Hanifehpour Younes, Nozad Ashan Narges, Amani-Ghadim Ali Reza, Joo Sang Woo
Department of Chemistry, Sayyed Jamaleddin Asadabadi University, Asadabad P.O. Box 6541861841, Iran.
Office of Management Development and Research, East Azarbaijan's Water and Wastewater Company, Tabriz P.O. Box 83714-161, Iran.
Nanomaterials (Basel). 2021 Feb 2;11(2):378. doi: 10.3390/nano11020378.
In this study, Tb-doped CdSe nanoparticles with variable Tb content were synthesized by a simple sonochemical technique. The synthesized nanoparticles were characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and powder X-ray diffraction (XRD). The sono-photocatalytic activities of the as-prepared specimens were assessed for the degradation of Reactive Black 5. The experimental results show that the sono-photocatalytic process (85.25%) produced a higher degradation percentage than the individual sono- (22%) and photocatalytic degradation (8%) processes for an initial dye concentration and Tb-doped CdSe dosage of 20 mg/L and 1 g/L, respectively. Response surface methodology (RSM) was utilized to assess model and optimize the impacts of the operational parameters, namely, the Tb content, initial dye concentration, catalyst dosage, and time. The addition of benzoquinone results in remarkably inhibited degradation and the addition of ammonium oxalate reduced the removal percentage to 24%. Superoxide radicals and photogenerated holes were detected as the main oxidative species.
在本研究中，采用简单的声化学技术合成了具有可变铽含量的铽掺杂硒化镉纳米颗粒。通过X射线光电子能谱（XPS）、扫描电子显微镜（SEM）和粉末X射线衍射（XRD）对合成的纳米颗粒进行了表征。评估了所制备样品对活性黑5的降解的声光催化活性。实验结果表明，对于初始染料浓度和铽掺杂硒化镉用量分别为20 mg/L和1 g/L的情况，声光催化过程（85.25%）产生的降解率高于单独的声催化（22%）和光催化降解（8%）过程。采用响应面方法（RSM）评估模型并优化操作参数的影响，即铽含量、初始染料浓度、催化剂用量和时间。添加苯醌导致降解显著受到抑制，添加草酸铵使去除率降低至24%。检测到超氧自由基和光生空穴是主要的氧化物种。
