Superparamagnetic iron oxide nanoparticles (SPIONs) conjugated with lipase Candida antarctica A for biodiesel synthesis

Abstract

A newly designed biocatalyst prepared by conjugation of lipase A on SPION demonstrated high efficiency for biodiesel production. The nanomaterial was characterized by FTIR, TGA and XRD, and its enzymatic activity compared with a commercial standard.

Azo-functionalized superparamagnetic Fe3O4 nanoparticles: an efficient adsorbent for the removal of bromocresol green from contaminated water

“…In addition, the wide absorption band revealed at 3650–3000 cm −1 corresponds to O–H stretching vibration in all of the depicted spectra. 37 …”

“…These characteristic bands indicate that BCG was adsorbed onto the ADFS particles. 4,37 Moreover, the disappearance of the absorption band at 3674 cm À1 in the spectrum of ADFS conrmed the formation of hydrogen bonds between the hydroxyl and/or amino groups of ADFS and the oxygen atoms of BCG.…”

“…In addition, the wide absorption band revealed at 3650-3000 cm À1 corresponds to O-H stretching vibration in all of the depicted spectra. 37 The recorded FTIR spectra of ADFS before and aer the adsorption of BCG are displayed in Fig. 2.…”

Phosphotungstic acid impregnated niobium coated superparamagnetic iron oxide nanoparticles as recyclable catalyst for selective isomerization of terpenes

“…Superparamagnetic iron oxide nanoparticles (SPIONs), 7 nm large, was prepared by thermodecomposition process, as described previously. 35,[57][58][59] Characterization methods mPa and the spot size was 400 mm. The energy scale was calibrated with respect to the adventitious C 1s peak at 284.8 eV.…”

Nanobiocatalysts for Biodiesel Synthesis through Transesterification—A Review

“…Dimensions in the range of nanometers scale for the magnetic NMs ensures the peculiar superparamagnetic properties, enhanced surface area values, larger number of the available active site, cheap preparative methodology and facile separation procedures (removal from the medium by using the influence of external magnetic field) to be present in the NBCs. Commonly, the two types of ferrite colloids including magnetite (Fe 3 O 4 ) [29] and maghemite (γ-Fe 2 O 3 ) [30] are utilized as the magnetic nanocatalytic component of the NBCs. As indicated by the literature survey performed in Table 2, the NBCs containing Fe 3 O 4 NMs are most widely used as the main representative element for the magnetically active NBCs.…”