The sensitive detection of formaldehyde in aqueous media using zirconium-based metal organic frameworks

Vellingiri, Kowsalya; Deep, Akash; Kim, Ki‐Hyun; Boukhvalov, Danil W.; Kumar, Pawan; Qu, Yanbin

doi:10.1016/j.snb.2016.11.017

Cited by 98 publications

(72 citation statements)

References 65 publications

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“…It can be concluded that, besides the micropores, there was some wider micropores in the material. A similar observation on UiO‐66‐NH 2 samples has been reported in numerous publications, indicating the presence of the microporous structure. However, it has been shown in the work that the isotherms of UiO‐66‐NH 2 displayed a typical type IV curve.…”

Section: Resultssupporting

confidence: 89%

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Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights

Thuy¹,

Lộc

Tri³

et al. 2019

Int J of Chemical Kinetics

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The thin film photocatalysts were prepared from solvothermal UiO‐66‐NH2 and sol‐gel perovskite LaFeO3 by a dip‐coating technique. The properties of obtained catalysts were investigated by the methods of Brunauer‐Emmett‐Teller adsorption, XRD, SEM, FT‐IR, TGA, and UV‐vis spectroscopies. The results proved that the thin film of the thickness of 4.2 and 4.7 µm was successfully prepared from micro‐mesoporous UiO‐66‐NH2 and LaFeO3 nanocrystals. Possessing small crystals (9‐35 nm) and the band gap energy of 2.83 and 1.92 eV, respectively, UiO‐66‐NH2 and LaFeO3 are shown to be a highly active visible‐light photocatalyst for photodegradation of p‐xylene‐contained gas. The kinetics of photocatalytic degradation of p‐xylene under combined illumination of ultraviolet and visible lights over obtained UiO‐66‐NH2 and LaFeO3 thin films were carried out in a gradientless flow circulating system at room temperature and atmospheric pressure. The results showed that the Langmuir‐Hinshelwood kinetic model was successfully applied to correlate the obtained data. The kinetics of the reaction on both catalysts were found to be written by the fractional equation, describing the dependence of the reaction rate on the concentration of p‐xylene, oxygen molecules, dissociative adsorbed water vapor, the photon flux, and the inhibition of CO2 product. It implies that the reaction occurred at high surface coverages, molecular p‐xylene, and oxygen participated in the reaction in the form of surface molecular; water—in the forms of •OH and H+. Although there is a general kinetic equation for reaction on various catalysts, the different affinities of the catalysts with the compounds present in the reaction create the kinetic feature of the reaction on each catalyst. Because of the high affinity of catalysts with water vapor, the given reactant increased the rate of p‐xylene photocatalytic degradation at low concentration but inhibited it in the high concentration region. The adsorption affinity of LaFeO3 to oxygen is higher compared to UiO‐66‐NH2; then, there was an optimum concentration of oxygen in the photodegradation of p‐xylene on the former, whereas in the latter monotonically increasing relationship was found.

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Section: Resultssupporting

confidence: 89%

“…. The BET surface area of synthesized UiO‐66‐NH 2 is comparable with that was reported by Yang et al as 671 m 2 ⋅g −1 , but is approximately two times lower than the value reported by Vellingiri et al (1250 m 2 ⋅g −1 ).…”

Section: Resultssupporting

confidence: 85%

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights

Thuy¹,

Lộc

Tri³

et al. 2019

Int J of Chemical Kinetics

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“…Notably, similar luminescence sensors for formaldehyde have been previously reported. As shown in Table , comparing the detection limit with results from the literature, the complexes 3 and 6 in this work exhibit lower detection limits (1.0 × 10 −3 and 1.1 × 10 −3 , respectively) than those of previously reported, suggesting that the prepared salen‐type lanthanide coordination polymers could be applied to be a convenient and highly sensitive detection of formaldehyde. It is worth noting that luminescent properties of coordination polymers (CPs) are very sensitive to pH, because the different concentration of acids or bases buffered solution may react with metal ions to ruin the CPs framework, or the CPs may be directly dissolved in the buffered solution, which in turns affects the formaldehyde sensitive detection .…”

Section: Resultssupporting

confidence: 54%

Structures and luminescent sensors of mixed‐counterions based salen‐type lanthanide coordination polymers

