Hydrothermal Synthesis of MoS2/rGO Heterostructures for Photocatalytic Degradation of Rhodamine B under Visible Light

Abstract

MoS2/rGO composites were synthesized by hydrothermal method from the precursors of MoS2 and reduced graphene oxide (rGO) prepared in the former steps. The influence of the synthesis conditions including hydrothermal temperature and mass ratio of MoS2 to rGO on the structure, morphology, and optical absorption capacity of the MoS2/rGO composites was systematically investigated using physicochemical characterizations. The photocatalytic performance of as-prepared samples was investigated on the degradation of Rhodamine B under visible light, in which, the composites obtained at hydrothermal temperature of 180°C and MoS2/rGO mass ratio of 4/1 exhibited the highest photodegradation efficiency of approx. 80% after 4 hours of reaction. This enhancement in photocatalytic behaviour of composites could be assigned to the positive effect of rGO in life time expansion of photoinduced electrons—holes.

Nonvolatile Memristive Devices Based on In Situ Functionalized Layered rGO-MoS2 Nanocomposites

“…The d spacing for the strong peak is found to be 6.14 Å for the (002) plane. 41,42 Interestingly, the characteristic peak of rGO in the rGO-MoS 2 NCs remains absent even after changing the molar ratio of molybdenum and sulfur sources. However, a substantial increase in the crystallinity of MoS 2 in rGO-MoS 2 NCs is noticed.…”

“…40 Due to the intrinsic broadband light absorption of rGO, the absorption spectra of the rGO-MoS 2 hybrid is higher than that of pristine MoS 2 over the whole spectral range. The rGO-MoS 2 exhibits two peaks at around 602 nm and 657 nm, 15,26,41,42 suppressing any traces of rGO in the composites. Using Tauc's plot (Fig.…”

Dual Stimuli-Responsive Multifunctional Silicon Nanocarriers for Specifically Targeting Mitochondria in Human Cancer Cells

“…Among current materials such as silica [8,9], metal organic frameworks [10][11][12][13][14][15], composites [16][17][18][19], and metal compounds [20][21][22], mesoporous silicon NPs have received considerable attention in the field of biomedical drug delivery due to their outstanding properties such as in vitro biocompatibility, in vivo biodegradability, and high photothermal activity [23,24]. A complete magnesiothermic reduction of mesoporous silica NPs (MSN) has provided a platform for the rational design of multifunctional silicon nanostructures for controlled and targeted delivery of therapeutic agents [25,26].…”