Effect of actual working conditions on catalyst structure and activity for oxidation of volatile organic compounds: A review

Shen, Qiuyu; Lu, Zhihui; Bi, Fukun; Fang, Yuyin; Song, Lin-Ping; Yang, Yang; Wu, Minghong; Zhang, Xiaodong

doi:10.1016/j.fuel.2023.128012

Cited by 68 publications

(8 citation statements)

References 141 publications

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“…While taking NMR of UiO‐66‐NH 2 ‐IM/CO 3 2− , the peak at δ=7.60 ppm (H D ) and that for the lone imino proton disappear, suggesting the detection of CO 3 2− accompanies the abstraction of these two protons. As shown in Figure S11, DFT optimization leads to the formation of a cyclic ring type H‐bonding complex structure, implying these two protons are involved in detecting CO 3 [2–66] . In the time‐dependent photoluminescence study, the emission spectra of UiO‐66‐NH 2 ‐IM in aqueous CO 3 2− solution were recorded from 0 to 90 minutes.…”

Section: Resultsmentioning

confidence: 99%

“…[2] Because of their large surface area (> 6000 m 2 /g), high porosity (up to 90 % free volume), structural diversity, and highly tunable pore size, they have attracted tremendous attention from all quarters in recent years. [1,3,41,3,41,[3][4][5] These include gas storage/separation, [5] catalysis, [6][7][8][9] adsorption, [10] photocatalysis, [11] fluorescent recognition, [12] advanced oxidation, [13] chemical sensing, [14] drug delivery, [15] proton conduction, [16] and so on.…”

Section: Introductionmentioning

confidence: 99%

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Post‐Synthetic Modification of Zr‐based Metal‐Organic Frameworks with Imidazole: Variable Optical Behavior and Sensing

et al. 2023

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UiO‐66‐NH2‐IM, a fluorescent metal‐organic framework (MOF), was synthesized by post‐synthetic modification of UiO‐66‐NH2 with 2‐imidazole carboxaldehyde via a Schiff base reaction. It was examined using various characterization techniques (PXRD, FTIR, NMR, SEM, TGA, UV‐Vis DRS, and photoluminescence spectroscopy). The emissive feature of UiO‐66‐NH2‐IM was utilized to detect volatile organic compounds (VOCs), metal ions, and anions, such as acetone, Fe3+, and carbonate (CO32‐). Acetone turns off the high luminescence of UiO‐66‐NH2‐IM in DMSO, with the limit of detection (LOD) being 3.6 ppm. Similarly, Fe3+ in an aqueous medium is detected at LOD = 0.67 μM (0.04 ppm) via quenching. On the contrary, CO32‐ in an aqueous medium significantly enhances the luminescence of UiO‐66‐NH2‐IM, which is detected with extremely high sensitivity (LOD = 1.16 µM, i.e., 0.07 ppm). Large Stern‐Volmer constant, Ksv, and low LOD values indicate excellent sensitivity of the post‐synthetic MOF. Experiments supported by density functional theory (DFT) calculations discern photo‐induced electron transfer (PET), resonance energy transfer (RET), inner filter effect (IFE), or proton abstraction as putative sensing mechanisms. NMR and computational studies propose a proton abstraction mechanism for luminescence enhancement with CO32‐. Moreover, the optical behavior of the post‐synthetic material toward analytes is recyclable.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Post‐Synthetic Modification of Zr‐based Metal‐Organic Frameworks with Imidazole: Variable Optical Behavior and Sensing

et al. 2023

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“…Metal–organic frameworks (MOFs) have various applications such as gas storage, separation, and catalysis. − In the past time, various MOFs had been used to study iodine capture, , such as Cu-BTC, MIL-53 series (Al), MIL-101 (Al), MOF-74, JNU-200 (Co), Zr-MOFs, ZIF-8, and Cd-MOF . Further research was needed to explore MOFs with higher adsorption capacity, selectivity, stability, and low cost.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Radioactive Iodine Trapping Mechanism by Zinc-Based Metal–Organic Frameworks with Various N-Containing Carboxylate Ligands

et al. 2023

ACS Appl. Mater. Interfaces

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This study aimed to develop effective adsorbents for capturing radioactive iodine in nuclear power waste gas. Two zinc metal−organic frameworks (Zn-MOFs) were synthesized and found to have favorable properties such as a large surface area, thermal stability, surface rich in π-electron-containing nitrogen, and redox potential. Adsorption experiments revealed maximum capacities of 1.25 and 1.96 g g −1 for the MOFs at 75 °C, with the pseudo-second-order kinetic model fitting the data well. The Langmuir equation provided a better fit in cyclohexane, with maximum adsorption amounts of 249 and 358 mg g −1 for Zn-MOF-1 and Zn-MOF-2, respectively. The MOFs were also stable during six cycles of adsorption and desorption. Furthermore, electron transfer occurred due to the synergistic adsorption of Zn, N, and O atoms, resulting in the conversion of some iodine to polyiodide. Zn-MOF-2 exhibited better chemisorption than Zn-MOF-1 due to a smaller highest occupied molecular orbital (HOMO)−lowest unoccupied molecular orbital (LUMO) gap. Notably, it was discovered that N-containing radicals had stronger interactions with iodine compared to radicals without N. These findings provide valuable insights into MOF synthesis and environmental protection.

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“…13 MetalÀorganic frameworks (MOFs) have many advantages, such as large internal surface, high surface area, porous structures, low density, controllable pore size, modified pore surface, and chemical and thermal stability, which makes the new porous material widely useful in many fields including photocatalysis, catalysis, adsorption, separation, drug delivery, sensing, and as a template. [13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] MOFs as template provide an ideal environment for loading QDs and preventing them from aggregating. There are various methods for synthesizing QDs@MOFs, including ship-bottle, bottle-ship, photodeposition, and direct surface functionalization.…”

Section: Introductionmentioning

confidence: 99%

Embedding of copper(i) oxide quantum dots in MOF-801 for the photocatalytic degradation of acid yellow 23 under visible light

Ghasemzadeh

Akhbari

2023

New J. Chem.

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Effect of actual working conditions on catalyst structure and activity for oxidation of volatile organic compounds: A review

Cited by 68 publications

References 141 publications

Post‐Synthetic Modification of Zr‐based Metal‐Organic Frameworks with Imidazole: Variable Optical Behavior and Sensing

Post‐Synthetic Modification of Zr‐based Metal‐Organic Frameworks with Imidazole: Variable Optical Behavior and Sensing

Analysis of Radioactive Iodine Trapping Mechanism by Zinc-Based Metal–Organic Frameworks with Various N-Containing Carboxylate Ligands

Embedding of copper(i) oxide quantum dots in MOF-801 for the photocatalytic degradation of acid yellow 23 under visible light

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