Iridium nanoparticles anchored WO3 nanocubes as an efficient photocatalyst for removal of refractory contaminants (crystal violet and methylene blue)

Dhanalakshmi, M.; Prabavathi, S. Lakshmi; Jones, B. Filip; Muthuraj, V.

doi:10.1016/j.cplett.2020.137285

Cited by 26 publications

(13 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The gentian violet degradation efficiency is close to zero showing that the gentian violet can not be degraded only using nanorods or UV light which is similar to that reported by other groups. [8,9] Gentian violet can only be photodegraded under the synergistic role of the barium tin hydroxide/tin dioxide nanorods and UV light. In addition, the photocatalytic performance of the synthesized barium tin hydroxide/tin dioxide nanorods was also compared with that of the individual entity viz barium hydroxide, barium tin hydroxide, and tin dioxide which is also shown in Figure 10b.…”

Section: Photocatalytic Performance Of the Barium Tin Hydroxide/tin D...mentioning

confidence: 99%

“…[6,7] Heterogeneous photocatalysis technology has attracted great research interest as an economical advance oxidation technology for the organic pollutant treatment in the wastewater because it is environmentally friendly, the light absorption ability, and photocatalytic activity can be enhanced by the combination of different semiconductor photocatalysts. [8,9] Nanocomposites belong to typical heterogeneous materials which consist of different nanoscale components and can improve the photocatalytic performance by controlling the recombination of the photogenerated electron-hole pairs.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A General Hydrothermal Growth and Photocatalytic Performance of Barium Tin Hydroxide/Tin Dioxide Nanorods

Tao

Huang

et al. 2021

Crystal Research and Technology

View full text Add to dashboard Cite

Barium tin hydroxide/tin dioxide nanorods are synthesized by a facile hydrothermal method. The morphology, structure and optical performance of the nanorods are characterized via X-ray diffraction, electron microscopy, X-ray photoelectron spectroscopy and solid ultraviolet-visible (UV-vis) diffuse reflectance spectrum. The nanorods are mainly composed of monoclinic BaSn(OH) 6 and orthorhombic SnO 2 phases with the length and diameter of about 5 µm and 50-150 nm, respectively. The formation process of the nanorods is investigated based on the morphology and structure evolution of the products from different hydrothermal conditions. Solid UV-vis diffuse reflectance spectrum shows that the nanorods belong to typical semiconductor with the band gap of 3.74 eV. The barium tin hydroxide/tin dioxide nanorods are used for the photocatalytic degradation of gentian violet under UV light irradiation. The degradation efficiency reaches 93.2% with the irradiation time of 8 h adding 10 mg nanorods in 10 mL 10 mg mL −1 gentian violet solution. The reactive species trapping results show that hydroxyl radicals, holes and superoxide radicals are main reactive species for gentian violet degradation. The barium tin hydroxide/tin dioxide nanorods are stable for the photocatalytic reaction of the gentian violet.

show abstract

Section: Photocatalytic Performance Of the Barium Tin Hydroxide/tin D...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A General Hydrothermal Growth and Photocatalytic Performance of Barium Tin Hydroxide/Tin Dioxide Nanorods

Tao

Huang

et al. 2021

Crystal Research and Technology

View full text Add to dashboard Cite

show abstract

“…They showed that the Ir/ZnO nano-composite degraded MB and CV more efficiently compared to pure ZnO. [22] A series of Ir/WO 3 nanocomposites by combining different percentages of WO 3 by the hydrothermal method was synthesized and characterized by different methods of XRD, XPS, TEM, SEM-EDX, UV-Vis and DRS while confirming its cubic structure. The photocatalytic activity of different percentages of nanocomposites for the removal of MB and CV.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Photo‐catalyst Ag₂S/WO₃ and its Application for Crystal Violet Degradation in the Aqueous Medium

Abdoli

Manesh

Ghaedi³

et al. 2022

ChemistrySelect

View full text Add to dashboard Cite

In this study, Ag 2 S/WO 3 Nano-composite was synthesized by hydrothermal method and identified by techniques including Fourier Transform Infrared Spectroscopy (FT-IR), Brunaure, Emmett and Teller (BET), Field Emission-Scanning Electron Microscopy (FE SEM), Energy Dispersive X-ray (EDX), X-Ray Diffraction (XRD), Ultraviolet-Visible spectroscopy (UV-Vis) and Diffuse Reflection Spectroscopy (DRS). This Nano-composite represents good efficiency to degrade the color of crystals violet (CV) in the aqueous medium owing to subsequent activation under visible light. The central composite design (CCD) was used to examine dependency of degradation to variables viz time, pH, amount of photo-catalyst, and CV concentration. The modeling results show the applicability of the quadratic model to predict and estimate the relationship between independent and dependent variables, while judgment were examined according to Correlation coefficients. The highest percentage of CV degradation was achieved under optimal conditions set as 45 minutes irradiation of 6 mg.L À 1 of VC at pH of 7 using 1.25 g of Ag 2 S/Wo 3 which lead to decompositions of around 98 % which has good agreement with the laboratory results (97.65 %). The regeneration of Ag 2 S/ WO 3 nano-composite reveals decreases in its applicability to conduct similar experiments and close results till 4 replicates. Also, the kinetic of analysis of the CV decomposition follows the quasi-first-order model.

