Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 42
·21029-21038
·
IF 9.931
Liang Zhang,Jing Wang,Xinyi Ren,Wentao Zhang,Tianshu Zhang,Xinnan Liu,Ting Du,Tao Li,Jianlong Wang
The excessive accumulation of toxic copper species makes it imperative to develop smart dual-functional materials for the simultaneous removal and detection of Cu(II) in drinking water. In this work, novel core–shell NH2-MIL-101(Al)@ZIF-8 nanoflowers were successfully fabricated via an internal extended growth mode under the regulation of polyvinylpyrrolidone (PVP) to achieve this goal. Benefiting from the specific affinity of imidazole nitrogen in ZIF-8 toward Cu(II), the resultant NH2-MIL-101(Al)@ZIF-8 shows high adsorption capacity (526.74 mg g−1). Moreover, the fluorescence of NH2-MIL-101(Al) shows a Cu(II)-dependent change, causing this composite to possess superior selective/sensitive detection with a broad linear range (1.5–625 μM) and a low detection limit (0.17 μM) for Cu(II). Specifically, the hybrid MOF@MOF structure provides greater sensitivity as compared to the individual constituent (pristine NH2-MIL-101(Al)) and the mixed state, which is ascribed to the rational optimization of the smart adsorbent based on the following two aspects. (i) The synergistic effect of the core–shell nanostructure improves the preconcentration ability at the interface between single MOFs. (ii) The existence of the three-dimensional hierarchical nanoflower architecture (structure optimization) accelerates the mass transport and sculpts the final composite with enhanced adsorption and detection ability. These indicate that the smart NH2-MIL-101(Al)@ZIF-8 nanoflower could be an excellent candidate for the synchronous remediation and selective detection of Cu(II) in aqueous systems, which could be potentially useful in wastewater treatment and water quality monitoring.
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高影响因子
Nanomaterials
·
2022
·Vol. 13
·期 1
·39
·
IF 5.719
Yuan-Dong Xu,Yan-Ping Jiang,Xin-Gui Tang,Qiu-Xiang Liu,Zhenhua Tang,Wen-Hua Li,Xiao-Bin Guo,Yi-Chun Zhou
Resistive random-access memory (RRAM) is a promising candidate for next-generation non-volatile memory. However, due to the random formation and rupture of conductive filaments, RRMS still has disadvantages, such as small storage windows and poor stability. Therefore, the performance of RRAM can be improved by optimizing the formation and rupture of conductive filaments. In this study, a hafnium oxide-/aluminum-doped zinc oxide/hafnium oxide (HfO2/Al-ZnO/HfO2) tri-layer structure device was prepared using the sol–gel method. The oxygen-rich vacancy Al-ZnO layer was inserted into the HfO2layers. The device had excellent RS properties, such as an excellent switch ratio of 104, retention of 104s, and multi-level storage capability of six resistance states (one low-resistance state and five high-resistance states) and four resistance states (three low-resistance states and one high-resistance state) which were obtained by controlling stop voltage and compliance current, respectively. Mechanism analysis revealed that the device is dominated by ohmic conduction and space-charge-limited current (SCLC). We believe that the oxygen-rich vacancy concentration of the Al-ZnO insertion layer can improve the formation and rupture behaviors of conductive filaments, thereby enhancing the resistive switching (RS) performance of the device.
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高影响因子
ULTRASONICS SONOCHEMISTRY
·
2018
·
IF 6.012
Xuan Liu,Zhichao Guo,Jilai Xue,Cheng Zhang
s In this work, ultrasound has been employed to help prepare Al-Sc alloys using the molten salt electrolysis. The effects of synergetic ultrasound on the Sc content and primary Al 3 Sc particles of Al-Sc alloys are specifically investigated. Ultrasound can strongly promote the Sc content of the electrolytic Al-Sc alloy and transform the large Al 3 Sc phase clusters into fine cubic particles. Meanwhile, it also homogenizes the distribution of Al 3 Sc phase. The Sc content increases by 74.4% up to 1.43 wt% when applying ultrasound during both electrolysis and solidification process. It also transforms the molten salts/liquid Al interface by enhancing the wettability. The huge primary Al 3 Sc phase clusters transform into fine cubic particles by ultrasound. The average particle size reduces from 77 ± 36 μm down to 21 ± 8 μm. The concerned mechanism have been discussed in detail.
