Molecular oxygen activation enhancement by BiOBr0.5I0.5/BiOI utilizing the synergistic effect of solid solution and heterojunctions for photocatalytic NO removal

Ultrafast synthesis of near-zero-cost S-doped Ni(OH)2 on C3N5 under ambient conditions with enhanced photocatalytic activity

“…˙OH, ˙O 2 − and 1 O 2 ) play the main role in the procedure of photocatalytic NO oxidation. 61–63 In addition, photogenerated h + residual in the VB of the semiconductor is also of great importance. 64,65 Thus, the photocatalytic NO removal performance of 1.0 wt% S–Ni(OH) 2 –C 3 N 5 in the presence of a series of trapping agents for different active species is compared in Fig.…”

“…and adsorbed O 2 , while the reaction between cO 2 À and h + can generate1 O 2 3,61. cOH should originate from the oxidization of H 2 O by cO 2 À since the VB position of C 3 N 5 cannot satisfy the requirement of cOH generation based on our previous work 33,66.…”

Noble-Metal-Free NixSy-C3N5 Hybrid Nanosheet with Highly Efficient Photocatalytic Performance

“…Electron spin resonance (ESR) spectra were recorded to monitor the formation of the main active species of •O2 − and 1 O2. As revealed in Figure 9b,c, characteristic signals for DMPO-•O2 − and TEMPO (product of TEMP oxidized by 1 O2) were detected [42][43][44], and the signal intensity for NixSy-C3N5 was higher than that of pristine C3N5 under light irradiation, demonstrating that greater amounts of ROS can be generated on the NixSy-C3N5 hybrid. The result of the EPR analysis is in good agreement with the results of the photocatalytic performance.…”

“…As can be seen in Figure 9a, the photocatalytic NO removal efficiency is inhibited to different extents when different trapping agents are added, demonstrating that all of the above-mentioned species can participate in the procedure for NO removal. In addition, the dominant species are − and TEMPO (product of TEMP oxidized by 1 O 2 ) were detected [42][43][44], and the signal intensity for Ni x S y -C 3 N 5 was higher than that of pristine C 3 N 5 under light irradiation, demonstrating that greater amounts of ROS can be generated on the Ni x S y -C 3 N 5 hybrid. The result of the EPR analysis is in good agreement with the results of the photocatalytic performance.…”

Manipulating Excitonic Effects in Layered Bismuth Oxyhalides for Photocatalysis

“…When the concept of excitons is introduced, our conventional understanding of photoexcitation processes that involve the generation, separation, and migration of charge carriers is deemed not comprehensive for 2D materials. For instance, for the carrier-dominated photocatalytic reactions, competitive production of excitons will restrict the conversion of absorbed photons into free electrons and holes, leading to significantly reduced photocatalytic efficiency. − However, the excitonic effects in 2D photocatalysts have not been fully acknowledged or explored. Thus, revealing the excitonic effects will offer us new perspectives on the mechanisms of photocatalysis and open new vistas for establishing highly efficient solar energy harvesting systems. ,, In this context, we would like to compose this review to present our critical understanding of this research area, focusing on recent endeavors to manipulate exciton behaviors for environmental applications with bismuth oxyhalide as the platform.…”