Cadmium Acetate Solution Research Articles

Impact of Polyamide Surface Preparation on the Formation of Mixed CdS-CdTe Layers

CdTe-CdS layers were formed on polyamide (PA) 6 films with different surface modifications using the sorption-diffusion method. Part of the samples of the PA films was boiled in distilled water for 2 h and the other ones were stored in concentrated acetic acid at 20 °C for 0.5 h. After this stage, all the PA 6 films were chalcogenized at 20 °C for 1 or 5 h using an acidified 0.1 mol/L solution of K2TeS4O6. Then, the chalcogenized samples were treated with a 0.1 mol/L solution of cadmium acetate at 70, 80 or 90 °C for 10 min. The elemental and phase composition and the morphological and optical properties of the obtained films were determined. XRD analysis showed that cadmium chalcogenide layers consist of four phases: hexagonal CdTe, orthorhombic CdS, rhombohedral Te and orthorhombic S18. The average crystallite size among the obtained layers was very similar and was in the range of 36–42 nm. The concentrations of cadmium, sulfur and tellurium in the layers on PA 6 and the optical properties of the CdTe-CdS layers were dependent on the method of preparation of the polyamide film, the duration of chalcogenization and the temperature of the Cd(CH3COO)2 solution.

The effect of high concentrations of heavy metals on the integrity by intestinal epithelium of carp

The article is devoted to the assessment of the toxic effects of heavy metals on the body of fish. The aim of the study was to study the integrity of the epithelial layer of the carp intestine after exposure to heavy metals (lead, cadmium, zinc, copper and cobalt). In the experiment, 6 groups of fish (european carp) of 10 individuals were used: control; groups of fish contained in solutions of heavy metals exceeding their MPC in reservoirs by 1000 times: in a solution of lead acetate (6 mg/l); in a solution of cadmium acetate (5 mg/l); in a solution of copper acetate (1 mg/l); in zinc acetate solution (10 mg/l) and in cobalt acetate solution (10 mg/l). The exposure in toxicant solutions was 4 hours. Smears-prints of carp intestines were made and with the help of light microscopy, the sloughed "living" cells were counted. The dominant influence of copper on the strength of the intestinal epithelium of fish in comparison with other metals investigated was noted.

Effect of pH on the Structural and Optical Properties of Cadmium oxide Thin Films Prepared Using the Successive Ionic Layer Adsorption and Reaction (SILAR) Method

Cadmium oxide (CdO) thin films were deposited using the sequencing ion layer adsorption and reaction (SILAR) method. In this study, the effect of the pH value of an aqueous solution of cadmium acetate at a concentration of 0.2 mol of the cadmium oxide film was determined. The solution source for the cadmium oxide film was cadmium ions and an aqueous ammonia solution. The CdO films were deposited on glass substrates at a temperature of 90 ℃. The cadmium oxide film thickness was determined by the weight difference method at pH values ​​(7.2, 8.2). X-ray diffraction (XRD) and scanning electron microscopy (SEM) showed that the size of the crystals increased with the increase in the solution (pH). While the UV-visible spectra of the films revealed that the optical band gap energy decreases with increasing (pH) of the CdO solution. The absorbance spectrum of the cadmium oxide film was recorded in the wavelength range (300 – 900) nm. The change in the pH of the cadmium acetate aqueous solution from the energy gap and X-ray diffraction calculations showed that the film had an optical band gap energy and that the highest intensity was at (111) and that the membrane is n-type, as shown by studies to prepare the cadmium oxide membrane using the SILAR method.

Effect of Photoconductivity Precursor Volume on Structural, Physical, Electrical and Optical Properties of Thin Layers of Cadmium Oxide (CdO) Nanostructures Produced Using Spray Pyrolysis Technique

