Synthesis of morphology-controlled bismutite for selective applications

Selvamani, Thangavel; Raj, Balasubramaniam Gnana Sundara; Anandan, Sambandam; Wu, Jerry J.; Ashokkumar, Muthupandian

doi:10.1039/c5cp07523h

Cited by 35 publications

(19 citation statements)

References 86 publications

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“…The photoluminescence spectrum of PbTiO 3 contains all the emission peaks in the range of 451–550 nm and peak at 470 nm i. e. the strong emission which might be responsible for photo‐generated charge carriers on the surface ,…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic Degradation of Congo Red Using PbTiO₃ Nanorods Synthesized via a Sonochemical Approach

Bhagwat

Asiri³

et al. 2018

ChemistrySelect

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Lead titania (PbTiO 3 ) possessing nanorods morphology was synthesized through facile and straightforward sonochemical approach using titanium tetraisopropoxide and lead nitrate as a starting material followed by annealing at 700°C for 2 h and was utilized as an efficient photocatalyst to examine the degradation of Congo red dye (CR) under visible light. The assynthesized PbTiO 3 nanorods were characterized by physicalchemical methods such as phase identification, morphology, Chemical composition, and elemental analysis. To study the effect of PbTiO 3 nanorods on dye degradation, various experimental parameters such as photocatalyst dosage, pH, and initial dye concentration was optimized. About 92% dye was degraded at pH 6 in the existence of PbTiO 3 nanorods under visible light. To know the mineralization of Congo red in the presence of sonochemically synthesized PbTiO 3 nanorods, the total organic carbon (TOC) removal studies carried out and it shows about 46% Congo red can be totally abated in 150 min under visible light.

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Section: Resultsmentioning

confidence: 99%

Photocatalytic Degradation of Congo Red Using PbTiO₃ Nanorods Synthesized via a Sonochemical Approach

Bhagwat

Asiri³

et al. 2018

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“…59,60 Therefore, the anionic MO molecules can be effectively adsorbed by UV samples by the ligand exchange reaction with the surface-adsorbed OH − groups. 29…”

Section: Resultsmentioning

confidence: 99%

Bi₁₂O₁₇Cl₂/(BiO)₂CO₃ Nanocomposite Materials for Pollutant Adsorption and Degradation: Modulation of the Functional Properties by Composition Tailoring

Mian¹,

Bottaro²,

Rancan³

et al. 2017

ACS Omega

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Bi12O17Cl2/(BiO)2CO3 nanocomposite materials were studied as bifunctional systems for depuration of wastewater. They are able to efficiently adsorb and decompose rhodamine B (RhB) and methyl orange (MO), used as model pollutants. Bi12O17Cl2/(BiO)2CO3 nanocomposites were synthesized at room temperature and ambient pressure by means of controlled hydrolysis of BiCl3 in the presence of a surfactant (Brij 76). Cold treatments of the pristine samples with UV light or thermal annealing at different temperatures (370–500 °C) and atmospheres (air, Ar/30% O2) were adopted to modulate the relative amounts of Bi12O17Cl2/(BiO)2CO3 and hence the morphology, surface area, ζ-potential, optical absorption in the visible range, and the adsorption/degradation of pollutants. The best performance was achieved by (BiO)2CO3-rich samples, which adsorbed 80% of MO and decomposed the remaining 20% by visible light photocatalysis. Irrespective of the dye, all of the samples were able to almost complete the adsorption step within 10 min contact time. Bi12O17Cl2-rich composite materials displayed a lower adsorption ability, but thanks to the stronger absorption in the visible range they behaved as more effective photocatalysts. The obtained results evidenced the ability of the employed strategy to modulate sample properties in a wide range, thus pointing out the effectiveness of this approach for the synthesis of multifunctional inorganic materials for environmental remediation

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“…Further, the optical absorption band gap energies (E g ) for the materials were calculated by plotting the values of (αhν) n vs the photon energy (hν), using general Tauc equation and expressed as follows:

normalα = \frac{normalC {(hν - {normalE}_{normalg}^{bulk})}^{n}}{hν}

where α indicates the optical absorption coefficient, C is a constant value, hν is the photon energy, and E g bulk is the band gap of the material. Also, the value of n has a type of transition involved in the materials (n = 2 for a direct transition and n = ½ for an indirect transition). 41 …”

