Synthesis of mesoporous niobium oxophosphate using niobium tartrate precursor by soft templating method

Considerable efforts have been devoted to extending the range of the elemental composition of mesoporous materials since the pioneering work of the M41S family of ordered mesoporous silica by Mobil researchers. The synthesis of transition metal-containing mesostructured materials with large surface area and high porosity has drawn great attention for its potential applications in acid and redox catalysis, photocatalysis, proton conducting devices, environmental restoration and so on. Thus, various transition metals-containing mesoporous materials, including transition metal-substituted mesoporous silicates, mesostructured transition metal oxides and transition metal phosphates (TMP), have been documented in the literature. Among these, mesostructured TMP materials are less studied, but possess some unique features, partly because of the easy and facile functionalization of PO4 and/or P–OH groups, rendering them interesting functional materials. This review first introduced the general synthesis strategies for manufacturing mesostructured TMP materials, as well as advantages and disadvantages of the respective method; then, we surveyed the ongoing developments of fabrication and application of the TMP materials in three groups on the basis of their components and application fields. Future perspectives on existing problems related to the present synthesis routes and further modifying of the functional groups for the purpose of tailoring special physical-chemical properties to meet wide application requirements were also provided in the last part.

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“…Both Brønsted and Lewis acid sites existed on the surface of materials, as confirmed by means of pyridine adsorption [100]. …”

Section: Synthesis and Application Of Mesostructured Transition Mementioning

confidence: 99%

A Review on the Synthesis and Applications of Mesostructured Transition Metal Phosphates

Lin

Ding

2013

Materials

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“…2. The figure shows a strong band with a maximum at 1033 cm − 1 corresponds to the asymmetric vibration stretching mode of phosphate ion which is similar to the analogous phosphate materials [15,17]. Another strong band is found at 660 cm − 1 for the calcined sample, which could be mainly due to Ta-O-Ta stretching modes [17].…”

Section: Resultsmentioning

confidence: 59%

“…Another strong band is found at 660 cm − 1 for the calcined sample, which could be mainly due to Ta-O-Ta stretching modes [17]. The bands near 3440 cm − 1 and 1629 cm − 1 could be assigned as for the O-H and H-O-H species respectively [15,17]. Low angle XRD pattern (Fig.…”

Section: Resultsmentioning

confidence: 90%

“…Among them mesoporous metal phosphates have attracted great research attention for their special characteristics such as suitable mobility of lattice oxygen and mild acid-base properties, which lead their applications as selective catalysts for oxidative reactions [6]. Transition and non-transition metal ion based these mesoporous phosphates include examples of aluminum phosphates [7], titanium phosphates [8], tin phosphates [9], zirconium phosphates [10,11], iron phosphates [12], phosphates of Ce, In, W, V [13], Nb [14,15] and Cr [16]. Recently synthesis of mesoporous organic-inorganic hybrid and organic free tantalum oxophosphate has also been attempted by Mal et al [17].…”

Section: Introductionmentioning

confidence: 99%

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A new and facile route to prepare mesoporous tantalum phosphate with high surface area using tantalum tartrate precursor

Саркар

Pramanik

2010

Journal of Non-Crystalline Solids

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“…Niobium tartrate was prepared in our laboratory according to the literature. [29] All other chemicals were purchased from Sinopharm Chemical Reagent Co. Ltd without further purification.…”

Section: Experimental Section Materialsmentioning

confidence: 99%

Conversion of raw lignocellulosic biomass into branched long‐chain alkanes through three tandem steps

Ding

Xia

et al. 2016

ChemSusChem

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Synthesis of branched long-chain alkanes from renewable biomass has attracted intensive interest in recent years, but the feedstock for this synthesis is restricted to platform chemicals. Here, we develop an effective and energy-efficient process to convert raw lignocellulosic biomass (e.g., corncob) into branched diesel-range alkanes through three tandem steps for the first time. Furfural and isopropyl levulinate (LA ester) were prepared from hemicellulose and cellulose fractions of corncob in toluene/water biphasic system with added isopropanol, which was followed by double aldol condensation of furfural with LA ester into C15 oxygenates and the final hydrodeoxygenation of C15 oxygenates into branched long-chain alkanes. The core point of this tandem process is the addition of isopropanol in the first step, which enables the spontaneous transfer of levulinic acid (LA) into the toluene phase in the form of LA ester through esterification, resulting in LA ester co-existing with furfural in the same phase, which is the basis for double aldol condensation in the toluene phase. Moreover, the acidic aqueous phase and toluene can be reused and the residues, including lignin and humins in aqueous phase, can be separated and carbonized to porous carbon materials.

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Synthesis of mesoporous niobium oxophosphate using niobium tartrate precursor by soft templating method

Cited by 49 publications

References 31 publications

A Review on the Synthesis and Applications of Mesostructured Transition Metal Phosphates

A Review on the Synthesis and Applications of Mesostructured Transition Metal Phosphates

A new and facile route to prepare mesoporous tantalum phosphate with high surface area using tantalum tartrate precursor

Conversion of raw lignocellulosic biomass into branched long‐chain alkanes through three tandem steps

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