Surfaces and Interfaces
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2026
·
IF 6
Ruoyun Gao,Zhinan Xia,Pengfei Li,Ruijuan Bian,Nianbo Zhang,Jingping Lu,Chunhuang Fan,Lifei Liu,Yang Deng
This study addressed the critical need for antibiotic pollution control in industrial wastewater by successfully constructing a two-dimensional/two-dimensional NiFe-LDH/C 3 N 4 Z-type heterojunction photocatalyst with strong chemical bonding through an innovative interfacial chemical engineering strategy. Thermal activation was used to expose N active sites on the C 3 N 4 surface, and in-situ growth of NiFe-LDH nanosheets was achieved via co-precipitation. Stable Ni-N and Fe-N coordination bonds were constructed at the heterojunction interface, forming an efficient interfacial charge transport channel that significantly suppressed the recombination of photogenerated carriers. Material characterization showed that the catalyst possessed a broadened visible light response, enhanced specific surface area, and optimized charge separation efficiency. Photocatalytic experiments demonstrated excellent degradation performance for fluoroquinolone antibiotics such as norfloxacin, ciprofloxacin, and ofloxacin. Norfloxacin achieved a 90% removal rate within 120 minutes, with good cycling stability. Mechanistic studies revealed that the degradation process is primarily driven by superoxide radicals (·O 2 - ). This work not only proposed a novel method for constructing heterostructures through "surface active site design and in-situ interface bonding", but also experimentally revealed the key role of interfacial chemical bonding in regulating band structure, promoting charge separation and enhancing material stability, providing important theoretical and practical basis for the rational design of efficient and stable photocatalytic materials under the guidance of surface and interface science.
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高影响因子
Materials Today Chemistry
·
2022
·
IF 7.613
Y. Chen,M. Yang,Y. Jia,P. Yan,F. Chen,J. Qian,L. Xu,H. Li
Photoelectrochemical (PEC) aptasensor based on photoactive species with remarkable and stable PEC response is a rising analytical method to implement highly efficient and sensitive detection of residual antibiotics in the field of food. Herein, NiS 2 /NiFe-layered double/graphitic carbon nitride (NiS 2 /NiFe LDH/g-C 3 N 4 ) ternary heterostructure designed by the surface vulcanization of flower-like NiFe LDH/g-C 3 N 4 was used for developing a label-free PEC aptasensing platform to detect enrofloxacin (ENR). The introduction of NiS 2 with narrow bandgap can strengthen the light harvesting of solar energy, producing large amounts of photoinduced carriers. NiS 2 as the electrons conduction bridge further accelerates the transmission efficiency of electrons in contrast to binary heterojunction, endowing ternary heterostructure with superior photocurrent signal. A label-free PEC aptasensor detected ENR with an amplified detection signal because of the oxidation of ENR molecules by photoinduced holes. This PEC aptasensing platform of ENR manifested a wide detection range from 3.6 × 10 −7 to 30 ng/mL with a low detection limit of 1.2 × 10 −7 ng/mL as well as can provide a sensitive and stable analysis with feasible application to monitor milk and honey samples. This design can open the utilization of ternary heterostructure by surface vulcanization to improve the sensitivity of PEC aptasensing platform for monitoring environmental pollutants.
