Layer-stacked tin disulfide nanorods in silica nanoreactors with improved lithium storage capabilities

Abstract

A new structure of layered materials, layer-stacked nanorod, has been fabricated through an entirely new template-engaged structural transformation methodology. The formation of layer-stacked hexagonal tin disulfide (SnS(2)) nanorods has been demonstrated as an example by using tetragonal tin (Sn) nanorods as sacrificing templates and silica (SiO(2)) as nanoreactors. In addition, the structural transformation process probably involves the formation of orthorhombic tin sulfide (SnS) nanorods as an intermediate product. The rod-like morphology and single-crystal feature of the Sn templates are well preserved in both SnS(2) and SnS products due to the nanoscale confinement in silica. Owing to its unique structural characteristics, the SnS(2)-SiO(2) nanorod anode exhibits excellent capacity retention and improved rate capability, facilitating its application in lithium ion batteries with long cycle life and high power density.

Cascade of Liquid‐Phase Catalytic Transfer Hydrogenation and Etherification of 5‐Hydroxymethylfurfural to Potential Biodiesel Components over Lewis Acid Zeolites

“…First, ZnO NRs were synthesized by using a seed‐assisted wet chemical method, according to a previous report 7. Second, a SiO 2 layer was coated on the ZnO NRs through a modified Stöber method, using TEOS as the silica precursor 8. Third, the ZnO@SiO 2 NRs were surface functionalized with PDDA, and the PDDA‐modified ZnO@SiO 2 NRs and GO (3:1 by weight) were dispersed in distilled water and stirred for 6 h, resulting in the GO‐wrapped ZnO@SiO 2 NRs network 6b.…”

“…In brief, ZnO templates are prepared through a seed‐assisted wet chemical method, and manifest a typical rod‐like morphology with a smooth surface and diameters of 20–50 nm (Figures 2 a and b) 7. Then, the pristine ZnO NRs are coated by uniform SiO 2 layers through the hydrolysis–condensation reactions of tetraethyl orthosilicate (TEOS) 8. After silica coating, the rod‐like morphology of the templates is well preserved in the ZnO@SiO 2 NRs (Figures 2 c and d), and the thickness of the silica layer is controlled to be approximately 5–10 nm in these core–shell NRs (Figure S1).…”

Ultrathin SnS2 nanosheets of ultrasonic synthesis and their photoresponses from ultraviolet to near-infrared

“…In the past years, a large number of SnS 2 micro-/nano-structures have been synthesized such as hierarchical microspheres [42], hollow spheres [43], nanowires [44], nanorods [45], nanotubes [46] and nanoflakes [47]. Recently, a few preparation methods have been developed for preparing ultrathin SnS 2 nanosheets including mechanical exfoliation [40], chemical vapor deposition [41], and solvothermal synthesis [48].…”

Ag2S quantum dots in situ coupled to hexagonal SnS2 with enhanced photocatalytic activity for MO and Cr(vi) removal

“…19 As the research goes on, different morphologies of SnS 2 nanomaterials have been obtained (such as nanoowers, 20 nanotubes, 21 nanorods, 22 and nanoplates 23 ) to produce higher specic area or control the band gap energies. Even so, the photocatalytic ability of SnS 2 still has been limited by the high recombination rate of photo-generated carriers.…”