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Suqi Huo,Wenyue Zhang,Yujie Qiang,Ye Zhang,Subramanian Sundarrajan,Lei Guo,Tianhu Liu,Seeram Ramakrishna
Aluminum-air batteries, known for their high energy density and environmental friendliness, often face significant challenges due to the corrosion of aluminum anodes, which limits their performance and lifespan. The corrosion inhibition effect of eco-friendly N-α-Fmoc-N-epsilon-Boc-D-lysine (FDLH) in alkaline aluminum-air battery on Al-5052 anodes is investigated by H 2 evolution experiments, electrochemical tests, microscopic characterization, spectroscopic examination, and simulated calculations. It demonstrates that the carboxyl oxygen in the molecular structure of FDLH has good coordination with the Al. FDLH can form an adsorption film on the surface of Al-5052 anode, achieving the purpose of protecting the Al-5052 anode from corrosion. Furthermore, the adsorption behavior of the FDLH plays a crucial role in achieving uniform anode discharge potential and enhancing electrochemical performance. At an optimal concentration of 7 mM FDLH, the inhibition efficiency reaches 57.1 %, while the anode utilization rate increases to 85.0 %. These findings highlight the potential of FDLH as an effective corrosion inhibitor, contributing to the improvement of both the durability and efficiency of aluminum-air battery systems.
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高影响因子
JOURNAL OF AEROSOL SCIENCE
·
2025
·
IF 2.9
Shuting Lei,Yiyang Zhang,Zhu Fang,Xing Jin,Shuiqing Li
Spray flame synthesis has proven to be a promising method for the high-throughput production of multi-component nanoparticles with atomic-level mixing. However, the fast dynamic of flame synthesis presents significant challenges in precisely controlling the morphology and crystalline phase of the particles, especially for multi components. In this paper, we conduct parametric flame synthesis experiments to identify key factors affecting nanoparticle morphology and crystal phase of Y-Al nanoparticles, focusing on the effects of Y/Al atomic ratio, flame temperature, and precursor volatility. The results indicate that the particle morphology depends on the composition, changing from aggregates with sintering necks to spherical particles without sintering necks and back to aggregates as the Al content increases. This trend is consistent with the change in particle melting points, which initially decrease and then rise again. Thus, the variation in melting point causes changes in sintering time, which in turn affect the particle morphology. The particle crystalline phase gradually deviates from the target phase as the Al content increases. Raising the adiabatic flame temperature from 1551 °C to 2340 °C accelerates the diffusion of Al atoms into the lattice, increasing the target phase proportion in the synthesized particles from 66 % to 99 %. By adjusting the amount of 2-ethylhexanoic acid (EHA) added, the volatility differences between the precursors can be modified. The largest discrepancy in precursor volatility is observed when EHA was added at a 50 % equivalence ratio, resulting in only 6 % of the target phase YAH (YAlO 3 , hexagonal type) in the particles. Increasing the EHA addition to 120 % equivalent results in better matching of precursor volatilities, which leads to a significant increase in the target YAH phase to 98 %, demonstrating the critical role of simultaneous evaporation of different component precursors.
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2020
·
IF 3.306
Chun Kan,Xiaotao Shao,Linyun Wu,Yao Zhang,Xiaofeng Bao,Jing Zhu
High-selectivity detection of trace Al 3+ ions in water and biological systems by a fluorescence imaging method is not yet mature. Herein, we synthesized a novel reversible Al 3+ -specific fluorescent probe named RBLF by linking Rhodamine B and pyridine-3-sulfonyl chloride through o-phenylenediamine in several reactions. RBLF exhibited an ultra-high sensitive and excellent selective response towards Al 3+ by fluorescence and UV–vis spectra in aqueous solutions. What is more worth mentioning is that its response is fast, dual changes in color and fluorescence of the probe solution that can occur instantaneously after adding with Al 3+ . Its detection limit for Al 3+ ions in aqueous system solutions is 14.23 nM, which is far below the maximum allowable amount of Al 3+ in drinking water. Moreover, the probe provided an effective method for detecting low concentrations of Al 3+ in natural water, living cells, zebrafish and plant tissues.
