Oxygen vacancy mediated step-scheme heterojunction of WO2.9/g-C3N4 for efficient electrochemical sensing of 4-nitrophenol

Insight into the rapid degradation of antibiotic rifampicin by W-doped O-bridged g-C3N4via the coupling effect of electron replenishment in the dark degradation stage and electrophilic attack in the photocatalytic stage: experiments and DFT simulation calculations

“…1h). Moreover, there is an obvious absorption peak of O–W at 530.4 eV in WOCN 6 -2; 49 thus it is inferred that the N–W–O bond may be formed in thermal polycondensation. Once the W atom enters the triazine structure of g-C 3 N 4 , its valence state will have an important effect on the electrostatic potential and electron cloud density distribution of the doping molecular system.…”

“…However, there are still several significant changes in the functional groups of WOCN y - x . Firstly, a series of new peaks appeared in the range between 600 cm −1 and 900 cm −1 , corresponding to the stretching vibrations of W–O at 878 cm −1 , 737 cm −1 , and 678 cm −1 , 47–49 and W–N at 837 cm −1 and 806 cm −1 , 50 implying that the W atom is successfully doped into the triazine ring of g-C 3 N 4 . The comparison of WOCN y -2 indicates that the absorption peak signal intensity of the sample fabricated by high pressure ball grinding is stronger, suggesting that ball milling is beneficial for the doping of the W atom into the carbon nitride skeleton.…”

Three-dimensional MXenes heterostructures and their applications

“…Due to the unrivaled micro-structures and characteristics, twodimensional (2D) materials have aroused intense interest ever since the discovery of graphene in 2004 [1,2], and many other 2D materials have been emerging, including hexagonal boron nitrides (h-BN) [3], transition metal dichalcogenides (TMDs) [4][5][6][7][8], metal oxides hydroxides [9], graphitic carbon nitride [10][11][12], phosphorene [13,14], and tellurene [15]. In 2011, researchers at Drexel University discovered a new family of 2D transition metal carbides and nitrides, also known as MXenes, which have drawn wide increasing attention [16].…”