ENERGY & FUELS
·
2023
·
IF 5.3
Yuxiang Mao,Jun Cheng,Hao Guo,Lei Qian,Weijuan Yang,Ji-Yeon Park
To improve Co-LDH nanosheet utilization in catalytic conversion of microalgal lipids to biodiesel, an efficient bifunctional catalyst with synergetic acid and base sites was synthesized by in situ growth of Co-LDH nanosheets on HY zeolite. The bifunctional catalyst with a molar ratio of Co-LDH nanosheets to HY zeolite at 4 exhibited synergistic catalysis of acid sites in the HY zeolite and base sites Co(OH)x (x = 2, 3) in the Co-LDH nanosheets, which promoted esterification of free fatty acids and transesterification of triglycerides in microalgal lipids. Co-LDH nanosheets were dispersed on the HY zeolite surface through generated Si–O–Co bonds to enhance Co(OH)x (x = 2, 3) utilization, while the specific surface area of the catalyst increased from 107.9 m2/g (Co-LDH) to 272.5 m2/g. Therefore, the optimal catalyst promoted conversion efficiency from 87.8 to 96.1%, and the conversion efficiency remained at 87.6% after six reusability cycles.
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TRANSACTIONS OF TIANJIN UNIVERSITY
·
2018
·Vol. 24
·期 3
·201-211
·
IF 0
Wang Fumin,Liu Mengchao,Zhang Xubin,Lv Guojun,Sun Mingshuai
In this study, we designed and synthesized a novel battery-type electrode featuring three-dimensional (3D) hierarchical ZnO@Ni
x
Co 1− x (OH)
y
core/shell nanowire/nanosheet arrays arranged on Ni foam substrate via a two-step protocol including a wet chemical process followed by electro-deposition. We then characterized its composition, structure and surface morphology by X-ray diffraction, energy-dispersive X-ray spectrometry (EDS), X-ray photoelectron spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy, EDS elemental mapping. Our electrochemical measurements show that the ZnO@Ni 0.67 Co 0.33 (OH)
y
electrode material exhibited a noticeably high specific capacity of as much as 255 (mA·h)/g at 1 A/g. Additionally, it demonstrated a superior rate capability, as well as an excellent cycling stability with 81.6% capacity retention over 2000 cycles at 5 A/g. This sample delivered a high energy density of 64 W·h/kg and a power density of 250 W/kg at a current density of 1 A/g. With such remarkable electrochemical properties, we expect the 3D hierarchical hybrid electrode material presented in this work to have promising applications for the next generation of energy storage systems.
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JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Remah Sobhy,Jianing Zhang,Zhihua Li,Xiaobo Zou,Asad Nawaz,Noman Walayat,Salim Manoharadas,Yangyang Jia,Mahmoud Salah
We aimed at tabulating and characterizing a flavan-3-ol isolated from date seeds into date seed pills (DSP) as a commercial healthcare pill, and deeply studying their anti-glycoxidation impacts on bovine serum albumin using multi-dimensional approaches SDS-PAGE/NBT, UPLC-ESI-Q-TOF-MS, antiradical via Fenton-type reaction, multispectral, and molecular docking. Results showed that DSP were successfully tabulated (an encapsulation efficiency of 98.78 %) with high antioxidant values via noncovalently binding with whey proteins supported by FTIR and lib-dock results. DSP dose-dependently decayed fluorescent-AGEs by 16.77, 5.32, and 37.41 % in DSP500-BSA-G/MGO/GO models, respectively, later confirmed by SDS-PAGE and initial precursors mitigation results. The docking results confirmed that DSP could bind with glycoxidation sites of BSA-subunits, namely Lys431, Arg458, and Arg196 via H-bonds. DSP trapped both di-carbonyls and reduced CML-level, where new adducts such as epicatechin-mono/MGO-GO, were identified. 