Graphene oxide mediated co-generation of C-doping and oxygen defects in Bi₂WO₆nanosheets: a combined DRIFTS and DFT investigation

Abstract

The co-generation of C-doping and oxygen vacancies (OVs) in Bi2WO6 nanosheets was achieved by a graphene oxide-mediated hydrothermal method. The photocatalytic performance was highly promoted in NO removal with the synergistic effects of C-doping and OVs.

Construction of CoS/CeO2 heterostructure nanocages with enhanced photocatalytic performance under visible light

“…Nitrogen adsorption‐desorption isotherms were recorded to resolve the structural characteristics of CCNC‐0.1, CoS nanocage, and the results are further shown in Figure 5A,B. The adsorption curves of all the samples are compatible with the adsorption behavior of the type IV isotherm, followed by the H3 hysteresis loop, implying the successful manufacture of the mesoporous structure in the as‐synthetic sample 49,50 . Obviously, the prepared CCNC‐0.1 sample maintains the higher specific surface area and pore size (Seen in Table 1).…”

Bi quantum dots implanted 2D C-doped BiOCl nanosheets: Enhanced visible light photocatalysis efficiency and reaction pathway

“…In situ DRIFTS measurements were carried out on a Tensor II FT-IR spectrometer (Bruker, GER), which equipped with an in situ diffuse reflectance cell [24]. In a typical testing process, photocatalyst was put into the reaction cell.…”

“…Elemental doping is one of the most efficient routes to improve the photocatalytic performance of BOC, mostly through narrowing the bandgap and restraining the recombination of photo-excited carriers [20][21][22][23]. Compared to diverse doping strategies, C doping is regarded as a promising approach to improve the photocatalytic activity of BOC by promoting photo-generated charge separation, directional transfer [24] and UV-response photocatalytic activity [25]. However, the actual performance of these C doped BOC (labeled as C/BOC) under visible light irradiation is still far from practical application owing to the intrinsic inferior quantum efficiency of BOC.…”

Recent progress in Bi2WO6‐Based photocatalysts for clean energy and environmental remediation: Competitiveness, challenges, and future perspectives

“…[ 114 ] C doping could change the pathway when transferring photogenerated charges and suppress the recombination of photogenerated carriers. [ 117 ] Oxygen vacancies were generated simultaneously to facilitate the adsorption and activation of O 2 , which led to the more efficient formation of reactive •O 2 − . In summary, there are many ways to introduce oxygen vacancies, such as doping, hydrothermal, reduction, and postsynthetic etching treatments.…”

“…Additionally, we deeply illustrate and analyze the connections between the morphological, photophysics and photochemical properties of Bi 2 WO 6 , which include dopant or defect structures, metal deposition techniques, semiconductor combinations and surface modification by carbon‐based materials with conjugated π‐structures. [ 39–181 ] We critically review the practical applications of water splitting, pollutant removal, and especially CO 2 reduction. These aspects reflect the research status of Bi 2 WO 6 , as well as its potential and opportunities in the field of clean energy and environmental protection.…”