Morphology and photocatalytic activity of TiO2/MXene composites by in-situ solvothermal method

Highly efficient piezoelectric field enhanced photocatalytic performance via in situ formation of BaTiO3 on Ti3C2Tx for phenolic compound degradation

“…After heating to different reaction temperatures, –OH groups promoted the hydrolysis of Ti–O bonds on the Ti 3 C 2 T x surface to form soluble Ti(OH) 4 and Ti(OH) 6 2− complexes, while Ba 2+ and Ba(OH) + ions migrated to the Ti 3 C 2 T x lattice to produce a BaTiO 3 layer on the catalyst surface. 29–31 The elemental distributions depicted in Fig. 1d reveal that the BT-210 piezo-photocatalyst contained Ba, Ti, O, and C elements, and the Ba elemental distribution diagram reflects the distribution of BaTiO 3 nanoparticles.…”

Progress and Challenges of Carbon Dioxide Reduction Reaction on Transition Metal Based Electrocatalysts

“…Aside from the ones discussed above, two-dimensional (2D) forms of transition metal carbides and nitrides, known as MXenes, have been gaining a lot of research attraction for the past decade, due to their unique electronic, mechanical, and optical properties. − The first report on these 2D MXenes was published in 2011 and reported on the Ti 3 C 2 structure . Some of these unique properties can be explained by the way the MXenes are structured, where the transition metal exists as a sheet along the surface layer, rather than being a single atom along the surface. − Current applications of these MXenes materials include fabrics, EMI shielding, HER electrocatalysts, capacitors, and more. − Theoretical calculations have also predicted MXenes to be promising catalysts for CO 2 RR electrocatalysis. − The generic formula of MXenes is M n +1 X n T x , where M is an early transition metal, X is C and/or N, T x is the surface termination group (-F, =O, and/or -OH), and n is any value from 1 to 4. , Xiao and Zhang reported on using DFT calculations to model the effect of changing the M in the MXene structure for CH 4 production . They strictly used M 3 C 2 MXene structures, where M was Sc, Ti, V, Cr, Mn, Y, Zr, Nb, Mo, MoTi, Hf, Ta, or W. Of these, the Y, Sc, Ti, and Ta MXenes were the most promising catalysts since they exhibited preferential activity toward CO 2 RR over HER.…”

Anchoring of Formamidinium Lead Bromide Quantum Dots on Ti3C2 Nanosheets for Efficient Photocatalytic Reduction of CO2

“…Ti 3 C 2 is a typical emerging ultrathin 2D material of the MXene family, which has an excellent metallic conductivity, high volumetric capacity, stable cycling performance, flexible interlayered regulation, and hydrophilic surface. , Inspired by these properties, Ti 3 C 2 as a cocatalyst has been extensively applied in the field of photocatalytic CO 2 reduction, for example, g-C 3 N 4 /Ti 3 C 2 , TiO 2 /Ti 3 C 2 , CeO 2 /Ti 3 C 2 , SiC/Ti 3 C 2 , and Bi 2 WO 6 /Ti 3 C 2 . More recently, Liu et al.…”

“…20 Ti 3 C 2 is a typical emerging ultrathin 2D material of the MXene family, which has an excellent metallic conductivity, high volumetric capacity, stable cycling performance, flexible interlayered regulation, and hydrophilic surface. 21,22 Inspired by these properties, Ti 3 C 2 as a cocatalyst has been extensively applied in the field of photocatalytic CO 2 reduction, 23 for example, g-C 3 N 4 /Ti 3 C 2 , 24 prepared self-assembled CsPbBr 3 nanocrystals on Ti 3 C 2 nanosheets, and this nanostructure obtained efficient charge transfer owing to the conduction band offset (1.5 eV) between these two materials. 15 However, the modest performance in the photocatalytic CO 2 reduction of CsPbBr 3 /Ti 3 C 2 and inferior polar solvent durability of CsPbBr 3 were observed, rendering that the further improvement of this composite was limited.…”