Merck
  • Home
  • Search Results
  • A facile hydrothermal approach to the synthesis of nanoscale rare earth hydroxides.

A facile hydrothermal approach to the synthesis of nanoscale rare earth hydroxides.

Nanoscale research letters (2015-04-09)
Chengyin Li, Hui Liu, Jun Yang
ABSTRACT

Nanosized rare earth (RE) hydroxides including La(OH)3, Nd(OH)3, Pr(OH)3, Sm(OH)3, Gd(OH)3, and Er(OH)3 with rod-like morphology are fabricated via a convenient hydrothermal approach. This strategy calls for the first preparation of metal complexes between RE precursors and dodecylamine (DDA) in water/ethanol mixture at room temperature and subsequent thermal decomposition at elevated temperature. The influence of reaction time and water/ethanol volume ratios on the morphology and size of as-prepared RE hydroxides are investigated. CeO2 nanoparticles with spherical shape could be directly obtained by hydrothermal treatment of complexes formed between Ce precursors and DDA. In addition, by further calcinating the RE hydroxides at high temperature in air, RE oxide nanorods could be readily produced.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
纯乙醇, 200 proof, for molecular biology
Sigma-Aldrich
纯乙醇, 200 proof, anhydrous, ≥99.5%
Sigma-Aldrich
纯乙醇, 200 proof, ACS reagent, ≥99.5%
Sigma-Aldrich
乙醇, BioUltra, for molecular biology, ≥99.8%, (absolute alcohol, without additive, A15 o1)
Sigma-Aldrich
纯乙醇, 200 proof, HPLC/spectrophotometric grade
Sigma-Aldrich
纯乙醇, 190 proof, ACS spectrophotometric grade, 95.0%
Sigma-Aldrich
纯乙醇, 190 proof, for molecular biology
Sigma-Aldrich
纯乙醇, 190 proof, meets USP testing specifications
Sigma-Aldrich
纯乙醇, 200 proof, meets USP testing specifications
Supelco
乙醇, standard for GC
Sigma-Aldrich
乙醇, for residue analysis
Supelco
无水乙醇, Pharmaceutical Secondary Standard; Certified Reference Material
Sigma-Aldrich
乙醇, ACS reagent, prima fine spirit, without additive, F15 o1
Sigma-Aldrich
乙醇, purum, absolute ethanol, denaturated with 4.8% isopropanol, A15 IPA1, ≥99.8% (based on denaturant-free substance)
Sigma-Aldrich
十二胺, ≥99%
Sigma-Aldrich
十二胺, 98%
Sigma-Aldrich
乙醇, tested according to Ph. Eur.
Supelco
Ethanol 溶液, certified reference material, 2000 μg/mL in methanol
Sigma-Aldrich
N,N-二甲基十二烷基胺, 97%
Supelco
10% (v/v) 乙醇标准品, 10 % (v/v) in H2O, analytical standard
Sigma-Aldrich
乙醇, puriss. p.a., absolute, ≥99.8% (GC)
Sigma-Aldrich
乙醇, purum, secunda spirit, denaturated with 2% 2-butanone and 0.5% 4-methyl-2-pentanone, S15, ~96% (based on denaturant-free substance)
Sigma-Aldrich
乙醇, purum, fine spirit, denaturated with 2% 2-butanone, F25 MEK1, ~96% (based on denaturant-free substance)
Sigma-Aldrich
乙醇, purum, absolute ethanol, denaturated with 2% 2-butanone, A15 MEK1, ≥99.8% (based on denaturant-free substance)
USP
无水酒精, United States Pharmacopeia (USP) Reference Standard
Sigma-Aldrich
乙醇, purum, absolute ethanol, denaturated with 1% cyclohexane, A15 CYCLO1, ≥99.8% (based on denaturant-free substance)
Sigma-Aldrich
乙醇, purum, fine spirit, denaturated with 4.8% methanol, F25 METHYL1, ~96% (based on denaturant-free substance)
Sigma-Aldrich
十二胺, puriss., ≥99.5% (GC)
Sigma-Aldrich
80% v/v 乙醇固定液, suitable for fixing solution (blood films)
Sigma-Aldrich
铒, ingot, 99.9% trace rare earth metals basis