An unusual three-dimensional homochiral metal saccharate based on inorganic helical chains

Zhang, Hua-Yi; Zhang, Guang-Ju; Wang, Xin; Yang, Juan; Chi, Xiao-Lin; Zhang, Jinling; Chen, Yu; Yang, Qi; Xiao, Dong‐Rong

doi:10.1016/j.inoche.2015.03.055

Cited by 4 publications

(4 citation statements)

References 32 publications

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“…[16,59] However, those studies were carried out under acidic pH conditions, so in our case, it is likely that another functionality is responsible for the reduction process. Remembering the high potential of aldaric acid to form complexes with metal species, [39,[60][61][62] we tested the ability of saccharic acid potassium salt to reduce Cr(VI) as a model of what could occur on our carbohydrate-based gels after Cr (VI) adsorption causes the colour to change (Figure 4c).…”

Section: Cr(vi) Reductionmentioning

confidence: 99%

Carbohydrate-supramolecular gels: Adsorbents for chromium(VI) removal from wastewater

Rizzo

Andrews

Steed

et al. 2019

Journal of Colloid and Interface Science

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Francesca (2019) 'Carbohydrate-supramolecular gels : adsorbents for chromium(VI) removal from wastewater.', Journal of colloid and interface science., 548 . pp. 184-196. Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. AbstractHypothesis. To overcome the contamination of water by heavy metals the adsorption of the pollutant on gel phases is an attractive solution since gels are inexpensive, potentially highly efficient and form a distinct phase while allowing diffusion of the contaminated water throughout the material. This work tests the chromium(VI) adsorbent capacity of new supramolecular gels for Chromium(VI) removal from wastewater.Experiments. First hydrophobic imidazolium salts of carbohydrate anions were synthesised as new gelators. Subsequently, they were dissolved in a solvent by heating and, after cooling overnight, to give the formation of supramolecular gels. The properties of the resulting gels, such as thermal stability, mechanical strength, morphology, rheology, and kinetics of gel formation, were studied as a function of gelator structure, gelation solvent and pollutant removal efficiency.Findings. Carbohydrate-derived gels showed the best removal capacity, i.e. 97% in 24 h.Interestingly, in one case, the reduction of chromium(VI) to chromium(III) also occurred after the adsorption process, and this phenomenon has been analysed using 1 H NMR spectroscopy, IR spectroscopy, and SEM. The most efficient gel can reach an adsorption capacity of 598 mg/g in contrast to a value of 153 mg/g for the most effectively best hydrogels reported to date. The new gel can be also recycled up to 4 times. These findings suggest that these new, supramolecular hydrogels have potential applications in environmental remediation.

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Section: Cr(vi) Reductionmentioning

confidence: 99%

Carbohydrate-supramolecular gels: Adsorbents for chromium(VI) removal from wastewater

Rizzo

Andrews

Steed

et al. 2019

Journal of Colloid and Interface Science

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“…On the other hand, according to previous reports, carbon coverage on catalyst surface weakens the adsorption of polar molecules such as DBT and accelerates their migration, which is beneficial to HDS reaction [8,37]. In addition, carbon species can also 20 increase electron density of Ni2P and enhance adsorption/activation of DBT [8]. This may be beneficial to HDS activity of MOF derived Ni2P at low pyrolyzing temperature.…”

Section: Effect Of Pyrolyzing and Phosphiding On Morphology And Struc...mentioning

confidence: 87%

“…On the one hand, the surface deposited carbon covered active sites of catalyst and hindered the contact between DBT and active sites. On the other hand, according to previous reports, carbon coverage on catalyst surface weakens the adsorption of polar molecules such as DBT and accelerates their migration, which is beneficial to HDS reaction [8,37]. In addition, carbon species can also 20 increase electron density of Ni2P and enhance adsorption/activation of DBT [8].…”

Section: Effect Of Pyrolyzing and Phosphiding On Morphology And Struc...mentioning

confidence: 91%

“…This makes it particularly important to design and develop innovative catalysts with excellent HDS performance for academia and industry [2][3][4][5][6]. In addition to improving the activity of typical Al2O3-supported Ni (Co) -Mo (W) sulfide HDS catalysts, noble metals, metal phosphides, metal silicides, metal borides, and metal carbides have all been used as catalysts for HDS reactions [7][8][9][10][11][12][13]. Among them, Ni2P is considered as a promising alternative to conventional HDS catalysts because of its high hydrogenation activity, good stability, and strong tolerance to sulfur and nitrogen [14,15].…”

Section: Introductionmentioning

confidence: 99%

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Effects of pyrolyzing and phosphiding on dibenzothiophene hydrodesulfurization of MOF-derived Ni2P

Liu

Wang

et al. 2023

Preprint

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MOF template, MOF-derived Ni, and MOF-derived Ni2P were characterized by XRD, TG, SEM, TEM, XPS and Raman. Hydrodesulfurization (HDS) of dibenzothiophene of MOF-derived Ni2P suggests that its catalytic performance depends on the active center number of Ni2P (111), the size of Ni2P clusters, the phosphiding degree of Ni and the intervals between Ni2P clusters. Reducing the pyrolyzing temperature of MOF template can slow down particle aggregation and change the morphology of Ni and Ni2P from closely packed polyhedron to loosely packed petal-like. At the same time, the cluster size of Ni2P was significantly reduced, resulting in a higher HDS activity. Prolonging pyrolyzing time at low pyrolyzing temperature leads to the gradual removal of MOF framework and makes nickel aggregates more susceptible to phosphiding. This increases the ratio of Ni2P to Ni of the phosphidized material, resulting in higher HDS activity of MOF-derived Ni2P. In situ phosphiding of crystalline nickel with PH3 did not change the shape of aggregates, but change the surface morphology of MOF derivied Ni. Low-temperature phosphiding can generally form pure Ni2P species, while high-temperature phosphiding will form a variety of impurities including Ni5P4. This will lead to a decrease in HDS reaction performance of MOF-derived Ni2P catalyst.

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A couple of Co(II) enantiomers constructed from semirigid lactic acid derivatives

Zhang

et al. 2016

Inorganic Chemistry Communications

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An unusual three-dimensional homochiral metal saccharate based on inorganic helical chains

Cited by 4 publications

References 32 publications

Carbohydrate-supramolecular gels: Adsorbents for chromium(VI) removal from wastewater

Carbohydrate-supramolecular gels: Adsorbents for chromium(VI) removal from wastewater

Effects of pyrolyzing and phosphiding on dibenzothiophene hydrodesulfurization of MOF-derived Ni2P

A couple of Co(II) enantiomers constructed from semirigid lactic acid derivatives

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