Enhanced photocatalytic activity of TiO<sub>2</sub>/UiO-67 under visible-light for aflatoxin B1 degradation

Zhang, Jia; Wei, Zimin; Guo, Wenbo; Wu, Zengnan; Yin, Yilin; Li, Zenghe

doi:10.1039/d1ra09441f

Cited by 13 publications

(9 citation statements)

References 47 publications

(57 reference statements)

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“…Normally, the conduction band potential (E CB ) of the n-type semiconductor is approximately 0.2 eV lower than its E FB . 31,38 Thus, the E CB of ZnIn 2 S 4 is −1.3 eV. Combined with the aforementioned E g and E CB , the valence band (VB) potential is calculated to be 1.34 eV vs. NHE using the formula E VB = E CB + E g , which agrees with the valence band spectrum results, as illustrated in Fig.…”

Section: Optical and Electronic Propertiessupporting

confidence: 73%

Photoreforming of polyester plastics into added-value chemicals coupled with H₂ evolution over a Ni₂P/ZnIn₂S₄ catalyst

Liu

Shi

et al. 2023

Inorg. Chem. Front.

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Section: Optical and Electronic Propertiessupporting

confidence: 73%

Photoreforming of polyester plastics into added-value chemicals coupled with H₂ evolution over a Ni₂P/ZnIn₂S₄ catalyst

Liu

Shi

et al. 2023

Inorg. Chem. Front.

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“…The value of n depends on the type of electron excitation, with n = 4 indicating direct excitation and n = 1 indicating indirect excitation. For UiO-67 and MgFe 2 O 4 , the values of n were found to be 1 and 4, respectively, reflecting their direct and indirect electron excitation. , …”

Section: Resultsmentioning

confidence: 99%

“…52 respectively, reflecting their direct and indirect electron excitation. 53,54 The Kubelka−Munk equation was utilized to determine the band gap energy values of UiO-67, MgFe 2 O 4 , and MU-x composites. By plotting (αhν) 1/2 versus hν and identifying the intercept of the tangent line, the E g values were determined.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Optimization of Visible-Light-Driven Ciprofloxacin Degradation Using a Z-Scheme Semiconductor MgFe₂O₄/UiO-67

Nasari,

Taherimehr

2023

Langmuir

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A heterogeneous photocatalyst, MgFe 2 O 4 /UiO-67 (MU-x), was successfully synthesized by doping magnetic magnesium ferrite nanoparticles (MgFe 2 O 4 ) with the UiO-67 metal−organic framework at various weight ratios (MgFe 2 O 4 : UiO-67 at 30, 50, 70, and 90 wt %). Various techniques, including Xray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR) , Brunauer−Emmett−Teller (BET), photoluminescence (PL), vibrating sample magnetometry (VSM), electrochemical impedance spectroscopy (EIS), and ultraviolet−visible diffuse reflectance spectroscopy (UV−vis DRS), were used to characterize the prepared photocatalysts. The photocatalytic performance of MU-x in the degradation of ciprofloxacin (CIP) under visible light was assessed. The CIP degradation efficiency was found to increase as the amount of MgFe 2 O 4 in the composite was increased up to 70 wt %. Experimental conditions were optimized using response surface methodology (RSM) based on central composite design (CCD) with three factors: initial pH, catalyst loading, and CIP concentration. Using the obtained model, the optimal conditions were determined as follows: initial pH of 8.025, catalyst loading of 33.8 wt %, and CIP concentration of 10.8 mg/L. Under these optimal conditions, a notable improvement was achieved, with 99.62% of CIP removal achieved within 90 min, surpassing the performance of previously reported photocatalysts. Total organic carbon (TOC) analysis revealed a high degree of mineralization, at 81.25%. The degradation pathway of CIP was investigated based on liquid chromatography−mass spectrometry (LC-MS) analysis. Finally, the values of E CB and E VB of the photocatalyst were determined and the possible degradation mechanism of CIP was investigated based on Mott−Schottky and the applied scavengers. The hydroxyl radical ( • OH) was identified as the dominant species in the removal of CIP through a trapping experiment. The photocatalyst with 70 wt % of MgFe 2 O 4 (MU-70) exhibited excellent stability and recoverability with an external magnet, demonstrating 86.33% CIP removal after four cycles. According to the obtained results, MU-70 is a promising visible-light-active photocatalyst with great potential for water treatment applications and convenient recovery.

