Novel CoWO4-Ag2MoO4 NCs: Synthesis, enhanced photocatalytic activity under visible-light irradiation and its antimicrobial activity

Balasurya, S.; Al‐Farraj, Saleh A.; Raju, Lija L.; Chinnathambi, Arunachalam; Alharbi, Sulaiman Ali; Thomas, Ajith M.; Khan, S. Sudheer

doi:10.1016/j.surfin.2021.101237

Cited by 19 publications

(9 citation statements)

References 71 publications

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“…These oxygen free radicals in combination with water vapor result in hydroxide free radicals. These hydroxide free radicals are responsible for the photocatalytic activity of NCs [52–54] . The proposed mechanism of the photocatalytic activity of NCs is illustrated in Figure 10 and the sequential steps are:

true NCZ / PANI NCs + h ν \to normale^{-} (CB) + normalh^{+} (VB)

true normale^{-} (CB) + Oxygen \to normalO_{2}^{•}

true normalO_{2}^{•} + normalH_{2} normalO \to HO_{2}^{•} + HO^{-}

true HO_{2}^{•} + Water \to OH^{•} + normalH_{2} normalO_{2}

true normalH_{2} normalO_{2} \to 2 OH^{•}

true Water + normalh^{+} \to OH^{•}

true OH^{•}

…”

Section: Resultsmentioning

confidence: 99%

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Polyaniline Plastic Nanocomposite as Multi‐Functional Nanomaterial

Yadav

Kumar

2022

ChemistrySelect

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Mixed metal nanocomposites encapsulated with conducting polymer plastic may show synergistic effects in their properties resulting in unique applications in optoelectronic, conducting material, recording tapes, data‐storing quantum dots, catalysis, sensors, adsorption, purification, seperation, biosensors, antibacterial, and anti‐corrosive agents. Encapsulation of Ni/Cu/ZnO (NCZ) nanocomposites (NCs) with polyaniline (PANI) plastic by in situ method results in unique properties. A modified sol‐gel method was used for synthesizing mixed metal NCs. The PANI was synthesized by the chemical‐oxidative method. TEM, FTIR, FESEM, UV‐visible, and XRD techniques were used for characterizing NCZ NCs, PANI, and NCZ/PANI NCs. The theoretical (computational) study was carried out to support the experimental results. The adsorption, magnetic, photocatalytic, photoluminescence, electrical, antibacterial, and anticorrosive properties of NCs were explored. The NCZ/PANI NCs were proved paramagnetic. The optical band gap of NCs observed from UV‐visible and computational techniques were comparable i. e., ∼2.32 eV. The NCs show 86.5 % corrosion inhibition efficiency for mild steel in acidic medium. The adsorption power of the Silica gel/NCs column was greater than the pure silica gel column. The NCs degrade methyl‐red dye in UV light. The antibacterial activity was investigated against E. coli (‐) and bacillus (+). No significant antibacterial activity was observed. The synthesized NCZ/PANI NCs were proved to be very good nanomaterials for adsorption, separation, magnetic, photocatalytic, electrical, and corrosion inhibitor.

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true NCZ / PANI NCs + h ν \to normale^{-} (CB) + normalh^{+} (VB)

true normale^{-} (CB) + Oxygen \to normalO_{2}^{•}

true normalO_{2}^{•} + normalH_{2} normalO \to HO_{2}^{•} + HO^{-}

true HO_{2}^{•} + Water \to OH^{•} + normalH_{2} normalO_{2}

true normalH_{2} normalO_{2} \to 2 OH^{•}

true Water + normalh^{+} \to OH^{•}

true OH^{•}

…”

Section: Resultsmentioning

confidence: 99%

“…These hydroxide free radicals are responsible for the photocatalytic activity of NCs. [52][53][54] The proposed mechanism of the photocatalytic activity of NCs is illustrated in Figure 10 and the sequential steps are: ChemistrySelect…”

Section: Mechanism Of Photocatalytic Property Of Ncz/pani Ncs Against...mentioning

confidence: 99%

Polyaniline Plastic Nanocomposite as Multi‐Functional Nanomaterial

Yadav

Kumar

2022

ChemistrySelect

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“…Various photocatalysts were synthesized for degradation of common pollutant, and a comparative table of their photocatalytic degradation effect can be found in the Supporting Information (Table S1). − RhB is widely applied in textile dyeing, but it is a carcinogenic organic material and recalcitrant to biodegradation because of its complex structure. − Therefore, it is urgent to develop green and simple photocatalysts to degrade this pollutant.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Binary Type II α-Bi₂O₃/Bi₁₂TiO₂₀ Cross-Shaped Heterojunction with Enhanced Visible Light Photocatalytic Performance

Wang

Yan

Sun

et al. 2022

ACS Appl. Electron. Mater.

