硫化镉纳米颗粒:合成与表征

2019 International Conference on Computer, Communication, Chemical, Materials and Electronic Engineering (IC4ME2) Pub Date : 2019-07-01 DOI:10.1109/IC4ME247184.2019.9036654

B. R. Bhattarai, Amrit Regmi, S. K. Gautam

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引用次数: 2

摘要

以氯化镉和硫化钠分别为镉源和硫源，采用湿化学共沉淀法合成了硫化镉纳米颗粒。用抗坏血酸作封盖剂。XRD分析表明，颗粒呈六方相。使用Debye-Scherer方程，发现平均粒径与温度有关，在$20^{\circ}\ maththrm {C}$时为3.1 nm，在45°C时为3.4 nm。合成的CdS纳米粒子在吸收边表现出明显的蓝移。它们表现出量子尺寸效应，带隙随着粒子尺寸的减小而增大。XRD、TEM和uv -可见光谱的平均粒径在3 ~ 5 nm范围内基本一致。

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Cadmium Sulfide Nanoparticles: Synthesis and Characterization

Cadmium sulfide (CdS) nanoparticles were synthesized by wet chemical coprecipitation method using cadmium chloride and sodium sulfide as cadmium and sulfur sources, respectively. Ascorbic acid was used as capping agent. XRD analysis showed that the particles were present in hexagonal phase. The average particle size, using Debye-Scherer's equation, was found to be temperature dependent, 3.1 nm at $20^{\circ}\mathrm{C}$ and 3.4 nm at 45°C. The synthesized CdS nanoparticles revealed considerable blue shift in absorption edge compare to to the bulk CdS. They exhibited quantum size effect and showed an increase in band gap with the decrease in particle size. The average particles sizes obtained from XRD, TEM and UV-visible spectroscopy were found to be in good agreement with each other in the range 3-5 nm.

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来源期刊

2019 International Conference on Computer, Communication, Chemical, Materials and Electronic Engineering (IC4ME2)

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