JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
·
IF 9.4
Chenhan Xiong,Wei Cao,Jiaqi Chen,Yanqiu Yu,Xinming Lian,Rui Xue,Nan Chen,Zhaoyang Fan,Guoping Du
Designing rational heterostructures of high-performance electroactive materials on conductive substrates with hierarchical structures is critical for advancing electrochemical energy storage technologies. In this study, a unique spatial structure is fabricated by vertically aligning two-dimensional (2D) structures of Co-ZIF-L on conductive nickel foam (NF) substrate through interruption of ZIF-67 formation. This is followed by an innovative electrochemical synthesis method that disrupts unstable surface coordination bonds in Co-ZIF-L, enabling the in-situ generation of Co(OH) 2 . The resulting Co(OH) 2 @ZIF-L/NF binder-free electrodes feature a hierarchical spatial structure and are synthesized in approximately 30 s. These electrodes showcase exceptional area capacity of 3.1 C cm −2 at 1 mA cm −2 , attributed to their high specific surface area and layered architecture that promotes electrolyte penetration. Density Functional Theory (DFT) calculations reveal that the Co(OH) 2 @ZIF-L nanostructures have superior electrical conductivity compared to the individual components. Furthermore, a hybrid supercapacitor (HSC) based on Co(OH) 2 @ZIF-L/NF//AC exhibits an impressive energy density of 42 Wh kg −1 at a power density of 184.7 W kg −1 . This research provides new insights into the efficient synthesis of high-performance electroactive materials with unique spatial structures and expands the potential applications of ZIF materials.
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高影响因子
Materials
·
2024
·Vol. 17
·期 19
·4762
·
IF 3.1
Zhiyuan Song,Zainab Bibi,Sidra Chaudhary,Qinxiang Jia,Xiaoyong Li,Yang Sun
A water-soluble ternary copolymer bearing carboxyl, sulfonic, and amide functional groups was synthesized using ammonium persulfate-catalyzed free radical polymerization in water, resulting in high monomer conversion. This copolymer was then complexed with aluminum sulfate, forming an admixture containing Al(SO 4 )(OH)·5H 2 O, which was subsequently combined with silica gel. Characterization revealed that the synthesized copolymer formed a large, thin membrane that covered both the aluminum compounds and the silica gel blocks. The introduction of this complex admixture, combining the copolymer and aluminum sulfate, not only reduced the setting times of the cement paste but also enhanced the mechanical strengths of the mortar compared to using aluminum sulfate alone. The complex admixture led to the formation of katoite, metajennite, and C 3 A (tricalcium aluminate) in the mortar, demonstrating significant linking effects, whereas pure aluminum sulfate could not completely transform C 3 S within 24 h. Further addition of silica gel to the complex admixture further shortened the setting times of the paste, slightly reduced compressive strength, but improved flexural strength compared to the initial complex admixture. The silicon components appeared to fill the micropores and mesopores of the mortar, accelerating cement setting and enhancing flexural strength, while slightly decreasing compressive strength. This study contributed to the development of new cementing accelerators with improved hardening properties.
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CONSTRUCTION AND BUILDING MATERIALS
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2025
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IF 8
Jiachen Zhu,Lijuan Li,Lianmin Ji,Shengjie Lan,Shaojie Tao,Donghai Zhu
The preparation of high-performance epoxy resins (EP) with enhanced mechanical properties and flame retardancy for building materials has long been a significant challenge. In this study, bio-based phytic acid (PA) was intercalated into the layers of layered double hydroxides (LDH) via coprecipitation. Subsequently, ultrafine Fe(OH) 3 was in situ grown on PA-intercalated LDH through tannin-mediated assembly, resulting in the synthesis of the LDH-PA@TA-Fe(OH) 3 hierarchical hybrid flame retardant. Comprehensive characterization of its microstructure, morphology, and chemical composition was performed. The EP composite demonstrated a LOI of 31.3 % and a UL-94 V-1 rating when the additive of 7.5 wt% LDH-PA@TA-Fe(OH) 3 was utilized. Additionally, the EP/LDH-PA@TA-Fe(OH) 3 composite demonstrated a substantial reduction in peak heat release rate (pHRR) and peak smoke production rate (pSPR) with reductions of 48.1 % and 52.7 %, respectively, along with a 62.5 % decrease in peak CO production rate (pCOP), compared to neat EP. These improvements in fire safety are primarily ascribed to the synergistic flame retardancy of LDH and Fe(OH) 3 in condensed and gas phases, along with the efficient catalytic charring performance of PA and Fe 3+ . Furthermore, the incorporation of LDH-PA@TA-Fe(OH) 3 enhanced the mechanical properties of EP, which could be ascribed to the improved dispersibility of the modified LDH and the strengthened interfacial interaction. This study introduces a novel approach for the development of highly effective LDH-based hybrid flame retardant materials, enabling the fabrication of EP composites with superior mechanical performance and fire safety.