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高影响因子
GEOCHIMICA ET COSMOCHIMICA ACTA
·
2009
·
IF 4.235
Sean A. Shaw,Derek Peak,M. Jim Hendry
Although widely investigated in relation to acid mine drainage systems at pH > 1.0, we know little about the impact of sulfuric acid (H 2 SO 4 ) on the geochemistry and mineralogy of clays at pH < 1.0 (including negative pH values). Thus, laboratory batch experiments were conducted on three mixed clay samples with different mass ratios of phyllosilicates (smectite, illite , and kaolinite) to investigate the impact of H 2 SO 4 from pH 1.0 to −3.0 for exposure periods of 14, 90, 180, and 365 days. Si and Al K- and L 2,3 -edge X-ray absorption near edge structure (XANES) spectroscopy were employed on these samples to determine the chemical and structural changes that occur during acidic dissolution of phyllosilicates that cannot be distinguished using X-ray diffraction analyses. A series of silicate, phyllosilicate, and Al-bearing standard compounds were also studied to provide an explanation for the observed changes in the clay samples. The Si XANES results indicated the preferential dissolution of the phyllosilicates (pH ⩽ 1.0, t ⩾ 14 d), the persistence of quartz even at pH ⩾ −3.0 and t ⩾ 365 d, and the formation of an amorphous silica-like phase that was confined to the surface layer of the altered clay samples at pH ⩽ 0.0 and t ⩾ 90 d). Al XANES results demonstrated dissolution of Al-octahedral layers (pH ⩽ 1.0, t ⩾ 14 d), the persistence of four-fold relative to six-fold coordinated Al, and the precipitation of an Al-SO 4 -rich phase (pH ⩽ −1.0, t ⩾ 90 d). An existing conceptual model of phyllosilicate dissolution under extremely acidic conditions was modified to include the results of this study.
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高影响因子
ACTA PHYSICO-CHIMICA SINICA
·
2017
·Vol. 33
·期 8
·1672-1680
·
IF 0.767
LIAO Pei-Yi,ZHANG Chen,ZHANG Li-Jun,YANG Yan-Zhang,ZHONG Liang-Shu,GUO Xiao-Ya,WANG Hui,SUN Yu-Han
A series of Cu/Co/Mn/Al catalysts derived from hydrotalcite precursors with different Cu/Co molar ratios (0, 0.1, 0.5, 1.0, and 2.0) were prepared and used for the synthesis of higher alcohols from syngas. N2 physical adsorption desorption, inductively coupled plasma atomic
emission spectrometry (ICP-AES), X-ray diffraction (XRD), scanning electron microscopy (SEM), hydrogen temperature-programmed reduction (H2-TPR), thermogravimetry (TG), and high-resolution transmission electron microscopy (HRTEM) techniques were employed to investigate the physical
and chemical properties of the Cu/Co/Mn/Al catalysts. The results show that the optimum Cu content can increase specific surface area, improve reducibility, and form regular layered structure to provide more uniform distribution of active sites, thereby enhancing catalytic activity and alcohol
selectivity. When the Cu/Co molar ratio was 0.5, the yield of alcohol and the alcohol selectivity reached the maximum values of 0.071 g·g-1·h-1 and 35.9%, respectively.
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高影响因子
Catalysis Science & Technology
·
2020
·Vol. 10
·期 5
·1467-1476
·
IF 5.721
Zhuo-Qian Li,Xinxin Fu,Caiyan Gao,Jinyu Huang,Baojun Li,Yongpeng Yang,Jie Gao,Yonglong Shen,Zhikun Peng,Jing-He Yang,Zhongyi Liu
The one-step hydroalkylation of benzene to cyclohexylbenzene (CHB) needs to occur on bifunctional metal/zeolite catalysts, and introducing more acid sites to match the metal sites plays a key role in improving the matching of acid/metal sites toward the requirements of benzene hydroalkylation. Herein, we designed and constructed a Si–Al framework coating with extra acid sites outside the surface of the Pd/HBeta catalyst and obtained a zeolite-encaged Pd NP structure (Pd@HBeta). Notably, the Pd@HBeta catalysts achieved excellent catalytic performance with 44.0% CHB selectivity at about 85.0% benzene conversion, which is much higher than that of the Pd/HBeta catalyst with a CHB selectivity of 25.1% at the same benzene conversion. The remarkable increment of CHB selectivity of Pd@HBeta is mainly attributed to the extra acid sites provided by the coated Si–Al framework as well as the increase of the B/L ratio. Moreover, the adsorption capacity of benzene and cyclohexene is greatly improved after introducing extra acid sites by coating the Si–Al framework, which is beneficial for both hydrogenation and alkylation. Further DFT calculations reveal that C6H10 can easily desorb from Pd NPs and migrate to the acidic channel of HBeta in the Pd@HBeta catalyst than that in Pd/HBeta. Our work presents an elegant example of catalytic hydroalkylation selectivity regulation by coating an extra Si–Al framework to enhance the matching of acid/metal balance.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Haijun Qiu,Xu Wang,Jing Cen,Penghui Shi,Jinchen Fan,Yulin Min,Qunjie Xu
Many methods used to synthesize efficient reducing agents of Fe and Al–layered double hydroxide (Fe/Al–LDH) nanosheets against oxidizing contaminants often require the use of unstable bivalent iron salts and long aging times at ambient temperatures. Here, we developed an easy-to-operate, environment-friendly, and scaled-up electrochemical engineering method without adding metal salts to synthesize Fe/Al–LDHs via an electrolytic reaction of active metal electrodes (Fe and Al). The process resulted in the growth of thin hexagonal Fe/Al–LDHs with a lateral size of approximately 100 nm and thickness of approximately 32 nm. The crystallization process of Fe/Al–LDHs strongly relied on the crystal nucleus of the first precipitate Al(OH) 3 and the Fe chemical valence. The oxidation state of Fe was markedly influenced by hydroxyl ions that formed on the cathode surface and the oxygen evolution reaction at high current density ( i ). The fast and simple manufacturing technique not only had high yield (approximately 0.2 g of Fe/Al–LDHs was obtained when i was 2 mA/cm 2 within 25 min) but also afforded Fe/Al–LDHs with excellent reducibility for the removal of Cr(VI). This study demonstrated an attractive option for the rapid and large-scale synthesis of Fe/Al–LDHs to enhance their application prospects.
