In situ reduced MXene/AuNPs composite toward enhanced charging/discharging and specific capacitance

Abstract

In this work, gold nanoparticles (AuNPs) decorated Ti3C2Tx nanosheets (MXene/AuNPs composite) are fabricated through a self-reduction reaction of Ti3C2Tx nanosheets with HAuCl4 aqueous solution. The obtained composite is characterized as AuNPs with the diameter of about 23 nm uniformly dispersing on Ti3C2Tx nanosheets without aggregation. The composite (MXene decorated on 4.8 wt% AuNPs) is further employed to construct supercapacitor for the first time with a higher specific capacitance of 278 F·g−1 at 5 mV·s−1 than that of pure Ti3C2Tx and 95% of cyclic stability after 10,000 cycles. Furthermore, MXene/AuNPs composite symmetric supercapacitor with filter paper as separator and H2SO4 as electrolyte, is assembled. The supercapacitor exhibits a high volumetric energy density of 8.82 Wh·L−1 at a power density of 264.6 W·L−1 and ultrafast-charging/discharging performance. It exhibits as a promising candidate applied in integrated and flexible supercapacitors.

Efficient photocatalytic hydrogen evolution coupled with benzaldehyde production over 0D Cd0.5Zn0.5S/2D Ti3C2 Schottky heterojunction

“…Thus, it is urgent to find a new co-catalyst to replace them [28][29][30]. MXene is a kind of twodimensional (2D) materials with a general formula of M n+1 X n T x , where M, X, and T denote transition metals, C or N, and surface terminations involving -OH, -O, and -F, respectively [31][32][33][34][35][36]. Ti 3 C 2 , a typical MXene, has great potential in photocatalysis due to its high metallic conductivity and rich surface functional groups, which can enhance the separation of photogenerated carriers and increase the surface active sites [37][38][39][40][41].…”

Microwave-assisted rapid synthesis of titanium phosphate free phosphorus doped Ti3C2 MXene with boosted pseudocapacitance

“…A Ragone plot in Fig. 5c shows the comparison of the volumetric energy and power density of the P-Ti 3 C 2 T x -MW-PA@1 : 10 based symmetric supercapacitor with those of many previously reported MXene and carbon based symmetric devices, 68,[80][81][82][83][84][85][86][87][88][89][90][91] where the present cell stands superior to all. Furthermore, we connected four such devices in series and recorded the CV at 5 mV s À1 in Fig.…”

Metal oxide semiconductor gas sensing materials for early lung cancer diagnosis

“…It is usually used together with metal oxides to make hybrid materials with heterostructure [59]. [60][61][62][63][64]. References [32,65,66] indicate that MXene-based 2D materials offer various merits for precisely detecting various breath biomarkers.…”