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JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2012
·Vol. 12
·期 6
·4607-4612
·
IF 1.563
Qi Xiaoxue,Zhou Shilin,Chen Jianrong,Wu Jiuyang,Gao Minghui,Zhang Shanqing,Miao Yuqing
A simple strategy for the preparation of a Ni(OH)2 nanoparticle film is described. Ni(OH)2 nanoparticles were synthesized in an aqueous solution of Ni2+ and tert-butylamine in the presence of small amounts of toluene, which induced the nanoparticles
to assemble a thin film on the aqueous surface. The obtained Ni(OH)2 nanoparticle film was easily transferred onto the electrode surfaces and exhibited stable electrochemical performance. The electrochemical behavior of various small biomolecules, including cysteine, homocysteine,
glutathione, histidine, glycine, cystine, methionine, lysine, aspartic acid, glutamic acid, phenylalanine, ascorbic acid, uric acid and dopamine, were studied at the Ni(OH)2 nanoparticle-film-modified electrode. The Ni(OH)2 nanoparticle film exhibits excellent direct,
unmediated electrocatalysis toward the oxidation of cysteine, homocysteine and ascorbic acid in a pH 7.4 buffer solution with a low onset potential and a high oxidation signal. This behavior differs from many reports in which small organic molecules are electrocatalyzed indirectly by the Ni(OH)2/NiOOH
redox couple in a strongly alkaline solution.
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高影响因子
CHEMISTRY OF MATERIALS
·
2024
·
IF 7.2
Huan Pei,Luyong Zhang,Huanhuan Cheng,Shibin Wang,Zhihua Yang,Fangfang Zhang,Shilie Pan
Four hydroxyfluorooxoborates, α-K2[B3O3F4(OH)] (I), β-K2[B3O3F4(OH)] (II), Cs(NH4)3[B3O3F4(OH)]2 (III), and RbCs5[B3O3F4(OH)]3 (IV), with identical fundamental building block (FBB) [B3O3F4(OH)]2–, were obtained successfully and characterized comprehensively. A phase transition between I and II was detected, which led to a space group evolution from centrosymmetric to noncentrosymmetric. The F– and OH– substitution effect was studied based on II and its hydroxyborate derivative K2[B3O3(OH)5], which reveals the corresponding changes in the band gap and the nonlinear optical properties. In addition, the cationic-size effect on the arrangement of the [B3O3F4(OH)]2– FBBs and the birefringent properties were discussed for the title compounds. This study contributes to the advancement of structural chemistry and sheds some light on the structure–property relationship studies of hydroxyfluorooxoborates.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Caiyu Rong,Xiang Dong,Shidai Zhang,Shuqin Ding,Zhaoxin Zhang,Yan Ma,Zixin Lin,Yuhe Song,Jiayi Zhang,Shibin Nie,Konghu Tian
Inspired by Viper scales, a cotton-based smart textile named PMCOT has been developed. • PMCOT exhibits thermosensitive properties, enabling graded fire alarm. • PMCOT demonstrates piezosensitive properties, achieving body language recognition and remote control. To address the challenge of simultaneously achieving superior fire resistance and intelligent sensing in next-generation firefighting suits, we herein report a viper scale-inspired organic-inorganic hybrid smart armor, PPy@M(OH)(OCH 3 ) (M = Co, Ni), which was further utilized to fabricate a cotton-based smart fabric, PMCOT. PMCOT exhibits excellent flame resistance, thermosensitivity, and piezosensitivity. Specifically, it withstands 1300 °C flame jet for over 60 s while maintaining structural integrity; its peak heat release rate was reduced by 87.38% compared with pure cotton, and the residual mass reached 41.6% after thermal decomposition. Endowed with a piezoresistive sensing mechanism, PMCOT realized real-time resistance monitoring of shoulder, elbow and knee joints, capturing distinguishable signals for typical firefighting postures. It also achieved graded fire alarm via thermosensitive resistance variation (37.2–95.9 °C). In addition, PMCOT can capture finger joint signals of firefighters and operate a robotic arm remotely with stable cyclic performance. PMCOT possessed excellent comprehensive wearable performance with increased elongation at break (27.6%), only 4.8% lower water vapor transmission rate than cotton, and high-efficiency antibacterial performance. The bionic strategy proposed in this study provides critical support for the design of fireproof smart fabrics and the development of next-generation intelligent firefighting suits. Download: Download high-res image (293KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yukai Huang,Haoyang Zhong,Tong Zou,Bin Zhang,Linlin Yu,Wenyu Wang,Shijie Zhang,Ruoyu Chen,Qian Jia
