Aluminum/Tin-doped UiO-66 as Lewis acid catalysts for enhanced glucose isomerization to fructose

Li, Yulin; Meng, Xiangyunxiu; Luo, Ruiwen; Zhou, Haonan; Lu, Shuyan; Yu, Shuning; Bai, Peng; Guo, Xianghai; Lyu, Jiafei

doi:10.1016/j.apcata.2022.118501

Cited by 16 publications

(29 citation statements)

References 40 publications

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“…Similarly, glucose to HMF conversion has also been achieved using several Bronsted acid induced Zr MOF catalysts following the dehydration pathway under specific reaction conditions [60,77] . Among the Zr‐MOF catalysts, the 12 connected Zr 6 O 8 nodes containing UIO‐66 has been widely investigated in glucose to fructose conversion because UIO‐66 is known as a potential Lewis acid catalyst [38,57,59,60] . On the contrary, the other Zr 6 O 8 nodes containing Zr‐MOF, such as SO 3 H‐UIO‐66 and NH 2 ‐UIO‐66, exhibited good glucose conversion but were not suitable for the fructose formation due to the presence of Bronsted acidity (in SO 3 H‐UIO‐66) and Lewis basicity (in NH 2 ‐UIO‐66) in their framework [60,77,78] .…”

Section: Resultsmentioning

confidence: 99%

“…Hence, in this study the UIO‐66 MOF was selected to incorporate Nb to improve the activity of UIO‐66 for glucose to fructose transformation. In the literature, several other modifications in the UIO‐66 framework have been carried out to improve the glucose isomerization reaction by modulating the Lewis acid sites in the Zr‐framework of the MOF [38,57,59,60,77] . Glucose isomerization involves the transference of hydrogen from C2 to C1 and from O2 to O1 of the glucose structure (Scheme 2).…”

Section: Resultsmentioning

confidence: 99%

“…A similar observation has been provided in several published articles where the fructose yield has been shown to improve with long alkyl chain alcohols, such as 1‐propanol. [37–38,57,59] . The isomerization reaction of glucose to fructose is a reversible reaction and slightly endothermic in nature (ΔH=3 kJ/mol) [81] .…”

Section: Resultsmentioning

confidence: 99%

“…Niobium‐based catalysts have been proven to be one of the competent catalysts in the glucose isomerization reaction in the literature due to the Lewis acidic nature of tetrahedrally coordinated Nb(V) [55‐56] . MOF‐based heterogeneous catalysts have been extensively studied in the glucose isomerization reaction [26,38,57‐60] . The metal‐oxo cluster in the MOF framework provides the optimum Lewis acidity for the glucose isomerization reaction [57,59] .…”

Section: Introductionmentioning

confidence: 99%

“…Thus, several Zr‐based MOFs with Lewis acidic Zr sites and the hydrophobic framework have been explored for this reaction. Several modifications in the Zr framework of UIO‐66 have been reported with modulated acid sites to improve the fructose yield [38,57,59,60] . Defect‐rich UIO‐66 using different acid modulators has been highly active in the glucose to fructose isomerization reaction under the specified reaction condition.…”

Section: Introductionmentioning

confidence: 99%

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Improving the Glucose to Fructose Isomerization via Epitaxial‐Grafting of Niobium in UIO‐66 Framework