Thin layers of Cadmium Oxide (CdO) are produced over glassy substrate by spray pyrolysis technique with precursor volumes of 50, 75 and 100 (ml). FESEM images of samples show the formation of nanometric structures and structural characterization of them resulted from XRD spectroscopy indicate the formation of cubic polycrystalline structure in growing layers with preferred direction of (111). Evaluating the optical properties of samples show that optical band gap of layers is reduced from 3.6 to 3.4 (eV) by increasing the precursor volume and the optical absorption coefficient of samples is in UV region at about 105 (cm-1). Data analysis indicates that the produced sample in volume of 100 mL has the smallest penetration depth (smaller than 200 nm) in UV region. On the other hand, thin layers of Cadmium Oxide (CdO) with various volumes of Cadmium acetate solution (40, 50 and 70 ml) were deposited using spray pyrolysis technique over a glassy substrate. Samples were investigated using FESEM images, XRD and UV-Vis spectra as well as I-V characteristic. It was found that all samples were grew up with polycrystalline nanostructures along the preferred direction of (002). In addition, it was found that grew up sample in the volume of 50 (ml) are of optimum photoconductivity condition in visible range regarding optimum structural (largest crystallite size and lowest crystallite defect density) and optical (smallest band gap and highest light absorption) conditions.

Preparing and Studying Structural and Optical Properties of Pb1-xCdxS Nanoparticles of Solar Cells Applications

Nanoparticles of Pb1-xCdxS within the composition of 0≤x≤1 were prepared from the reaction of aqueous solution of cadmium acetate, lead acetate, thiourea, and NaOH by chemical co-precipitation. The prepared samples were characterized by UV-Vis spectroscopy(in the range 300-1100nm) to study the optical properties, AFM and SEM to check the surface morphology(Roughness average and shape) and the particle size. XRD technique was used to determine the crystalline structure, XRD technique was used to determine the purity of the phase and the crystalline structure, The crystalline size average of the nanoparticles have been found to be 20.7, 15.48, 11.9, 11.8, and 13.65 nm for PbS, Pb0.75Cd0.25S, Pb0.5Cd0.5S, Pb0.25Cd0.75S, and CdS respectively. The results indicate that crystalline structure of all prepared samples is cubic except CdS which shows hexagonal and cubic structure. The particle size was found within the range of (64.81 to 91.14) nm, with a high purity.

Ferroelectric Aspect and Phase Transitions of Solid Solution of Cadmium Acetate with Aluminium (III) Oxide

The behavior of variation of dielectric constant with temperature of solid solution of Cadmium Acetate Cd(C2H3O2)2 with Aluminium (III) Oxide Al2O3 and other dielectric parameters have been measured between the temperatures 35°C to 100°C using the capacitance bridge model ZENITH-FM89A and Q meter at the frequency of 2000 Hz. In the measurement, it have been observed that the compound has lower value of dielectric constant (ε = 1580) below 36ºC, which rises upto a value of 5600 at the moderate temperature of 45ºC. After this temperature, the dielectric constant of compound decreases upto the value of nearly 3521 at the temperature of 75ºC and a high peak at the temperature of 76°C (ε = 7000) in the heating cycle curve with some fluctuations.. When the variation of dielectric constant was studied in cooling cycle the peak was observed at 62ºC(ε = 6500), above and below this temperature dielectric constant decreases with some intermediate fluctuations and by increasing aluminium oxide content in the mother compound, its quality factor also increases with a little effect on dielectric constant. The cooling cycle curve does not follow heating curve because of the relaxor behaviour of the compound. The results have been explained on the basis of crystal structure changes and the possibility of free internal rotation of acetate groups within the crystal lattice at elevated temperature. One of the advantages of Cd(C2H3O2)2 with Al2O3 is that by varying the Aluminium Oxide content, one can control temperature coefficient of resonant frequency τf without affecting the other properties. This is important for many ferroelectric applications because τf of near about low value is not always required. A non-zero τf is often preferable to compensate for frequency variation due to the effect of temperature change on the resonator housing and dielectric support structure. Solid solution of Cadmium Acetate with Aluminium Oxide suggests for its valuable applications as dielectric material with excellent properties useful in ceramics engineering and communication system. KEY WORDS: Polarization, Quality Factor, Dielectric Constant, Phase Transition, Curie temperature, Resonant Frequency and Ceramics Engineering.

