Scholarlink

<p>Although carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) nanomaterials, which function as peroxidase-like enzymes, have been widely used in various industries, their further application for the treatment of dye wastewater has been hampered by the lack of the insufficient active sites. In this work, CuO/salt-contained g-C<sub>3</sub>N<sub>4</sub> nanocomposites (CuO-CNS) were synthesized by treating molten salts (LiCl–KCl) followed by impregnation and post-calcination. This allowed potassium (K) atoms and CuO to be embedded in g-C<sub>3</sub>N<sub>4</sub> and coordinate with nitrogen atoms that were rich in electrons. The formation of K–N and Cu–N improved the electron transfer of CuO-CNS materials from 3′,3′,5′,5′-tetramethylbenzidine (TMB) to hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) or from rhodamine B (RhB) to H<sub>2</sub>O<sub>2</sub>, which in turn aided in the catalytic oxidation reaction of TMB or RhB breakdown. Besides, catalytic kinetic analysis of the obtained materials on TMB and RhB were investigated, respectively. In contrast to other nanomaterials based on g-C<sub>3</sub>N<sub>4</sub>, CuO-g-C<sub>3</sub>N<sub>4</sub> composite nanomaterials demonstrated a substantially better degrading efficiency of RhB with H<sub>2</sub>O<sub>2</sub>, reaching 90.5% in just 20&#xa0;min. It can be ascribed to the property of the nanostructures and the doping of K atoms and CuO in the nitrogen-carbon framework. Furthermore, it was shown that there was little variation in the degrading effectiveness of RhB by CuO-CNS nanomaterials in the electrolyte solution, which was comparable to that in the absence of additional electrolytes. According to the results, it may act as a catalyst to break down RhB in dye effluent.</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

CuO/salt-contained g-C3N4 nanocomposites for significantly promoting rhodamine B degradation

  • 期刊论文

  • 发表日期：

    2025年5月21日

查看全文
  • Xiaojuan Liu,
  • Qing Wang,
  • Yao Guan,
  • Weifeng Shen,
  • Jie Huang,
  • Le Zhao,
  • Fengjing Wu

摘要

Although carbon nitride (g-C3N4) nanomaterials, which function as peroxidase-like enzymes, have been widely used in various industries, their further application for the treatment of dye wastewater has been hampered by the lack of the insufficient active sites. In this work, CuO/salt-contained g-C3N4 nanocomposites (CuO-CNS) were synthesized by treating molten salts (LiCl–KCl) followed by impregnation and post-calcination. This allowed potassium (K) atoms and CuO to be embedded in g-C3N4 and coordinate with nitrogen atoms that were rich in electrons. The formation of K–N and Cu–N improved the electron transfer of CuO-CNS materials from 3′,3′,5′,5′-tetramethylbenzidine (TMB) to hydrogen peroxide (H2O2) or from rhodamine B (RhB) to H2O2, which in turn aided in the catalytic oxidation reaction of TMB or RhB breakdown. Besides, catalytic kinetic analysis of the obtained materials on TMB and RhB were investigated, respectively. In contrast to other nanomaterials based on g-C3N4, CuO-g-C3N4 composite nanomaterials demonstrated a substantially better degrading efficiency of RhB with H2O2, reaching 90.5% in just 20 min. It can be ascribed to the property of the nanostructures and the doping of K atoms and CuO in the nitrogen-carbon framework. Furthermore, it was shown that there was little variation in the degrading effectiveness of RhB by CuO-CNS nanomaterials in the electrolyte solution, which was comparable to that in the absence of additional electrolytes. According to the results, it may act as a catalyst to break down RhB in dye effluent.