非常规生物电化学系统设计合成空心和球形硫化镉纳米颗粒

IF 3.1 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Nanomaterials and Nanotechnology Pub Date : 2021-01-01 DOI:10.1177/18479804211056162
C. Ho, T. Lam, Hanh Thi Nguyen, C. Nguyen, Quang Le Dang, Ji-hoon Lee, Youri Yang, H. Hur
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引用次数: 1

摘要

CdS纳米颗粒的合成是基于接种Shewanella sp.HN-41的生物电化学系统(BES)的非常规设计而开发的。BES配置包括两个由硅膜分隔但由穿过硅膜的石墨电极直接连接的瓶室,即非外电路生物电化学系统(nec_BES)。nec_BES阳极中的Shewanella sp.HN-41消耗乳酸并将电子转移到阳极中的石墨电极端,进而阴极中的石墨电极端直接将硫代硫酸盐还原为硫化物,21天后形成CdS纳米颗粒。在阴极溶液中合成了平均尺寸约为17nm的CdS纳米颗粒。通过透射电子显微镜(TEM)和扫描电子显微镜(SEM)图像观察了颗粒的中空、球形和空隙结构。能量色散X射线光谱(EDS)研究证实,纳米颗粒含有Cd和S元素,X射线衍射(XRD)数据显示,CdS纳米颗粒具有强晶相和混合晶粒。CdS纳米颗粒的UV-Vis吸收光谱揭示了相对于CdS本体材料的激子跃迁的蓝移,表明其在光学研究中的潜在应用。生物电化学系统可用于去除和制备其他硫化物重金属。
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Synthesis of hollow and spherical cadmium sulphide nanoparticles by an unconventional design of bioelectrochemical system
The synthesis of CdS nanoparticles was developed based on the unconventional design of bioelectrochemical system (BES) inoculated with Shewanella sp. HN-41. The BES configuration included two bottle chambers separated by silicon membrane but directly connected by a graphite electrode perforating through silicon membrane, namely, non-external circuit bioelectrochemical system (nec_BES). Shewanella sp. HN-41 in the anode of nec_BES consumed lactate and transferred electrons to the graphite electrode end in the anode and, in its turn, the graphite electrode end in the cathode reduced directly thiosulfate to sulphide, forming CdS nanoparticles after 21 days. CdS nanoparticles with the average size of approximately 17 nm were synthesized in the cathode solution. The hollow, spherical, and void structure of particles was observed by transmission electron microscopy (TEM) and scanning electron microscopy (SEM) images. The energy dispersive X-ray spectroscopy (EDS) study confirmed the nanoparticles contained Cd and S elements, and X-ray diffraction (XRD) data showed a strong crystalline phase and mixed crystallites of CdS nanoparticles. The UV-Vis absorption spectra of CdS nanoparticles revealed the blue shift in excitonic transition with respect to CdS bulk material, suggesting its potential application in optical studies. The bioelectrochemical system can be applied for the removal and preparation of other sulphide heavy metals.
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来源期刊
Nanomaterials and Nanotechnology
Nanomaterials and Nanotechnology NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
7.20
自引率
21.60%
发文量
13
审稿时长
15 weeks
期刊介绍: Nanomaterials and Nanotechnology is a JCR ranked, peer-reviewed open access journal addressed to a cross-disciplinary readership including scientists, researchers and professionals in both academia and industry with an interest in nanoscience and nanotechnology. The scope comprises (but is not limited to) the fundamental aspects and applications of nanoscience and nanotechnology
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