Self-sacrificed template method for the synthesis of ZnO-tubular nanostructures:reaction kinetics and pathways

Merging of Kirkendall Growth and Ostwald Ripening: CuO@MnO2 Core-shell Architectures for Asymmetric Supercapacitors

“…The vacancies, which can diffuse to metals as a counterflow to the outward diffusion of metallic ions, can aggregate to generate voids. Such growth mechanism for the CuO nanotubes is in line with previous studies demonstrating that formation of oxide nanotube is through the Kirkendall-type diffusion process 44 45 46 . It is worthy of noting that the interconnected MnO 2 nanosheets and hollow CuO nanotubes give rise to a highly porous morphology, which can offer very high surface area and a large number of active sites for the adsorption of Na + .…”

AgPb10SbTe12 microrods with a rough surface grown through an in situ template route and their electrical transport properties

“…What is more, the atomic ratio of Ag is far more than the stoichiometric assignment due to the first reduction from Ag + ions. Therefore, we can conclude that Ag + and TeO 3 22 can be reduced to form Ag-doped Te rods, which can act as an in situ template. The growth of the final AgPb 10 SbTe 12 rods may undergo two processes.…”

“…The other possibility is that the formation may be attributed to the in situ template mechanism. [20][21][22] Using this synthetic route, CuS nanotube arrays, 23 CdS nanosponges, 24 and La 2 Te 3 nanowires 25 were fabricated. To shed light on the formation mechanism of the as-synthesized rods, time-dependent experiments were carried out.…”

“…On the basis of the above results, the formation mechanism of the AgPb 10 SbTe 12 rods in our experiment follows an in situ template synthesis process. In order to reconfirm the order in which the Ag + , Pb 2+ , Sb 3+ , and TeO 3 22 ions are reduced by N 2 H 4 , some contrast experiments are employed. Fig.…”

“…Normally, Na 2 TeO 3 can be readily reduced to Te by hydrazine. However, elemental Te will quickly simultaneously oxidize and reduce to Te 4+ and Te 22 with the presence of an alkaline and Te 22 will react with metal ions to form metal tellurides resulting in heterogeneous nucleation and therefore samples with various morphologies. Many experimental results have been reported to confirm this fact.…”