500 µg mL −1 DSP reduced OH-induced fluorescence intensity of AGEs by 43.32 % in BSA-G/Fe 2+ /H 2 O 2 . Our results open a new direction for upcycling by-products as effective glycoxidation inhibitors in a type of healthcare pills in protein-rich models.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Xiaojin Yin,Wenhao Xi,Pan Wang,Tongchen Wu,Peide Liu,Bifen Gao,Yun Zheng,Bizhou Lin
It is crucial to develop highly active and durable bifunctional electrocatalysts toward oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) for rechargeable Zn-air batteries. Herein, we report a facile approach to synthesize 2D β-Co(OH) 2 nanosheets supported on 1D nitrogen-doped carbon nanotubes through a hydrothermal in-situ growth strategy of Co nanoparticles encapsulated N-doped carbon nanotubes and urea. The as-obtained Co(OH) 2 /NCNTs displays excellent bifunctional activity with a high half-wave potential of 0.85 V vs. RHE for ORR, a low overpotential of 312 mV at 10 mA cm −2 for OER, and a low potential gap of 0.69 V. Density function theory calculations show that the synergistic effort between doped carbon and β-Co(OH) 2 reduces the energy barriers of the rate determining steps for the former toward ORR and for the latter toward OER, contributing to the superior bifunctional catalytic performance. The assembled Co(OH) 2 /NCNTs- based battery performs a high specific capacity of 883 mAh g Zn -1 and remarkable cycle stability. This presented in-situ construction strategy provides an attractive rational design method for preparing carbon-based bifunctional electrocatalysts.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Neng Chen,Sai Che,Yu Yuan,Hongchen Liu,Na Ta,Guohua Li,Feng Jiang Chen,Guang Ma,Bo Jiang,Ni Wu,Weiqi Yu,Fan Yang,Yongfeng Li
Transition metal phosphide (TMP) emerges as a promising electrocatalyst for overall water splitting (OWS). However, conventional TMP materials require exogenous metal ions to participate in coordination reactions, which usually suffer from active site blocking, pronounced intrinsic impedance, and inevitable catalyst shedding at high current density. Herein, a novel in-situ construction strategy has been developed to grow N -doped carbon (NC) enwrapped Co/CoP nanosheets directly onto Co foam (abbreviated as CoF) through a three-step transformation of Co to Co(OH) 2 to Co-Metal-Organic Framework (Co-MOF) to Co/CoP/NC. In the entire preparation process, Co metal is only provided by the CoF substrate without external metal sources. Such in-situ construction yields tight contact at the interface of the heterogeneous catalyst, leading to much-reduced impedance and boundary vacancy, while the porous nitrogen-doped carbon backbone further endows the catalyst with the exposure of massive active sites, promotes mass transfer, and possesses high electrical conductivity. The Co/CoP/NC/CoF requires overpotentials of only 64 mV/263 mV@10 mA cm −2 and 414 mV/481 mV@400 mA cm −2 for both HER/OER in 1.0 M KOH, respectively. Remarkably, it reveals excellent OWS catalytic activity with a cell voltage of 1.56 V@10 mA cm −2 and 1.88 V@200 mA cm −2 . This strategy of in-situ interface engineering transformation provides new ideas for direct device processing and construction of highly-efficient transition-metal-based OWS electrode materials.
