Polymeric Ti₃C₂T_x MXene Composites for Room Temperature Ammonia Sensing

Abstract

A series of polymeric titanium carbide (Ti3C2T x ) MXene composites were prepared by in situ polymerization of 3,4-ethylenedioxythiophene (EDOT) and poly­(4-styrenesulfonate) (PSS) on Ti3C2T x MXene materials. The resulting PEDOT:PSS/MXene composites were fabricated into a gas sensor using a dip coating technique. The composite sensor was able to measure ammonia (NH3) at room temperature and showed a strong gas response of 36.6% against 100 ppm of NH3 with the response and recovery time of 116 and 40 s, respectively. In addition, the composite sensor exhibited enhanced sensing performance compared to both pure PEDOT:PSS- and Ti3C2T x MXene-based sensors, demonstrating a synergistic effect between PEDOT:PSS polymers and Ti3C2T x MXene 2D materials. These data suggested the great potential of using PEDOT:PSS/MXene composite sensors for room temperature detection of NH3.

Assessment of Occlusal Force and Local Gas Release Using Degradable Bacterial Cellulose/Ti3C2Tx MXene Bioaerogel for Oral Healthcare

“…These results clearly suggest a synergistic effect between cellulose, which improves the gas response of the biocomposite, and MXene. The cellulose fiber possesses rich −OH groups and easily forms hydrogen bonds with the abundant functional groups on the surface of MXene, which may lead to significant changes in carrier density and enhance the response. , In addition, the bioaerogel with a 3D porous structure provides a larger surface area and generates more effective NH 3 molecule adsorption sites. − Considering this, we anticipate that the proposed BC/MXene aerogel-based sensor will effectively sense trace NH 3 molecules and enrich the application fields of MXene materials.…”

Architecting Nb‐TiO2−x/(Ti0.9Nb0.1)3C2Tx MXene Nanohybrid Anode for High‐Performance Lithium‐Ion Batteries

“…[63,64] And the I G / I D values of TNC, TNC-300, TNC-450, and TNC-600 are 0.39, 0.69, 0.77, and 0.89, respectively, indicating the existence of high disorder and many defects in the samples as the calcination temperature increases, and these abundant defects and the formation of disordered carbon will promote the conduction of electrons. [65][66][67] In addition, the bonding information of the sample is further tested by X-ray photoelectron spectroscopy (XPS). As exhibited in Figure 1c, the peak positions of C 1s, Ti 2p, Nb 3d, and O 1s of TNC-300, TNC-450, and TNC-600 have shifted towards higher binding energy, implying some phase changes must occur after calcination.…”

Emergence of MXene–Polymer Hybrid Nanocomposites as High‐Performance Next‐Generation Chemiresistors for Efficient Air Quality Monitoring

“…[ 37 ] These strategies include dip coating, spin coating, drop‐casting, spray coating, and inkjet printing. In this direction, Jin et al [ 130 ] fabricated the MXP HNC of PEDOT:PSS and Ti 3 C 2 T x using chemical‐based polymerization of EDOT monomer over Ti 3 C 2 T x ‐MXene to manifest PSS ( Figure a). In contrast, Qin et al [ 131 ] adopted an in situ electrodeposition route for architecting MXene/PPy HNC possessing a 3D porous morphology.…”

“…[ 10 ] It is demonstrated by optimizing the precursor's HNC concentration to attain the desired conductivity regime. Jin et al [ 130 ] analytically examined the change in electrical conductivity of pure PEDOT:PSS (about 0.01 S cm –1 ) on a surge in weight percentage (wt%) of Ti 3 C 2 T x in HNC. The electrical conductivity initially improved (≈0.02 S cm –1 at 8%, 0.07 S cm –1 at 15%) and then reduced (≈0.03 at 20% and ≈0.02 at 25%) with the increase in wt% of Ti 3 C 2 T x precursor.…”

“…Furthermore, Jin et al [ 130 ] reported that the rate of weight loss as a function of temperature (in the range of 27 °C to 300 °C) for HNC is slower than that of pure precursor polymer (Figure 10b,c). It is believed to be the result of multielectron interactions among its precursors.…”