THE EFFECT OF SOLUTION TEMPERATURE ON CHEMICALLY MANUFACTURED CdS SAMPLES

In this paper, CdS samples were chemically coated onto glasses from an aqueous cadmium acetate solution. The resultant samples were analyzed depending on the solution temperature (ST) varied between 65 and 85 °C. Structural analysis confirmed that the ST plays a significant role on the crystallinity. A better crystallization was achieved at the ST of 80 °C. The direct optical band gaps were found to be in the range of 2.18 to 2.42 eV. The ST exhibited a remarkable influence on the surface morphology. Increasing ST from 65 to 80 °C significantly reduced the surface roughness and particle size. The sample chemically produced at the ST of 85 °C exhibited the highest surface roughness and the largest particle size. There was a good relationship between the energy band gap and the surface morphology. Further morphological analysis showed that the ST does not play a role on the surface texture. The highest crystallinity, the lowest surface roughness, the smallest particle size, the lowest band tail energy and the highest optical band gap (2.42 eV) were obtained for the sample manufactured at the ST of 80 °C, indicating that the optimum ST was 80 °C under the applied experimental conditions.

Synthesis and characterization of microbial mediated cadmium oxide nanoparticles.

Microbial mediated synthesis of metallic nanoparticles constitutes as effective and promising approach for the development of antibacterial materials in the field of bioengineering and biomedicine. We prepared Cadmium oxide nanoaprticles (CdO NPs) utilizing Penicillium oxalicum, and cadmium acetate solution via coprecipitate method. The elemental composition and morphology of these synthesized CdO NPs were examined through X-ray diffraction (XRD), UV-Vis absorption spectroscopy, Fourier transform infrared spectroscopy (FTIR), Scanning electron microscopy (SEM), and Energy dispersive spectroscopy (EDS). Furthermore, we evaluated the bactericidal potential of prepared CdO NPs using Escherichia coli (E.coli), Staphylococcus aureus (S.aureus), Bacillus cereus (B.cereus), and Pseudomonas aeruginosa (P. aeruginosa). Dimethyl sulfoxide was used as negative control while erythromycin was used as positive control. The XRD spectrum revealed cubic crystalline nanoparticles with 22.94 nm size and UV showed absorbance peak at 297 nm with 2.5 eV band gap energy. FTIR depicted O─H and carboxylic groups along with CdO stretching vibration. EDS showed the presence of organic compounds on Cd and O over NPs surface. SEM results revealed the spherical shape of the CdO NPs. The synthesized NPs exhibited highly potent bactericidal activity against selected strains and demonstrated less optical density of 0.086 after 24 hr. Owing to the significant antibacterial activity of CdO NPs, the broad application prospects of these nanoparticles CdO NPs in extensive biomedical applications is indicated.

Microbial synthesized cadmium oxide nanoparticles induce oxidative stress and protein leakage in bacterial cells

The bactericidal activity of metal oxide nanoparticles (NPs) offers extensive opportunities in bioengineering and biomedicines. Bioengineered transition metals used in various forms against lethal microbes. In this study, Cadmium Oxide nanoparticles (CdO-NPs) were prepared through the co-precipitation method using fungal strain Penicillium oxalicum and cadmium acetate solution. The structure and elemental composition of the prepared NPs were determined by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), UV–Vis absorption spectroscopy, scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). Antibacterial activity was assessed through well diffusion method against Staphylococcus aureus (S. aureus), Shigella dysenteriae (S. dysenteriae), and Pseudomonas aeruginosa (P. aeruginosa). In addition, reactive oxygen species (ROS), reducing sugars and protein leakage contribution was examined against selected strains. The XRD analysis proved that the synthesized CdO-NPs possess a crystalline structure with an average crystalline size of 40–80 nm. FTIR confirmed the presence of organic compounds on the particle surface, while UV showed stability of the particles. SEM and EDS confirmed that CdO-NPs were successfully prepared and spherical. The maximum zone of inhibition against S. dysenteriae and P. aeruginosa was found and showed a less optical density of 0.086 after 18 h. ROS, reducing sugar, and protein leakage assay showed a significant difference as compared to control. Based on the present study, it is recommended that microbial mediated synthesized nanoparticles can be used as biomedicines for the treatment of different types of bacterial infections.