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PubMed
高影响因子
TALANTA
·
2025
·
IF 6.1
Bingchu Li,Zhenni Liu,Nijiao Qin,Binghui Li,Zhiyang Chen,Ziyang Li,Xing Lyu,Li Tan,Zhe Guo,Weimin Wu,Zhongyuan Xiang,Zhendong Liu,Qichen Long,Min Hu
Angiotensin I and II (Ang I, Ang II), aldosterone (ALD), 18-hydroxycorticosterone (18-OHB), 18-hydroxycortisol (18-OHF), and 18-oxocortisol (18-OXOF) are critical biomarkers for the screening, confirming, and subtyping of primary aldosteronism (PA). Liquid chromatography-tandem mass spectrometry (LC-MS/MS) enables simultaneous quantification of multiple analytes; however, obstacles such as labor-intensive manual procedures, complex biological matrices, structural analog interference, and the physicochemical diversity of target analytes limit its application and promotion in clinical laboratories. This study established and validated a robust LC-MS/MS method based on automated magnetic-bead-assisted sequential extraction (MBASE) for the simultaneous detection and quantitation of Ang I, Ang II, ALD, 18-OHB, 18-OHF, and 18-OXOF. The method achieved complete chromatographic resolution with no interference from endogenous hormones or exogenous medications. The analytical recoveries ranged from 86.14% to 112.89%, with total imprecisions between 2.93% and 12.89%. The MBASE demonstrated a strong correlation with traditional SPE for all six analytes (R: 0.967–0.997), with biases ranging from -4.0% to 5.1%. Compared to traditional SPE process, the MBASE workflow reduced total processing time by 46% and manual handling time by 77%. The clinical application of this LC-MS/MS method indicated that Ang I and Ang II are effective screening biomarkers, and ALD, 18-OHB, 18-OHF, and 18-OXOF could be used to differentiate PA subtypes. Overall, the newly developed MBASE-LC-MS/MS method exhibits excellent performance and significant advantages for PA diagnosis. It can be a promising tool in the early screening and subtyping for PA and enhance automated mass spectrometry processes in clinical application.
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PubMed
高影响因子
WATER RESEARCH
·
2022
·
IF 13.4
Zhen Wang,Yangyi Yu,Qin Guo,Chaoting Guan,Jin Jiang
Multiple reactive intermediates have been proposed to be involved in peroxydisulfate (PDS) activation by zerovalent iron (ZVI), including sulfate radical (SO 4 ·− ) produced via iron-oxide shell mediated electron transfer, ferryl ion species (Fe(IV)) formed from Fe(II)-PDS interaction, and hydroxyl radical ( · OH) generated by ZVI aerobic oxygenation. In this study, evolution of the relative role of these intermediates in microscale and nanoscale ZVI (mZVI vs. nZVI) activated PDS processes is comparatively investigated by using a methyl phenyl sulfoxide (PMSO) probe that selectively reacts with Fe(IV) to produce methyl phenyl sulfone (PMSO 2 ). Interestingly, during PMSO transformation by mZVI/PDS process, yields of PMSO 2 (η(PMSO 2 )) exhibit three-stage behavior that they first increase to a maximum (∼80% but lower than 100%) (Stage I) and then plateau for a period (Stage II) followed by a decrease phase (Stage III). Accordingly, the relative role of Fe(IV) in PMSO transformation is unceasingly improved in Stage I and subsequently reaches equilibrium with that of free radicals in Stage II, while it finally decreases in Stage III. Similar η(PMSO 2 ) evolution trends are obtained in nZVI/PDS process, except that the η(PMSO 2 ) increase in Stage I is negligible, possibly due to the exceptional fast nZVI dissolution. It was further clarified by tert -butyl alcohol scavenging assay that, in addition to Fe(IV), the free radical involved in Stages I and II is SO 4 ·− , while · OH was dominant in Stage III. Moreover, studies on O 2 effect reveal that ZVI aerobic oxygenation participates in mZVI corrosion during the entire process, while it is only involved in nZVI corrosion when PDS content is reduced to a low concentration, indicating that the reactivities of PDS and O 2 are similar in mZVI corrosion, but differ greatly in nZVI corrosion. Additionally, effects of reactant dose and pH on η(PMSO 2 ) evolution are also explored. Dynamics of the relative role of different reactive oxidants should be taken into account in further applications of ZVI/PDS in situ chemical remediation technology considering their different chemistries.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Lifen Wang,Yonggang Liu,Yinjun Lin,Xueying Zhang,Yonghao Yu,Ruiqin Zhang
