Scholarlink

<p>Calcium (Ca)-doped vanadium pentoxide (Ca-V<sub>2</sub>O<sub>5</sub>) nanostructures were prepared by using egg-shell waste as a Ca-source. X-ray diffraction (XRD) analysis of pure V<sub>2</sub>O<sub>5</sub> and Ca-V<sub>2</sub>O<sub>5</sub> samples reveals the formation of orthorhombic V<sub>2</sub>O<sub>5</sub> nanocrystals. Characteristic V-O vibrations were noticed in the Fourier transform infrared (FTIR) spectroscopic study. Morphological investigations confirm the occurrence of heterogenous morphologies (plates and sticks). Light absorption and emission features of the Ca-V<sub>2</sub>O<sub>5</sub> samples were assessed by UV-visible absorption and photoluminescence (PL) studies. In order to examine the catalytic activity of Ca-V<sub>2</sub>O<sub>5</sub> samples, hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>)-mediated oxidative degradation of methylene blue and Congo red was selected as model catalytic reactions. 5Ca-V<sub>2</sub>O<sub>5</sub> powder achieved 96.8% methylene blue degradation efficiency within 10&#xa0;min, whereas 2Ca-V<sub>2</sub>O<sub>5</sub> powder attained 78.8% Congo red degradation efficiency within 15&#xa0;min. The reasons for catalytic performance of Ca-V<sub>2</sub>O<sub>5</sub> samples were explored. The pigment characteristics of Ca-V<sub>2</sub>O<sub>5</sub> samples were also determined and 5Ca-V<sub>2</sub>O<sub>5</sub> powder possess a* = 17.68 and b* = 25.46. Ca-dopant determines the colour hue of V<sub>2</sub>O<sub>5</sub> powder. The Ca-V<sub>2</sub>O<sub>5</sub> powder could become an effective catalyst and pigment.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Structural, Optical, Catalytic, and Pigment Properties of Ca-Doped V2O5 Nanostructures

  • 期刊论文

  • 发表日期：

    2025年4月28日

查看全文
  • S. Mythili,
  • N. Jayaprakash,
  • Madhappan Santhamoorthy,
  • Seong-Cheol Kim,
  • V. Sathesh,
  • J. Gajendiran,
  • Saravanan Rajendran,
  • R. Suresh

摘要

Calcium (Ca)-doped vanadium pentoxide (Ca-V2O5) nanostructures were prepared by using egg-shell waste as a Ca-source. X-ray diffraction (XRD) analysis of pure V2O5 and Ca-V2O5 samples reveals the formation of orthorhombic V2O5 nanocrystals. Characteristic V-O vibrations were noticed in the Fourier transform infrared (FTIR) spectroscopic study. Morphological investigations confirm the occurrence of heterogenous morphologies (plates and sticks). Light absorption and emission features of the Ca-V2O5 samples were assessed by UV-visible absorption and photoluminescence (PL) studies. In order to examine the catalytic activity of Ca-V2O5 samples, hydrogen peroxide (H2O2)-mediated oxidative degradation of methylene blue and Congo red was selected as model catalytic reactions. 5Ca-V2O5 powder achieved 96.8% methylene blue degradation efficiency within 10 min, whereas 2Ca-V2O5 powder attained 78.8% Congo red degradation efficiency within 15 min. The reasons for catalytic performance of Ca-V2O5 samples were explored. The pigment characteristics of Ca-V2O5 samples were also determined and 5Ca-V2O5 powder possess a* = 17.68 and b* = 25.46. Ca-dopant determines the colour hue of V2O5 powder. The Ca-V2O5 powder could become an effective catalyst and pigment.