FTIR Spectroscopy. Depending on the iron content, and according with the previous published results, two prevailing cationic forms were identified by bands formed in region of skeletal vibrations between 980 cm-1 and 860 cm-1 for all three iron zeolites (for more details see e.g. [19]). In...
In this research, Fe3O4@SiO2@NTMPThio-Cu was introduced as a novel and green heterogeneous nanocatalyst with a dendrimer template that is environmentally friendly and reusable based on Fe3O4@SiO2. In this way, magnetic silica nanoparticles were first mod
iT: hhrttepe:-/d/dimx.denosi.ioornga/1l 0F.e130O146-/gj.rjahpahzmenaet.2m0a1c5r.o05sc.0o1p1ic(2c0o1m5p).osites for arsenic and arsenate 17. Simeonidis, K. 1008–1015, doi: ehtttapl:.//Mdxa.gdnoei.toicrgs/e1p0a.1r0a1ti6o/nj.coefj.2h0e1m1a.0ti1t.e0-7c4o(a2te...
Polarised Raman and Fourier transform infrared (FTIR) absorption spectra have been obtained for a series of glasses in the system SiO 2(GeO 2) Al 2O 3 Fe 2O 3 K 2O in order to investigate changes in the glass structure with SiO 2/GeO 2 ratio. The results indicate that Ge 4+ ...
如图1所示,该图为fe/fes@sio2材料的ftir谱图。从图1可以看出,3462cm-1的宽带峰可归因于吸附水分子的伸缩振动和水化硅烷醇组的o-h。1620cm-1的波段的小峰可以归因于吸附水分子的h-o-h弯曲振动。以1062和457cm-1为中心的频带是si-o-si的伸缩振动,si-o-si是合成的介孔氧化硅的特征峰。在之前的实验中,我们...
图2 (a) 室温下CdS、0.6-FeOOH/CdS和FeOOH对苯甲醇和 (b) 苯甲醛的自然吸附 (c) 苯甲醇和(d) 苯甲醛在不同催化剂上吸附的FTIR光谱 (e)不同催化剂与苯甲醇或苯甲醛之间的接触角 图3 (a) 反应开始后的前10分钟 (b) 反应结束后的Br和Fe的EDX映射图(紫色:Fe,黄色:Br)。苯甲醇的位置可以通过Br的...
聚合物负载四氧化三铁纳米颗粒Fe3O4 NPs: 通过自由基聚合法,以N-乙烯吡咯烷酮(VP)为反应单体,采用季戊四醇四-3-巯基丙酸酯(PTMP)为链转移剂合成了水溶性的硫醚聚合物配体PTMP-PVP。通过高温共沉淀法进一步由PTMP-PVP制备得到硫醚封端的四氧化三铁(Fe_3O_4)磁性纳米颗粒PTMP-PVP@MIONs。运用DLS、FTIR、TGA...
A strategy is reported herein to covalently graft hyperbranched polyethylenes( HBPEs) onto magnetic nanoparticles( NPs). Core-shell Fe3O4@ Si O2 magnetic NPs( FS) were first synthesized via a reverse microemulsion method and then surface modified with a coupling agent,3-acryloxypropyltrichloros...
It has been found that Al pairs in 6MRs of the framework greatly stabilize divalence of bare Fe(II) ions and [Fe(II)–O–Fe(II)]2+ complexes even in oxidizing atmosphere. These species were completely oxidized only with N2O and recognized as the most active sites in N2O decomposition. ...
Figure 1g displays the impact of CVD on the FTIR data of Fe-Si-Cr. The appearance of three typical IR peaks, at 441 cm–1 for rocking vibrations, 717 cm–1 for bending vibrations, and 1083 cm–1 for asymmetrical stretching vibrations, confirmed the existence of Si-O-Si bonds [10,11,...