Search query: application of cds based material

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abstract: The urgent need for clean and renewable energy drives the exploration of effective strategies to produce hydrogen. Semiconductor based photocatalytic hydrogen production technology is one of the ideal processes for direct solar energy conversion and storage that has been widely studied. The development of highly efficient photocatalysts is essential for the cost effective and large scale production of hydrogen. CdS based semiconductor photocatalysts have attracted significant attention due to their unique advantages, including strong visible light absorption capacity, suitable band edge levels and excellent electronic charge transfer. However, unlike TiO2 with good photostability, the intrinsic drawback of photocorrosion of CdS based semiconductors significantly challenges their durable application in photocatalysis. This review focuses on recent advances in material design and strategies for improving the anti photocorrosion of CdS based photocatalysts for applications in photocatalytic overall water splitting to produce hydrogen. Moreover, brief prospective development and challenges in the synthesis of anti corrosion CdS based photocatalysts are also presented.
author_names: Xiaofeng Ning

Gongxuan Lu
title: Photocorrosion inhibition of CdS based catalysts for photocatalytic overall water splitting.
venue: Nanoscale
year: 2020

abstract: Abstract Photocatalysts made of earth abundant elements using simple fabrication methods are highly desirable for bacterial inactivation in practical applications. This study proved that the carbon based g C3N4 could act as an effective antagonist to the ubiquitous plant pathogen Rhizobium radiobacter with good photostability and reusability under visible light. The applying of g C3N4 efficiently improved the survivability of tobacco seedlings under the stress of R. radiobacter and showed no adverse effect on tobacco growth compared with the common metal based TiO2 and CdS photocatalysts. The systematic mechanism studies revealed that the photoinduced reactive species (RSs) were strongly involved in the photocatalytic bacterial inactivation process, with an effectiveness of h+ *O2 *OH H2O2 e 1O2. The direct contact between g C3N4 and bacterial cells was also essential for the effective bacterial inactivation. Although bacterial self protection system (SOD and CAT enzymes) functioned in the initial period, the accumulated RSs damaged cell membrane structure as well as membrane associated respiration and ATP synthesis ability, finally leading to the leakage of cellular building blocks (K+ TOC, DNA and RNA) and irreversible cell death. This study illustrated that the g C3N4 could be used as an ideal photocatalytic bactericide towards agriculture application to improve the plant resistance to pathogens with good biocompatibility and low cost.
author_names: Kemeng Xiao

Tieyuan Liu

Panqing Yin

Xiaoning Ren

Jun Liang

Wugen Zhan

Jianhua Zhang

Bo Wang

Po Keung Wong
title: Effective photocatalytic inactivation of the plant pathogen Rhizobium radiobacter by carbon based material: Mechanism and agriculture application
year: 2020

abstract: Cadmium Sulfide (CdS) is one of the highly photo sensitive and good semiconductor material of II VI group elements. Cadmium Sulfide (CdS) have different applications in optoelectronic devices like solar cells, photo detectors etc. In the present work CdS thin films were deposited on ultrasonically cleaned glass substrates using sol gel spin coating technique. The structural, optical and surface morphologies of CdS thin films were investigated by X ray diffraction (XRD) analysis, UV Visible Spectrum analysis, Atomic Force Microscopy (AFM) and Scanning Electron Microscopy (SEM) The Crystallographic Structure was determined from XRD analysis. It reveals the films were Crystallized in Hexagonal phase with (0 0 2) plane. The Band gap is calculated from Tauc's plot from Absorbance Spectrum. The determined Band gap values of CdS thin films Decreases with Increase in Annealing Temperature. AFM gives the roughness of the CdS films. SEM studies reveals that the grains are spherically shaped and distributed uniformly over the entire surface of the glass substrate. Electrical Properties of the Cadmium Sulfide (CdS) thin films were studied with I V measurement system
author_names: B Ravi Kumar

