Core–shell zeolite Y with ant-nest like hollow interior constructed by amino acids and enhanced catalytic activity

Zhang, Jian; Bai, Shuo; Chen, Zhuwen; Wang, Yanding; Dong, Lei; Zheng, Hairong; Cai, Feiyan; Hong, Mei

doi:10.1039/c7ta05048h

Cited by 44 publications

(31 citation statements)

References 44 publications

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“…www.advancedsciencenews.com www.aem-journal.com 6800 kJ/(m 3 cycle) for thick film lanthanum zirconate stannate titanate (PLZST); [127] 7570 kJ/(m 3 cycle) for thin film YbFeO 3 (YBFO); [128] 7800 kJ/(m 3 cycle) for thick film PLZST; [129] and 8000 kJ/(m 3 cycle) for thin film 0.68PMN-0.32PT. [130] Zhang et al [131] demonstrated the significant benefits of exploiting highly aligned porosity in piezoelectric and pyroelectric materials for an improved energy harvesting performance. Novel 2-2 connectivity PZT ceramics with aligned pore channels were prepared by freeze-casting water-based PZT suspensions, with porosity levels ranging from 20 to 60 vol%.…”

Section: Pyroelectric Energy Harvestersmentioning

confidence: 99%

A Review on Piezoelectric, Magnetostrictive, and Magnetoelectric Materials and Device Technologies for Energy Harvesting Applications

2017

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In the coming era of the internet of things (IoT), wireless sensor networks that monitor, detect, and gather data will play a crucial role in advancements in public safety, human healthcare, industrial automation, and energy management. Batteries are currently the power source of choice for operating wireless network devices due to their ease of installation; however, they require periodic replacement due to capacity limitations. Within the scope of the IoT, battery maintenance of the trillion sensor nodes that may be implemented will be practically infeasible from environmental, resource, and labor cost perspectives. In considering individual self-powered sensor nodes, the idea of harvesting energy from ambient vibrations, heat, and electromagnetic waves has recently triggered noticeable research interest in the academic community. This paper gives an overview of energy harvesting materials and systems. Three main categories are presented: piezoelectric ceramics/polymers, magnetostrictive alloys, and magnetoelectric (ME) multiferroic composites. State-of-the-art harvesting materials and structures are presented with a focus on characterization, fabrication, modeling and simulation, and durability and reliability. Some perspectives and challenges for the future development of energy harvesting materials are also highlighted.

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Section: Pyroelectric Energy Harvestersmentioning

confidence: 99%

A Review on Piezoelectric, Magnetostrictive, and Magnetoelectric Materials and Device Technologies for Energy Harvesting Applications

2017

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“…We then employed our mesoporogenic amino acids to synthesize zeolite Y, which belongs to faujasite framework with FAU topology and Si/Al ratio from 1.5 to 3. Interestingly, the natural amino acids directed the biomimetic mineralization of core‐shell mesoporous Y zeolites, as shown in Figure , which possessed an ant‐nest like hollow interior and a mechanically strong thin microporous shell. The core‐shell zeolite Y samples exhibit superior crystallinity and enhanced catalytic activity for Friedel‐Crafts benzylation of toluene, affording a yield twice that obtained over conventional zeolite Y, and also much higher than that of FAU nanosheets …”

Section: Roles Of Organic Small Moleculesmentioning

confidence: 99%

“…This is then followed by local perfection driven by thermodynamics towards equilibrium. For example, the amino acid dissociates from the weak point inside the aluminosilicate through coordinated construction actions, and gradually generates internal interconnected mesopores while maintaining the external structure of the zeolite, increasing crystallinity and mechanical strength . Usually, creation of internal void and building zeolite crystallinity are contradictory processes.…”

