Tunable negative thermal expansion of ultralight ZrW2O8/Graphene hybrid metamaterial

Facile synthesis of platelet‐like zirconium tungstate nanostructures for high‐performance supercapacitors

“…After 750°C, there was a loss of 6.58% by weight of ZrW 2 O 8 NPs, which might be ascribed to the burning of flammable matter in ZrW 2 O 8 NPs. Hence, TGA analysis revealed the excellent thermal stability of ZrW 2 O 8 NPs 39 . The N 2 adsorption‐desorption analysis of ZrW 2 O 8 NPs is given in Figure 1E, which portrayed type IV curve.…”

“…Furthermore, the peaks in Zr 3d spectrum (Figure 3B) at 182.0 and 184.3 eV were related to Zr 3d 5/2 and Zr 3d 3/2 while W 4f spectrum (Figure 3C), which delivered two peaks at 35.2 and 37.3 eV were attributed to the binding energy of W 4f 7/2 and W 4f 5/2 states respectively. 39,41 Furthermore, O 1 s displayed the peaks at the binding energies of 530.2, 531.0, and 529.5 eV. The peak at 530.2 eV was allotted to typical Moxygen bond (Zr-O-W) of ZrW 2 O 8 NPs, and the binding energy noted at 531.0 and 529.5 eV were assigned to the O-containing functionalities of ZrW 2 O 8 NPs sample.…”

“…Hence, TGA analysis revealed the excellent thermal stability of ZrW 2 O 8 NPs. 39 The N 2 adsorption-desorption analysis of ZrW 2 O 8 NPs is given in Figure 1E, which portrayed type IV curve. The specific surface area of the sample was calculated using Brunauer-Emmett-Teller (BET) and it was found to be 25.318 m 2 /g and the pore diameter was found to be 3.632 nm.…”

Improving room temperature negative thermal expansion performance of Fe2‐xScx(MoO4)3

“…The increasing interests can be attributed to the potentiality of fabricating materials with near-zero or controllable CTE. [1][2][3][4][5] The family of A 2 (MoO 4 ) 3 (A = a trivalent main metal, transition metal or lanthanide, M = W or Mo) compounds is well known for its great chemical flexibility and strong NTE properties. [6][7][8][9][10] Some of them, such as A 2 (MoO 4 ) 3 (A = Al, In, Cr, and Fe), show positive thermal expansion at low temperatures, then undergo a monoclinic-to-orthorhombic (M-O) phase transformation with the increasing temperature [11][12][13] and display NTE.…”

“…Over the past two decades, a significant amount of research into negative thermal expansion (NTE) materials that contract upon heating has been carried out. The increasing interests can be attributed to the potentiality of fabricating materials with near‐zero or controllable CTE 1–5 . The family of A 2 (MoO 4 ) 3 (A = a trivalent main metal, transition metal or lanthanide, M = W or Mo) compounds is well known for its great chemical flexibility and strong NTE properties 6–10 .…”