Creation and modulation of ferromagnetism in antiferromagnetic hematite nanoplates

Li, Jiayi; Wang, Zihan; Li, Sen; Chu, Ye; Gao, Daojiang; Wu, Jiangtao; Zhao, Guijuan; Ye, Zuo‐Guang

doi:10.1039/d3tc00060e

Cited by 2 publications

(1 citation statement)

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“…With the increase of added NaCl concentrations (m Na s (g L À 1 , NaCl/solvent)), photoactivity of PHIÀ be increases then decreases, reaching the maximum (R H = 462 μmol h À 1 ) at m Na = 62.5 g L À 1 (Figure 4c and d). The increase of R H s should result from participation of Cl À ions in surface photooxidation reactions, [7,22] while the decrease of R H s likely stems from the high-concentration NaCl (a strong screening effect of ions) that induced agglomeration of particles (Figure S23) to decrease photoabsorption and exposed surface-active sites. The AQYs of PHIÀ be at 420 nm can reach 41.5 and 23.5 % at m Na s of 62.5 and 187.5 g L À 1 , respectively (Figure 4b).…”

Section: Forschungsartikelmentioning

confidence: 99%

Stability and Crystallinity of Sodium Poly(Heptazine Imide) in Photocatalysis

Deng,

Li,

et al. 2023

Angewandte Chemie

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Poly(heptazine imide) (PHI) salts, as crystalline carbon nitrides, exhibit high photocatalytic activity and are being extensively researched, but its photochemical instability has not drawn researchers’ attention yet. Herein, sodium PHI (PHI‐Na) ultrathin nanosheets with increased crystallinity, synthesized by enhancing contact of melamine with NaCl functioning as a structure‐induction agent and hard template, exhibits improved photocatalytic hydrogen evolution activity, but low photochemical stability, owing to Na+ loss in the photocatalytic process, which, interestingly, can be enhanced by the common ion effect, e.g., addition of NaCl that is also able to remarkably increase the photoactivity with the apparent quantum yield at 420 nm reaching 41.5%. This work aims at attracting research peers’ attention to photochemical instability of PHI salts and provides a way to enhance their crystallinity.

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Section: Forschungsartikelmentioning

confidence: 99%