One-step in-situ preparation of N-doped TiO2@C derived from Ti3C2 MXene for enhanced visible-light driven photodegradation

Chlorosome‐Like Molecular Aggregation of Chlorophyll Derivative on Ti3C2Tx MXene Nanosheets for Efficient Noble Metal‐Free Photocatalytic Hydrogen Evolution

“…MXenes are a new family of 2D nanostructured materials originally reported in 2011. [ 23 ] The excellent electrochemical properties of MXenes make them widely applicable for electromagnetic interference shielding, [ 24–25 ] photodegradation, [ 26 ] photovoltaics, [ 27–28 ] electrochemical catalysis, [ 29 ] supercapacitors, and lithium ion batteries. [ 30–32 ] MXenes are prepared from MAX phases by etching the A layer (usually Al or Si) with a strong acid solution such as HF or LiF/HCl.…”

Facile synthesis of C, N-TiO2 nanorods via layered Ti 3 O 7 2 − -TMAH interlaminar bonding interaction and their enhanced catalytic performance

“…As shown in figure 4(b), the N 1s spectrum included two secondary peaks, which were located at 399.6 and 400.5 eV, corresponding to the N-Ti-O and N-C, respectively. The characteristic peak at 402.36 eV was related to the fragments of C and N molecules, which might be the residual organic molecule fragments of quaternary ammonium [10,29,30]. Moreover, in figure 4(c), the O 1s displayed three peaks at 529.5, 529.9 and 530.8 eV corresponding to Ti 4+ -O, Ti-OH and N-Ti-O bonds, respectively.…”

“…As indicated in figure 4(a), the C 1s consisted of four characteristic peaks. And the binding energies at 284.6, 285.2, 286.0 and 288.4 eV were vested in C-C, C-N, C-OH and C=O bonds, respectively, indicating that the catalyst contained C and N elements [30]. As shown in figure 4(b), the N 1s spectrum included two secondary peaks, which were located at 399.6 and 400.5 eV, corresponding to the N-Ti-O and N-C, respectively.…”

“…Ti-OH bonds on the surface of TiO 2 promoted the formation of ·OH during photocatalytic reaction [29,30]. The Ti 2p spectrum ( figure 4(d)) was split into four peaks at 458.2, 458.6, 463.7 and 464.4 eV which belonged to Ti 3+ 2p 3/2 , Ti 4+ 2p 3/2 , Ti 3+ 2p 1/2 and Ti 4+ 2p 1/2 bonds, respectively [10,29,30]. In addition, the atomic percentage of the catalyst elements obtained by XPS is shown in table 1.…”

“…Non-metallic of C and N elements doping can introduce impurity levels around at O 2p band level. It can inhibit the recombination of photon-generated carriers, which can effectively increase the electrons and holes used in the radical reaction [30,[35][36][37]. However, excessive N element doping would inhibit the catalytic rate, as shown in figure S2.…”