S R Meher
title: Cadmium Sulfide (CdS) Based Thin Films for Photo Sensing Application
year: 2016

abstract: The invention belongs to the field of functional nano materials, sensing analysis and environment analysis, and provides a preparation method and application of a photoelectrochemical sensor for sensitively detecting Cd based on a ZnO and CdS compound semiconductor material. The preparation method comprises the steps of based on an ITO electrode as a substrate, inoculating ZnO seed crystal to the ITO electrode, and depositing CdS on the ITO electrode having crystallized ZnO through an electro deposition method based on NaS2SO3 as a sulfur source, Cd in an environment sample as a cadmium source and EDTA as a stabilizing agent, so that the photoelectric signal is greatly enhanced, the detection range is 0.01 5.0mmol/L, and the detection limit is 5micromol/L.
title: Preparation method and application of photoelectrochemical sensor for sensitively detecting Cd based on ZnO and CdS compound semiconductor material
year: 2015

abstract: Abstract A facile, efficient and novel strategy was developed for the preparation of reduced Graphene Oxide/Carbon Dots (rGO/CDs) by electrospinning and annealing of an organic polymer. In the present investigation, rGO/CDs was prepared from poly (vinylidene fluoride co hexafluoropylene) [P(VDF HFP] based nanofiber fabricated via electrospinning technique followed by calcination. Formation of rGO/CDs was confirmed with the help of X Ray diffraction (XRD) FTIR and XPS analyses indicate the presence of C and O in nanostructure, which demonstrates that this method can efficiently convert calcined polymeric nanofiber into rGO/CDs. FE SEM micrographs reveal the morphological changes of the nanofiber membrane during the calcination process. The material shows excellent property to detect dopamine (DA) In the case of CV, a linear relationship for the DA concentration is observed in the range of 0.5uM to 20uM and, linear regression equation is y 8.32667x 0.0524 through correlation coefficient (R2) 0.99174, with a detection limit of 1.41 uM. All the electrochemical measurements were performed in 0.1 M phosphate buffer solution (PBS) of pH 7.2 as a supporting electrolyte. Therefore, the rGO/CDs/GCE electrode can be effectively applied to the quantitative analysis of DA.
author_names: Vinit Sharma

Gun Anit Kaur

Neeraj Gupta

Mamta Shandilya
title: Growth mechanism of rGO/CDs by electrospun calcination process: Structure and application
year: 2020

abstract: Sewage discharge produced by homes and industries contains both oil and water soluble components. In order to remove oil from water, materials with specific wettability can be used; however, these materials cannot remove dissolved contaminants from water. In this research, we prepared a superhydrophobic CdS cotton for water purification. This material has the ability to adsorb different types of oil due to its non wettability (WCA 152deg) Moreover, its response behavior towards visible light enables it to remove water soluble pollutants as well. The highest oil absorption rate of superhydrophobic CdS cotton is nearly 30 times, and it can absorb light below 564 nm and produce *OH to degrade water soluble pollutants. Finally, based on Mott Schottky curve, the position of Fermi energy level was determined 0.55 eV) Also, the positions of valence and conduction bands were calculated based on the analysis of band gap which helps in proving photoelectric response characteristics.
author_names: Bo Ge

Guina Ren

Pengfei Zhao

Chuanyu Jin

Wenzhi Li

Zhenzhong Zhang
title: Preparation of superhydrophobic CdS cotton using visible light response and its application for the control of water pollution
venue: Science China Technological Sciences
year: 2019

abstract: Photocatalytic degradation of pollutants based on semiconductor quantum dots (QDs) can be applied in wastewater purification methods. However, application of free QDs was associated with some difficulties, such as oxidation and agglomeration of QDs and difficulties in separation. As a solution to these problems, we have proposed the production of mesoporous SBA 15 supported CdS quantum dots as a more stable photo catalyst. The efficiency of these prepared nanocomposites was examined for photocatalytic degradation of Alizarin, as an organic pollutant. Results demonstrated that the proposed material is a promising catalyst for photocatalytic degradation of dyes in wastewaters. The kinetic and adsorption isotherms of photocatalytic degradation process were also studied and a detailed mechanism proposed for degradation process. The proposed mechanism was studied using free radicals trapping experiments; results demonstrated that the \bullet \text{O}}_{2} $O2 radicals are active intermediates and have an important role in the photodegradation mechanism.
author_names: Abdolraouf Samadi-Maybodi

