analysis demonstrated the intermittent surface area compared with their bare constituents and mesoporous morphology. Photocatalytic efficiency was studied using malachite green (MG) dye and benzene. The MG was used as the primary target, where SS-0.4 exhibited the highest efficiency under natural sunlight. Cross-verification experiments performed using the NCs synthesized by varying the SrO proportion also confirmed the same. Reactive oxygen species analysis were performed using scavenger molecules, revealing the domination of superoxide (O<sub>2</sub>•), and hole (h+) mediated photooxidation. The maximum degradation efficiency noticed for MG and benzene was 95% and 99%, respectively. Optical and photocatalytic studies indicated the functioning of SS NCs as heterojunction photocatalysts.</p>

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Investigating the structural and photocatalytic characteristics of SrO–SnO₂ nanocomposites

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月22日

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  • Govindharaj Anandhakumari,
  • Palanisamy Jayabal,
  • Athinarayanan Balasankar,
  • Raja Venkatesan,
  • Gamal A. Shazly,
  • Tae Hwan Oh,
  • Mathivanan Durai,
  • Prathap Somu,
  • Subramaniyan Ramasundaram

摘要

Structural and photocatalytic properties of strontium oxide nanoparticles (SrO NPs), tin oxide nanoparticles (SnO2 NPs) , and SrO-SnO2 nanocomposites (SS NCs) synthesized by coprecipitation-sintering method were evaluated. The SS NCs were synthesized by varying the concentration of SnO2 precursor from 0.2 to 1.0 mol (SS-0.2, SS-0.4, SS-0.6, SS-0.8, and SS-1.0). The coprecipitated SrO-SnO2 mixture was subjected to sintering at 800 °C for 2 h. The infrared spectra and XRD patterns confirmed the formation of SS NCs. The grain size of SS NCs was decreased in response to an increase in the proportion of SnO2. Where the band gap was increased. The gain size (nm)/band gap (eV) of SrO, SnO2, SS-0.2, and SS-1.0 were 50.3/2.09, 36.45/3.69, 66.22/3.24, and 37.34/3.66, respectively. SrO NPs with special, rod, cubic, and random morphology were obtained. SnO2 NPs was largely random aggregates. The morphology of SS NCs had a diverse morphology, reflecting the morphology of their corresponding constituents. The BET analysis demonstrated the intermittent surface area compared with their bare constituents and mesoporous morphology. Photocatalytic efficiency was studied using malachite green (MG) dye and benzene. The MG was used as the primary target, where SS-0.4 exhibited the highest efficiency under natural sunlight. Cross-verification experiments performed using the NCs synthesized by varying the SrO proportion also confirmed the same. Reactive oxygen species analysis were performed using scavenger molecules, revealing the domination of superoxide (O2•), and hole (h+) mediated photooxidation. The maximum degradation efficiency noticed for MG and benzene was 95% and 99%, respectively. Optical and photocatalytic studies indicated the functioning of SS NCs as heterojunction photocatalysts.