Wang

Zou

et al. 2018

Luminescence

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Reactions of N,N'-bis (salicylidene)-1,2-cyclohexanediamine (H L) with mixed lanthanide counterions of LnCl ·6H O and Ln (NO ) ·6H O afford six H L lanthanide coordination polymers, e.g. {[Pr(H L) (NO ) Cl]·2CH Cl } (1); {[Ln(H L) (NO ) ] ·5CHCl ·mCH OH} [Ln = Sm (2), Eu (3), Gd (4), Tb (5) and Yb (6); m = 1 (2-5); m = 0 (6)]. X-ray crystallographic analysis reveals that complex 1 exhibits three-dimensional diamondoid topologic structure and complexes 2-6 are of two-dimensional structure. Luminescent spectra show that complexes 1 and 6 have characteristic near-infrared (NIR) emission of praseodymium (III) and ytterbium (III) ions and complexes 2-5 emit luminescence in the visible region. Complexes 3 and 6 reveal sensitive luminescence responses to formaldehyde.

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“…The symmetric and asymmetric stretching vibrations of the carboxylate groups were observed at 1554, 1447, and 1367 cm −1 . UiO-66(NH 2 ) showed characteristic bands at 1257 and 1383 cm −1 , representing C-N stretching 29 . IR peaks at 765 and 660 cm −1 were attributed to N-H vibrations.…”

Section: Resultsmentioning

confidence: 99%

“…Also, MOF-199 is a rare example of MOFs that has been developed at an industrial scale 31 . The amine derivate of UiO-66 (i.e., UiO-66(NH 2 )) was chosen based on its previous use for FA sensing 29 . As in the previous analysis using an MOF-5 based system, the analyses using Cu- and Zr-based MOFs were carried out with L-WSs of both FA alone and a mixture of carbonyls including FA.…”

Section: Resultsmentioning

confidence: 99%

Metal-organic framework and Tenax-TA as optimal sorbent mixture for concurrent GC-MS analysis of C1 to C5 carbonyl compounds

Dutta

Kim

Brown

et al. 2018

Sci Rep

Self Cite

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We report a multi adsorbent-based method using combinations of metal-organic frameworks (MOFs) and a commercial sorbent Tenax-TA for sampling and thermal desorption (TD) gas chromatography-mass spectrometry (GC-MS) quantification of mixtures of six (C1 to C5) aldehydes. The feasibility of this approach was demonstrated along with the optical analytical conditions for maximum recovery. Optimal TD conditions for adsorption and desorption of aldehydes using MOF-5 (Zn-based MOF)+ Tenax-TA were determined as −25 °C and 150 °C, respectively (purge volume: 100 ml). These conditions yielded good linearity (R2 = 0.997), precision, and high sensitivity. Analysis of the aldehyde mixtures yielded slightly smaller R2 values than the analysis of single species. Additionally, the performance of MOF-5+ Tenax-TA was compared with other combinations comprising of Cu-based MOF-199 and Zr-based MOF of UiO-66 topology. The results of the theoretical modelling analyses propose simultaneous interaction of the C=O group of aldehydes with open metal sites of the studied MOFs and van der Waals interaction of hydrocarbon “tail” of aldehydes with linkers of MOFs. The combined interactions significantly increased the enthalpy (eV/molecule) of formaldehyde adsorption on MOF. Our findings unravel a potential way to extend the application of GC-based detection toward concurrent analysis of organic molecules of variable sizes.

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The sensitive detection of formaldehyde in aqueous media using zirconium-based metal organic frameworks

Cited by 98 publications

References 65 publications

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights

Structures and luminescent sensors of mixed‐counterions based salen‐type lanthanide coordination polymers

Metal-organic framework and Tenax-TA as optimal sorbent mixture for concurrent GC-MS analysis of C1 to C5 carbonyl compounds

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The sensitive detection of formaldehyde in aqueous media using zirconium-based metal organic frameworks

Cited by 98 publications

References 65 publications

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH2 and LaFeO3 thin films under combined illumination of ultraviolet and visible lights

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH2 and LaFeO3 thin films under combined illumination of ultraviolet and visible lights

Structures and luminescent sensors of mixed‐counterions based salen‐type lanthanide coordination polymers

Metal-organic framework and Tenax-TA as optimal sorbent mixture for concurrent GC-MS analysis of C1 to C5 carbonyl compounds

Contact Info

Product

Resources

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Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights

Kinetics of photocatalytic degradation of gaseous p‐xylene on UiO‐66‐NH₂ and LaFeO₃ thin films under combined illumination of ultraviolet and visible lights