Abstract

Pristine ZrO₂ and molar ratios of Cu-doped ZrO₂ nanoparticles were synthesized by chemical precipitation. The XRD pattern of pristine ZrO₂ and Cu-doped ZrO₂ nanoparticles shows the formation of t-tetragonal phase and shifting of tetragonal phase to monoclinic phase. The average crystallite sizes of the pristine ZrO₂ and Cu-doped ZrO₂ nanoparticles were calculated as 2.9, 4.65, 4.76, 5.02, and 4.96 nm, respectively. The Cu (0.06 M)-doped ZrO₂ nanoparticles are present as spherical morphology and high agglomeration was confirmed by FE-SEM and TEM analyses. The XPS spectra affirmed the presence of Cu²⁺, Zr⁴⁺, and oxygen ions in the Cu (0.06 M)-doped ZrO₂ nanoparticles. The Cu-doped ZrO₂ nanoparticles exhibit two energy gaps at 5.30 and 3.05 eV, 5.21 and 2.22 eV, 4.65 and 2.11 eV, and 4.44 and 2.65 eV. The surface defects and oxygen vacancies were analyzed by PL and ESR spectroscopy. The ESR spectra are clearly asymmetric in shape and contain a peak signal related to the presence of the copper species (Cu²⁺) in the distorted tetragonal coordination of ZrO₂. The photocatalytic activities of Cu (0.06 M)-doped ZrO₂ nanoparticles were successfully sought on degradation of the two azo dyes: methyl violet and methyl blue under sunlight irradiation. Cu (0.06 M)-doped ZrO₂ showed complete degradation at 70 min. The reusability of Cu (0.06 M)-doped ZrO₂ nanoparticles shows maximum degradation efficiency for six successive runs.

中文翻译：

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铜掺杂ZrO 2纳米粒子的多功能制备和表征：增强的光催化和光致发光性能

摘要

通过化学沉淀法合成了原始的ZrO ₂和Cu掺杂的ZrO ₂纳米颗粒的摩尔比。原始的ZrO ₂和掺杂Cu的ZrO ₂纳米粒子的XRD图谱显示了t-四方相的形成以及四方相向单斜相的移动。原始ZrO ₂和Cu掺杂的ZrO ₂纳米颗粒的平均微晶尺寸分别计算为2.9、4.65、4.76、5.02和4.96 nm。掺杂有Cu（0.06 M）的ZrO ₂纳米颗粒呈球形，并通过FE-SEM和TEM分析证实了高团聚。XPS光谱证实了Cu 2 ⁺，Zr ⁴⁺的存在和掺杂有Cu（0.06 M）的ZrO ₂纳米颗粒中的氧离子。掺杂Cu的ZrO ₂纳米颗粒在5.30和3.05eV，5.21和2.22eV，4.65和2.11eV以及4.44和2.65eV处表现出两个能隙。通过PL和ESR光谱分析表面缺陷和氧空位。ESR谱的形状明显不对称，并且包含一个与ZrO ₂的扭曲四方配位中的铜物质（Cu ²⁺）有关的峰值信号。成功地寻求了Cu（0.06 M）掺杂的ZrO ₂纳米粒子对在阳光照射下降解两种偶氮染料：甲基紫和甲基蓝的光催化活性。掺杂Cu（0.06 M）的ZrO ₂在70分钟时显示出完全降解。铜（0.06 M）掺杂的ZrO ₂纳米颗粒的可重复使用性显示了六个连续运行的最大降解效率。