Fabrication of Se/C Coaxial Nanocables through a Novel Solution Process

Abstract

Se/C nanocables were first obtained through the reduction of Na2SeO3 with glucose in the presence of cetyltrimethylammonium bromide (CTAB) under hydrothermal conditions. In the process, glucose acts as a reducing agent and carbon source, and the final morphology of the product was determined by the CTAB concentration. The products are characterized in detail by multiform techniques: X-ray diffraction, energy-dispersive X-ray analysis, scanning electron microscopy, and transmission electron microscopy. The results show that the obtained products are coaxial nanocables with lengths of 2−6 μm, about 300−500 nm in diameter, and a surrounding sheath about 20−30 nm in thickness. It is of great importance and wide application that the obtained Se/C coaxial nanocables could be tailored freely by irradiation by an electron beam of transmission electron microscopy.

Hydrothermal Synthesis and Mechanism of Unusual Zigzag Ag2Te and Ag2Te/C Core‐Shell Nanostructures

“…The reports [15][16][17][18] predict that in the hydrothermal process the nanowires grow first, and the carbon shell occurs as the last step. Thus, as the process continues, glucose in the system carbonises to amorphous carbon and an amorphous carbon coats on telluride nanowires surface and finally results in the formation of silver telluride core-shell nanostructure.…”

Non-hydrothermal synthesis and optical limiting properties of one-dimensional Se/C, Te/C and Se–Te/C core–shell nanostructures

“…As mentioned before, we have used D-glucose as the reducing as well as carbonizing agent for the preparation of Se/C, Te/C and Se-Te/C core-shell 1D nanostructures. All previous reports on the preparation of Te/C and Se/C core-shell nanowires [35][36][37][38][39] are based on the hydrothermal synthesis technique. Except for the report by Hu et al [36], these studies predict that while the growth of nanowires happens first, and the amorphous carbon shell forms as the last step in the hydrothermal reaction.…”

“…Even though green chemical preparation of Se and Te nanowires has been achieved using biomolecules such as alginic acid [13], starch [14], b-carotene [15], and cellulose [17], all the methods reported so far are based on hydrothermal synthesis. The preparation of Se/C and Te/C core-shell nanowires (nanocables) [35][36][37][38][39] also is based on the hydrothermal technique. However it is important to simplify the presently followed green chemical synthesis strategy if it is to be used effectively for the preparation of nanomaterials.…”

Tunable photoluminescence properties of selenium nanoparticles: biogenic versus chemogenic synthesis

“…In the past, bacteria have been used to remediate environmental matrices contaminated with Se compounds, attenuating their critical concentration and, simultaneously, producing selenium NSs (SeNSs), which can be recovered [3][4][5][6][7]. This aspect represents a technological advantage since Se is a scarce and rare element of our Earth's crust featuring properties (e.g., high photoconductivity, piezoelectricity, thermoelectricity, spectral sensitivity) [8][9] that makes it of utmost importance at an economic level. Indeed, its application greatly impacts manufacturing industries, export, and job opportunity creation; as an "energy-critical element", Se-based products are, for example, involved in renewable energy-based technologies [10][11][12].…”