Facile fabrication of NiTiO3/graphene nanocomposites for photocatalytic hydrogen generation

Magnetic ZnO Crystal Nanoparticle Growth on Reduced Graphene Oxide for Enhanced Photocatalytic Performance under Visible Light Irradiation

“…In the curves of MZG1, MZG2, MZG3, and MZG4 (Fe 3 O 4 /ZnO with different weight ratios of GO of 0.5, 1, 1.5, and 2 wt %, respectively), all the diffraction peaks corresponding to Fe 3 O 4 and ZnO crystals were exposed. In the status of higher graphene content (MZG4), a small peak belonging to reduced graphene oxide was detected at 2 theta ~24.11°, which was identical to the d spacing of ~0.369 nm [ 36 ]. The Debye-Scherrer equation was used to calculate the crystallite sizes of the prepared nanocomposites (Equation (1)).…”

“…The crystallite sizes of the prepared nanocomposites were detected in the range 33.5 to 32.8 nm. This indicated the crystallite size of Fe 3 O 4 /ZnO wasn’t changed after loading with rGO [ 36 ]. d = kλ/βcosθ where d is the mean particle diameter, assuming spherical particles, k is the Scherer constant (= 0.9), λ is the wavelength of the X-ray beam (1.5405 Å), β is the full width at half maximum (FWHM) of the diffracted peak, and θ is the angle of diffraction.…”

“…This indicated that the structure of GO changed in the presence of Fe 3 O 4 /ZnO to reduced graphene oxide [ 42 ]. The I D /I G ratios in MZG3 and MZG4 were near to each other due to the reduction of graphene oxide related to the ratio between Fe 3 O 4 /ZnO and GO [ 36 ], whereas according to the Raman analysis, the best ratio between Fe 3 O 4 /ZnO and GO for achieving a high reduction of graphene oxide was in MZG3. However, MZG4 had enrichment of graphene layers, which led to a stabilization of or a decrease in the reduction process and an accumulation of graphene layers in nanocomposite.…”

Mycogenic Silver Nanoparticles from Endophytic Trichoderma atroviride with Antimicrobial Activity

“…Based on their unique features, nanoparticles (NPs) are characterized by small with a large surface area and application in diverse fields, the fabrication of matter at the nanoscale (1-100 nm) has been improving rapidly in the last decade [1][2][3]. Besides chemical or physical methods or nano-synthesis of NPs by microorganisms and higher plants, fungi (myconanotechnology) came recently to attract the scientist's attention for the production of NPs [4][5][6][7][8][9][10][11][12][13]. Besides having a rich repertoire of enzymes, the use of fungi offers distinct advantages including ease of maintenance and scaling [14][15][16].…”

2D/2D Pomelo Peel Graphene/g-C3N4/Cu in situ for Enhancing Photocatalytic H2 Production under Visible Light Irradiation

“…So, with the help of graphene's unique electronic transmission characteristics, photocatalytic materials prepared with semiconductor and graphene composite can significantly improve the efficiency of photocatalysis and is expected to play a role in energy and environmental protection. [7][8][9][10][11] It has been reported that graphene combined with g-C3N4 can enhance the photoconversion efficiency of the material and therefore promote the performance photocatalytic hydrogen production. [12][13][14][15][16][17][18][19][20][21] In these composite catalytic systems, graphene reduces recombination rate of the electron-hole pair and also prevents semiconductor aggregation to some degree as an electron transfer substrate, which greatly improves the photocatalytic performance of the system.…”