Magnetically separable attapulgite−TiO2−FexOy composites with superior activity towards photodegradation of methyl orange under visible light radiation

Jiahui Zhang,Lili Zhang,Shouyong Zhou,Haiqun Chen,Hui Zhong,Yijiang Zhao,Xin Wang 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.5

A magnetically recoverable composite photocatalyst was obtained by introducing TiO2–FexOy hybrid oxide onto the surface of attapulgite via an in-situ deposit technique (marked as ATT–TiO2–FexOy-r, r represents molar ratio of r = nTi/(nTi + nFe)). The obtained composites were carefully characterized and results showed TiO2–FexOy particles with an average size of 10 nm were successfully loaded onto attapulgite fibers’ surface. The FexOy (mixture of Fe2O3 and Fe3O4) acted not only as magnetic source but also took part in the formation of TiO2–Fe2O3 heterojunction structure, which resulted in the obvious absorption in visible light region for the obtained ATT–TiO2–FexOy. The obtained ATT–TiO2–FexOy-r exhibited quite good catalytic activity towards photodegradation of methyl orange under visible light irradiation. The highest degradation ratio and COD removal of methyl orange reached to 94.13% and 90.91% for ATT–TiO2–FexOy-0.5. Moreover, ATT–TiO2–FexOy could be readily recovered and the degradation ratio maintains 83.89% after 5 cycles. Possible mechanism for this enhancement was proposed.

A COST-EFFECTIVE MAGNETIC PHOTOCATALYST PALYGORSKITE – TiO 2 – Fe x O y WITH EXCELLENT PERFORMANCE FOR DYE PHOTODEGRADATION UNDER VISIBLE LIGHT

JIAHUI ZHANG,Lili Zhang,JIN HUANG,Shouyong Zhou,Haiqun Chen,WEIGUANG ZHANG,Xin Wang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2014 NANO Vol.9 No.6

Palygorskite (denoted as Pal) was used as an economical carrier of hybrid photocatalystTiO 2 – FexOy via an in situ depositing technique (marked as Pal – TiO 2 – FexOy). The samples werecharacterized by X-ray di®raction (XRD), transmission electron microscopy (TEM), brunner-emmet-teller (BET) measurements, X-ray photoelectron spectroscopy (XPS) and UV-Vis di®usere°ectance spectra measurements. Results showed that TiO 2 – FexOy composite particles withaverage size of about 10 nm were loaded onto the Pal ¯bers' surface. FexOy acted not only asmagnetic source but also took part in the formation of TiO 2 – FexOy heterojunction structure, which resulted in the obvious absorption in visible light region for the obtained Pal – TiO 2 – FexOy com-posite photocatalyst. The obtained Pal – TiO 2 – FexOy shows excellent photocatalytic activity to-ward photodegradation of Methyl orange (MO) under visible light irradiation and the degradationratio reached 94% within 180 min. Moreover, Pal – TiO 2 – FexOy could be readily recovered from thereaction solution by the magnet. Possible mechanism for the enhancement was also proposed.

Association analysis of the SNP (rs345476947) in the FUT2 gene with the production and reproductive traits in pigs

Haifei Wang,Sen Wu,Jiayun Wu,Shouyong Sun,Shenglong Wu,Wen Bin Bao 한국유전학회 2018 Genes & Genomics Vol.40 No.2

The FUT2 gene was considered as an important candidate for pathogenic infections, while the potential associations between this gene and the production and reproductive traits of pigs have not been explored. In this study, we detected the genetic variants of porcine FUT2 gene and analyzed the associations of the polymorphisms with FUT2 mRNA expression and production and reproductive traits (age at 100 kg, backfat thickness at 100 kg, eye muscle thickness, the number of newborn piglets, the number of weaned piglets, and birth weight) in 100 Large White sows. One single nucleotide polymorphism (SNP) (rs345476947, C→T) in the intron of FUT2 and three genotypes (TT, CT and CC) were determined. Association analysis revealed significant associations between this SNP with the number of newborn piglets and weaned piglets. Furthermore, individuals with the TT genotype had significantly higher numbers of newborn piglets and weaned piglets than those with the CC genotype (P < 0.05). Quantitative PCR analysis showed that FUT2 expression in individuals with CC genotype was significantly higher than those with TT and CT genotypes in the liver and lymph gland (P < 0.05) and higher than that of CT in the spleen, kidney, and duodenum (P < 0.05). These findings indicated that the TT genotype may be a favorable genotype for the reproductive traits of pigs. Our study revealed the genetic variants of the FUT2 gene and identified a promising candidate SNP (rs345476947) associated with the reproductive traits, which has the potential to be applied in selective breeding of pigs.

