Controllable synthesis of magnetic Fe3O4 encapsulated semimetal Bi nanospheres with excellent stability and catalytic activity

Metal-bio functionalized bismuthmagnetite [Fe3−xBixO4/SiO2@l-ArgEt3+I−/Zn(ii)]: a novel bionanocomposite for the synthesis of 1,2,4,5-tetrahydro-2,4-dioxobenzo[b][1,4]diazepine malononitriles and malonamides at room temperature and under sonication

“…The broad band at 3440 cm −1 and the peak at 1633 cm −1 are related to the stretching and bending vibrations of the hydroxyl group, respectively. 52 As shown in Fig. 1b , the appearance of bands at 1085 cm −1 (Si–O–Si stretching vibrations), 790 cm −1 (Si–O–Si bending vibrations), and 466 cm −1 (Si–O–Si rocking vibrations) confirmed the embedding of silica on the bismuthmagnetite core.…”

A Predictable Catalyst Model for Highly Active and Selective Catalysis of Hydrogenation of Nitroarenes: Comprehension of Various Precious Metal Nanoparticles

“…As presented in Figure a, the survey spectrums of samples 1a, 1b, 1 f and 1j demonstrate the existence of all their own elements, respectively, which further confirms that all samples have been successfully prepared. In Figure b, the high‐resolution Fe 2p spectrum peaks of the sample 1a at 710.3 and 723.5 eV are assigned to the binding energies of Fe 2p 3/2 and Fe 2p 1/2 , respectively, and these reveal the presence of Fe 3 O 4 . It is worth noting that the binding energies of Fe 2p for samples 1b, 1 f and 1j are similar to that of 1a, which indicates the electron densities of their Fe have not obvious change.…”

Eco-Friendly Coffee Waste-Based Carbon Dots Coupled to ZnBi-Layered Double Hydroxide Heterojunction: Enhanced Control of Interfacial Charge Transfer for Highly Efficient Visible-Light Catalytic Activity

“…For bare ZnBi 2 O 4 , the peaks appearing at 1630 and 3450 cm −1 correspond to the bending and stretching vibration peaks of O-H, respectively [37]. Te absorption peaks appear at wavenumbers of about 1381 and 847 cm −1 confrm the presence of the Bi-O bonds [31,38] and Bi-O-Bi bonds [6,39,40], respectively. As seen in Figure 1(b), the bands in the range of 3600-3200 cm −1 in the bare CD spectrum are the typical bands of the stretching vibration modes for hydroxyl (O-H) and N-H groups.…”

“…One approach involves coupling semiconductors to achieve a new tunable bandgap semiconductor. Various types of catalysts have been combined in composites to achieve improved photocatalytic activity such as TiO 2 @MgFe 2 O 4 [2], Ag 3 PO 4 -TiO 2 [3], Mn-ZnOgraphene [4], TiO 2 -zeolite [5], Bi@Fe 3 O 4 [6], Eu-doped Bi 2 WO 6 [7], Bi 2 Sn 2 O 7 -reduced graphene oxide [8], and Bi 2 S 3 -Bi 2 Sn 2 O 7 [9].…”