Enhancing the effective contact between heterogeneous interfaces and accelerating photo-generated charge separation is the focus of current photocatalysis research. Herein, a novel Z-scheme Cu 2 (OH) 3 F/Bi 2 WO 6 (CFO/BWO) heterojunctions with intimate hetero-surface contact were successfully synthesized via electronic coupling of the surface hydrogen bonds. The optimal proportion of 25%CFO/BWO displayed outstanding photocatalytic performance among the removal of tetracycline hydrochloride (TC-HCl). The excellent catalytic effect comes from the construction of the Z-Scheme heterojunction, which accelerates the separation of photogenerated carriers, and the linking of hydrogen bonds between different planes providing more charge transfer channels. Moreover, explored the main active substances in the reaction process and tested the stability of the as-prepared samples, and the charge transfer law and degradation mechanism in the Z-scheme heterojunction are discussed in detail. This work provides a new way to construct heterojunctions with more adequate hetero-surface contact and faster charge transfer capabilities.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Xinqian Li,Bo Li,Shuqi Li,Yaping Dong,Dandan Gao,Zhengrong Niu,Wu Li,Haitao Feng
Removing impurities from hexavalent chromium system without secondary pollution is the key to the successful development of green chromate production technology. Here, hydrated chromium oxide CrO x (OH) 3-2x with lamellar cluster microsphere structure was prepared by in-situ hydrothermal method and used to simultaneously adsorb Si (IV) and V (V) in high concentration Cr (VI) solution. In the in-situ hydrothermal process of pH 7, 160 ℃ for 8 h, the Si (IV) and V (V) removal rates of the actual chromate production Na 2 Cr 2 O 7 -Na 2 SiO 3 -NaVO 3 -H 2 O solution can reach 92.27 % and 94.81 %, respectively, which is higher than the ex-situ removal efficiency of Si (IV) (62.88 %) and V (V) (63.16 %) under the same conditions. Further characterization of STEM-elemental mapping, XPS and FT-IR results indicate that during in-situ adsorption, Si (IV) and V (V) are mainly adsorbed on the surface of CrO x (OH) 3-2X adsorbent by interacting with surface hydroxyl groups. More importantly, the simultaneous formation and adsorption of the adsorbent are more conducive to the full utilization of active adsorption sites on the adsorbent surface. After that, CrO x (OH) 3-2x was converted into nano Cr 2 O 3 with a purity of 97.87 % by simple desorption and calcination processes. In addition, the results of UV–vis DRS and SEM show that the residual Si and V elements in Cr 2 O 3 unexpectedly increase the size of the particles to about 300 nm, which redshifts the absorption band of the blue region by 3.3 nm. This results in more red absorption and makes Cr 2 O 3 more yellowish-green and exhibits excellent pigment properties. Thus, the in-situ synthesis, synergistic adsorption and green conversion of trivalent chromium adsorbent provide a promising and sustainable technology for the purification of high concentration Cr (VI) solution that avoids the discharge of Cr (VI) containing slag.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Liye Shuai,Qun Li,Jia Liu,Jiabin Wu,Xinning Huang,Jianglong Yu,Jinxiao Dou,Huaiguang Li,Xingxing Chen
The rational design of efficient photoanodes is essential for advancing solar-driven water oxidation. This study addresses the intrinsic challenges of bismuth vanadate (BiVO 4 ), such as sluggish charge kinetics and severe surface recombination, through the construction of a ternary composite photoanode via synergistic interfacial modification and cocatalyst integration. A hierarchical architecture was fabricated through sequential low-temperature chemical bath deposition and electrodeposition, integrating a CoFe-layered double hydroxide (CoFe-LDH) interlayer and nickel-hydroxynitrate (Ni 2 (NO 3 ) 2 (OH) 2 ) onto BiVO 4 substrates. The optimized BiVO 4 /CoFe-LDH@Ni 2 (NO 3 ) 2 (OH) 2 photoanode achieves a photocurrent density of 5.57 mA/cm 2 at 1.23 V vs. reversible hydrogen electrode (V RHE ) under Air Mass 1.5 Global (AM 1.5G) illumination, accompanied by a 251 mV cathodic shift in onset potential. Comprehensive characterizations-including X-ray photoelectron spectroscopy (XPS), open-circuit photovoltage (OCP) decay, time-resolved photoluminescence (TRPL) decay, electron paramagnetic resonance (EPR) and Kelvin probe force microscopy (KPFM)-reveal that the oxygen vacancy (O v )-rich CoFe-LDH@Ni 2 (NO 3 ) 2 (OH) 2 layer facilitates efficient charge transfer within BiVO 4 and generates a pronounced built-in electric field, thereby significantly enhancing interfacial charge separation. Concurrently, density functional theory (DFT) calculations demonstrate that the interfacial effect of CoFe-LDH@Ni 2 (NO 3 ) 2 (OH) 2 substantially lowers the thermodynamic barrier for the oxygen evolution reaction (OER). This study offers fundamental insights for fabricating high-efficiency BiVO 4 -based photoanodes.
