Results in Chemistry
·
2025
·
IF 4.2
Wei Zhang,Ku Yu,Wang Aihe
In this study, pyridine-a representative nitrogen-containing heterrocylic contaminant in coal chemical wastewater-was targeted for photocatalytic degradation. We developed a novel ternary composite photocatalyst through the in-situ integration of layered double hydroxide (LDH) and iron-based metal-organic framework (MIL-101(Fe)) with lanthanum‑iron co-doped TiO 2 via hydrothermal synthesis. These contaminants are characterized by high environmental persistence, low biodegradability, and potential teratogenic/carcinogenic risks. The synthesized LDH/MIL-101(Fe)/La-Fe-TiO 2 composite was systematically characterized using scanning electron microscopy (SEM), UV–Vis diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), and Brunauer-Emmett-Teller (BET) analysis. Key findings revealed that: (1) The composite architecture achieves an exceptional specific surface area of 168.96 m 2 /g through synergistic LDH/MIL-101(Fe) integration; (2) La–Fe co-doping effectively extends the photoresponse threshold of TiO 2 to the visible-light region. Under optimized conditions (25 °C, 300 rpm agitation, 400 W irradiation), the system achieved 96.1 % pyridine degradation (initial concentration: 100 mg/L) within 4 h, following pseudo-first-order kinetics (R 2 = 0.99). Remarkably, the catalyst maintained 94.5 % efficiency after five consecutive cycles, demonstrating superior stability. Mechanistic investigations combining GC–MS analysis, electron paramagnetic resonance (EPR) detection, and radical quenching tests identified the reactive species activity sequence as ∙ h + > ∙ OH > O 2 − , ultimately elucidating the complete pyridine mineralization pathway.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 3
·209
·
IF 5.4
Li Shaohui,Hao Sijia,Li Wen,Meng Ran,Wang Qiang,Wang Yuqing,Wang Lei,Liu Xinjing,Zhou Yuanyuan,Wang Haitong,Zhang Dongxia,Zhou Xibin
A ternary structure (CuO/CN/LDH) composed of LDH-anchored g-C 3 N 4 nanosheets loaded with CuO nanoparticles was successfully constructed via hydrothermal and co-precipitation methods, and a colorimetric sensing platform for hexavalent chromium (Cr(VI)) detection was proposed. The engineered nanomaterial demonstrates significantly enhanced oxidase-mimetic activity in the presence of Cr(VI), enabling rapid catalytic oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB) with distinct chromogenic response. Mechanistic investigations reveal that Cr(VI) facilitates the conversion of dissolved oxygen into superoxide anions via redox cycling, thereby accelerating TMB oxidation. The sensor exhibits exceptional analytical performance with high accuracy (recoveries of 97.3-103.8%) and sensitivity (detection limit of 25 nM) in aqueous sample analysis. The sensor demonstrated excellent selectivity against common interfering metal ions, as well as high stability (still above 95% for 8 weeks). Notably, an innovative paper-based analytical device was developed in conjunction with smartphone-assisted colorimetric detection, achieving on-site visual quantification of Cr(VI) within 15 min. This integrated system provides a field-deployable solution for environmental monitoring, combining operational simplicity with reliable detection capabilities. This study addresses the main limitations of Cr(VI) sensors, such as their dependence on complex instruments and poor stability of natural enzymes, and demonstrates low detection limits, excellent selectivity, and long-term stability. In addition, the proposed methodology advances current sensing technologies by merging nanomaterial engineering with portable detection platforms, demonstrating significant potential for heavy metal surveillance in water quality management. Based on this, this study also constructed a paper-based colorimetric detection sensor.
