Application of microwave irradiation in preparation and characterization of CuO/Al 2 O 3 nanocomposite for removing MB dye from aqueous solution

Sodeifian, Gholamhossein; Behnood, Reza

doi:10.1016/j.jphotochem.2017.03.038

Cited by 25 publications

(8 citation statements)

References 24 publications

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“…Some recent studies reported the synthesis of CuONPs and Al 2 O 3 NPs by various techniques, including pyrolysis, sol-gel, sputtering, laser ablation and electrochemical reduction [23][24][25][26][27][28][29][30][31][32]. Sodeifian and Behnood [33] reported a microwave-assisted method for the synthesis of CuO/Al 2 O 3 nanocomposite for photocatalytic degradation of methylene blue removal from aqueous solution under UV irradiation.…”

Section: Introductionmentioning

confidence: 99%

New Construction of Functionalized CuO/Al2O3 Nanocomposite-Based Polymeric Sensor for Potentiometric Estimation of Naltrexone Hydrochloride in Commercial Formulations

2021

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Electrically conductive polymeric nanocomposites with nanoparticles are adaptable types of nanomaterials that are prospective for various applications. The extraordinary features of copper oxide (CuO) and aluminium oxide (Al2O3) nanostructures, encourages extensive studies to prospect these metal oxide nanocomposites as potential electroactive materials in sensing and biosensing applications. This study suggested a new CuO/Al2O3 nanocomposite-based polymeric coated wire membrane sensor for estimating naltrexone hydrochloride (NTX) in commercial formulations. Naltrexone hydrochloride and sodium tetraphenylborate (Na-TPB) were incorporated in the presence of polymeric polyvinyl chloride (PVC) and solvent mediator o-nitrophenyloctyl ether (o-NPOE) to form naltrexone tetraphenylborate (NTX-TPB) as an electroactive material. The modified sensor using NTX-TPB-CuO/Al2O3 nanocomposite displayed high selectivity and sensitivity for the discrimination and quantification of NTX with a linearity range 1.0 × 10−9–1.0 × 10−2 mol L−1 and a regression equation EmV = (58.25 ± 0.3) log [NTX] + 754.25. Contrarily, the unmodified coated wire sensor of NTX-TPB exhibited a Nernstian response at 1.0 × 10−5–1.0 × 10−2 mol L−1 and a regression equation EmV = (52.1 ± 0.2) log [NTX] + 406.6. The suggested modified potentiometric system was validated with respect to various criteria using the methodology recommended guidelines.

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Section: Introductionmentioning

confidence: 99%

New Construction of Functionalized CuO/Al2O3 Nanocomposite-Based Polymeric Sensor for Potentiometric Estimation of Naltrexone Hydrochloride in Commercial Formulations

2021

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“…Recently several attempts were made in ZnO coupling with various narrow band gap semiconducting materials like ZnO-Fe 2 O 3 21,22 , ZnO-WO 3 21,22 , etc, to enhance the removal efficiency than bare ZnO under visible light irradiation. , CuO-Al 2 O 3 35 , by the microwave irradiation. In this study ZnO-PbS heterojunction was prepared under microwave irradiation method and their photocatalytic activities were investigated.…”

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confidence: 99%

Microwave assisted synthesis of ZnO-PbS heterojuction for degradation of organic pollutants under visible light

Ganapathy

Harinee

Sridhar

et al. 2020

Sci Rep

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PbS heterojunction were prepared by microwave irradiation to improve the organic pollutants degradation under visible light irradiation. Hexagonal (wurtzite) and cubic crystal structure of ZnO and PbS respectively were confirmed by PXRD. Nano-plate, nano-sponge and nano-sponge imprinted over nano-sheet like morphology of ZnO, PbS and ZnO-PbS respectively were revealed through FESEM analysis. HR-TEM analysis provides the formation of heterojunction. XPS analysis shows the presence of the ZnO-PbS heterojunction. UV-Visible spectroscopy confirms the enhanced visible light response of Zno-pbS heterojunction than the bare Zno. the pL and eiS results indicate ZnO-PbS heterojunction exhibited lowest recombination of excitons and electron transfer resistance. Synergistic effect of ZnO-PbS heterojunction leads to efficient degradation against organic pollutants than bare ZnO and PbS. Aniline and formaldehyde were successfully degraded around 95% and 79% respectively, under solar light irradiation. As-prepared photocatalysts obeys pseudo first order reaction kinetics. HPLC analysis also confirms the successful mineralization of organic pollutants into water and co 2 .Lead sulfide (PbS) has broad spectral response form visible to near-IR region due to its narrow direct band gap (0.41 eV). In recent years, PbS sensitized nanomaterial's are increased the visible light response and photo-conversion efficiencies. It has unique photo physical properties such as multi exciton generation (MEG), high absorption coefficients, size dependent optical properties and optoelectronic properties 23,24 .Recently, several methods are adopted for the preparation of ZnO-PbS heterojunction such as chemical bath deposition 25 , ultrasound deposition method 26 , low temperature method 27 , successive Ionic Layer Adsorption and Desorption method 28,29 , Radio Frequency Sputtering 30 and spin coating method 31 . In all the above methods, most of them have some difficulties and limitations to produce ZnO-PbS heterojunction such as long reaction time and cost of the equipment. Therefore, novel techniques required to overcome this problem to prepare the semiconductor coupled ZnO-PbS photocatalyst in large-scale production without any sacrification in efficiency.Microwave irradiation technique is a best alternative heating source for the preparation of nano materials due to its rapid chemical reaction with short span of time when compared to conventional methods. Microwave irradiation involves through dipolar polarization and ionic conduction, which helps for the preparation of nanostructured materials 32 . Microwave method is fast, uniform heat distribution, energy efficient and simple than other conventional methods. The size and morphology of the material can be easily controlled by the microwave parameters such as frequency, time and operating power. Therefore, microwave method is leading technique for homogeneous nucleation and fast crystallization, which leads to the preparation of nano-structured inorganic semiconductor photocatalyst. In recent ...

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“…As can be seen in Fig. 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 ].…”

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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Application of microwave irradiation in preparation and characterization of CuO/Al 2 O 3 nanocomposite for removing MB dye from aqueous solution

Cited by 25 publications

References 24 publications

New Construction of Functionalized CuO/Al2O3 Nanocomposite-Based Polymeric Sensor for Potentiometric Estimation of Naltrexone Hydrochloride in Commercial Formulations

New Construction of Functionalized CuO/Al2O3 Nanocomposite-Based Polymeric Sensor for Potentiometric Estimation of Naltrexone Hydrochloride in Commercial Formulations

Microwave assisted synthesis of ZnO-PbS heterojuction for degradation of organic pollutants under visible light

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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