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POLYMER DEGRADATION AND STABILITY
·
2025
·
IF 7.4
Xiaoyuan Liu,Jia Liu,Wenqing Ge,Zhihui Lv,Li Dang
To enhance the flame-retardant and smoke-suppression efficiency of magnesium oxysulfate whiskers (MOSw) in flexible polyvinyl chloride (fPVC), a hierarchical MOSw@PDA@Fe(OH) 3 nanohybrid with scaly Fe(OH) 3 decoration was designed. With only 0.23 wt % Fe element incorporating, the fPVC/MOSw@PDA@Fe(OH) 3 composite attains a UL-94 V-0 rating with 28.2 % and 57.9 % reductions in peak heat release rate and peak smoke release rates, respectively, compare to the fPVC/MOSw composite. Thermogravimetric analysis (TGA) indicates that both PDA and Fe(OH) 3 accelerate the decomposition of the third degradation step of MOSw, increasing the non-flammable gas, enhancing heat absorption and cooling the matrix. Concurrently, most of the Fe compounds are migrated into the gas phase, scavenging ·H and ·OH radicals and catalyzing the thermal oxidation of soot. TGA results also show that tiny Fe compounds (only 0.05 wt % of Fe element) in the condensed phase effectively catalyze dehydrochlorination of fPVC at lower temperatures, promoting trans-conjugated polyene formation and crosslinking into more and denser char layer. Hydrogen bonding between Cl atoms of PVC and hydroxyl/amino groups of PDA strengthen the interfacial adhesion, leading to increases in tensile strength and modulus. Simultaneously, the whisker morphology of MOSw facilitate crack deflection and energy dissipation, yielding an 85.27 % increase in impact strength. This structural design maximizes filler efficiency with minimal loadings, balancing fire safety and mechanical strength in composites.
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高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2011
·Vol. 13
·期 10
·1119-1122
·
IF 4.287
Dongling Jia,Fenfen Li,Linfeng Sheng,Qiaoqiao Ren,Song Dong,Shanling Xu,Ying Mu,Yuqing Miao
A facile strategy was reported to synthesize and assemble a stable ultrathin film of Ni(OH) 2 nanoparticles at gas/liquid interface where the aqueous phase contained Ni 2+ and the organic phase was composed of triethylamine toluene solution. The ultrathin film of Ni(OH) 2 nanoparticles that precipitated at the interface was transferred onto the electrode surface for the electrocatalysis of bio-thiols and selective electroanalysis of cysteine. The preparation of Ni(OH) 2 ultrathin film and its transfer to an electrode substrate is very simple. The obtained Ni(OH) 2 ultrathin film modified electrodes are stable, showing high electrochemical oxidation toward bio-thiols and good selectivity toward cysteine in phosphate buffered solution of pH 7.5.
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高影响因子
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