Hassle free synthesis of nanodimensional Ni, Cu and Zn sulfides for spectral sensing of Hg, Cd and Pb: A comparative study

Ansari, Zarina; Singha, Shib Shankar; Saha, Abhijit; Sen, Kamalika

doi:10.1016/j.saa.2017.01.005

Cited by 11 publications

(5 citation statements)

References 74 publications

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“…These peaks were related to lattice planes of (100), ( 103), ( 105), ( 106), (008), and (110) as the covellite CuS phase (JCPDS file: 06-0464). [43][44][45] The results were consistent with a selected area electron diffraction (SAED) pattern (103, 105, and 008) (Figure S3). The analysis of EDS confirmed that S and Cu had a coinciding distribution and the molar ratio of S/Cu obtained from quantitative analysis was ~2:3 (Figure 2E).…”

Section: Synthesis and Characterization Of Pccnssupporting

confidence: 83%

Tumor Microenvironment-Modulated Nanozymes for NIR-II-Triggered Hyperthermia-Enhanced Photo-Nanocatalytic Therapy via Disrupting ROS Homeostasis

Zhu¹,

Dai²,

Gao³

et al. 2021

IJN

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Purpose: Reactive oxygen species (ROS) are a group of signaling biomolecules that play important roles in the cell cycle. When intracellular ROS homeostasis is disrupted, it can induce cellular necrosis and apoptosis. It is desirable to effectively cascade-amplifying ROS generation and weaken antioxidant defense for disrupting ROS homeostasis in tumor microenvironment (TME), which has been recognized as a novel and ideal antitumor strategy. Multifunctional nanozymes are highly promising agents for ROS-mediated therapy. Methods: This study constructed a novel theranostic nanoagent based on PEG@Cu 2-x S@Ce6 nanozymes (PCCNs) through a facile one-step hydrothermal method. We systematically investigated the photodynamic therapy (PDT)/photothermal therapy (PTT) properties, catalytic therapy (CTT) and glutathione (GSH) depletion activities of PCCNs, antitumor efficacy induced by PCCNs in vitro and in vivo. Results: PCCNs generate singlet oxygen ( 1 O 2 ) with laser (660 nm) irradiation and use catalytic reactions to produce hydroxyl radical (•OH). Moreover, PCCNs show the high photothermal performance under NIR II 1064-nm laser irradiation, which can enhance CTT/ PDT efficiencies to increase ROS generation. The properties of O 2 evolution and GSH consumption of PCCNs achieve hypoxia-relieved PDT and destroy cellular antioxidant defense system respectively. The excellent antitumor efficacy in 4T1 tumor-bearing mice of PCCNs is achieved through disrupting ROS homeostasis-involved therapy under the guidance of photothermal/photoacoustic imaging. Conclusion:Our study provides a proof of concept of "all-in-one" nanozymes to eliminate tumors via disrupting ROS homeostasis.

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Section: Synthesis and Characterization Of Pccnssupporting

confidence: 83%

Tumor Microenvironment-Modulated Nanozymes for NIR-II-Triggered Hyperthermia-Enhanced Photo-Nanocatalytic Therapy via Disrupting ROS Homeostasis

Zhu¹,

Dai²,

Gao³

et al. 2021

IJN

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“…Due to the fact that these cannot degrade or be decomposed, heavy metals are accumulated in living organisms, impair the health of animals and humans with biological amplification through the food chain (Xu et al, 2003). As one of the "five poisonous" heavy metal elements, lead (Pb) is a non-essential element utilized during plant growth and metabolism, and otherwise has toxic effects (Sharma and Dubey, 2005;Bisht et al, 2013;Ansari et al, 2017;Shahid et al, 2016), inhibiting the progress of photosynthesis and reducing the activity of chlorophyllase.…”

Section: Introductionmentioning

confidence: 99%

Effects of Lead Stress on the Chlorophyll Content and Photosynthetic Fluorescence Characteristics of Vallisneria Natans

Gao¹,

Zeng²,

Ji³

et al. 2019

Appl. Ecol. Env. Res.