show abstract

“…We have decided to exploit this strategy further by immobilization of Iridium metal on the surface of tryptophan (AA) grafted Fe 3 O 4 nanoparticles. We anticipate that tryptophan AA anchored on the surface of Fe 3 O 4 will enhance the stability of magnetic nanoparticles towards surface oxidation, and e ciently reduce the agglomeration of iridium nanoparticles (Dhanalakshmi et al 2020;Alaghmandfard and Madaah Hosseini 2021;Belachew et al 2021). The Iridium NPs as photocatalysts for various redox reactions is well known (Babajani and Jamshidi 2019;Dhanalakshmi et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Sustainable magnetically recoverable Iridium-coated Fe3O4 nanoparticles for enhanced catalytic reduction of organic pollutants in water

Diksha

Kaur

Yempally

et al. 2023

Environ Sci Pollut Res

View full text Add to dashboard Cite

In the present study, modi ed Fe 3 O 4 nanoparticles were fabricated by surface coating with tryptophan and Iridium by coprecipitation method to afford Fe 3 O 4 @trp@Ir magnetic nanoparticles. As-prepared Fe 3 O 4 @trp@Ir nanoparticles are environmentally benign e cient catalysts for reducing organic pollutants such as 4-nitrophenol (4-NP), 4-nitroaniline (4-NA), and 1-bromo-4-nitrobenzene (1-B-4-NB). The key parameters that affect the catalytic activity like temperature, catalyst loading, and the concentration of reducing agent NaBH 4 were optimized. The obtained results proved that Fe 3 O 4 @trp@Ir is an e cient catalyst for reducing nitroaromatics at ambient temperature with a minimal catalyst loading of 0.0025%. The complete conversion of 4-nitrophenol to 4-aminophenol took only 20 seconds with a minimal catalyst loading of 0.0025% and a rate constant of 0.0522 s − 1 . The high catalytic activity factor (1.040 s − 1 mg − 1 ) and high turnover frequency (9 min − 1 ) obtained for Fe 3 O 4 @trp@Ir nanocatalyst highlight the possible synergistic effect of the two metals (Fe and Ir). The visible-light photocatalytic degradation of 4-NP was also investigated in the presence of Fe 3 O 4 @trp@Ir. The photocatalytic degradation of 4-NP by Fe 3 O 4 @trp@Ir is completed in 20 min with 95.15% e ciency, and the rate of photodegradation of 4-NP (0.1507 min − 1 ) is about twice the degradation rate of 4-NP in the dark (0.0755 min − 1 ). The catalyst was recycled and reused for ve cycles without signi cant reduction in the conversion e ciency of the catalyst.

show abstract

Iridium nanoparticles anchored WO3 nanocubes as an efficient photocatalyst for removal of refractory contaminants (crystal violet and methylene blue)

Cited by 26 publications

References 38 publications

A General Hydrothermal Growth and Photocatalytic Performance of Barium Tin Hydroxide/Tin Dioxide Nanorods

A General Hydrothermal Growth and Photocatalytic Performance of Barium Tin Hydroxide/Tin Dioxide Nanorods

Synthesis and Characterization of Photo‐catalyst Ag₂S/WO₃ and its Application for Crystal Violet Degradation in the Aqueous Medium

Sustainable magnetically recoverable Iridium-coated Fe3O4 nanoparticles for enhanced catalytic reduction of organic pollutants in water

Contact Info

Product

Resources

About

Iridium nanoparticles anchored WO3 nanocubes as an efficient photocatalyst for removal of refractory contaminants (crystal violet and methylene blue)

Cited by 26 publications

References 38 publications

A General Hydrothermal Growth and Photocatalytic Performance of Barium Tin Hydroxide/Tin Dioxide Nanorods

A General Hydrothermal Growth and Photocatalytic Performance of Barium Tin Hydroxide/Tin Dioxide Nanorods

Synthesis and Characterization of Photo‐catalyst Ag2S/WO3 and its Application for Crystal Violet Degradation in the Aqueous Medium

Sustainable magnetically recoverable Iridium-coated Fe3O4 nanoparticles for enhanced catalytic reduction of organic pollutants in water

Contact Info

Product

Resources

About

Synthesis and Characterization of Photo‐catalyst Ag₂S/WO₃ and its Application for Crystal Violet Degradation in the Aqueous Medium