Article
Chemistry, Physical
Kui Wu, Fengtao Chen, Feng Wang, Yanping Huang, Zhigang Shen, Weiyan Wang, Yunquan Yang
Summary: In this study, Pt supported on Mg-Al oxide catalysts were prepared to enhance the hydrogen evolution rate in the dehydrogenation of methylcyclohexane (MCH). The effects of the co-precipitation reaction time during the preparation of Mg-Al hydrotalcite on their structural properties were studied, showing increased pore diameter and Pt dispersion with prolonged reaction time. The resultant catalysts exhibited high activity and stability in the dehydrogenation process.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Environmental
Ziying Chen, Zhujian Huang, Junhong Liu, Enya Wu, Qian Zheng, Lihua Cui
Summary: Nanoplastics, an emerging pollutant, have attracted global attention. The use of Mg/Al-layered double hydroxides (LDH) for flocculation shows potential for removing PSNP. The study reveals that LDH can capture PSNP under different pH conditions, with removal efficiencies over 90.0%.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Applied
Shanshan Miao, Zhentao Luo, Shujuan Tan, Tong Xu, Zhuoting Zhou, Guangyuan Feng, Guoyue Xu, Guangbin Ji
Summary: This study develops stealth coatings with Mg-Al layered double hydroxide films, which achieve the same color and spectrum as green vegetation and demonstrate excellent weather resistance. It provides new insights into the application of hyperspectral materials in biomimetic camouflage.
PROGRESS IN ORGANIC COATINGS
(2024)
Article
Chemistry, Physical
Guangze Nie, Lirui Wu, Shijun Qiu, Zhengwen Xu, Hailing Wang
Summary: Efficient removal of phosphate is crucial for addressing eutrophication. A millimeter-sized nanocomposite, MgAl-201, was developed by impregnating Mg/Al LDH nanosheets into a polystyrene anion exchanger. MgAl-201 exhibited excellent adsorption performance and chemical stability in a wide pH range. It showed great potential for phosphate removal from neutral contaminated waters and achieved a treatable volume 8 times that of traditional anion exchangers.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Munjeong Jang, Subin Choi, Yoondo Kim, Junyoung Cha, Ah-Reum Kim, Hyangsoo Jeong, Yongmin Kim, Sun Hee Choi, Suk Woo Nam, Jongwoo Lim, Chang Won Yoon, Hyuntae Sohn
Summary: A highly reducible CeO2 surface was prepared on a SiO2 support to investigate the effect of redox properties of CeO2 on the catalytic activity of Pt/CeO2-SiO2 for MCH dehydrogenation. The well-dispersed Pt particles averaging 1.1 nm in size (Pt/CeO2-SiO2) were primarily attributed to the high surface concentration of oxygen vacancies. The excellent catalytic activity of Pt/ CeO2-SiO2 was attributed to the presence of rich oxygen vacancies on the CeO2 surface.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Ziying Chen, Chengyu Chen, Xuewen Luo, Junhong Liu, Zhujian Huang
Summary: This study investigated the flocculation of nanoplastics (NPs) on layered double hydroxides (LDHs) in water through heteroaggregation analysis under various conditions, revealing the interaction mechanisms and interface reactions. The results showed that the optimal conditions for NP removal were a Mg:Al ratio of 3:1 and a calcination temperature of 300 degrees C. The interparticle forces were dominated by electrostatic repulsion at short distances, transitioning to van der Waals and electrostatic attractions at longer distances, leading to particle attachment.
APPLIED CLAY SCIENCE
(2021)
Article
Green & Sustainable Science & Technology
Yutao Peng, Yuqing Sun, Aamir Hanif, Jin Shang, Zhengtao Shen, Deyi Hou, Yaoyu Zhou, Qing Chen, Yong Sik Ok, Daniel C. W. Tsang
Summary: This study compared biochar-supported LDHs composites prepared using different methods and conditions, showing that the AMOST method can enhance the contaminant removal capacity of adsorbents at higher temperatures and lower metal loadings due to the synergistic effect between LDHs and biochar.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Materials Science, Composites
Lipeng Diao, Qi Gao, Ningce Zhang, Qinglin Dai, Xiaodong Zhang, Daohao Li, Dongjiang Yang, Xilin She
Summary: Two-dimensional calcium aluminum layered double hydroxides (Ca/Al-LDHs) are introduced as solid lubricants in polytetrafluoroethylene (PTFE) molding to enhance its anti-wear performance. The addition of 8% Ca/Al-LDHs increases the wearable performance of LDH-PTFE-8% by 3.4 times, while maintaining excellent mechanical properties. The high unctuosity of Ca/Al-LDHs and the hydrogen-bonding interaction with -OH anions in PTFE result in the formation of a protective transfer film to enhance the wear resistance of LDH-PTFE molding.