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EES Catalysis
·
2026
·
IF 9.8
Mingge Zhi,Jinan Niu,Chaoyao Yao,Ruixuan Zhang,Shunle Zhou,Sonehra Anjum,Fangfang Liu,Yihan Ling,Guiqing Liu,Guohua Fan,Arianit A. Reka,Farid Akhtar,Peizhong Feng,Hermenegildo Garcia
Developing efficient and durable oxygen evolution reaction (OER) electrodes for alkaline water electrolysis requires not only catalytically active components but also strong interfacial integration between the catalyst layer and the conductive substrate. Herein, we report a one-step hydrothermal route for constructing a six-metal NiZnCuCoMnFe LDH-based heterostructure directly on copper foam, denoted as M6-LDH/CF. Rather than forming an ideal homogeneous multimetal LDH phase, the synthesis produces an integrated architecture consisting of a six-metal LDH nanosheet framework, segregated Co/Mn-containing oxide or oxyhydroxide surface phases, and a reconstructed Cu/Cu₂O/CuO interfacial region derived from the substrate. Structural analyses indicate that differences in hydrolysis, oxidation, and precipitation behavior among the metal species, together with substrate oxidation under hydrothermal conditions, govern this non-ideal growth pathway. The optimized M6-LDH/CF electrode exhibits overpotentials of 181, 392, and 502 mV at 10, 50, and 100 mA cm⁻², respectively, and maintains stable operation at 50 mA cm⁻² for 100 h. Post-OER XPS further reveals pronounced surface-state evolution, including Cu oxidation, Zn leaching, and the formation of more metal–oxygen–metal coordination environments, indicating that M6-LDH/CF functions as a precatalyst architecture that evolves toward a more oxidized working state during operation. These results suggest that controlled non-ideal in situ growth can be used constructively to fabricate integrated multimetal OER electrodes with favorable activity and operational stability in alkaline media.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Jingjie Wang,Mingcong Tang,Xiaoli He,Shaoyang Zhen,Fir Dunkin,Zhaofeng Wu
The urgent need for advanced human-motion sensing in sports and healthcare drives the development of flexible piezoelectric sensors. This study introduces a high-performance, potentially eco-friendly sensor using ultrathin asymmetric ZnFe-LDH nanosheets and PDMS, exhibiting exceptional sensitivity with a pressure sensitivity of 2.316 mV/kPa and an ultra-low detection limit of 0.001 N, along with robust cycling stability (>10,000 cycles). It enables real-time monitoring of subtle motions like nodding and joint bending, and facilitates distinguishable detection of gait and hand gestures via insole and gesture recognition systems. A geometry-driven approach with hyperspherical embedding algorithm is employed for data processing, where multi-granularity temporal convolutions extract features mapped onto a hypersphere for angular similarity-based classification. This achieves 100% gesture and gait recognition accuracy via Geometry-Embedded algorithm. This work provides a low-cost, sustainable material platform and an algorithmic solution for flexible piezoelectric sensing in health monitoring and human-computer interaction, highlighting the transformative potential of ZnFe-LDH/PDMS composites for next-generation flexible electronics.
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Journal of Cleaner Production
·
2023
·
IF 11.1
Jiangfu Zheng,Changzheng Fan,Xiaoming Li,Qi Yang,Dongbo Wang,Abing Duan,Shuaijun Pan,Baowei Zhang,Jinglin Ding,Junwu Liu
A stable, efficient and pollution-free treatment system should be urgently developed to boost the application of green and sustainable photocatalytic materials in practical wastewater composite remediation. two-dimensional (2D) red phosphorus (RP)/ZnAl-LDH (Layered Double Hyroxides) photocatalyst photocatalysts were developed in this study. The optimized RPLDH0.8 (RP/ZnAl-LDH0.8)/Vis system was found with a high tetracycline hydrochloride (TC) degradation rate of 89% in 90 min. Moreover, the total organic carbon (TOC) removal rate was obtained as 21%. As indicated by the results of the experiments and characterization, the fast catalytic process arose from the S-scheme charge transfer pathway in RP/ZnAl-LDH. Furthermore, the liquid chromatography-mass spectrometry (LC-MS) and the radical capture assays were performed to investigate the probable TC photodegradation pathway and the primary reactive radicals in the photocatalytic process. The results of the bio-acute toxicity-based assays suggested that the RPLDH0.8/Vis system detoxified the transformation products . Lastly, the above RPLDH0.8/Vis system was found with high removal rates for other organic pollutants while showing high removal performance in different natural water bodies. Besides, the leaching concentration of total Zn in each of the five cycles of the degradation experiments was significantly lower than the national level discharge standard, suggesting that the RPLDH0.8/Vis system degraded TC without secondary heavy metal contamination. As revealed by the above findings, a novel strategy was proposed to prepare RP/ZnAl-LDH photocatalysts for the photocatalytic degradation of antibiotics.