In this work, a superhydrophobic magnetic photothermal flame-retardant polyurethane sponge (AH/Fe-MOF-P@Fe 3 O 4 @PA@PU) with efficient oil–water separation performance was prepared. After coating the polyurethane sponge with a phytic acid (PA) film, the new honeycomb-like “three-in-one” flame-retardant AH/Fe-MOF-P and magnetic nanoparticle Fe 3 O 4 were firmly bound to the sponge by polydimethylsiloxane (PDMS). AH/Fe-MOF-P@Fe 3 O 4 @PA@PU exhibited excellent superhydrophobicity (with a water contact angle of 155.3°), an oil–water separation efficiency of up to 99%, outstanding recyclability, and environmental stability. Utilizing its magnetic properties, it can be applied to special and complex oil spill treatments. The AH/Fe-MOF-P@Fe 3 O 4 @PA@PU composite exhibited exceptional photothermal properties and demonstrated highly efficient adsorption capabilities for high-viscosity crude oil. Furthermore, the modified sponge possessed remarkable flame-retardant properties, exhibiting the ability to self-extinguish within 2 s following ignition. The superhydrophobic magnetic flame-retardant polyurethane sponge has great potential as an effective oil spill remediation material.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2026
·
IF 21.1
Xingyu Han,FangFang Liu,Hanxiao Wang,Yangjing Liu,Shuhui Huo,Min Wang,Jianwei Ren,Xuyun Wang,Hongbing Song,Jian Liu,Rongfang Wang
Ni(OH) 2 /NF demonstrates strong electrocatalytic performance in the oxidation of 1-methoxy-2-propanol (MOP) to 1-methoxy-2-propanone (MOA). However, its catalytic efficiency is restricted by two sluggish dehydrogenation stages: the oxidation of Ni 2 + –OH to generate the active Ni 3+ –O intermediate, and the abstraction of the α-hydrogen from the MOP molecule. To address these limitations, the present study introduces a strategy centered on tuning the electronic structure. By incorporating manganese (Mn) into the coordination structure of Ni(OH) 2 /NF nanosheets in a controlled manner, both reaction steps are effectively enhanced through synergistic effects. X-ray photoelectron spectroscopy (XPS) and synchrotron-based X-ray absorption fine structure (XAFS) analyses reveal that Mn incorporation modifies the local electronic environment of Ni through electronic interactions. This adjustment decreases the d -orbital electron density of Ni, thereby facilitating the oxidation of Ni 2+ to the catalytically active Ni 3+ species during MOP conversion. Electrochemical measurements combined with density functional theory (DFT) calculations indicate that Mn incorporation markedly enhances the adsorption of MOP molecules on the catalyst surface, which thereby promotes more efficient reaction kinetics. This synergistic regulation effectively lowers the energy barrier associated with the dual dehydrogenation steps, resulting in markedly improved catalytic performance of Mn–Ni(OH) 2 /NF for MOP oxidation, with the product Faradaic efficiency reaching around 90 %.
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CHINESE JOURNAL OF CATALYSIS
·
2025
·
IF 17.7
Pengkun Zhang,Qinhan Wu,Haoyu Wang,Dong-Hau Kuo,Yujie Lai,Dongfang Lu,Jiqing Li,Jinguo Lin,Zhanhui Yuan,Xiaoyun Chen
Herein, we established a Zn 3 (OH) 2 (V 2 O 7 )(H 2 O) 2 /V-Zn(O,S) Z-scheme heterojunction (labeled ZnVO/V-Zn(O,S) with a heterovalent V 4+ /V 5+ states and oxygen vacancies in both phases via a one-step in-situ hydrolysis method. The NaBH 4 regulated the ZnVO/V-Zn(O,S)-3 with rich Vo and suitable n (V 4+ )/ n (V 5+ ) ratio achieved an excellent photocatalytic nitrogen fixation activity of 301.7 μmol/(g·h) and apparent quantum efficiency of 1.148% at 420 nm without any sacrificial agent, which is 11 times than that of V-Zn(O,S). The Vo acts as the active site to trap and activate N 2 molecules and to trap and activate H 2 O to produce the H for N 2 molecules photocatalytic reduction. The rich Vo defects can also reduce the competitive adsorption of H 2 O and N 2 molecules on the surface active site of the catalyst. The heterovalent vanadium states act as the photogenerated electrons, quickly hopping between V 4+ and V 5+ to transfer for the photocatalytic N 2 reduction reaction. Additionally, the Z-scheme heterojunction effectively minimizes photogenerated carrier recombination. These synergistic effects collectively boost the photocatalytic nitrogen fixation activity. This study provides a practical method for designing Z-scheme heterojunctions for efficient photocatalytic N 2 fixation under mild conditions.