Section: Methodsmentioning

confidence: 99%

“…Also, the value of n has a type of transition involved in the materials (n = 2 for a direct transition and n = ½ for an indirect transition). 41…”

Section: Nano Materials Characterizationmentioning

confidence: 99%

Photocatalytic removal of organic pollutants and self‐cleaning performance of PES membrane incorporated sulfonated graphene oxide/ZnO nanocomposite

Boopathy

Arthanareeswaran

Ashok

2020

J of Chemical Tech & Biotech

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BACKGROUND: Membrane technology is highly applicable to water purification due to its simple operation process. During the treatment of organic wastewater, the organic compounds are deposited on the membrane surface, which leads to membrane fouling. To alleviate this problem, the membrane separation process could be combined with eco-friendly photocatalytic technology. In this regard, facile synthesized nanomaterials, such as sulfonated graphene oxide (SGO), zinc oxide (ZnO), and SGO/ZnO (SGZ) are incorporated in a polyethersulfone (PES) membrane matrix used for antifouling analysis and degradation of organic pollutants in the presence of UV light irradiation. RESULTS: X-ray diffraction (XRD) and Transmission Electron Microscopy (TEM) analysis shows that ZnO is bound strongly within the SGO-ZnO nanocomposite. The optical property was also altered for hybrid SGO-ZnO nanocomposite as compared to the ZnO photocatalyst. The physicochemical characterization of PES-SGO, PES-ZnO, and PES-SGZ nanocomposite membranes was studied. Hydrophilicity and water flux are improved with the addition of nanomaterials. Among the membranes, PES-SGZ nanocomposite membranes exhibit maximum water flux and lower contact angle value of 152 L m −2 h −1 and 51.9°, respectively. The photocatalytic activity of the membrane was assessed by organic pollutants under the UV light. The PES-SGZ nanocomposite membrane revealed higher photocatalytic efficiency for crystal violet at 92.3% and ciprofloxacin at 95.1%. CONCLUSION: The modified PES membranes enhanced antifouling and hydrophilic properties. Specifically, the PES-SGZ nanocomposite membrane proved to be a superior material for the effective photodegradation of organic pollutants and it achieved a higher water flux. To conclude, the prepared photocatalytic membrane could have vast potential in the treatment of toxic organic industrial effluents.

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Synthesis of morphology-controlled bismutite for selective applications

Cited by 35 publications

References 86 publications

Photocatalytic Degradation of Congo Red Using PbTiO₃ Nanorods Synthesized via a Sonochemical Approach

Photocatalytic Degradation of Congo Red Using PbTiO₃ Nanorods Synthesized via a Sonochemical Approach

Bi₁₂O₁₇Cl₂/(BiO)₂CO₃ Nanocomposite Materials for Pollutant Adsorption and Degradation: Modulation of the Functional Properties by Composition Tailoring

Photocatalytic removal of organic pollutants and self‐cleaning performance of PES membrane incorporated sulfonated graphene oxide/ZnO nanocomposite

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Synthesis of morphology-controlled bismutite for selective applications

Cited by 35 publications

References 86 publications

Photocatalytic Degradation of Congo Red Using PbTiO3 Nanorods Synthesized via a Sonochemical Approach

Photocatalytic Degradation of Congo Red Using PbTiO3 Nanorods Synthesized via a Sonochemical Approach

Bi12O17Cl2/(BiO)2CO3 Nanocomposite Materials for Pollutant Adsorption and Degradation: Modulation of the Functional Properties by Composition Tailoring

Photocatalytic removal of organic pollutants and self‐cleaning performance of PES membrane incorporated sulfonated graphene oxide/ZnO nanocomposite

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Photocatalytic Degradation of Congo Red Using PbTiO₃ Nanorods Synthesized via a Sonochemical Approach

Photocatalytic Degradation of Congo Red Using PbTiO₃ Nanorods Synthesized via a Sonochemical Approach

Bi₁₂O₁₇Cl₂/(BiO)₂CO₃ Nanocomposite Materials for Pollutant Adsorption and Degradation: Modulation of the Functional Properties by Composition Tailoring