Cr3+ substituted Zn-Al layered double hydroxides as UV–Vis light photocatalysts for NO gas removal from the urban environment

Aqueous miscible organic solvent treated NiTi layered double hydroxide De-NOx photocatalysts

“…As a consequence, complete removal of NOx performed by each photocatalyst (De-NOx activity, Fig 5C) is related with its selectivity towards the Photocatalytic Oxidation (PCO) process. Thus, Ni3Ti-E6 samples exhibit De-NOx values around 57%, 29% higher than the one shown using TiO2 P25, being comparable or even superior to those previously reported LDH De-NOx photocatalysts (42%, NiMgAl-LDH; [66] 50%, ZnAl-LDH [31]; 50%, ZnAlCr-LDH [32]; 59%, ZnAlFe-LDH [33]. Moreover, the reusability of the Ni3Ti-E6 and TiO2 P25 photocatalysts was evaluated (Fig.…”

“…Thus, after each run, there are still enough active sites that remain unreacted to keep the De-NOx performance constant. Therefore, the characteristic nitrate passivation of the surface is delayed, whose later appearance should be easily removed by using a simple water washing procedure [31][32][33]. However, the photocatalytic activity of TiO2 P25 was significantly reduced (44%).…”

“…Herein we have developed a novel approach to using a family of layered double hydroxides (LDHs) as efficient De-NOx photocatalysts, working under UV light [31] or even visible light [32,33]. LDHs adopt a brucite-like structure, whose general formula may be expressed as…”

Photodegradation of naproxen using CuZnAl-layered double hydroxides as photocatalysts

“…The results suggested that MCr NO 3 -LDHs (M = Cu, Ni) exhibit 20 times higher photocatalytic activity than P25 as well as excellent recycling ability. 8 Thus, the powerful photocatalytic performance made investigators realize the broad application prospects of LDHs in photocatalysis, such as dyes (rhodamine B, rhodamine 6G), 9 methylene blue degradation, 10,11 NO x gases (NO and NO 2 ) removal, 12 salicylic acid degradation, 13 CO 2 conversion, 14 and pesticide degradation. 15 However, there are few studies on the photocatalytic degradation of PPCPs by LDHs, including but not limited to NPX.…”

CdIn2S4/In(OH)3/NiCr-LDH Multi-Interface Heterostructure Photocatalyst for Enhanced Photocatalytic H2 Evolution and Cr(VI) Reduction

“…As shown in Figure5a, CIS-4 exhibited strong absorption until the wavelength reached around 570 nm. NiCr-LDH could respond to a wider solar spectrum, with two broad absorption bands in the visible region between 330-480 nm and 490-850 nm, which are associated with the d-d transitions of metal ions distributed in the 2D hydroxide layers of LDH[51,56]. The CdIn 2 S 4 /In(OH) 3 /NiCr-LDH heterostructure photocatalyst not only had strong light absorption up to 530 nm, similar to that of CdIn 2 S 4 , but also exhibited an absorption band in the region of 530-850 nm, which was consistent with NiCr-LDH.…”