Soft-template induced synthesis of high-crystalline polymeric carbon nitride with boosted photocatalytic performance

Abstract

Activity of polymeric carbon nitride (PCN), a promising photocatalyst for industrial application, is restricted seriously by low crystallinity. Herein, a soft-template induction strategy was proposed to synthesize PCN with highly...

Single-atom cobalt-hydroxyl modification of polymeric carbon nitride for highly enhanced photocatalytic water oxidation: ball milling increased single atom loading

“… 14 Because of several self-deficiencies including fast photogenerated charge recombination and a narrow optical absorption spectrum, PCN exhibits relatively low photocatalytic activity. 15 Then, a series of strategies were put forward successively to enhance the photoactivity of PCN, such as enhancement of crystallinity, 16 morphological control, 17 structural modification 18 (including extensively researched single atom modification in recent years 19,20 ), exfoliation, 21 construction of hetero-(homo-)junctions, 22 and loading of noble metals. 23 Though photocatalytic water splitting on PCN was extensively researched in the past, the research was mainly around the hydrogen evolution half-reaction used for exploring properties and the catalytic mechanism of photocatalysts, and little research was focused on the industrially useable overall water splitting process owing to the sluggish OER.…”

Flux-Assisted Low Temperature Synthesis of SnNb2O6 Nanoplates with Enhanced Visible Light Driven Photocatalytic H2-Production

“…On the other hand, a series of dispersive diffraction rings was observed from the corresponding SAED pattern, indicating the polycrystalline feature of the SnNb 2 O 6 nanoplates. It is widely accepted that high crystallinity can avoid the formation of grain boundaries and/or other interfaces, which may act as recombination centers. − Additionally, the HAADF-STEM image and EDX elemental mapping (Figure c) showed a homogeneous distribution of Sn, Nb, and O elements, suggesting the successful preparation of SnNb 2 O 6 nanoplates.…”

Ion-Induced Synthesis of Crystalline Carbon Nitride Ultrathin Nanosheets from Mesoporous Melon for Efficient Photocatalytic Hydrogen Evolution with Synchronous Highly Selective Oxidation of Benzyl Alcohol

“…As shown in Figure 3g, PCN exhibits two peaks at chemical shifts of 164.1 and 156.4 ppm, corresponding to C− NH x and N−CN, respectively. 13,21 Two peaks are also observed in the spectra of cMel, PHI, and cMel-5, but cMel-5 exhibits an additional peak at a chemical shift of 171.8 ppm, probably corresponding to C−NCN − , and this peak is ambiguous for PHI owing to its much lower NCN − content (see the FT-IR spectra in Figure S21). Enlarged spectra show ∼0.4 ppm movement of the "N−CN" peak of cMel at a high chemical shift, relative to that of PCN, and this arises from formed C−SO with its peak overlapping with that of N− CN.…”