Highly efficient visible photocatalytic degradation of MB organic dye by heteromorphic ZnO/AZO/ZnO nanocatalysts: effect of AZO thickness

Binazir, Maryam Baradaran; Ghodsi, F. E.

doi:10.1007/s10971-019-05081-5

Cited by 15 publications

(1 citation statement)

References 86 publications

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“…The peak corresponding to NBE seems to be decreased for oxalic-acid-assisted WO 3 nanoparticles, but the intensity of the peak arising from defects or oxygen vacancies seems to be higher, which indicates the presence of more defects in it. It has been reported that the oxygen vacancies/interstitials on the surface of metal oxide nanoparticles can act as a scavenger of electrons and holes, which will reduce the recombination of photogenerated electrons and holes, and it is the prime factor responsible for enhancing the degradation efficiency of a catalyst [28]. Hence, it is expected that the WO 3 nanoparticles synthesized using oxalic acid will exhibit better catalytic dye-degradation efficiency compared to the others.…”

Section: Catalyst Characterizationmentioning

confidence: 99%

Effect of Chelating Agents on the Structural, Optical, and Dye-Degradation Properties of Tungsten Oxide Nanoparticles

Thangavel¹,

Senthil

Pachamuthu³

et al. 2022

Photonics

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A simple co-precipitation method was used to create pure tungsten oxide (WO3) nanoparticles using phthalic acid, citric acid, and oxalic acid as chelating agents. The influences of chelating agents on the structural, morphological, and optical properties were investigated. X-ray diffraction (XRD) patterns of WO3 nanoparticles showed the existence of combined phase of anorthic-monoclinic for all the samples, and the crystalline size was found to be reduced while using oxalic acid. The vibrational band observed in the region around (500–800 cm−1) in the FTIR spectra indicates the formation of WO3 nanoparticles. SEM images revealed the formation of WO3 agglomerates. The energy-dispersive X-ray (EDX) spectra of the WO3 nanoparticles confirmed the purity of synthesized nanoparticles. The enhanced light-absorption ability of oxalic-acid-assisted WO3 nanoparticles are inferred from the decreased band gap energy in UV–vis absorption spectra. The PL spectra showed emission in both the UV and visible regions. The optimized reaction parameters for obtaining high catalytic efficiency are identified by varying the concentrations of oxidant, catalyst, and dye during the catalytic reaction. The synthesized WO3 nanoparticles exhibited better catalytic degradation of CV than MB and RB dyes even with the lesser quantity of catalyst material.

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Section: Catalyst Characterizationmentioning

confidence: 99%