MICROCHEMICAL JOURNAL
·
2020
·
IF 3.594
Huanhuan Li,Shujat Ali,Wenya Wei,Yi Xu,Haowei Lu,Md Mehedi Hassan,Xiangyang Wu,Min Zuo,Qin Ouyang,Quansheng Chen
In this study, a novel fluorescence approach for the rapid and selective detection of organophosphorus pesticides is presented. The strategy is based on inhibition of acetylcholinesterase (AChE) activity and NaY/GdF 4 :Yb, Er up-conversion nanoparticles (UCNPs) fabricated with manganese dioxide (MnO 2 ) nanosheets. Water-soluble UCNPs were first synthesized, and MnO 2 nanosheets were fabricated on their surface to get an efficient quencher for up-conversion fluorescence. Subsequently, AChE was used to restore the fluorescence by dissociation of MnO 2 nanosheets from the surface of UCNPs. When diazinon was added into the system, AChE activity was irreversibly impeded and resulted in the quenching of fluorescence. The inhibitory effect was linearly dependent on the concentration of the pesticide. Under the optimized conditions, the proposed sensor showed excellent performance for the detection of diazinon with a wide detection range of 0.1 to 30 ng/mL and a low detection limit (LOD) of 0.1 ng/mL. Besides, the system showed a good selectivity and was applied for diazinon detection in adulterated tea samples with a recovery rate of 98% to 111%. The unique advantages of the strategy such as simple, cost-effective, highly selective and sensitive make it an attractive approach for the detection of OPs in tea commodities.
研究领域:
分析化学
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食品安全
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纳米技术
·
生物传感
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2026
·
IF 3.5
Jiahao Wu,Mengxuan Wei,Yikun Zhou,Jiawei Lin,Jing Zhang,Shiyue Kang,Zining Zhou,Jian Tian,Guowu Zhan
This study presents a systematic approach for synthesizing hierarchical bio-NaY zeolite using rice husk-derived silica (bio-SiO 2 ) as structural and compositional templates. The incorporation of bio-SiO 2 significantly increases mesoporous volume and optimizes the distribution of Lewis acid-base pairs within the zeolite framework. Comparative analysis demonstrates a marked improvement in CO 2 adsorption capacity for the bio-NaY zeolite (147.3 mg·g –1 ) over conventional NaY (138.3 mg·g –1 ). ZLC experimental results reveal that this enhancement is attributed to a dual mechanism: (i) the bio-SiO 2 template promotes the formation of a hierarchical pore system, improving mass transport; and (ii) it enhances the accessibility and exposure of active sites, facilitating CO 2 capture and intraparticle diffusion. Molecular dynamics simulations further reveal that the (100) crystallographic plane exhibits superior CO 2 adsorption affinity, kinetics, and selectivity compared to the (001) plane. Additionally, the integration of 3D printing technology enables the fabrication of mechanically robust monoliths (3D-bio-NaY), simplifying adsorbent handling and regeneration. These 3D-printed structures exhibit exceptional cyclic stability, retaining nearly 100% of their initial CO 2 capture capacity over eight consecutive cycles. The findings provide deep insights into the structure-property relationships of hierarchical zeolite and advance the design of efficient adsorbents for industrial CO 2 capture applications.
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DOI
高影响因子
Frontiers in Chemistry
·
2021
·
IF 5.221
Feng Qilong,Zheng Wenjing,Pu Jie,Chen Qiaoli,Shao Wei
The availability of colloidal nano-materials with high efficiency, stability, and non-toxicity in the near infrared-II range is beneficial for biological diagnosis and therapy. Rare earth doped nanoparticles are ideal luminescent agents for bio-applications in the near infrared-II range due to the abundant energy level distribution. Among them, both excitation and emission range of Er3+ ions can be tuned into second biological window range. Herein, we report the synthesis of ∼15 nm LiYF4, NaYF4, and NaGdF4 nanoparticles doped with Er3+ ions and their core-shell structures. The luminescent properties are compared, showing that Er3+ ions with single-doped LiYF4 and NaYF4 nanoparticles generate stronger luminescence than Er3+ ions with doped NaGdF4, despite the difference in relative intensity at different regions. By epitaxial growth an inert homogeneous protective layer, the surface luminescence of the core-shell structure is further enhanced by about 5.1 times, 6.5 times, and 167.7 times for LiYF4, NaYF4, and NaGdF4, respectively. The excellent luminescence in both visible and NIR range of these core-shell nanoparticles makes them potential candidate for bio-applications.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2023
·
IF 5.2
Congli Li,Jiang Wang,Zhenfei Wang,Jinxiang Dong,Qi Shi
