Dielectric and Conductivity Relaxation of rGO@CdS Nanocomposites via In Situ Assembly of CdS Nanoparticles on an rGO Layer

Ma, Ligang; Ai, Xiaoqian; Yang, Xingming; Song, Xiang; Wu, Xiaoshan

doi:10.1021/acs.jpcc.0c07975

Cited by 10 publications

(4 citation statements)

References 40 publications

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“…This interface creates space charge within the system, which prompted further increase of dielectric constant value. In addition to that, the defect site of the nanoparticles and the organic–inorganic interface create the space charge within the system 10 , 46 , 47 . The space charge polarization is predominant towards the lower frequency range.…”

Section: Resultsmentioning

confidence: 99%

“…Among the various semiconductor nanomaterials, metal sulphides have received much attention due to their appropriate electronic band gap and bandposition 2 . So far as application point of view, metal sulfides based devices displayed efficient performances in several areas including fuel cell 3 , solar cell 4 , light-emitting diode 5 , gas sensor 6 , battery 7 , supercapacitor 8 , thermoelectric 9 , dielectric 10 and memory 11 applications.The performance of the devices predominantly depends on the nano architecture of the metal sulfides.…”

Section: Introductionmentioning

confidence: 99%

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Organic molecule functionalized lead sulfide hybrid system for energy storage and field dependent polarization performances

Ghosh

Waziri

et al. 2022

Sci Rep

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A wet chemical route is reported for synthesising organic molecule stabilized lead sulfide nanoparticles. The dielectric capacitance, energy storage performances and field-driven polarization of the organic–inorganic hybrid system are investigated in the form of a device under varying temperature and frequency conditions. The structural analysis confirmed the formation of the monoclinic phase of lead sulfide within the organic network. The band structure of lead sulfide was obtained by density functional theory calculation that supported the semiconductor nature of the material with a direct band gap of 2.27 eV. The dielectric performance of the lead sulfide originated due to the dipolar and the space charge polarization. The energy storage ability of the material was investigated under DC-bias conditions, and the device exhibited the power density values 30 W/g and 340 W/g at 100 Hz and 10 kHz, respectively. The electric field-induced polarization study exhibited a fatigue-free behaviour of the device for 103 cycles with a stable dielectric strength. The study revealed that the lead sulfide-based system has potential in energy storage applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Organic molecule functionalized lead sulfide hybrid system for energy storage and field dependent polarization performances

Ghosh

Waziri

et al. 2022

Sci Rep

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“…The intensity of the diffraction peak 002 (CdS NPs) has been increased due to overlapping of the RGO peak in same position at about 2h value 26°, and it is also noticeable that in case of CG_1 sample there is a hump at about 2h = 10°which is for the presence of GO content which is fully not converted into graphene in RGO-CdS nanocomposite. The average crystallite size of CdS nanoparticles grown on the RGO surface can be estimated according to the Debye-Scherrer equation [49]:…”

Section: Materials Characterizationmentioning

confidence: 99%

Exploration of photoreduction ability of reduced graphene oxide–cadmium sulphide hetero-nanostructures and their intensified activities against harmful microbes

et al. 2021

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Fabrication of effective photocatalyst using semiconductors and graphene or reduced graphene oxide has been regarded as one of the most promising task to attenuate the environmental pollution. This paper reports the synthesis of different nanocomposites of reduced graphene oxide-cadmium sulfide (RGO-CdS) with varying weight ratio of RGO by simple reflux condensation reaction, during which the reduction of graphene oxide (GO) and formation of CdS nanoparticles occur simultaneously. The combination of CdS nanoparticles (NPs) with the optimum amount of RGO gives a noticeable effect on the properties of the synthesized hybrid nanocomposites, such as enhanced optical, photocatalytic properties. The microscopic studies proved that with the increasing RGO content in the nanocomposites, the particle size decreases and got different shapes. These nanocomposites have been investigated separately as nanocatalyst for the reduction of Cr(VI) to Cr(III) in the presence of visible light irradiation and the catalytic activity depends on the pH of the medium and also the particle size of the CdS NPs which are supported by the band gap energy derived from Tauc's equation. The significant increase in photocatalytic performance of the RGO-CdS nanocomposite was attributed to high electron conductivity of the CdS NPs and RGO surface which facilitates charge separation and prolongs the lifetime of photogenerated electron-hole pairs by decreasing the recombination rate. Antibacterial and antiprotozoal activities have been investigated to determine the efficiency of these RGO-CdS nanocomposites on different bacterial and protozoan strains.

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“…The high-magnification TEM image in Figure 1I reveals the (220) plane of CdS with a lattice spacing of 0.29 nm, closely matching the standard reference for CdS (PDF # 80-0019). [21] Furthermore, EDS results indicate a uniform distribution of C, Cd, and S elements across the TEM scanning area (Figure 1J).…”

Section: Methodsmentioning

confidence: 93%

Complementary Weaknesses: A Win‐Win Approach for rGO/CdS to Improve the Energy Conversion Performance of Integrated Photorechargeable Li−S Batteries

Yang,

Mao,

Zhang

et al. 2024

Angew Chem Int Ed

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Integrating solar energy into rechargeable battery systems represents a significant advancement towards sustainable energy storage solutions. Herein, we propose a win‐win solution to reduce the shuttle effect of polysulfide and improve the photocorrosion stability of CdS, thereby enhancing the energy conversion efficiency of rGO/CdS‐based photorechargeable integrated lithium‐sulfur batteries (PRLSBs). Experimental results show that CdS can effectively anchor polysulfide under sunlight irradiation for 20 minutes. Under a high current density (1 C), the discharge‐specific capacity of the PRLSBs increased to 971.30 mA h g‐1, which is 113.3% enhancement compared to that of under dark condition (857.49 mA h g‐1). Remarkably, without an electrical power supply, the PRLSBs can maintain a 21 hours discharge process following merely 1.5 hours of light irradiation, achieving a breakthrough solar‐to‐electrical energy conversion efficiency of up to 5.04%. Ex‐situ X‐ray photoelectron spectroscopy (XPS) and in‐situ Raman analysis corroborate the effectiveness of this complementary weakness approach in bolstering redox kinetics and curtailing polysulfide dissolution in PRLSBs. This work showcases a feasible strategy to develop PRLSBs with potential dual‐functional metal sulfide photoelectrodes, which will be of great interest in future‐oriented off‐grid photocell systems.

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Dielectric and Conductivity Relaxation of rGO@CdS Nanocomposites via In Situ Assembly of CdS Nanoparticles on an rGO Layer

Cited by 10 publications

References 40 publications

Organic molecule functionalized lead sulfide hybrid system for energy storage and field dependent polarization performances

Organic molecule functionalized lead sulfide hybrid system for energy storage and field dependent polarization performances

Exploration of photoreduction ability of reduced graphene oxide–cadmium sulphide hetero-nanostructures and their intensified activities against harmful microbes

Complementary Weaknesses: A Win‐Win Approach for rGO/CdS to Improve the Energy Conversion Performance of Integrated Photorechargeable Li−S Batteries

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