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PubMed
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Jiangfu Zheng,Wenbo Li,Rongdi Tang,Sheng Xiong,Daoxin Gong,Yaocheng Deng,Zhanpeng Zhou,Ling Li,Long Su,Lihua Yang
In this study, an investigation is conducted into the degradation of nitenpyram (NTP) using highly efficient APMMO/PDS/Vis system. As photocatalysts, silver phosphate (AP) and calcined Zn–Al layered double hydroxides (MMO) exhibit high efficiency in achieving charge separation. Besides, the injection of electrons into peroxydisulfate (PDS) from the APMMO can contribute to obtaining the species in the active state with higher efficiency. Based on the APMMO/PDS/Vis system, 50 mg/L of nitenpyram (NTP, 50 mL) can be completely removed in 60 min using 0.8 g/L photocatalyst and 0.2 g/L PDS under the optimum condition and visible light (780 nm > λ > 420 nm). Meanwhile, as demonstrated under visible light within 30 min, an ultrahigh degradation efficiency can be achieved by NTP based on APMMO1/PDS/Vis system. Besides, the electron paramagnetic resonance (EPR) technique and radical quenching experiments suggested 1 O 2 , h + , SO 4 − •, •O 2 − , and •OH are all contributory to the removal of pollutants. Given the outcomes achieved by LC/MS system and mass spectrometry, the primary degradation intermediates of NTP end up being converted into photodegradation products (such as 2-Chloropyridine, 6-Chloropurine Riboside and dl -Leucine). Additionally, there are three potential photodegradation pathways to NTP degradation have been deployed. Moreover, the NTP light degradation occurring in APMMO1/PDS/Vis system is competent under the three types of real water sample. Accordingly, the high-efficiency APMMO1/PDS/Vis system is fit for use in water pollution control for agricultural productions.
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PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Xiaogang Guo,Taotao Liang,Huisheng Huang,Binfang Yuan,Jing Wang
In 21st century, the microchip plays an essential role in data and information security, and preventing information leakage stored in chips becomes more challenging. This paper firstly introduced electrophoretic assembly technique and surface functionalization to design the C-doped nano-Al/Co 3 O 4 functional energetic material (nFEM) coating with triple stability of anti-wetting, micro-structure and energy-release for at least one year, and the energetic film was integrated with copper based-chip to construct the C-doped Al/Co 3 O 4 nFEM-chip to realize its self-destruction. Product shows outstanding anti-wetting properties with high water contact angle of 168 ± 1° and extremely low sliding angle of ∼ 1°, and well weather resistance in variable environments. Impressively, the output of heat (Q) of product can reach up to 3598 J/g nearly 85% of theoretical value with a relatively low activation energy of 235.46 kJ/mol, and keeps almost thermopositive stability even for immersed samples for fifty cycles after one year exposure test. In addition, C-doped Al/Co 3 O 4 nFEM-chip after immersion and exposure tests can also be effectively destroyed or ignited with a dazzling flame in an ultrashort time (<1ms), demonstrating the great advantage and huge application potentials for the design of other functional transient-chips with nano/micro-scale high-energy systems applied in different environments, even underwater.
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高影响因子
危险品化学品经营许可证（带存储）