Fabrication of oriented oxide films from exfoliated yttrium hydroxide layers: Enhanced photoluminescence and unexplored behavior of energy transfer

Fabrication of REVO4 films via sacrificial conversion from layered rare-earth hydroxide (LRH) films: the investigation of the transition mechanism and their photoluminescence

“…1a) of the film prepared via electrodeposition revealed a series of (00l) diffractions and (220) diffraction, which are the characteristics of RE 2 (OH) 5 NO 3 •nH 2 O compounds. [17][18][19][20][21][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] The (220) diffraction originated from the [RE 2 (OH) 5 (H 2 O) n ] + host layer of the crystal structure, and the strong and sharp (220) diffraction indicated that the host layers of LYH were well crystallized. Notably, the film exhibited a significantly broadened (002) diffraction and lower intensity ratio of I 220 /I 002 compared with the LRH film synthesized via traditional four-step processing, [34][35][36] implying that the obtained film had low orientation.…”

“…1a) of the film prepared via electrodeposition revealed a series of (00 l ) diffractions and (220) diffraction, which are the characteristics of RE 2 (OH) 5 NO 3 · n H 2 O compounds. 17–21,24–38 The (220) diffraction originated from the [RE 2 (OH) 5 (H 2 O) n ] + host layer of the crystal structure, and the strong and sharp (220) diffraction indicated that the host layers of LYH were well crystallized. Notably, the film exhibited a significantly broadened (002) diffraction and lower intensity ratio of I 220 / I 002 compared with the LRH film synthesized via traditional four-step processing, 34–36 implying that the obtained film had low orientation.…”

“…17,18 LRHs have attracted extensive attention since they were first reported in 2006 owing to the special layered structure and the properties of rare-earth elements, 19 which include interlayer anion exchange, 18,20,21 catalytic performance of intercalated products, 19,22,23 exfoliation of bulk crystals into nanosheets, [24][25][26] photoluminescence, 18,[26][27][28] and enhancement of luminescence. [29][30][31][32][33][34][35][36][37] Also, the self-assembly of functional films is one of the most attractive aspects of LRHs. [38][39][40][41][42][43] The available preparation technology of LRH films generally requires four steps: (1) synthesis of LRH powder; (2) intercalation of bulky long-chain organic anions into the interlayer gallery; (3) exfoliation into individual nanosheets; and (4) selfassembly via layer by layer or Langmuir-Blodgett (LB) techniques.…”

“…[38][39][40][41][42][43] The available preparation technology of LRH films generally requires four steps: (1) synthesis of LRH powder; (2) intercalation of bulky long-chain organic anions into the interlayer gallery; (3) exfoliation into individual nanosheets; and (4) selfassembly via layer by layer or Langmuir-Blodgett (LB) techniques. [34][35][36]41 Obviously, the "four-step" method is timeconsuming; moreover, fragmentation and low yield of nanosheets are usually observed. Recently, REPO 4 materials have been successfully produced using RE 2 (OH) 5 NO 3 •nH 2 O as a sacrificial template.…”

Specific lift-up behaviour of acetate-intercalated layered yttrium hydroxide interlayer in water: application for heterogeneous Brønsted base catalysts toward Knoevenagel reactions

“…S1a †) and ion chromatography (IC). Anion exchange procedures of in the Y-LRH interlayer have been reported, 9,11,14,19,20,38,39,[43][44][45][46][47][48] however, we selected our previously reported procedure using the corresponding sodium salts in water. 36,37 The treatment of Cl…”