ВЛИЯНИЕ КАДМИЯ НА ГЕМАТОЛОГИЧЕСКИЕ ПОКАЗАТЕЛИ КАРПА

The article is devoted to the assessment of the toxic effects of cadmium acetate on fish. The research topic is relevant, since heavy metals, and especially cadmium, are ones of the most dangerous pollutants for the aquatic environment. After the emission of the already used water by the electricity-power plants into the reservoirs of circulating wa-ter, a sharp increase in the maximum permit-ted concentrations of heavy substances can be observed often, which act on hydrobi-onts for a rather short period of time. That is why, modeling this effect is necessary to study the effects of heavy metals. The aim of the assay was to study the hematological parameters of carp after exposure to various concentrations of cadmium acetate. During the experiment, 5 groups of fish were formed - 1 control group (10 fish), 4 experimental groups - 10 fish each. The experimental groups of fish were exposed in a solution of cadmium acetate (Cd (CH3COO) 2) with concentrations of 0.05 mg / l, 0.5 mg / l, 5 mg / l, 50 mg / l (exceeding the maximum permissible concentration of cadmium for fisheries in 10, 100, 1000 and 10000 times respectively). We have investigated: the erythrocyte sedimentation rate, the number of red blood cells in the blood and the con-centration of hemoglobin in the blood. Dur-ing the study, the authors noted an increase in the erythrocyte sedimentation rate due to the formation of conglomerates of blood cells with plasma proteins, as well as a de-crease in the number of red blood cells due to the toxic effect of cadmium acetate. A decrease in the concentration of hemoglobin in the blood was also observed, probably associated with a decrease in the number of red blood cells due to their lysis. With an increase in the concentration of the metal under study, there is a significant increase in ESR, a decrease in the level of hemoglobin and the number of red blood cells.

Study of Anti-Cancer Properties of Thin Layers of Cadmium Oxide (CdO) Nanostructure

Thin layers of Cadmium Oxide (CdO) with various volumes of Cadmium acetate solution (60, 80 and 90 ml) were deposited using spray pyrolysis technique over a glassy substrate. Samples were investigated using FESEM images, XRD and UV-V is spectra as well as I-V characteristic. It was found that all samples were grown up with polycrystalline nanostructures along the preferred direction of (002).

Protective activity of sweet sorghum and sugarcane syrups against oxidative stress induced by cadmium in albino rats

The present study was designed to investigate the effect of sweet sorghum and sugarcane syrups as antioxidants on oxidative stress biomarkers and the lipid profile i.e. serum total triglyceride (TG), total cholesterol (TC), high density lipoprotein cholesterol (HDL-C) and low density lipoproteins cholesterol (LDL-C)) in male rats. Cadmium was received orally to rats daily at a dose of 10mg/L in drinking water. Rats were divided into four groups,-eight rats for each- as follow: (I) control group, (II) cadmium treated group, (III) sweet sorghum syrup solution (500 ppm) once daily at a dose of 1 ml/kg body weight of cadmium acetate solution, (IV) sugarcane syrup solution (500 ppm) and cadmium acetate solution. Bioactive compounds of syrups under investigation were identified, total phenolic and flavonoid contents were determined as well. Results cleared that the effect of variation in varieties on total phenol (mg GAE/ml sample) and antioxidant activity determined by 2,2-diphenyl-1-picrylhydrazyl radical (DPPH) assay of syrup was significant (P≤0.05) while it was not significant (P˃0.05) on total flavonoid (mg CE/ml sample).The highest total phenolic content was recorded by sweet sorghum syrup (1.87 mg GAE/ml sample) meanwhile, total flavonoid content varied between (1.09 and 1.36 mg CE/ml sample). Results also cleared that G.T.54-9 sugarcane and Rex sweet sorghum syrup samples exhibited significant (P≤0.05) scavenging activity compared to commercial sugarcane sample that gave lower scavenging activity (97.16, 96.07 and 74.22, respectively).Sweet sorghum and sugarcane syrups significantly affected (P≤0.05) absolute weight of organs and relative weight of both heart and kidney, while the effect on relative weight of liver was not significant (P>0.05). The treatment of sweet sorghum and sugarcane syrups during cadmium acetate administration in rats led to reduction in alanine transaminase (ALT), aspartate transaminase (AST), antioxidant enzymes, urea, creatinine and biomarkers in rat livers, like reduced glutathione , catalase ,malondialdehyde ,serum total triglyceride, total cholesterol, high density lipoprotein cholesterol and low density lipoproteins cholesterol back near to normal when compared to control rats. In general, the treatment with sugarcane syrup reduced the cadmium acetate induced hepatotoxicity in rats.

