3.3 Zeta电位分析利用Zeta电位分析仪分别测定了在不同pH值的水溶液中, MIL-125和NH2-MIL-125材料的Zeta电位, 结果如图9a所示.由图可知, 两种材料表面的Zeta电位均为负值, 且随着pH的增加, Zeta电位的绝对值逐渐增大.这是因为当pH值增加时, 水溶液中越来越多的OH-被吸附到材料表面, 材料表面的负电荷数增加...
将刚性mtn拓扑调整为μ-OH桥接框架会对吸附剂产生呼吸效应。与Cr:Fe(100:0)相比,Cr:Fe(50:50)的BET比表面积(8.9 m2 /g vs 2062.7 m2 /g)更小,但PNA吸附量更高(378.9 mg/g vs 229.6 mg/g)。在较宽的pH范围内(pH = 2-11), PNA吸附在Cr:Fe(50:50)上是可行的。介孔MIL-53的吸附机理是基于氢键...
MIL-125(Ti)/MIL-53(Fe) binary metal organic framework (MOF) was synthetized and incorporated with carbon nanotube (CNT) into alginate (Alg) microbeads to form MIL-125(Ti)/MIL-53(Fe)/CNT@Alg composite microbeads. Various tools including FTIR, XRD, SEM, BET, Zeta potential and XPS were ...
However, almost the same zeta potential trend was observed after adsorbing As(III). The inner-complex for- mation could also keep a constant surface charge, as shown in Fig. 7B for As(III) adsorption. Thus, both As(V) and As(III) form inner-sphere complexes with the hybrid adsorbent...
(Powder XRaydiffraction), DLS and Zeta potential (Dynamic light scattering), AST and ALT liver index, and TEM (Transmission electron microscopy) analysis have been performed by flowing devices respectively: Unicam Maston 1000 FT-IR spectrophotometer (room temperature, 400–4000 cm−1, KBr pellets...
(Fig.6h)53. The synthetic organic–metallic framework was determined to possess pores characterized by a specific surface area of 1955 cm2/g and an average diameter of 0.8 nm, as determined using BET analysis54. The organic–metallic framework synthesized in this investigation exhibited a total ...
The Zeta potential of the prepared MOF at pH 3–11 was measured using a Zeta Sizer (Malvern, England). CCD experimental design. Experimental design and statistical analysis of data were performed with RSM- CCD. The main advantage of this method is the development of a mathematical model ...
2014, 53, 2491–2500. [CrossRef] [PubMed] 46. Socrates, G. Infrared Characteristic Group Frequencies: Tables and Charts, 2nd ed.; John Wiley Sons: Chichester, UK, 1994. 47. Hunter, R.J. Zeta Potential in Colloid Science: Principles and Applications; Academic Press: London, UK, 1988. ...
agreement with the experimental results. Thus, chemisorption occurred during the iAs removal process. Valence forces through the sharing or exchange of electrons were involved between iAs and the hybrid MNPs, which agreed well with previous reports about the formation of the Fe-O-As structure39,53...
图4. MIL-53(Cr,Fe)的吸附能力和BET表面积与其他研究成果的比较 图5.(a) pH变化的影响,(b) Zeta电位的影响,(c)温度的影响,(d) Cr:Fe(50:50)用量对PNA吸附能力和效率的影响 图6.x光扫描光谱;(a)全谱,(b) N 1 s, (c) O 1 s, (d) Fe 2p, (e) Cr 2p, (f) c代表原始和吸附后的 Cr...