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HYDROMETALLURGY
·
2019
·
IF 3.465
Jishen Li,Xiyun Yang,Yuyao Fu,Haiqiang Huang,Zhijie Zhong,Yuanyuan Wang
A comprehensive utilization process of Fe, Mn, Ni and Co in the acid leaching liquor of spent lithium ion batteries was put forward. Fe and part of Mn were extracted to synthesize Fe-doped lithium ion-sieve. Ni, Co and the rest of Mn were coprecipitated to prepare ternary lithium ion battery cathode material precursor Ni x Co y Mn 1-x-y (OH) 2 . After removing Cu 2+ ions in acid leaching liquor by adding MnS, two-stage counter current extraction and one-stage stripping were used to extract all Fe 3+ and 40.3% of Mn 2+ ions in sulfuric acid leaching solution to obtain a MnSO 4 stripping solution containing Fe 3+ ions. Iron-doped lithium ion-sieve was synthesized by oxidation of the resulting MnSO 4 solution with KMnO 4 followed by roasting and acid leaching. Fe incorporates into the lattice of lithium ion-sieve and improves the structure stability. Fe-doped lithium ion-sieve shows Li adsorption capacity of 35.29 mg.g −1 and Mn dissolution loss of 1.66%. The Li + adsorption in salt lake brine with the Fe-doped ion-sieve follows a pseudo-second-order kinetic model . Ni x Co y Mn 1-x-y (OH) 2 is regular spherical particles with β-Ni(OH) 2 -like structure. This process provides a simple method for recovery and utilization of Mn, Fe, Ni and Co in spent lithium ion batteries .
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Ruoyi Li,Jian Zhang,Dong Liu,Haina Bai,Chuntao Zhu,Xinyan Wang,Jia Li
In conventional Electro-Fenton systems, the oxidation process dominated by the Fe 2+ /Fe 3+ cycle and · OH radicals, although effective in degrading organic pollutants, is still limited by a narrow pH applicability range (2–4). To address this challenge, a coral-like ZnO nanospheres modified Cu(OH) 2 @CF composite electrode was synthesized in this study, which significantly broadened the applicable pH range (2–10). The ZnO/Cu(OH) 2 @CF composite electrode enhanced the selective generation of single-linear oxygen ( 1 O 2 ) and overcame the inherent defects, such as the extremely short lifetime of · OH (<1 μs), while enabling the efficient in situ generation of H 2 O 2 (272.51 mg/L, 30 min). And the complete degradation of tigecycline (TGC) was realized within 30 min with an operating cost of only 0.044 ¥·m −3 (energy consumption 0.076 kWh·m −3 ). and a low Tafel slope of only 24.80 mV·dec -1 is required for an efficient Electro-Fenton reaction. Notably, the ZnO/Cu(OH) 2 @CF composite electrode exhibited high degradation rates for a variety of typical antibiotics and could be adapted to different water quality conditions. After 10 cycles of use, its degradation rate of TGC was still as high as 92.67 %. The continuous flow reactor not only maintained more than 90 % degradation efficiency for TGC after 300 min of operation, but also maintained a high degradation rate of 80 % for mixed antibiotic wastewater. The dominant mechanism of action of 1 O 2 was deeply analyzed by bursting experiments and electron paramagnetic resonance (EPR). The two-dimensional correlation spectroscopy (2DCOS), three-dimensional fluorescence spectroscopy (3DEEMs) and liquid chromatography-mass spectrometry (LC-MS) techniques were used to reveal the degradation pathways of the pollutants and the toxicity evolution of the intermediates.
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Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 21
·10064-10073
·
IF 9.931
Jiahui Kang,Jiali Sheng,Jinqi Xie,Huangqing Ye,Jiahui Chen,Xian-Zhu Fu,Guoping Du,Rong Sun,Ching-Ping Wong
Developing highly efficient and low-cost oxygen evolution reaction (OER) electrocatalysts is highly demanded, as the OER is recognized as a key half-reaction in water splitting for producing hydrogen; however, this still remains a great challenge. Herein, we design three-dimensional (3D) tubular hierarchical core–shell electrocatalysts for the OER using a simple and highly controllable two-step method. The large-scale tubular Cu(OH)2 arrays are directly grown on Cu foam (CF) at room temperature, followed by the growth of highly porous CoNi carbonate hydroxides (CH) via a low-temperature hydrothermal method on the walls of these Cu(OH)2 nanotubes (NTs). The hollow and open-structured core–shell hierarchical Cu(OH)2@CoNiCH NTs/CF electrode with a large surface area and numerous mesoporous and short diffusion paths can provide many active sites, fast electron transport and easy accessibility of water, leading to an excellent OER activity in an alkaline electrolyte with an overpotential of 288 mV and 326 mV at a current density of 30 mA cm−2 and 100 mA cm−2, respectively, also with robust durability. This new structure would open an avenue for the advancement of highly efficient OER electrocatalysts.
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