CuCl/NaY is the most representative π-complexation adsorbent, prepared by solid thermal dispersion followed by vacuum thermal activation. However, determining the autoreduction behavior of Cu species for CuCl/NaY adsorbent in vacuum thermal activation has rarely been researched. This study characterized the valence state, location, and types of Cu species during thermal dispersion and vacuum activation. During the thermal dispersion, Cu species were uniformly dispersed into NaY micropores. Under vacuum activation at 100 °C, the location of Cu species changed, migrating from supercages to near the plane (toward the sod cage or the supercage side) of the 6-membered ring connecting the supercage and sod cage. However, by activating at 150 °C, vacuum autoreduction occurred: (Cu 2+ –O − )Cl − species evolved into Cu + Cl − species. This was accompanied by the migration of Cu(I) species to the appropriate CO adsorption site on the plane center of the six-membered ring connecting the supercage and sod cage in the NaY framework, which achieved confined dispersion. The CO adsorption capacity of CuCl/NaY activated at 150 °C was 2.75 mmol/g, significantly higher than when activated at 100 °C. When activated at 200 °C, Cu(II) species was further reduced to Cu(I) slightly, which had not migrated to an effective adsorption site. Our results show the Cu species’ evolution and autoreduction behavior for CuCl/NaY adsorbent under vacuum thermal activation, and they can serve as a reference to guide the preparation of π-complex adsorbents.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2017
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IF 2.446
Changlin Liao,Renping Cao,Wudi Wang,Wen Hu,Guotai Zheng,Zhiyang Luo,Pan Liu
NaY(MoO 4 ) 2 :R (R = Sm 3+ /Bi 3+ , Tb 3+ /Bi 3+ , Sm 3+ /Tb 3+ ) phosphors are synthesized by solid-state reaction method in air. The crystal structures, excitation and emission spectra, luminescence properties, the lifetimes, and the dopant concentration influences are investigated. The emission intensity of activators Sm 3+ and Tb 3+ can be enhanced ∼3.04 and 1.64 times due to energy transfer (ET) from Bi 3+ to Sm 3+ /Tb 3+ . NaY(MoO 4 ) 2 :Sm 3+ , Tb 3+ phosphor with excitation 300 nm shows a tunable emission from red to yellow with change Sm 3+ or Tb 3+ ion concentration. Emission intensity of NaY(MoO 4 ) 2 :Sm 3+ phosphor can be enhanced ∼2.24 times via co-doping Tb 3+ ion owing to ET from Tb 3+ to Sm 3+ ions. The results indicate that ET between sensitizer and activator (Bi 3+ → Tb 3+ , Bi 3+ → Sm 3+ , and Tb 3+ → Sm 3+ ) is beneficial to improve the luminescence properties of activator (Sm 3+ and Tb 3+ ). ET and luminous meachanisms are explained by energy level diagrams of Bi 3+ , Tb 3+ , and Sm 3+ ions.
研究领域:
材料科学
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发光材料
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光学物理
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固态化学
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DOI
高影响因子
Energies
·
2022
·Vol. 15
·期 7
·2620
·
IF 3.252
Fanjing Wei,Xiaoqin Guo,Weiren Bao,Liping Chang,Junjie Liao
The ultra-deep removal of thiophene is essential for the conversion of coke oven gas to methane and metal modified Y zeolite has excellent thiophene adsorption capacity. The effects of temperature on chemisorption between metal modified Y zeolite and thiophene and the reductive gases in coke oven gas on the thiophene adsorption performance still remains ambiguous. To address the aforementioned aims, series of NaMY (M = Ce, Ni, Zn and Ag) were prepared via ion-exchanged with Na+of NaY, and two comparable sets of thiophene adsorption evaluation were conducted in a fixed bed reactor: (1) NaY and NaMY were evaluated at different temperatures in simulated coke oven gas, and (2) NaCeY was evaluated in N2and different reductive atmospheres. The results show that NaNiY, NaZnY and NaAgY could adsorb thiophene via π-complexation, however, NaCeY mainly through S-Ce bond. Π complexation becomes weak above 150 °C, and the strength of S-Ce bond varies little when the temperature rises to 250 °C. Compared with that of other sorbents, the breakthrough adsorption capacity for thiophene (Qb-thiophene) of NaAgY reaches the highest 144 mg/g at 100 °C, but decreases sharply when temperature rises to 200 °C. NaCeY has relatively low variation inQb-thiophenefrom 100 °C to 200 °C. Moreover, Ce(IV) in NaCeY is more favorable for thiophene adsorption than Ce(III) in coke oven gas and the presence of H2and CO would reduce the desulfurization activity of NaCeY. For the industrial utilization of thiophene ultra-deep removal, NaAgY has an excellent potential below 150 °C, while NaCeY with more Ce(IV) has a good prospect at 150–250 °C.Keywords:coke oven gas;thiophene;adsorption;Y zeolite;metal modification
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
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2025
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IF 6
Chunjing Liu,Guoqiang Xu,Yangyang Xie,Chenghua Zhang,Xin Hu,Hongxu Chen,Botao Teng