Section: Omega On the Crystallization Pathwaymentioning

confidence: 99%

“… Time‐resolved crystallization studies of cross sectional TEM of the mesoporous zeolite Y mediated by carnitine at crystallization time of (a) 12 h, (b) 14 h, (c) 16 h, (d) 18 h and (e) 20 h, suggesting the progressive development of mesopore channels from internal weaknesses and (f) powder XRD patterns obtained at different hydrothermal synthesis stages revealing that the carnitine mediation increased the zeolite crystallinity by 20% despite the generation of internal mesopores . LC‐Y refers to the zeolite Y sample synthesized in the presence of L‐carnitine, and Y‐20 refers to the conventional zeolite Y sample synthesized for 20 h without organic additives.…”

Section: Omega On the Crystallization Pathwaymentioning

confidence: 99%

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Organic Mesopore Generating Agents (OMeGAs) for Hierarchical Zeolites: Combining Functions on Multiple Scales

2019

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In the synthesis of porous zeolites, small organic molecules usually function as organic structure‐directing agents (OSDAs) or zeolite growth modifiers (ZGMs), while mesoporous zeolites are typically synthesized by employing the physical space‐filling strategy with mesoscale templates including carbons, surfactants, and polymers. Recently, we discovered that a class of small organic molecules including the common amino acids could mediate the formation of zeolite mesopores based on a chemical bond‐breaking mechanism. This class of organic mesopore generating agents (OMeGAs) are distinguished by their ability to form organic anions in situ. In this minireview, we briefly introduce the widely recognized role of OSDA and ZGM, and then focus on the interesting function of OMeGA for the intracrystalline void generation. Comparison of OMeGA with the mesoscale templates especially surfactants are made in terms of their mesopore‐forming mechanisms, and the potential implications on a possible dissociative‐associative crystallization pathway are discussed. We end this review with the prospects of future research on the small molecule OMeGA, such as function integration and structure optimization.

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“…During the process, roots of plants actively or passively release root exudates (REs). REs contain various organic compounds such as carbohydrates, organic acids, and amino acids . These REs could provide important sources of carbon and energy for microbial growth conveniently and subsequently alter the species composition in the rhizosphere.…”

Section: Introductionmentioning

confidence: 99%

Influence of Artificial Root Exudates on Triclosan Removal in Soil under Aerobic and Anaerobic Conditions

Liu¹,

Wang²,

Xie³

et al. 2018

CLEAN Soil Air Water

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A batch experiment is conducted to evaluate the influence of root exudates on the removal of triclosan (TCS) in soil samples under aerobic and anaerobic conditions. The BIOLOG method and quantitative real‐time PCR (qPCR) is used to analyze the microbial metabolic characteristics and bacterial absolute abundance, respectively. The results shows that TCS is removed relatively faster in aerobic groups than anaerobic ones, especially in the aerobic group with artificial root exudates solution (ARES) addition. However, no difference can be seen in TCS removal performance between anaerobic groups with or without ARES addition (p > 0.05). The results of BIOLOG show that the average metabolic activity of microorganisms (AWCD) increases significantly in the aerobic group with ARES addition with time, followed by the aerobic control group and anaerobic groups. The carbon source utilization behavior of soil microbes exhibit significant differences. Carbohydrates can be utilized easily in the aerobic group with ARES addition, while the fractional content of amines in the anaerobic group with ARES is highest. Furthermore, bacterial abundance shows positive correlation with the TCS removal under aerobic conditions. Overall, ARES addition can greatly promote the removal efficiency of TCS under aerobic conditions, but have a small effect under anaerobic conditions.

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Core–shell zeolite Y with ant-nest like hollow interior constructed by amino acids and enhanced catalytic activity

Abstract: One-pot synthesis of core–shell zeolite Y with 3D interconnected mesochannels with enhanced crystallinity and catalytic activity by using amino acids.

Cited by 44 publications

References 44 publications

A Review on Piezoelectric, Magnetostrictive, and Magnetoelectric Materials and Device Technologies for Energy Harvesting Applications

A Review on Piezoelectric, Magnetostrictive, and Magnetoelectric Materials and Device Technologies for Energy Harvesting Applications

Organic Mesopore Generating Agents (OMeGAs) for Hierarchical Zeolites: Combining Functions on Multiple Scales

Influence of Artificial Root Exudates on Triclosan Removal in Soil under Aerobic and Anaerobic Conditions

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