Mohammad-Rasool Sadeghi-Maleki
title: Preparation of Mesoporous SBA 15 Supported CdS Quantum Dots and Its Application for Photocatalytic Degradation of Organic Pollutants in Aqueous Media
venue: Journal of Inorganic and Organometallic Polymers and Materials
year: 2018

abstract: Abstract Cadmium sulphide (CdS) is the n type, wide band gap II VI semiconducting material by offering applications in photovoltaics. Among the range of applications offered by CdS thin films, it has found application as a window layer in second generation solar cells by creating photon traps, thereby quantum efficiency. Closed space sublimation (CSS) offers a trivial yet effective approach for the synthesis of thin films for solar cell applications at moderate temperatures. CdS thin films of controlled thicknesses were synthesized by CSS technique by varying exposure time. X rays diffraction data of these thin films revealed polycrystalline nature with a preferred orientation along (002) direction. The scanning electron microscopy (SEM) based morphological studies showed grain size variation with an increase in thickness of deposited thin films in the range of 300 500 nm. The electrical studies revealed high resistivity of the order of 106 O cm. Spectrophotometric studies performed for CdS thin films concluded with the calculation of the optical parameters such as refractive index, absorption coefficient employing the Swanepoel model, and energy band gap of ~2.42 eV using the Tauc relation in addition to thin film thickness confirmation. The variations in thickness affect the structure, surface, optical (Khan et al. 2018) electrical properties.
author_names: Waqar Mahmood

Junaid Ali

Iqra Zahid

Andrew G Thomas

Anwar Ul Haq
title: Optical and electrical studies of CdS thin films with thickness variation
year: 2018

abstract: Abstract Cd substituted tetrahedrite Cu10Cd2Sb4S13 (TH Cd) monograin powders were synthesized in molten CdI2 (as flux) with the aim to implement these materials as absorbers in monograin layer solar cells. Our study focuses on the influence of technological parameters, like the initial composition of precursors, the amount of CdI2 flux and temperature of synthesis, on the elemental and phase composition and on the size and shape of powder crystals. Based on energy dispersive X ray spectroscopy and X ray diffraction investigations, mainly single phase tetrahedrite with a composition close to the stoichiometry of Cu10Cd2Sb4S13 was formed at 480 and 495 degC. It was found that incorporation of Cd from CdI2 into formed crystals rised with increasing amount of CdI2 flux if no other Cd source (CdS) was used. It was shown for the first time that there are peaks at 94 97 cm 1 and 108 112 cm 1 in the Raman spectra of Cu12Sb4S13 and Cu10Cd2Sb4S13, respectively. Monograin powders grown at 495 degC were used as absorber material in monograin layer solar cells with a structure of ZnO/CdS/Cu10Cd2Sb4S13/graphite. The efficiency of the first TH Cd monograin layer solar cell was 0.14% The effective band gap value of Cu10Cd2Sb4S13 absorber was determined as 1.3 eV.
author_names: Fairouz Ghisani

Kristi Timmo

Mare Altosaar

Jaan Raudoja

Valdek Mikli

M Pilvet

M Kauk-Kuusik

Maarja Grossberg
title: Synthesis and characterization of tetrahedrite Cu10Cd2Sb4S13 monograin material for photovoltaic application
year: 2020

abstract: Abstract This paper reports an inclusive study of synthesis and characterization of quantum dots CdS embedded Pb0.85La0.15TiO3 (PLT15) dielectric nanocomposite materials for application in thin film quantum dots solar cells (QDSSc) We have synthesized dielectric materials which act as a strong field effect passivation, screened columbic attraction, back reflector and recombination inhibitor for solar cell fabrication. This material was deposited on FTO/TiO2 layer with a uniform mixed layer of nanorod (CdS) nanoparticles (PLT15) which result in an increase in the SCs efficiency by times higher from the reference value. By adding dielectric materials in a prototype solar cell, an enhancement of 6.32 mA/cm2 in short circuit current and an absolute value of 4.5% enhancement in overall conversion efficiency are achieved. In particular, synthesis of materials, fabrication, structural, optical, electrical and stability of the prototype SCs are examined thoroughly. We also performed a detailed investigation of aging on the main characteristics of solar cells, such as efficiency, fill factor, short circuit current and open circuit voltage. It was observed that due to its cost effectiveness, stability, and enhance efficiency, this dielectric based hybrid thin film solar cells have high potential to be applied in industry in the near future.
author_names: Argha Dey

Poulami Karan

Abhinanda Sengupta

Sk Abdul Moyez

Poulomi Sarkar

Subhasish Basu Majumder

Debabrata Pradhan

Subhasish Roy
title: Enhanced charge carrier generation by dielectric nanomaterials for quantum dots solar cells based on CdS TiO2 photoanode
year: 2017