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In order to reveal the effects of lead stress on the chlorophyll content and fluorescence characteristics of Vallisneria natans, six Pb concentration levels were applied to a culture in clean river sand and water. The results showed that Pb could promote the synthesis of chlorophyll at a low concentration (Pb ≤ 10 mg•L -1 ) in one day. V. natans had certain tolerance to the stress of low Pb concentration. With the prolongation of stress time and increasing Pb concentration, the leaves of V. natans gradually lost their green color. Chlorophyll a decreased more than chlorophyll b. It had the least effect on carotenoids. Fv/Fm, Fv/Fo, qP, Y(II) and ETR decreased significantly (Pb > 10mg•L -1 ) in seven days. However, qN, Y(NO) and Y(NPQ) showed an upward trend. The efficiency of the leaves using light energy decreased noticeably, and the electron transport of PSII was blocked severely. It can be speculated that V. natans may be used in the phytoremediation of waters contaminated by a low concentration of lead.

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“…The peaks at 522 and 1060 cm −1 was due to an existence of sulfur atoms, and metal‐metal bonds in samples 56 . In the spectrum of pure Cu 9 S 5 (Figure 4E), the sharp peak at 471 cm −1 represents the frequency of S‐S stretching mode of S 2 ions, and the low frequency peak at 121 cm −1 was attributed to Cu‐S mode 57 . The co‐existence of combined NiS and Cu 9 S 5 peaks indicates the formation of the composite (Figure 4B‐D) and this result also supports the results of XRD.…”

Section: Resultsmentioning

confidence: 96%

One‐step synthesis of hierarchical structured nickel copper sulfide nanorods with improved electrochemical supercapacitor properties

et al. 2021

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Summary Nanorods‐like structured ternary metal sulfides of Ni1‐xCuxS with various compositions (x = 0.1, 0.2 and 0.3), and binary sulfides of NiS and Cu9S5 were synthesised via a single‐step hydrothermal process. The structural properties and the functional groups of the synthesized materials were characterized by X‐ray diffraction (XRD) and Fourier transform infrared (FTIR) studies. Surface structure and chemical composition of the samples were inspected using field emission scanning electron microscopy (FE‐SEM) and energy dispersive X‐ray spectroscopy (EDAX). The electrochemical properties of the as‐synthesised metal sulfide based electrodes were investigated by cyclic voltammetry (CV) and galvanostatic charge‐discharge (GCD) analyses and the maximum specific capacitance (SC) of ~1092 F/g was achieved for the Ni0.8Cu0.2S at a current density of 15 mA/g, while pure NiS and Cu9S5 electrodes showed the minimum SC of ~575 and ~70 F/g, respectively. Further, the electrochemical impedance studies (EIS) revealed low Rct value (3.4 Ω) for the Ni0.8Cu0.2S electrode and improved electrochemical supercapacitor properties of Ni0.8Cu0.2S electrode because of to the synergistic effect and its well crystalline nanorods structure which offers more electrochemical active sites for faradaic reactions and fast electrolyte ions diffusion in to electrode. Additionally, the stability performance of the Ni0.8Cu0.2S electrode was performed at a fixed current density of 20 mA/g, and the Ni0.8Cu0.2S sample possesses the good cycling stability with the retention of 80% capacitance after 3000 GCD cycles. These results demonstrate that the as‐synthesised binary and ternary metal sulfides are suitable cost effective and pollution free electrode materials for supercapacitors.

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Hassle free synthesis of nanodimensional Ni, Cu and Zn sulfides for spectral sensing of Hg, Cd and Pb: A comparative study

Cited by 11 publications

References 74 publications

Tumor Microenvironment-Modulated Nanozymes for NIR-II-Triggered Hyperthermia-Enhanced Photo-Nanocatalytic Therapy via Disrupting ROS Homeostasis

Tumor Microenvironment-Modulated Nanozymes for NIR-II-Triggered Hyperthermia-Enhanced Photo-Nanocatalytic Therapy via Disrupting ROS Homeostasis

Effects of Lead Stress on the Chlorophyll Content and Photosynthetic Fluorescence Characteristics of Vallisneria Natans

One‐step synthesis of hierarchical structured nickel copper sulfide nanorods with improved electrochemical supercapacitor properties

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