Adsorption and recovery of valuable alcohols and acids from industrial wastewater are of significant importance for sustainable chemical production and environmental remediation. Developing high-capacity adsorbents requires understanding the effects of micropore structure and surface hydrophilicity/hydrophobicity on adsorption performance. NaY zeolite with a well-defined pore structure was modified using methyltriethoxysilane (MTES) as adsorbents with varying hydrophobicities and evaluated by alcohols/acids and FTS wastewater measurements. MTES modification preserved the crystal structure of NaY zeolite; the hydrophobicity of zeolites increased, while the specific surface area and micropore volume decreased with increasing MTES dosage. Upon adsorption measurements, zeolites with higher hydrophilicity exhibited lower alcohol/acid adsorption capacity; whereas a moderate hydrophobicity (contact angle of 84°) and relatively high micropore volume (0.19 cm 3 /g) achieved the highest adsorption capacity of 328 mg/g, outperforming the zeolite with higher hydrophobicity and lower micropore content. Adsorption isotherm fitting revealed that alcohol/acid adsorption on the zeolites followed the Langmuir model. This work provides a strategic guideline for designing efficient zeolite-based adsorbents by balancing hydrophobicity and porosity. Future studies should uncover the adsorption mechanism at the hydrophobic interface for further improving the long-term stability of the modified zeolites.
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高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2026
·
IF 4.5
Rui Li,Hongjuan Zhao,Tian Xia,Suofu Nie,Chuanhang Zhou,Qiang Zhang,Jiujiang Wang,Penghui Zeng,Maocai Shi,Honghai Liu,Xionghou Gao,Chunming Xu,Baojian Shen
A synergistic vapor-phase strategy using CHCl 3 and SiCl 4 regulates pore structure and acidity in NaY zeolite. • A one-step process constructs a hierarchical micro-mesoporous structure with Al-depleted bulk and Al-enriched surface layer. • Controllable mesopore evolution by tuning the imbalance between CHCl 3 -guided dealumination and SiCl 4 -assisted silication. • A system with Brønsted acidity (framework Si(1Al)) and Lewis acidity (extra-framework Al) is built. To overcome micropore diffusion limitations and acid site regulation in FCC zeolite catalysis, this study develops a synergistic vapor-phase modification using SiCl 4 and CHCl 3 . By tuning the agent ratio, pore structure and acid distribution are optimized while preserving NaY framework integrity. The synergy is not a simple combination but a dynamic process featuring CHCl 3 -guided dealumination and SiCl 4 -assisted silication with a moderate imbalance. CHCl 3 selectively removes Al from Al-rich sites, preserving framework Al predominantly as Si(1Al) units, which generate abundant Brønsted acid sites (BAS) and promote diffusion pathways. Meanwhile, SiCl 4 repairs framework defects and anchors extracted Al as highly dispersed extra-framework Lewis acid sites (LAS). This cooperative interaction creates a hierarchical micro-mesoporous structure with a low-Al bulk and an Al-rich surface layer, retaining abundant BAS while introducing strong LAS-achieving balanced acidity. In n-octane cracking, this architecture enhances diffusion, suppresses hydride transfer, and improves light olefin (C 3 –C 4 ) selectivity. This work provides insights into zeolite structure-performance relationships for rational catalyst design. A synergistic vapor-phase modification creates a zeolite with a hierarchical micro-mesoporous structure, featuring a low-aluminum bulk and an aluminum-rich surface. This architecture optimizes pore connectivity and acid site distribution for enhanced cracking performance. Download: Download high-res image (406KB) Download: Download full-size image
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Shudan Chi,Yi Ye,Xinglei Zhao,Junteng Liu,Junsu Jin,Le Du,Jianguo Mi
Greenhouse gases lead to frequent natural disasters, and CO 2 emissions from flue gases account for nearly half of anthropogenic CO 2 emissions. As an adsorbent, molecular sieves show excellent CO 2 adsorption; however, their defects limit their industrial application. To solve the problem of powder blockage and H 2 O absorption, we proposed the in-situ growth of molecular sieve in polyacrylate matrix beads to obtain molecular sieve composite for CO 2 capture in flue gas after combustion. Compared with those of pristine NaY, the CO 2 adsorption capacity of NaY@PA composite increased by 17.9 % and the H 2 O adsorption capacity decreased by 36.6 %. For further reduction in H 2 O absorption, post-modified composite NaY-ZIF@PA was synthesized by loading ZIF on NaY@PA surface to form a bilayer composite structure. The H 2 O absorption of NaY-ZIF@PA was reduced by 54.8 %, thus ensuring highly efficient CO 2 adsorption.
