Visible light induced photocatalytic degradation of methylene blue and rhodamine B from the catalyst of CdS nanowire

Ganesh, R. Sankar; Elamaran, Durgadevi; Navaneethan, M.; Sharma, Sanjeev K.; Binitha, H.S.; Ponnusamy, S.; Muthamizhchelvan, C.; Hayakawa, Y.

doi:10.1016/j.cplett.2017.06.021

Cited by 53 publications

(12 citation statements)

References 48 publications

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“…The RhB degradation takes place in two reaction steps: (1) gradual diethylation and (2) chromophore structure decomposition when the reactive oxygen species (ROS) generated in the reaction medium during the light illumination. But MB degradation goes through only step (2) chromophore structure decomposition [59] where chromophore decomposition consists of double bond breaking present in benzene ring.…”

Section: Resultsmentioning

confidence: 99%

Effect of induced defects on the properties of ZnO nanocrystals: surfactant role and spectroscopic analysis

2019

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Semiconductor photocatalysts are one of the major sought area of research due to their extensive use in the degradation of organic pollutants under UV-visible and solar light. Herein, we are reporting the synthesis of microscopic spindle shaped ZnO photocatalysts with different reducing agents such as sodium hydroxide, hydrazine hydride, sodium borohydride and lithium triethyl borohydride. These spindle shaped ZnO are synthesized by facile soft chemical approach by varying reducing agents with fixed molar ratio at 1:2 zinc precursor to reducing agents. These ZnOs were thoroughly characterised by various sophisticated characterization techniques such as XRD, FTIR, SEM, and HRTEM, Raman and ESR spectroscopies. Microscopic results show that these ZnO show similar fusiform morphologies with the variation in sizes and their distributions, and hence possess different defect related properties. The structural growth mechanism and defect related properties were explained on the basis of different reducing abilities of reducing agents (different reaction pH) and their nucleation with the aid of morphological analysis, and ESR analysis. Furthermore, the photocatalytic activity of these spindle shaped ZnO were evaluated against two cationic dyes (methylene blue dyes, Rhodamine B) under UV light. The photocatalytic results show that these spindle shaped ZnO are very effective for the photo-catalytic degradation of methylene blue and rhodamine B dye under the illumination of UV light.

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Section: Resultsmentioning

confidence: 99%

Effect of induced defects on the properties of ZnO nanocrystals: surfactant role and spectroscopic analysis

2019

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“…A Pd-supported Cu-doped Ti-pillared montmorillonite catalyst was synthesized for MB degradation [3], and modified TiO 2 /BiVO 4 photocatalysts were found to be active in the degradation of MB [4]. Mn-doped ZrO 2 nanoparticles [5], an MgO-SC CA-Zn hybrid ozonation catalyst [6], Fe 3 O 4 /TiO 2 core/shell nanocubes [7], magnetic SrFe 12 O 19 [8], ZnO/NiFe 2 O 4 nanoparticles [9], Co-Mn-Fe complex oxide catalysts [10], CdS nanowire [11], silver nanoparticle decorated polymeric spheres [12], and Au/ZnO-CeO 2 [13] have been reported for MB degradation.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Methylene Blue over TiO2 Pretreated with Varying Concentrations of NaOH

2018

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In this paper, different NaOH concentrations (2, 5, 10, and 15 M) were used to treat {001}TiO2. The effect of NaOH on the crystal structure, morphology, optical properties, light raw electronic-hole recombination, and degradation performance of {001}TiO2 on methylene blue were studied. The results demonstrate that rutile TiO2 appeared when the NaOH concentration was as high as 10 M, showing much better photolytic performance than others. As the concentration of sodium hydroxide increases, the morphology changes accordingly. The specific surface area increases and the optical electronic-hole recombination rate decreases. Radical scavenging tests showed that hydroxyl radical and hole are very important in photocatalysis.

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“…11 a, the peaks at 1010, 949, and 599 cm −1 correspond to the bonds of metallic compounds and M–OH modes of product [ 43 – 45 ]. The absorption peaks around 3400 and 1600 cm −1 related to the stretching and bending vibration of O–H bond, respectively [ 44 – 46 ]. The peaks between 1100 and 1500 cm −1 are in accordance with the C–H stretching band.…”

Section: Resultsmentioning

confidence: 99%

“…Figure 11 b shows the peaks at 1368, 1260, 1118, and 1006 cm −1 of 0.3 HEC-Sb 2 S 3 adsorbed by MO sample were attributed to the C–N vibrations, C–N aromatic stretching vibrations, the vibration of C–N bonds, and C–H in-plane bending vibration of benzene rings of MO molecules, respectively [ 9 , 14 , 47 ]. Figure 11 c shows the peak at 1010 cm −1 of 0.3 HEC-Sb 2 S 3 adsorbed by MB was broadened compare to 0.3 HEC-Sb 2 S 3 —caused by the bonding with 0.3 HEC-Sb 2 S 3 and MB molecules [ 45 , 46 ]. Moreover, the rather strong peak at 949 cm −1 can be attributed to modes form as a result of H-bond of the type N het ··· HO (stretching heterocycle ··· HO) [ 48 ].…”

Section: Resultsmentioning

confidence: 99%

The Photocatalytic Application of Semiconductor Stibnite Nanostructure Synthesized via a Simple Microwave-Assisted Approach in Propylene Glycol for Degradation of Dye Pollutants and its Optical Property

et al. 2017

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Stibnite (Sb2S3) semiconducting material was successfully synthesized by a rapid and facile microwave route using antimony chloride (SbCl3) and sodiumthiosulfate (Na2S2O3) dissolved in propylene glycol (PG) containing different hydroxyethyl cellulose (HEC) masses. The phase identification, morphology, and elemental composition of products were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), field- emission scanning electron microscopy (FE-SEM), energy dispersive X-ray (EDX) spectroscopy, and Fourier transform infrared spectroscopy (FTIR). The results revealed the orthorhombic phase of Sb2S3 single crystal-forming sheaf-like nanostructure, and a possible formation mechanism was proposed and discussed. Its direct band gap calculated from UV-visible absorption is 1.60 eV. In this research, the photocatalytic activities of Sb2S3 nanostructure were investigated through the degradation of methyl orange (MO) and methylene blue (MB) under visible light irradiation. The as-obtained 0.30 g HEC-added solution (0.3 HEC-Sb2S3) photocatalyst exhibited better photocatalytic activity than the other products, which degraded 91% of MO within 300 min and 90% of MB within 240 min under the Xe-lamp irradiation. The first-order plot was fitted with this experiment which the rate constant (k) of 0.3 HEC-Sb2S3 for MO and MB degradation are 0.0085 and 0.0098 min−1, respectively. Therefore, the new experience with a novel and simple synthetic procedure of Sb2S3 photocatalyst that exhibits the characteristics of a highly effective photocatalyst under visible light irradiation was discovered.

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Visible light induced photocatalytic degradation of methylene blue and rhodamine B from the catalyst of CdS nanowire

Cited by 53 publications

References 48 publications

Effect of induced defects on the properties of ZnO nanocrystals: surfactant role and spectroscopic analysis

Effect of induced defects on the properties of ZnO nanocrystals: surfactant role and spectroscopic analysis

Photocatalytic Degradation of Methylene Blue over TiO2 Pretreated with Varying Concentrations of NaOH

The Photocatalytic Application of Semiconductor Stibnite Nanostructure Synthesized via a Simple Microwave-Assisted Approach in Propylene Glycol for Degradation of Dye Pollutants and its Optical Property

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