In situprotonated-phosphorus interstitial doping induces long-lived shallow charge trapping in porous C_3−xN₄photocatalysts for highly efficient H₂generation

Abstract

Efficient photocatalytic solar-to-H2 conversion is pivotal to zero-carbon energy supply. Graphitic carbon nitride (g-C3N4) is a promising visible-light photocatalyst but suffers from intrinsic electron-hole recombination and deep-charge trapping, limiting its...

Kinetically and Thermodynamically Favorable Ni–Al Layered Double Hydroxide/Ni-Doped Zn0.5Cd0.5S S-Scheme Heterojunction Triggering Photocatalytic H2 Evolution

“…For PL spectra, the lower PL intensity indicates the higher rate of carrier separation. As shown in Figure d, the PL intensity of 15% LDH/1% Ni-ZCS is lower than that of 1% Ni-ZCS and ZCS, suggesting that Ni doping and the introduction of LDH are beneficial to suppress the recombination of photogenerated carriers. , The accelerated charge transfer in 15% LDH/1% Ni-ZCS is also proven by the increased photocurrent response (Figure e) and small semicircle in EIS (Figure f). , The charge transfer resistance across the electrode/electrolyte ( R ct ) value of 15% LDH/1% Ni-ZCS (5638 Ω) is obviously lower than those of ZCS (12375 Ω) and 1% Ni-ZCS (9335 Ω), which also indicates that 15% LDH/1% Ni-ZCS will suppress the rapid recombination of carriers. In short, all of these results confirmed that the improved charge separation and transfer for further enhanced PHE activity in 15% LDH/1% Ni-ZCS.…”

“…50,51 The accelerated charge transfer in 15% LDH/1% Ni-ZCS is also proven by the increased photocurrent response (Figure 4e) and small semicircle in EIS (Figure 4f). 52,53 The charge transfer resistance across the electrode/electrolyte (R ct ) value of 15% LDH/1% Ni-ZCS (5638 Ω) is obviously lower than those of ZCS (12375 Ω) and 1% Ni-ZCS (9335 Ω), which also indicates that 15% LDH/1% Ni-ZCS will suppress the rapid recombination of carriers. In short, all of these results confirmed that the improved charge separation and transfer for further enhanced PHE activity in 15% LDH/1% Ni-ZCS.…”

Metal Ion Coordination Improves Graphite Nitride Carbon Microwave Therapy in Antibacterial and Osteomyelitis Treatment

“…X‐ray diffraction shows that CN has a strong diffraction peak at 27.4 o , indicating an interlayer spacing of 0.33 nm and a crystal plane (002) (Figure 1e). [ 26 ] The diffraction intensity of BZCN after the second calcination was lower than that of CN, indicating that the calcination crystallinity decreased after Zn 2+ doping. Another peak at 13 o (100) reflects the in‐plane structure of the tri‐s‐triazine unit, and its characteristic peak intensity decreases, indicating that the interaction between CN and Zn 2+ may alter the structure of the nitrogen ring and the hole‐to‐hole distance.…”

The multiple roles of rare earth elements in the field of photocatalysis

“…The combination of two semiconductor materials with different band structures will form a potential difference, and the electrons generated by light excitation will be transferred from one semiconductor to another semiconductor, effectively separating electrons and holes. [67][68][69][70][71][72] For example, Zhang's team co-doped Yb 3+ and Er 3+ on BiOBr and complexed it with Bi 4 O 5 I 2 to form a Z-type heterojunction catalyst for twodimensional materials. 73 The catalyst exhibited excellent per-formance in degrading BPA under full-spectrum and NIR light irradiation.…”