Fabrication of Hierarchically Porous Reduced Graphene Oxide/SnIn4S8 Composites by a Low-Temperature Co-Precipitation Strategy and Their Excellent Visible-Light Photocatalytic Mineralization Performance

Abstract

Hierarchically porous reduced graphene oxide/SnIn 4 S 8 (RGO/SnIn 4 S 8 ) composites with visible-light response and strong mineralization ability were first successfully prepared by a facile low-temperature co-precipitation method, and were characterized by X ray diffraction (XRD), scanning electron microscope (SEM), Brunauer-Emmet-Teller (BET), UV-Visible spectrophotometer (UV-Vis), Raman spectra and Photoluminescence (PL) techniques. RGO/SnIn 4 S 8 composite exhibits strong absorption in UV and visible-light range. The optimized 5% RGO/SnIn 4 S 8 possesses the optimal photocatalytic degradation efficiency and the best mineralization performance with complete degradation of Rhodamine B (RhB) within 70 min and 73.17% mineralization yield within 160 min under visible-light irradiation, which is much higher than that of pure SnIn 4 S 8 . The main reactive species, which play crucial roles in the degradation and mineralization of RhB, follow the order of h + >¨O 2´>¨O H. The intermediate products of RhB degradation were analyzed by using high performance liquid chromatography-tandem mass spectrometry (HPLC-MS), and the possible degradation pathways and mechanism were proposed. Moreover, 5% RGO/SnIn 4 S 8 exhibits excellent reusability and stability without an obvious decrease in photocatalytic activity after four consecutive photocatalytic degradation-regeneration experiments.

A facile synthesis of porous graphene for efficient water and wastewater treatment

“…653 m 2 g −1 , which was significantly higher than that of rGO derived PG (ca. 82.76 m 2 g −1 ) and that of porous rGO reported previously (62 m 2 /g 10 , 31 m 2 /g 50 , 134 m 2 /g 51 , 372 m 2 /g 52 .). The increased pore volume of PG (ca.…”

Continuous Flow Selective Hydrogenation of 5-Hydroxymethylfurfural to 2,5-Dimethylfuran Using Highly Active and Stable Cu–Pd/Reduced Graphene Oxide

“…Synthesized samples were characterized using several techniques including BET, SEM-EDX, XRD, XPS, TEM and H 2 -TPR. N 2 adsorption/ desorption isotherms of support and synthesized catalysts exhibited typical type IV (IUPAC classification) corresponding to mesoporous materials, 22 and the isotherms showed a H 3 hysteresis loop, suggesting that slit-like pores existed between parallel layers of graphene (Figure S1). The porosity characteristics of the samples are listed in Table 1.…”

Excellent photocatalytic reduction of nitroarenes to aminoarenes by BiVO4 nanoparticles grafted on reduced graphene oxide (rGO/BiVO4)

“…Figure (D) shows the N 2 adsorption–desorption isotherms of rGO and rGO/BiVO 4 –10%. It is clear that both rGO and rGO/BiVO 4 owned type‐IV isotherm (based on IUPAC classification) with a distinct hysterical loop, indicating the existence of slit‐liked pores formed by the aggregation of plate like particles in the rGO and rGO/BiVO 4 with BET surface areas of 104.01 and 115.63 m 2 /g, respectively (Table ). This shows that the contact area of nitroarenes between rGO/BiVO 4 is more than rGO and the high catalytic efficiency of rGO/BiVO 4 is partly for this reason.…”