Effect of calcination time of a quadruple-element doped titania nanoparticles in the photodegradation of gaseous formaldehyde under blue light irradiation

Laciste, Maricris T.; Luna, Mark Daniel G. de; Tolosa, Nolan C.; Lu, Ming‐Chun

doi:10.1016/j.chemosphere.2019.125763

Cited by 18 publications

(7 citation statements)

References 37 publications

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“…In order to study the adsorption process of MO by adsorbent, the adsorption data were fitted to quasi-primary and quasi-secondary kinetics, respectively. The equations for the pseudo-first-order kinetic and the pseudo-second-order kinetic and the expressions for the intra-particle diffusion (Weber–Morris) model are shown in Equations (2)–(4), respectively [ 36 , 37 , 38 ].

where q e and q t are the adsorption amounts (mg g −1 ) at the adsorption equilibrium and at time t , t is the adsorption time (min), I is the parameter and k 1 (min −1 ), k 2 (g mg −1 min −1 ) and k p (mg g −1 min −0.5 ) are the rate constants for the above model, respectively.…”

Section: Methodsmentioning

confidence: 99%

Nanofused Hierarchically Porous MIL-101(Cr) for Enhanced Methyl Orange Removal and Improved Catalytic Activity

et al. 2022

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Hierarchically porous MIL-101(Cr) (H-MIL-101(Cr)) with meso/macro-pores was directly prepared via nanofusion progress by using butyric acid as a modulating agent. In the methyl orange (MO) adsorption experiments, H-MIL-101(Cr) showed a high adsorption capability of 369.8 mg g−1, which was 1.52-fold greater than that of pristine MIL-101(Cr) (P-MIL-101(Cr)). While in the oxidation reaction of indene and 1-dodecene tests, H-MIL-101(Cr) presented much higher catalytic efficiency, with turnover frequency (TOF) values of 0.7242 mmol g−1 min−1 and 0.1492 mmol g−1 min−1, respectively, which were 28% and 34% greater than that in the case of P-MIL-101(Cr). Thus, compared with P-MIL-101(Cr), H-MIL-101(Cr) exhibited better removal efficiency and higher levels of activity in the oxidation reactions of indene and 1-dodecene. The unique structure of H-MIL-101(Cr) also contributed to its superior performance in these processes.

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Section: Methodsmentioning

confidence: 99%

Nanofused Hierarchically Porous MIL-101(Cr) for Enhanced Methyl Orange Removal and Improved Catalytic Activity

et al. 2022

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“…To investigate the process of dye adsorption by the adsorbent, pseudo-first-order and pseudo-second-order kinetic models were adopted to fit the adsorption data [46,47], respectively. The linear expressions of the pseudo-first-order kinetic equation and the pseudo-second-order kinetic equation were shown in Equations ( 2) and (3) [48,49] ln(q e − q t ) = ln q e − k 1 t…”

Section: Adsorption Kinetic Modelmentioning

confidence: 99%

Low-Temperature and Additive-Free Synthesis of Spherical MIL-101(Cr) with Enhanced Dye Adsorption Performance

et al. 2022

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The chromium-benzenedicarboxylate metal–organic framework (MOF), MIL-101(Cr), is one of the most well-investigated and widely used prototypical MOFs. Regarding its synthesis, the use of a toxic modulator (usually HF) and high reaction temperature (220 °C) are the main factors hindering its further expansion of production and utilization. In fact, high quality MIL-101(Cr) crystals can be prepared at a much lower temperature (160 °C) with spherical morphology via an additive-free approach. Compared to traditional octahedral MIL-101(Cr), the spherical MIL-101(Cr) possesses higher adsorption performance toward dye molecules, including methyl orange (MO) and rhodamine B (RB). The results suggest that toxic additives and high reaction temperatures are not essential in the synthesis of MIL-101(Cr), and the fabrication of spherical MIL-101(Cr) may offer a facile and effective pathway for the large-scale industrial application of MIL-101(Cr).

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“…The pseudo-second-order kinetic model considers the chemisorption process between the adsorbent and the adsorbate [53,54]. It assumes that the chemisorption mechanism controls the adsorption rate and that there are two binding sites on the adsorbent surface.…”

Section: Kinetic Study Of Adsorption (1) Pseudo-first-order Kinetic M...mentioning

confidence: 99%

“…It assumes that the chemisorption mechanism controls the adsorption rate and that there are two binding sites on the adsorbent surface. The linear expressions of the pseudo-second-order kinetic model are shown in Equation ( 3) [53].…”

Section: Kinetic Study Of Adsorption (1) Pseudo-first-order Kinetic M...mentioning

confidence: 99%

Template Method for Synthesizing Hierarchically Porous MIL-101(Cr) for Efficient Removal of Large Molecular Dye

et al. 2022

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As one of the most important prototypical chromium-based MOFs, MIL-101(Cr) is well-studied and widely employed in various scientific fields. However, due to its small capture window sizes and curved internal apertures, its application in large molecular removal is quite limited, and given its high stability and high synthetic temperature (> 200 °C), it is difficult to achieve hierarchically porous MIL-101(Cr). In our study, hierarchically porous MIL-101(Cr) involving a high macro-/meso-/micropores ratio was designed and synthesized using acetic acid as an additive and silicon dioxide (SiO2) nanoparticles as a template. The optimal hierarchically porous MIL-101(Cr) (A-4) possessed a high specific surface area (2693 m2·g−1) and an abundant macro-/mesoporous structure with the addition of SiO2 of 200 mg. Compared with the control sample (A-0) with a less macro-/mesoporous structure, A-4 showed good adsorption properties for both coomassie brilliant blue R-250 (CBB, 82.1 mg g-1) and methylene blue (MB, 34.3 mg g-1) dyes, which were 1.36 times and 9.37 times higher than those of A-0. Moreover, A-4 also had good recyclability, and the removal rate of CBB was still higher than 85% after five cycles of adsorption.

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Effect of calcination time of a quadruple-element doped titania nanoparticles in the photodegradation of gaseous formaldehyde under blue light irradiation

Cited by 18 publications

References 37 publications

Nanofused Hierarchically Porous MIL-101(Cr) for Enhanced Methyl Orange Removal and Improved Catalytic Activity

Nanofused Hierarchically Porous MIL-101(Cr) for Enhanced Methyl Orange Removal and Improved Catalytic Activity

Low-Temperature and Additive-Free Synthesis of Spherical MIL-101(Cr) with Enhanced Dye Adsorption Performance

Template Method for Synthesizing Hierarchically Porous MIL-101(Cr) for Efficient Removal of Large Molecular Dye

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