Impact of electrolyte concentration on the supercapacitive properties of spray pyrolyzed CdO thin film electrode

In present work, a facile spray pyrolysis technique has been applied for the synthesis of cadmium oxide (CdO) thin films at 673 K using aqueous cadmium acetate solution and reported. Primarily, as-synthesized CdO thin films are characterized for their structure and surface morphology corroborations and afterward used for energy storage applications. X-ray diffraction and X-ray photoelectron spectroscopy analysis supports to the formation of cubic crystalline phase of CdO. A homogeneous network of elongated rod-type surface morphology of CdO films was confirmed through scanning electron microscopy analysis. In addition, hydrophilic character of CdO thin film was corroborated through contact angle measurement. Electrochemical properties of as-synthesized CdO thin film electrode was studied in various aqueous electrolytes by means of cyclic voltammetry, charge-discharge, and impedance spectroscopy techniques and discussed. Electrochemical studies of CdO thin film electrode demonstrates a maximum specific capacitance of 344 F/g at 5 mV/s scan rate in 2 M KOH electrolyte.

Development of new 116Cd/Pt target for cyclotron produced 117mSn as a medical radiometal

The radioisotope 117mSn has recently attracted considerable attention because of its application in theranostics and its imaging using 159-keV γ-photons. In this study, we developed a target system that yielded 117mSn via a 116Cd(α, 3n)117mSn nuclear reaction. A separable Pt substrate was utilized to prepare the enriched 116Cd target to be irradiated, and the enriched 116Cd in a cadmium acetate solution was electroplated onto the Pt substrate. The substrate was thermally analyzed via ANSYS simulations, and the plating thickness was optimized through calculations with TALYS code. The production of 117mSn was confirmed through the emission measurement of inherent gamma rays.

A new nanocomposite superionic system (CdHgI4/HgI2): Synthesis, characterization and experimental investigation

In this paper, we report a new and convenient synthetic method based on a reaction in an aqueous system, which can produce a new nanocomposite superionic system (CdHgI4/HgI2) at 70°C for 20min. It is the first time that these nanocomposites are synthesized. In this work, we have chosen lithium iodide, cadmium and mercury acetate as starting reagents. First, an aqueous solution of cadmium acetate, surfactant and lithium iodide is obtained. Second, an aqueous solution of mercury acetate and lithium iodide is prepared. Then obtained solution is added to the first solution. The effects of the surfactant and mole ratio of Cd:Hg have been optimized to achieve the best products on morphology and purity. When the molar ratio of Cd:Hg is 1:1, in the absence of surfactant also in the presence of CTAB and Triplex, pure aggregated nanostructures are formed. The nanocomposites are characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and cyclic voltammetry (CV). The electrical conductivity measurement carries out at frequencies of 100Hz, 1000Hz, 10kHz and 100kHz in the temperature range 70–140°C. Results show that the best morphology and purity have been achieved in the absence of surfactant, in 1:1 ratio of precursors.

Role of growth conditions on optical and electrical properties of fiber structured Zn0.90Cd0.1O thin films

Fiber structured Zn0.90Cd0.1O films were obtained on glass substrate using zinc acetate and cadmium acetate solution through chemical spray pyrolysis method. All the deposited films are polycrystalline with hexagonal wurtzite structure. The average crystalline size of the deposited films were estimated through intensity of diffraction peak corresponding (101) plane, which is observed to increase with increase substrate temperature. The films deposited at 673 and 723 K have fibrous structure irrespective of the precursor concentration. The presence of Cd in the deposited films was confirmed by EDAX. The high transparency around 90% in visible region was observed for the sample deposited at 723 K using 0.0125 M concentration. It is seen that the optical energy band gap varies from 2.85 to 3.05 eV as the deposition temperature is changed from 673 to 723 K. The film deposited using 0.05 M concentration had low Urbach energy values compared to other molar concentrations confirming the minimization of defect states in these samples. With increasing deposition temperature the near band edge peak of photoluminescence spectrum shifted towards shorter wavelengths and in the same spectrum the weak green emission may be due to presence of singly ionized oxygen ion. The estimated activation energy of the deposited films was observed to decrease with increasing temperature and precursor concentration.