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SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Xiao Jia,Yingying Wang,Junlei Tang,Kaikai Song,Hailong Zhang,Bing Lin,Hongpeng Zheng
Water electrolysis is a promising sustainable technology for hydrogen production . To achieve large-scale commercialization, electrocatalysts must meet specific performance requirements, such as low cost, high durability, and the ability for high-yield and high-quality production on a macroscopic scale. This study focuses on the preparation of self-supported electrodes for water splitting using stainless steel (SS) as the conductive carrier of the catalytic electrode. In alkaline conditions, FeNi-LDH@Ni films were grown on the surface of stainless steel, resulting in efficient and stable electrodes (FeNi-LDH@Ni/SS). The electrodes exhibited low overpotentials of 399 mV and 212 mV for the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively, to reach a current density of 10 mA cm −2 . Amplified electrodes with a surface area of 1 dm 2 were tested in an industrial environment of 6 M KOH at 60 °C. The two-electrode alkaline water electrolyzers (AWE) composed of the two FeNi-LDH@Ni/SS electrodes demonstrated excellent stability for 100 h and required only 1.744 V to reach a current density of 10 mA cm −2 . This study provides insight into the development of stable, efficient, and low-cost electrodes for industrial water splitting applications.
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Journal of Materials Chemistry A
·
2023
·Vol. 11
·期 17
·9546-9554
·
IF 11.9
Dongyan Gao,Renning Liu,Dandan Han,Pengcheng Xu,Ping Wang,Yen Wei
Engineering hierarchical heterostructure materials has been recognised as a challenging but prepossessing strategy for developing hybrid supercapacitors. Thus, a Ni–Co PBA derived 3D/1D heterostructure NiO/NiCo2O4 based layered double hydroxide on carbon cloth (CC/NiO/NiCo2O4/NiMn-LDH) as a battery-type electrode was successfully designed via a controllable hydrothermal method. The 3D Ni–Co PBA nanocubes served as scaffolds, providing more space for the nickel-cobalt precursors to grow and then calcine to form a continuous conductive layer of 3D/1D CC/NiO/NiCo2O4. Subsequently, 2D ultrathin NiMn-LDH nanosheets were uniformly anchored on 3D/1D NiO/NiCo2O4, resulting in a unique hierarchical structure that effectively addressed the restacking issue and dead volume of NiMn-LDH, contributing to increased charge and electron transport rates, which promoted the reaction kinetics. Benefiting from abundant interfaces with the open channels of the nanoarchitecture, the CC/NiO/NiCo2O4/NiMn-LDH electrode showed an exceptional specific capacity of 1593.0 C g−1 at 1 A g−1 and a desirable rate performance of 92.9% at a current density of 8 A g−1. Surprisingly, HSC devices can achieve an ideal specific energy of 44.28 W h kg−1 at a specific power of 108.22 W kg−1 with 97.59% cycling durability after 10 000 consecutive charge/discharge cycles. These remarkable properties indicate that the designed novel hierarchical heterostructure electrode has great potential for broad applications in electrochemical energy storage systems.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Shudong Wang,Yuhan Cui,Chenxi Zhao,Changhai Liang,Chuang Li
The hydrothermal stability of supported metal catalysts is one of the greatest challenges in the development of biomass conversion to chemicals and fuels. Herein, a hydrotalcite-based core–shell catalyst (Al2O3@NiMo-LDO) was synthesized by urea precipitation and ion-exchange methods, which could selectively convert bio-oil model compounds to liquid alkanes with high activity and selectivity and excellent hydrothermal stability at low pressure. In the hydrogenation of methyl palmitate, the catalyst afforded 81% conversion and 99% selectivity of n-pentadecane and n-hexadecane under low pressure, with excellent hydrothermal stability. The excellent catalytic performance of Al2O3@NiMo-LDO was attributed to the strong hydrogen activation ability, improvement of the utilization of active components under low pressure, and the increase in the number of active Mo5+ species. The superior hydrothermal stability was attributed to the core–shell structure, which avoided the influence of the specific surface area of Al2O3 that is reduced by the hydration reaction between Al2O3 and H2O at high temperature.
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MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
·
2023
·Vol. 74
·期 5
·754-765
·
IF 1.8
Xing Han,Yongqin Wang,Jia Hu,Tianbing Xiao,Jianjun Li
We reported the realization of superhydrophobic layered double hydroxide (LDH) coating with the double-anticorrosion mechanism on magnesium alloys. This coating was prepared via in-situ growth of LDHs on the etched AZ31 alloy and the modification was caused by 1H, 1H, 2H, 2H-perfluorooctyltrimethoxysilane. The water contact angle on the coating was as large as 161°, possessing the two-scale rough structure consisting of microislands and LDH crystal nanosheets. The excellent corrosion resistance properties of the superhydrophobic LDH coating can be attributed to the double-anticorrosion mechanism associated with LDH coating and superhydrophobic structure. In addition to the active protection of LDH coating, the passive protection of superhydrophobic coating can suppress the occurrence of ion-exchange reactions, leading to excellent corrosion resistance stability.