研究领域:
环境科学
·
材料科学
·
化学工程
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产品关联
DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
·
2022
·
IF 3.428
Bo Meng,Shenyong Ren,Zhi Li,Weiyu Song,Qiaoxia Guo,Baojian Shen
Decreasing steam treating temperature of zeolite Y to prepare USY has great attraction for industrial production of FCC catalysts, which is often operated at high temperature thus leading to huge energy consumption. Heteroatoms in the framework of zeolite Y are easier to be removed under steam condition, but the introduction of heteroatoms often leads to the decrease of relative crystallinity of zeolite. When Ga 3+ is introduced into the framework of zeolite Y, high crystallinity is well maintained in this work. Interestingly [Al, Ga]-NaY can be treated at low steam temperature to form [Al, Ga]-USY with very good mesoporosity and high framework SiO 2 /Al 2 O 3 ratio. The sample [Al, Ga]-NaY-8 has a distinctive micropore size distribution at 0.92 nm which is much bigger than conventional microporous NaY. DFT study disclosed the reason of low temperature steam treatment. The catalytic cracking of 1,3,5-TIPB and n -octane showed that the catalyst [Al, Ga]-USY obtained at lower steam treating temperature presented good performance.
研究领域:
化学工程
·
材料科学
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DOI
高影响因子
DALTON TRANSACTIONS
·
2018
·Vol. 47
·期 26
·8697-8705
·
IF 4.099
Yang Ding,Jie Liu,Ming Zeng,Xishu Wang,Junli Shi,Weili Wang,Yanru Miao,Xibin Yu
Rare earth (RE3+)-doped NaY(MoO4)2 nanocrystals are efficient materials for realizing multicolor emission, which plays an important role in displays, W-LEDs, solar cells and biolabeling. Up to now, research on the multicolor tuning properties of RE3+-doped NaY(MoO4)2 nanoparticles has mostly focused on traditional preparation routes such as the hydrothermal method and sol–gel process. However, the products obtained using these methods are usually large in size (on the micron/submicron scale) and agglomeration problems are inevitable. With the development of nano optoelectronic devices and bioluminescence labeling, there is an urgent need to find an efficient method to prepare nanoscale, monodispersed and NaY(MoO4)2:RE3+ nanocrystals (NCs) with good crystallinity and stronger emission properties. In this work, we demonstrate a simple, fast, reproducible and one-step synthesis of NaY(MoO4)2:Eu3+ NCs with sizes varying from 1–20 nm via a ligand-assisted reprecipitation strategy. The reaction mechanism and emission intensities of NaY(MoO4)2:Eu3+ NCs with various morphologies have been discussed in detail. Furthermore, Tb3+ and Eu3+ ion co-doped NaY(MoO4)2 NCs were also prepared, and various emission colors were obtained and tuned from red, orange-red, yellow and yellow-green to green. Energy transfer between the Tb3+ and Eu3+ ions in the NaY(MoO4)2 host matrix has also been demonstrated. Finally, a highly efficient and stable NaY(MoO4)2:0.05Tb,0.04Eu NC-based W-LED device was built, which indicates the promising future application for this material in the field of lighting. The tunable multicolour emission, ease of preparation and nanosize reveal that NaY(MoO4)2:RE3+ NCs have a potential application in full color displays and W-LEDs.
研究领域:
材料科学
·
纳米技术
·
光学材料
·
无机化学
·
光电子学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2026
·
IF 2.6
Zhongxing Geng,Yucai Qin,Zhiqiang Zhang,lijuan Song
In this research, we formulated a systematic and elaborate experimental protocol.Initially, a minute quantity of Ce was introduced into the NaY framework via the hydrothermal method, followed by gradient temperature calcination to acquire a series of Ce-NaY samples. Subsequently, a multi-dimensional characterization method was adopted. This method included HRTEM, Refinement of XPRD structure, XPS, NH3-TPD, Py-FTIR, In-situ IR-catalytic conversion using cyclohexene as the probe, and microreactor hydrogen transfer activity assessment. The aim was to precisely trace the location of low-content Ce within the framework and uncover its regulatory mechanism regarding the " precursor " of FCC carbon deposition. The results indicated that the Ce0.01-550Y sample achieved the lowest carbon deposition while maintaining the highest cyclohexane yield. Its excellent performance stemmed from the fine matching and synergistic effect of Brønsted acid and Lewis acid densities. This research indicates that by precisely adjusting the spatial distribution of rare earth ions in NaY zeolite, the steps that initiate carbon deposition can be hindered, thereby reducing the selectivity of carbon deposition.
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高影响因子
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