A composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization

“…The mechanism of photocatalytic degradation of RhB and P-CP of BiOI/NH 2 -MIL-125(Ti) was speculated based on the experimental results of the active species trapping test. The energy band structures can be calculated by the equations [31][32][33]:…”

Section: Proposed Mechanism For the Bioi/nh 2 -Mil-125(ti) Compositementioning

confidence: 99%

The Research on the Construction and the Photocatalytic Performance of BiOI/NH2-MIL-125(Ti) Composite

Zhang

Yang

et al. 2020

Catalysts

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The BiOI/NH2-MIL-125(Ti) composite photocatalyst with excellent photocatalytic performance was prepared by the solvothermal method. For the BiOI/NH2-MIL-125(Ti) (BNMT) system, the contents of NH2-MIL-125(Ti) in BNMT-4, BNMT-5, BNMT-7, BNMT-9, and BNMT-10 were 4 wt %, 5 wt %, 7 wt %, 9 wt %, and 10 wt %, respectively. XRD, XPS, SEM, and TEM characterizations indicated that BiOI/NH2-MIL-125(Ti) was successfully prepared. Brunauer, Emmett, and Teller (BET) and UV–vis diffuse reflectance spectra photoelectrochemical analysis indicated that BNMT-9 can make the specific surface area and photo absorption region larger than BiOI. In addition, the separation efficiency of photogenerated carriers was improved, and the recombination efficiency was reduced. The degradation percentages of Rhodamine B (RhB) and p-chlorophenol (P-CP) reached 99% and 90% over BNMT-9 under visible light irradiation. Additionally, the catalysts had high stability. The results of the active spices trapping experiments test indicated that h+ was the main active species. The possible degradation mechanism was proposed.

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“…Few layer black phosphorus (FLBP) was synthesized following methods reported in the literature [23]. The MIL-125(Ti) was fabricated according to an approach previously reported with slight adjustments [26]. The composites were prepared by varying the weight loadings of MIL-125(Ti) while keeping the amount of FLBP constant.…”

Section: Synthesis Of Bpmil Compositesmentioning

confidence: 99%

Photocatalytic Degradation of Diazinon with a 2D/3D Nanocomposite of Black Phosphorus/Metal Organic Framework

Hlophe

Dlamini

2021

Catalysts

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Metal–organic frameworks (MOFs) are promising materials for the removal and photodegradation of pesticides in water. Characteristics such as large surface area, crystalline structure and catalytic properties give MOFs an advantage over other traditional adsorbents. The application of MOFs in environmental remediation is hindered by their ability to only absorb in the UV region. Therefore, combining them with an excellent charge carrier 2D material such as black phosphorus (BP) provides an attractive composite for visible-light-driven degradation of pesticides. In the study, a nanocomposite of black phosphorus and MIL-125(Ti), defined as BpMIL, was prepared using a two-stage hydrothermal and sonication route. The as-prepared composite was characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), electrochemical impedance spectroscopy (EIS) and photoluminescence (PL) spectroscopy. These techniques revealed that the circular and sheet-like morphology of the nanocomposites had minimum charge recombination, allowing them to be effective photocatalysts. Furthermore, the photocatalysts exhibited extended productive utilization of the solar spectrum with inhibited recombination rate and could be applied in visible-light-driven water treatment. The photodegradation of diazinon in water was studied using a series of BpMIL (4%, 6% and 12% by mass) nanocomposites as a photocatalyst. The optimal composite was determined to be 4%BpMIL. The degradation parameters were optimized and these included photocatalyst dosage, initial diazinon concentration and pH of the solution. The optimal conditions for the removal and degradation of diazinon were: neutral pH, [diazinon] = 20 mg/L, photocatalyst dosage = 0.5 g/L, achieving 96% removal of the pesticide after 30 min with 4%BpMIL, while MIL-125(Ti) showed 40% removal. The improved photodegradation efficiency of the 4%BpMIL composite was attributed to Ti3+-Ti4+ intervalence electron transfer and the synergistic effect between MIL-125(Ti) and BP. The photodegradation followed pseudo-first-order kinetics with a rate constant of 1.6 × 10−2 min−1.

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A composite of platelet-like orientated BiVO4 fused with MIL-125(Ti): Synthesis and characterization

Cited by 42 publications

References 36 publications

Synthesis of a semi-conductor-like MOF with black phosphorous as a composite for visible light-driven photocatalysis

Synthesis of a semi-conductor-like MOF with black phosphorous as a composite for visible light-driven photocatalysis

The Research on the Construction and the Photocatalytic Performance of BiOI/NH2-MIL-125(Ti) Composite

Photocatalytic Degradation of Diazinon with a 2D/3D Nanocomposite of Black Phosphorus/Metal Organic Framework

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