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The binary type II α-Bi 2 O 3 /Bi 12 TiO 20 heterojunction composite was successfully obtained by a simple hydrothermal process. The pH value and the Bi/Ti molar ratio were the key to form the α-Bi 2 O 3 /Bi 12 TiO 20 heterojunction. The α-Bi 2 O 3 nanobelts intertwined with the Bi 12 TiO 20 nanobelts to form a cross-shaped structure in the composite. The obvious red-shift can be detected in Raman spectra. UV−vis DRS also revealed that the effectively reduced band gap of the heterojunction composite led to sunlight absorption in a larger range. Meanwhile, the photocurrent responses and the EIS demonstrated that the combination of Bi 12 TiO 20 and α-Bi 2 O 3 significantly promoted the separation of photogenerated electron−hole pairs and suppressed their recombination, which was also confirmed by PL analysis. Furthermore, photocatalytic degradation experiments proved that the α-Bi 2 O 3 / Bi 12 TiO 20 heterojunction composite had excellent catalytic performance under visible light, whose rate constant value (k) was about 2.0 times that of pure α-Bi 2 O 3 and 4.5 times that of pure Bi 12 TiO 20 samples. A possible photocatalytic mechanism of α-Bi 2 O 3 /Bi 12 TiO 20 was also proposed based on p−p and type II heterojunction. It was concluded that the heterojunction structure markedly promoted the migration and separation of carriers to enhance its photoactivity.

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“…27 Indeed, p-n heterostructure CoWO 4 -based photocatalysts with direct contact between p-type and n-type semiconductors have been extensively studied, in which the difference in Fermi energy between the two semiconductors results in the generation of an internal electric field to promote the transfer and separation of charge carriers. 16,17,19 It is expected that the coupling of p-type CoWO 4 with n-type Ag 3 VO 4 to construct a p-n heterostructure for enhancing the photocatalytic performance is an efficient strategy.…”

Section: Introductionmentioning

confidence: 99%

“…17 In order to tackle this issue, combining another semiconductor with a matching band gap to construct a semiconductor heterojunction is an effective approach. 18 Up to now, various semiconductors including g-C 3 N 4 , 17 AgMoO 4 , 19 CdS (ref. 20) and Bi 2 WO 6 (ref.…”

Section: Introductionmentioning

confidence: 99%

Insight into the enhanced photocatalytic activity mechanism of the Ag₃VO₄/CoWO₄p–n heterostructure under visible light

et al. 2022

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Novel CoWO4-Ag2MoO4 NCs: Synthesis, enhanced photocatalytic activity under visible-light irradiation and its antimicrobial activity

Cited by 19 publications

References 71 publications

Polyaniline Plastic Nanocomposite as Multi‐Functional Nanomaterial

Polyaniline Plastic Nanocomposite as Multi‐Functional Nanomaterial

Preparation of Binary Type II α-Bi₂O₃/Bi₁₂TiO₂₀ Cross-Shaped Heterojunction with Enhanced Visible Light Photocatalytic Performance

Insight into the enhanced photocatalytic activity mechanism of the Ag₃VO₄/CoWO₄p–n heterostructure under visible light

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Novel CoWO4-Ag2MoO4 NCs: Synthesis, enhanced photocatalytic activity under visible-light irradiation and its antimicrobial activity

Cited by 19 publications

References 71 publications

Polyaniline Plastic Nanocomposite as Multi‐Functional Nanomaterial

Polyaniline Plastic Nanocomposite as Multi‐Functional Nanomaterial

Preparation of Binary Type II α-Bi2O3/Bi12TiO20 Cross-Shaped Heterojunction with Enhanced Visible Light Photocatalytic Performance

Insight into the enhanced photocatalytic activity mechanism of the Ag3VO4/CoWO4p–n heterostructure under visible light

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Preparation of Binary Type II α-Bi₂O₃/Bi₁₂TiO₂₀ Cross-Shaped Heterojunction with Enhanced Visible Light Photocatalytic Performance

Insight into the enhanced photocatalytic activity mechanism of the Ag₃VO₄/CoWO₄p–n heterostructure under visible light