Facile preparation and application of magnesium hydroxide assembly spheres

Abstract

Magnesium hydroxide (Mg(OH) 2 ) assembly spheres were successfully synthesized by use of a facile bio-template method, with Mg(NO 3 ) 2 and NaOH solution as reactants. The products were characterized by X-ray diffraction and transmission electron microscopy. The Mg(OH) 2 nanomaterial obtained was assembled from nanoflakes and was approximately 2 lm in total size. Eggshell membrane was crucially important in the process of formation of the assembly spheres. The process and mechanism of assembly of the spheres are discussed. When the Mg(OH) 2 assembly spheres were used to treat waste water containing heavy metals approximately 100 % of copper ions were removed.

Preparation of Mg(OH)2 nanoparticles modified PVDF membranes for efficient dye adsorption and rejection

“…The FTIR spectrum of the Mg(OH) 2 nanoparticles showed the characteristic peaks which were similar to those reported in the literature [37,38]. The sharp peak at 3,698 cm -1 was attributed to the stretching vibration of OH group in Mg(OH) 2 while the flat peak at 3,440 cm -1 belonged to the adsorbed water [39]. Bands in the range of 1,636-1,425 cm -1 were the result of the stretching vibration mode of OH group in water [40].…”

Preparation of molecularly imprinted polymers using theanine as dummy template and its application as SPE sorbent for the determination of eighteen amino acids in tobacco

“…The tobacco was dried at 40°C for 2 h, passed through a 40 mesh sieve, mixed and sealed after use. An ultrasonic extraction method was used to extract the amino acids [52]. One gram tobacco powder samples were placed in 50-mL Erlenmeyer flasks.…”

Controllable microemulsion method for the synthesis of Mg(OH) 2 /PS core–shell structures

“…FT-IR analysis was further carried out to verify the structural composition of Mg(OH) 2 /PS. As shown in Figure 5, the intensities of the FT-IR peaks corresponding to magnesium hydrox- The broad peak at 3427 cm −1 and 1630 cm −1 belongs to the stretching vibration of the absorbed water [27]. Significantly, the new stretch at 2920 cm −1 and 2851 cm −1 can be assigned to asymmetric and symmetric vibration of the C-H, corresponding to polystyrene long chains (-CH 3 and -CH 2 -) [22].…”

“…FT‐IR analysis was further carried out to verify the structural composition of Mg(OH) 2 /PS. As shown in Figure 5, the intensities of the FT‐IR peaks corresponding to magnesium hydroxide, such as the O–H stretching vibration peak at 3702 cm −1 and the Mg–O stretching vibration peak at 435 cm −1 .The broad peak at 3427 cm −1 and 1630 cm −1 belongs to the stretching vibration of the absorbed water [27]. Significantly, the new stretch at 2920 cm −1 and 2851 cm −1 can be assigned to asymmetric and symmetric vibration of the C–H, corresponding to polystyrene long chains (–CH 3 and –CH 2 –) [22].…”