2.权利要求1所述MIL‑101(Cr)负载的羟基咪唑离子液体的制备方法,其特征在于,包 括如下步骤:将1‑(2‑羟乙基)咪唑和MIL‑101‑CH Cl在溶剂DMF存在条件下于100±10℃下 2 反应24 48h,反应结束后经离心、洗涤、干燥后即得。 ~ 3.根据权利要求2所述MIL‑101(Cr)负载的羟基咪唑离子液体的制备方法,...
研究M<SUB>2</SUB>SiC相的结构、电子特性、弹性和热性能(M为3 d, 4 d和5 d前过渡金属)。分析Ti、V、Cr、Zr、Nb、Mo、Hf、Ta 和W价电子浓度(VEC)对这些性能的影响。每个系列金属在VEC值约为8.5时弹性常数C44达到饱和。Hf-s、Ta-s 和 W-s电子主要在费米能级对态密度有贡献,可
The water soluble charged molecules bind to oppositely charged moieties by forming covalent bonds to the insoluble stationary phase (Luqman and Inamuddin, 2012). IC is useful for the determination of Cr(VI), and possible interferences include iron, copper, nickel, vanadium. Ten µM of any of...
A dative bond is a covalent bond, in which all of the shared valence electrons come from the ligand itself. The total number of unique dative bonds formed is the coordination number of the complex. Some ligands can bind to the metal cation using two different donor groups, so we call ...
The PSO kinetic model is applied in chemical adsorption processes that generate covalent forces through the sharing or exchange of electrons between the biosorbent and the adsorbate. The pseudo-second-order equation is shown in Eq. (13) $${\text{t}}/{\text{q}}_{{{\text{t}}({\text{ads...
A new model which describes the peculiarities of the phonon spectra of homo- and heterodesmic crystals is developed in the present paper. A salient feature of the model is that the specific properties of the heterodesmic compounds (existence of large covalent groups) are considered explicitly by...
[37], for covalent and metallic materials the value ofσis between 0.1 and 0.33. The calculated values of Poisson’s ratio are gathered in Table3, clearly indicate that all the PrXO3(X = V, Cr, Mn, and Fe) compounds are effected with central contributions, suggesting the ionic ...
3.8 The mechanisms of the biosorption Biosorption involves different mechanisms such as com- plexation/chelation, ion exchange, electrostatic attraction, covalent forces, van der Waals forces, surface adsorption and even precipitation or crystallisation. Sometimes, more 13 Biomass Conversion and ...
Three bonds in different proportions occur in such binary nitrides: metallic (Me-Me), ionic (caused by the charge transfer between Me and N), and covalent (Me-N) components [65]. These bond contributions mainly determine the coating properties. For instance, the high hardness is attributed ...
reported that UiO-66 can form a covalent bond with As(Ⅴ) through the hydroxyl function group to remove arsenic from water [15]. Li et al. used a silver-triazolato framework to remove Cr(VI) from water and the results showed that it displayed a fast, efficient and reversible adsorption ...