Controlling the secondary pollutant on B-doped g-C₃N₄ during photocatalytic NO removal: a combined DRIFTS and DFT investigation

Abstract

The mechanisms of enhanced photocatalysis efficiency and suppression of toxic intermediate production during photocatalytic NO oxidation on B-doped g-C3N4 were revealed.

Barium- and Phosphorus-Codoped g-C3N4 Microtubes with Efficient Photocatalytic H2 Evolution under Visible Light Irradiation

“…The XPS spectrum of C 1s in Figure 3a can be fitted at 287.9, 285.8, and 284. tively. 34 The N 1s spectrum in Figure 3b After Ba and P atom doping, the area of hysteresis loop increases significantly, which shows that Ba and P atom doping can significantly increase the number of mesopores of g-C 3 N 4 , which is consistent with the SEM results. The doping of Ba and P atoms significantly increases the specific surface area of g-C 3 N 4 , so that the catalyst surface can provide more active sites to accelerate the catalytic reaction.…”

“…The smaller arc radius of the EIS spectrum indicates better efficiency for the photoinduced electron transfer at the electrodes. , Figure c shows similar semicircular Nyquist plots for CN, Ba–CN, P–CN, and Ba–PCN. It demonstrates that the EIS arc radius of Ba–CN, P–CN, and Ba–PCN is significantly smaller than that of CN, corresponding to smaller charge-transfer impedance.…”

“…The XPS spectrum of C 1s in Figure a can be fitted at 287.9, 285.8, and 284.4 eV, corresponding to sp 2 -hybridized N–CN, C–NH 2 of intermediate compound with incomplete polycondensation, graphite C–C or CC, respectively . The N 1s spectrum in Figure b can be fitted into three typical peaks at 398.4, 399.7, and 400.8 eV, indicating the presence of the sp 2 -bonded N atom (C–NC) in the N-containing aromatic ring, the sp 3 -hybridized tertiary group (N–[C] 3 ), and the N atom (C–NH x ) at the end of the incompletely condensed aromatic ring, respectively. , The C 1s component for the sp 2 -hybridized C atom (N–CN) shifts toward higher binding energy upon Ba and P doping. It is speculated that the Ba atom dopes into the triangular vacancy of the periodic structure of the planar aromatic ring, and the P atom may replace the C atom in the C–N framework structure of the aromatic ring to form N–P.…”

Photocatalytic Performance and Degradation Pathway of Rhodamine B with TS-1/C3N4 Composite under Visible Light

“…The XRD patterns of all the materials are shown in Figure 1a. For C 3 N 4 , the peaks at 13.0 and 27.4 • correspond to (100) and (002) planes of g-C 3 N 4 , respectively [38] (JCPDS Card No. 87-1526).…”

Facile synthesis of B/g-C3N4 composite materials for the continuous-flow selective photo-production of acetone

“…Moreover, no clear evidence of boron incorporation was found by XRD analysis, although the mild decrease in crystallinity may be associated with it. 32,33 Such a result is further discussed in the following paragraphs.…”