Biomineralized CdS Quantum Dot Nanocrystals: Optimizing Synthesis Conditions and Improving Functional Properties by Surface Modification

An engineered strain of Stenotrophomonas maltophilia (SMCD1) is capable of the direct extracellular biomineralization of CdS quantum dot nanocrystals from buffered aqueous solution of cadmium acetate and l-cysteine without the addition of a chemically reactive precursor. Nanocrystal synthesis is strongly influenced by both the l-cysteine/cadmium acetate ratio and pH of the solution. The observed trends are consistent with l-cysteine acting as both a sulfur source and nanocrystal capping agent. Enzymatic turnover of l-cysteine by a putative cystathionine γ-lyase forms reactive sulfur in solution, removing the requirement for addition of reactive sodium sulfide typical of most other biomineralization approaches. The utility of the biomineralized quantum dots is demonstrated by phase transfer from the aqueous to the organic phase and subsequent incorporation into a quantum dot sensitized solar cell and chemical growth of a ZnS shell onto the biomineralized CdS core.

Long-term effects of perinatal exposure to low doses of cadmium on the prostate of adult male rats.

Developmental toxicity caused by environmental exposure to heavy metals during the perinatal period has raised questions about offspring health. Cadmium (Cd) is an endocrine-disrupting chemical with the potential to interfere with morphogenesis and susceptibility to diseases in reproductive organs. Taking into account that in the rat prostate morphogenesis occurs during the perinatal period, and that pregnant females absorb and retain more dietary Cd than their non-pregnant counterparts, it is important to understand the effects of perinatal Cd exposure on the adult rat prostate. Therefore this study investigated the effects of gestational and lactational Cd exposure on adult offspring rat prostate histopathology. Pregnant rats (n=20) were divided into two groups: Control (treated with aqueous solution of sodium acetate 10mg/l) and treated (treated with aqueous solution of cadmium acetate 10mg/l) administered in the drinking water. After weaning, male offspring from different litters (n=10) received food and water 'adlibitum'. The animals were euthanized at postnatal day 90 (PND90), the ventral prostates (VPs) were removed, weighed and examined histopathologically. Blood was collected for the measurement of testosterone (T) levels. Immunohistochemistry for androgen receptor (AR) and Ki67, and a TUNEL assay were performed. There were no differences in T levels, cell proliferation and apoptosis indexes, or AR immunostaining between the experimental groups. Stromal inflammatory foci and multifocal inflammation increased significantly in the treated group. These changes were associated with inflammatory reactive epithelial atypia and stromal fibrillar rearrangement. In conclusion, VP was permanently affected by perinatal Cd exposition, with increased incidence of inflammatory disorders with ageing.

Single-enzyme biomineralization of cadmium sulfide nanocrystals with controlled optical properties

Nature has evolved several unique biomineralization strategies to direct the synthesis and growth of inorganic materials. These natural systems are complex, involving the interaction of multiple biomolecules to catalyze biomineralization and template growth. Herein we describe the first report to our knowledge of a single enzyme capable of both catalyzing mineralization in otherwise unreactive solution and of templating nanocrystal growth. A recombinant putative cystathionine γ-lyase (smCSE) mineralizes CdS from an aqueous cadmium acetate solution via reactive H2S generation from l-cysteine and controls nanocrystal growth within the quantum confined size range. The role of enzymatic nanocrystal templating is demonstrated by substituting reactive Na2S as the sulfur source. Whereas bulk CdS is formed in the absence of the enzyme or other capping agents, nanocrystal formation is observed when smCSE is present to control the growth. This dual-function, single-enzyme, aerobic, and aqueous route to functional material synthesis demonstrates the powerful potential of engineered functional material biomineralization.

Synthesis and growth mechanism of CdO nanoparticles prepared from thermal decomposition of CdSO3 nanorods

In the present study, the transformation of acidic solution of cadmium acetate and sodium dithionite into CdSO3 nanorods through microemulsion/hydrothermal reaction is reported. The reaction time and microemulsion media are two factors that subjected to investigation. The reaction time was found to be crucial for the formation of nanorods but the microemulsion media have no important effect on the morphology of the products. The CdSO3 nanorods were yellow crystalline product having diameter of 70 nm as observed from scanning electron microscopy (SEM) results. The X-ray diffraction (XRD) pattern clearly shows the formation of CdSO3. The CdO nanoparticles (43 nm) were obtained by thermal decomposition of CdSO3 product at 700 °C. Powder XRD and SEM microscopy were used to characterize the obtained nanoparticles. The XRD analysis confirmed the purity of the as-prepared CdO. The reasonable growth mechanism for the formation of CdSO3 and CdO were also proposed. The direct band gap of the CdO nanoparticles showed blue shift of 1.0 eV, comparing with that of the bulk CdO.