Kar

Srivastava

2022

ChemCatChem

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Glucose to fructose transformation is an essential transformation for the success of biorefinery. Herein, the epitaxial-grafting of Nb in UIO-66 significantly improved the fructose yield. Postsynthesis incorporating Nb in the UIO-66 phenomenally improved the glucose conversion from 31.1 % to 71.8 % and fructose selectivity from 38.2 % to 71.2 %. The incorporation of Nb was confirmed from the FTIR, HR-TEM investigation, EDX analysis, and elemental mapping. The XPS analysis distinctly stated the successful incorporation of Nb and generation of ZrÀ OÀ Nb oxo clusters in the UIO-66 framework. The NH 3 -TPD provided distinguishable information about the chemical interaction of Nb with the UIO-66 framework that resulted in the increase of the acid strength after the Nb incorporation in the UIO-66 catalyst. The content of Nb and reaction parameters, especially temperature and duration, control the glucose to fructose isomerization over glucose to mannose epimerization. The structure-activity relationship was established, and a reaction mechanism was proposed. The catalyst was recycled five times with only a lower decrease in the fructose yield (47.3 % to 42.2 %) than several reported MOFs catalysts. The activity of the developed catalyst was higher or similar to the reported catalysts. The successful grafting of Nb demonstrates that by swiftly modifying the acidity of the catalyst, a superior activity can be achieved.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Improving the Glucose to Fructose Isomerization via Epitaxial‐Grafting of Niobium in UIO‐66 Framework

Kar

Srivastava

2022

ChemCatChem

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Enhanced Catalytic Activity of Modified ZSM‐5 Towards Glucose Isomerization to Fructose

2023

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The present study focuses on generating mesopores within HÀ ZSM-5 (HÀ Z) zeolite via desilication and dealumination to incorporate Lewis acidic metal, such as Sn, into the framework (Sn 4 ZS 180 A 15 ) to catalyse glucose isomerisation. Sn 4 ZS 180 A 15 possesses enhanced surface area (457 m 2 g À 1 ), mesopore volume (0.585 cm 3 g À 1 ) and a high weak-medium to strong acidic sites ratio, compared to parent HÀ Z (395 m 2 g À 1 ; 0.174 cm 3 g À 1 ). DRS-UV-Vis and XPS results corroborate Sn incorporation into the framework of Sn 4 ZS 180 A 15 , based on the absorbance peak around 200-220 nm and peaks appearing at 495.8 and 487.4 eV, respectively. Sn 4 ZS 180 A 15 exhibits higher catalytic activity towards glucose isomerisation in ethanolÀ water at 110 °C, yielding 44.2 % fructose with 80.0 % selectivity. Conversely, the parent HÀ Z afforded negligible glucose conversion with a fructose yield of < 1 % under identical conditions. Moreover, Sn-incorporated on dealuminated (Sn 4 ZS 0 A 15 ) and desilicated (Sn 4 ZS 180 A 0 ) catalysts give a low yield of fructose (7-10 %), signifying the requirement of the desilication-dealumination process before incorporating Sn into the framework.

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Highly Selective Isomerization of Glucose to Fructose through a Biphasic and Recyclable Mimetic Enzyme Catalyst

Gan,

Meng,

Zhang

et al. 2024

ChemistrySelect

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Developing a biphasic catalyst is of great significance for improving reaction efficiency and its industrial application. Herein a novel biphasic catalyst containing three functional groups of chlorophenol, amino and carboxyl was synthesized and used as mimic glucose isomerase to catalyze the isomerization. The mimic enzyme exhibited excellent catalytic performance for isomerization of glucose to fructose under mild conditions. Temperature and pH of solution showed significant influence on the conversion of glucose and the selectivity of fructose. The yield and selectivity of fructose reached 32.4 % and 91.0 % after reacting 2 h, respectively, at pH 9.5 and 90 °C. The solubility of the catalyst exhibited dual sensitivity to both pH and temperature. The catalyst was in a soluble state during the reaction process and could be precipitated by reducing the pH and temperature of the reaction system. The catalyst could be reused and still maintained good catalytic activity after five consecutive cycles.

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Aluminum/Tin-doped UiO-66 as Lewis acid catalysts for enhanced glucose isomerization to fructose

Cited by 16 publications

References 40 publications

Improving the Glucose to Fructose Isomerization via Epitaxial‐Grafting of Niobium in UIO‐66 Framework

Improving the Glucose to Fructose Isomerization via Epitaxial‐Grafting of Niobium in UIO‐66 Framework

Enhanced Catalytic Activity of Modified ZSM‐5 Towards Glucose Isomerization to Fructose

Highly Selective Isomerization of Glucose to Fructose through a Biphasic and Recyclable Mimetic Enzyme Catalyst

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