Efficient hydrolysis of cellulose over a magnetic lignin-derived solid acid catalyst in 1-butyl-3-methylimidazolium chloride

Lei Hu,Zhen Wu,Jiaxing Xu,Shouyong Zhou,Guodong Tang 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.4

A green and efficient strategy for the hydrolysis of cellulose was developed by using a magnetic lignin-derived solid acid catalyst (MLC-SO3H) in the presence of ionic liquid 1-butyl-3-methylimidazolium chloride ([BMIM]Cl). The results indicated that reaction temperature, reaction time, catalyst loading and water content have a big influence on the yield of total reducing sugars (TRS). By optimizing these reaction parameters, 69.3% TRS yield was observed at 140 oC for 150 min with the addition of 40 wt% MLC-SO3H and 1 wt% water. More importantly, MLC-SO3H could be easily separated from the reaction mixture with an external magnet and could be repeatedly used five times without an obvious loss of catalytic activity, demonstrating that it possessed excellent recyclability. Furthermore, a plausible mechanism involving three consecutive processes of dissolution, adsorption and catalysis for the hydrolysis of cellulose in [BMIM]Cl over a catalyst of MLC-SO3H was also proposed.

Construction of polysulfone anion exchange hybrid membranes by incorporating carbon quantum dots and facilitated transport mechanisms

Yuan Jin,Xiu Zhang,Tianci Feng,Mei-Sheng Li,Huifang Xiao,Shouyong Zhou,Yijiang Zhao,Jing Zhong,Dawei Yang 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.115 No.-

Low ion conductivity and poor alkali resistance are still the two major obstacles for the applications ofanion exchange membranes (AEMs). In this work, the combined strategies of Carbon quantum dots(CQDs) hybrid and cross-linking modification via side-chains designing were employed to prepareorganic–inorganic hybrid AEMs. Then, the cross-linked quaternized polysulfone (CQPSf-CQDs) hybridAEMs by incorporating carbon quantum dots were successfully fabricated. After hybrid and crosslinking,the mechanical properties of CQPSf-CQDs hybrid AEMs were higher than that of the pristineone, reaching 49.4 MPa for the best one. Meanwhile, the existence of CQDs can expand the hydrophilicarea in the membrane, which is beneficial to the transport of OH. The incorporated CQDs interact weaklywith cationic groups in the side chains through hydrogen bonds. The simulation results further demonstratedthat the introduction of CQDs was beneficial to the construction of hydrophilic and hydrophobicdomains, thereby increasing OH conductivity. In addition, the prepared hybrid membranes own excellentdimensional stabilities and ion transport performances. These preliminary results give us a lot ofhopes for further experiments and optimizations for the hybrid AEMs.

Selective transformation of biomass-derived 5-hydroxymethylfurfural into 2,5-dihydroxymethylfuran via catalytic transfer hydrogenation over magnetic zirconium hydroxides

Lei Hu,Mei Yang,Ning Xu,Jiaxing Xu,Shouyong Zhou,Xiao-Zhong Chu,Yijiang Zhao 한국화학공학회 2018 Korean Journal of Chemical Engineering Vol.35 No.1

An economical and effective approach for the selective transformation of biomass-derived 5-hydroxymethylfurfural (HMF) into 2,5-dihydroxymethylfuran (DHMF) was developed by catalytic transfer hydrogenation over various magnetic zirconium hydroxides (MZHs). As expected, MZH with a moderate Zr/Fe molar ratio of 2 displayed the highest catalytic activity, resulting in 98.4% HMF conversion and 89.6% DHMF yield at 150 oC for 5 h in the presence of 2-butanol that simultaneously acted as the hydrogen donor and reaction solvent, which was ascribed to its appropriate specific surface area, pore size and acid-base content. Moreover, a plausible reaction mechanism for the catalytic transfer hydrogenation of HMF into DHMF over MHZ(Zr/Fe=2) was also proposed, in which the basic hydroxyl groups with the aid of acidic zirconium metal centers were considered to be responsible for the pivotal hydride transfer via a six-membered ring structure.