COMPOSITES COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Daniel E. L. Vieira, Andrei N. Salak, Mario G. S. Ferreira, Joaquim M. Vieira, Christopher M. A. Brett
Summary: This study focused on incorporating cerium cations into LDH structure to extend the metal surface lifetime by promoting continuation of corrosion protection. UV-radiation-induced LDH degradation resulted in the release of Ce3+ from hydroxide layers, quantified using UV-visible spectroscopy. The continued corrosion protection of aluminum alloy 2024 was examined under different conditions using electrochemical impedance spectroscopy and surface analysis.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Chengjing Mi, Yanping Huang, Fengtao Chen, Kui Wu, Weiyan Wang, Yunquan Yang
Summary: DFT calculations were used to study the catalytic dehydrogenation of methylcyclohexane on Ni-Pt(111) catalyst, which showed weaker binding strength between species and surface metal atoms compared to Pt(111). Pt was identified as the main active component in stable adsorption configurations on Ni-Pt(111).
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Green & Sustainable Science & Technology
Aamir Hanif, Mingzhe Sun, Tianqi Wang, Shanshan Shang, Daniel C. W. Tsang, Jin Shang
Summary: NO2 is a potent air pollutant that can be captured directly from the atmosphere by selective adsorption on porous materials. The study reports the rational development and demonstration of Mg-Al layered double hydroxides and their derived mixed metal oxides as high-capacity adsorbents. By boosting the densities of accessible basic sites, the highest NO2 adsorption capacity was achieved, offering promising, durable, and scalable adsorbents for ambient NO2 removal.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Materials Science, Multidisciplinary
Jun Qin, Hongyu Shi, Qing Lv, Min He, Yong Xu, Mengyu Chen, Xiaolang Chen, Jinsheng Zhang, Yufei Liu, Jie Yu
Summary: The defect ordering MgAl-LDHs nanosheets were designed and fabricated for efficient removal of CR, and the defect enhancing adsorption mechanism provides a new strategy for wastewater remediation.
MATERIALS & DESIGN
(2023)
Article
Chemistry, Physical
Mingtao Zhang, Feng Wang, Yifei Long, Linwen Yu, Changhui Yang, Mengyuan Wen, Xiaolan Yu, Yi Tian, Min Zhao
Summary: This study used calcined Mg/Al layered double hydroxide (CLDH) to improve the carbonation resistance of alkali-activated slag (AAS) mortars. The results showed that CLDH reconstructed the structure of AAS mortars, formed a buffer system to absorb CO2, and increased the density of the mortars.
APPLIED CLAY SCIENCE
(2022)
Article
Chemistry, Physical
Wenhan Wang, Guoqing Cui, Cunji Yan, Xuejie Wang, Yang Yang, Chunming Xu, Guiyuan Jiang
Summary: In this study, an internal electric heating (IEH) assisted mode was proposed, in which the Pt/Al2O3/FF catalyst achieved high catalytic efficiency with a hydrogen evolution rate of above 2060 mmol·g(Pt)·min(-1) in the MCH dehydrogenation process.
Review
Materials Science, Multidisciplinary
Xinfang Zhang, Min Zhang, Ruihong Li, Xiaoyan Feng, Xue Pang, Jinsong Rao, Dalong Cong, Changqing Yin, Yuxin Zhang
Summary: LDHs have been successfully applied in surface protection and functionalization of metal materials due to their special structure, composition, controllability, anion exchange, and other excellent properties. This review focused on the most common LDH preparation methods on magnesium alloys in the past 10 years by summarizing about 70 research papers. The surface of LDH materials were chemically modified to enhance their compatibility with solvents, and their corrosion resistance function was developed as an additive, showing promising potential in composite coatings on Mg alloys.