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“…Photocatalytic technology is a newly developed technology to degrade pollutants under mild or gentle conditions including AFB 1 [ 20 , 21 ]. In the photocatalytic process, When the light with appropriate energy irradiates the photocatalysts, the electrons (e − ) are excited from the valence band to the conduction band leaving behind holes (h + ) [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of AFB1 Removal Efficiency via Adsorption/Photocatalysis Synergy Using Surface-Modified Electrospun PCL-g-C3N4/CQDs Membranes

et al. 2023

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Aflatoxin B1 (AFB1) is a highly toxic mycotoxin produced by aspergillus species under specific conditions as secondary metabolites. In this study, types of PCL (Polycaprolactone) membranes anchored (or not) to g-C3N4/CQDs composites were prepared using electrospinning technology with (or without) the following surface modification treatment to remove AFB1. These membranes and g-C3N4/CQDs composites were characterized by SEM, TEM, UV-vis, XRD, XPS and FTIR to analyze their physical and chemical properties. Among them, the modified PCL-g-C3N4/CQDs electrospun membranes exhibited an excellent ability to degrade AFB1 via synergistic effects of adsorption and photocatalysis, and the degradation rate of 0.5 μg/mL AFB1 solution was observed to be up to 96.88% in 30 min under visible light irradiation. Moreover, the modified PCL-g-C3N4/CQDs electrospun membranes could be removed directly after the reaction process without centrifugal or magnetic separation, and the regeneration was a green approach synchronized with the reaction under visible light avoiding physical or chemical treatment. The mechanism of adsorption by electrostatic attraction and hydrogen bonding interaction was revealed and the mechanism of photodegradation of AFB1 was also proposed based on active species trapping experiments. This study illuminated the highly synergic adsorption and photocatalytic AFB1 removal efficiency without side effects from the modified PCL-g-C3N4/CQDs electrospun membranes, thereby offering a continual and green solution to AFB1 removal in practical application.

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Enhanced photocatalytic activity of TiO₂/UiO-67 under visible-light for aflatoxin B1 degradation

Abstract: Enhanced photocatalytic activity of TiO2/UiO-67 under visible-light for aflatoxin B1 degradation.

Cited by 13 publications

References 47 publications

Photoreforming of polyester plastics into added-value chemicals coupled with H₂ evolution over a Ni₂P/ZnIn₂S₄ catalyst

Photoreforming of polyester plastics into added-value chemicals coupled with H₂ evolution over a Ni₂P/ZnIn₂S₄ catalyst

Optimization of Visible-Light-Driven Ciprofloxacin Degradation Using a Z-Scheme Semiconductor MgFe₂O₄/UiO-67

Enhancement of AFB1 Removal Efficiency via Adsorption/Photocatalysis Synergy Using Surface-Modified Electrospun PCL-g-C3N4/CQDs Membranes

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Enhanced photocatalytic activity of TiO2/UiO-67 under visible-light for aflatoxin B1 degradation

Abstract: Enhanced photocatalytic activity of TiO2/UiO-67 under visible-light for aflatoxin B1 degradation.

Cited by 13 publications

References 47 publications

Photoreforming of polyester plastics into added-value chemicals coupled with H2 evolution over a Ni2P/ZnIn2S4 catalyst

Photoreforming of polyester plastics into added-value chemicals coupled with H2 evolution over a Ni2P/ZnIn2S4 catalyst

Optimization of Visible-Light-Driven Ciprofloxacin Degradation Using a Z-Scheme Semiconductor MgFe2O4/UiO-67

Enhancement of AFB1 Removal Efficiency via Adsorption/Photocatalysis Synergy Using Surface-Modified Electrospun PCL-g-C3N4/CQDs Membranes

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Enhanced photocatalytic activity of TiO₂/UiO-67 under visible-light for aflatoxin B1 degradation

Photoreforming of polyester plastics into added-value chemicals coupled with H₂ evolution over a Ni₂P/ZnIn₂S₄ catalyst

Photoreforming of polyester plastics into added-value chemicals coupled with H₂ evolution over a Ni₂P/ZnIn₂S₄ catalyst

Optimization of Visible-Light-Driven Ciprofloxacin Degradation Using a Z-Scheme Semiconductor MgFe₂O₄/UiO-67