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CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Runjia Liu,Dan Xu,Yan Liu,Liang Wu,Qiwen Yong,Zhi-Hui Xie
The inherent micropores of micro-arc oxidation (MAO) coatings on magnesium alloy often cause poor long-term corrosion resistance . Herein, a low-porosity and high corrosion-resistant 8HQ/LDH/MAO composite coating , comprising a layered double hydroxide (LDH)-doped MAO primer and a top layer of 8-hydroxyquinoline (8HQ) inhibitor film, was deposited onto the magnesium alloy surface. Characterizations such as high-resolution field-emission transmission electron microscopy were performed to observe the synthesized nanoparticles’ morphology, size, composition, and structure. Results confirmed the successful synthesis of nitrate ion intercalated MgAl-LDH nanosheets and demonstrated the increase in thickness and denseness of the MAO coating after LDH doping. Based on electrochemical impedance spectroscopy and Tafel curves, the corrosion current density ( j corr ) of the newly fabricated 8HQ/LDH/MAO composite coating was reduced by about three orders of magnitude. The low-frequency impedance modulus (| Z | ƒ=0.1 Hz ) increased by nearly four orders of magnitude compared with that of bare Mg alloy. After 14 days of exposure to the corrosive electrolyte, the composite coating maintained a low j corr , showing significantly enhanced corrosion resistance compared with single MAO coating. These findings demonstrated the synergism of LDH doping with 8HQ sealing to enhance the corrosion protection of MAO coating on magnesium alloy.
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CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Qing Xin,Siqi Liu,Shixu Lu,Zhenyu Chen,Pengzhan Han,Shuaishuai Xin,Qianwen Wang,Guocheng Liu,Chengzhi Zhou,Yanjun Xin,Qinghua Yan
In this study, a fast and efficient Cu 2 Fe 0.5 Al 0.5 -LDH/PMS water purification system was constructed to degrade sulfamethoxazole (SMX). The optimized Cu 2 Fe 0.5 Al 0.5 -LDH/PMS reaction system degraded 50% SMX for only 0.5 min, and 98.25% SMX for 10 min. The advanced characterization techniques proved that the abundant hydroxyl groups of Cu 2 Fe 0.5 Al 0.5 -LDH can form ≡M−(O)OSO 3 − complexes with PMS, resulting in reactive oxygen species (ROS) and promoting SMX degradation. Moreover, the electron transfer between the active bimetallic components played a synergistic role in the generation of ROS species. Compared with the electron transfer degradation mechanism, ROS mechanism contributed more to SMX degradation, in which surface-bound SO 4 − was the dominated active species. The possible degradation pathway and intermediate toxicity of SMX were proposed. This work provided a strategy to fully explore the catalytic degradation mechanism of heterogeneous catalysts in wastewater purification.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yonghao Gan,Ying Ye,Xiaoping Dai,Xueli Yin,Yihua Cao,Run Cai,Xin Zhang
Exploring high-efficiency electrocatalysts for oxygen evolution reaction (OER) is one of the most important concerns to produce hydrogen in water electrolysis. Herein, the FNM/Co 2 P-0.4 heterostructure was designed as an electrocatalyst for the OER process by the combination of MoO 4 2− intercalating NiFe LDH and Co 2 P on nickel foam (NF). The surface reconstruction and MoO 4 2− leaching can induce the conversion of Co 2 P and NiFe LDH on FNM/Co 2 P-0.4 to generate Co/NiOOH with more oxygen vacancies. Beyond, CoOOH and NiOOH can also synergize to reduce the energy barrier of OER, optimize conductivity, and improve stability. The surface reconstruction and the formation of OOH ⁎ were further unveiled by in-situ UV–vis absorption spectra and Fourier-transformed alternative current voltammetry ( FTACV). The integration of interfacial synergies and oxygen vacancies can facilitate the adsorption/desorption of intermediates, regulate the d-band center, and expose more active sites. And as a result, FNM/Co 2 P-0.4 shows a significant low overpotential (240 mV) at 50 mA cm −2 , a small Tafel (74 mV dec −1 ), low activation energy ( E a ) and remarkable durability. This work provides a new pathway to improve the OER performance by using interfacial synergies and rich oxygen vacancies derived from the self-sacrificial reconstruction of heterostructured electrocatalysts.
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