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ACS Sustainable Chemistry & Engineering
·
2021
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IF 8.198
Baojin Chen,Muhammad Humayun,Yadong Li,Huaming Zhang,Huachuan Sun,Ying Wu,Chundong Wang
Exploration of highly efficient bifunctional electrocatalysts for optimal hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) has been widely carried out, though it still remains a big challenge. Herein, a hierarchical CoO–Co4N@NiFe-LDH (layered-double-hydroxides) heterostructure electrode anchored on nickel foam (NF) is prepared via a developed three-step hydrothermal–nitridation–electrodeposition pathway. The fabricated CoO–Co4N@NiFe-LDH/NF electrode needs low overpotential values of 66 and 231 mV to supply a current density value of 10 mA cm–2 in aqueous solution of KOH (1 M) for HER and OER, respectively. The Tafel slopes and electrochemical impedance spectroscopy results display favorable reaction kinetics throughout the electrolysis process. Subsequently, an alkaline electrolyzer is assembled with CoO–Co4N@NiFe-LDH/NF, which serves both as the anode and cathode, yielding 10 mA cm–2 with a small voltage of 1.529 V and showing a robust stability for 28 h. Impressively, a urine-mediated electrolysis cell shows efficient catalytic activity as well, allowing to mount the sluggish OER during water splitting. To drive the urine-mediated electrolysis cell containing 0.33 M urea, a low voltage of 1.393 V is required, which is about 136 mV lower compared to the urea-free electrolysis cell. This work presents a solid step for the electrocatalytic generation of hydrogen through water splitting by harvesting low energy.
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Sustainable Energy & Fuels
·
2021
·Vol. 5
·期 5
·1429-1438
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IF 6.367
Fu Liu,Xingzhong Guo,Yang Hou,Fan Wang,Chang Zou,Hui Yang
Electrochemical water splitting provides a prominent route towards clean energy conversion and storage, while unsuitable catalysts restrict its application. Core–shell hierarchical heterostructure materials with strong synergistic effects based on non-noble metal elements have been developed to compensate for inadequacy. In this work, a core–shell hierarchical heterostructure Co9S8/Ni3S2@NiFe-LDH electrocatalyst was prepared via hydrothermal and electrodeposition methods. The resultant Co9S8/Ni3S2@NiFe-120 electrocatalyst consists of Co9S8 substrates as the core and NiFe-LDHs as the shell, and exhibits excellent overall water splitting electrocatalytic activity with a low overpotential of 229 mV for the oxygen evolution reaction (OER), and 151 mV for the hydrogen evolution reaction (HER) and a full cell voltage of 1.62 V at 10 mA cm−2 current density. The core–shell heterostructure constructed by electrodeposition endows the catalyst with outstanding stability and low degradation in long-term catalytic processes as shown by continuous chronopotentiometry tests at current densities of 50, 100 and 200 mA cm−2 for 72 h. The as-prepared core–shell hierarchically heterostructural Co9S8/Ni3S2@NiFe-120 with high-efficiency and good-durability is a promising bifunctional electrocatalyst towards practical applications in overall water splitting.
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JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 35
·16625-16640
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IF 3.553
Zhang Zewu,Zhou Jiamin,Wei Hanlin,Dai Yifan,Li Shijia,Shi Haojun,Xu Gang
Abstract Efficient design and preparation of cost-effective and binder-free bifunctional electrocatalysts to accelerate the hydrogen and oxygen evolution reaction (HER and OER) are critical for overall water splitting. In this work, 3D hierarchical NiFe-LDH/FeCoS 2 /CFC electrodes were synthesized for the first time. The carboxyl groups derived from acid treating promote the homogeneously coated FeCoS 2 on CFC, giving rise to the strongly coupled FeCoS 2 /CFC hybrid. The NiFe-LDH exhibited the vertical growth feature on the FeCoS 2 /CFC composite, which can efficiently expose the active edges sites. Due to unique structure and synergistic effect between the components, the NiFe-LDH/FeCoS 2 /CFC exhibits significant electrocatalytic activity and stability under alkaline environments, with overpotentials of 190 and 308 mV to achieve 10 mA cm −2 for OER and HER, respectively, providing it as a promising electrocatalyst for water splitting reaction. In addition, we deeply studied the synergistic catalytic mechanism of NiFe-LDH/FeCoS 2 /CFC, explaining the reasons leading to the improved catalytic performance of HER and OER. Graphic abstract
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Small
·
2023
·
IF 13.3
Hualin Jiang,Yunjie Yu,Xueqing Duan,Pinghua Chen,Shuai Wang,Xianhua Qiu,Long Ye,Xinman Tu
The rational design of inexpensive metal electrocatalysts with exciting catalytic activity for overall water splitting (OWS) remains a significant challenge. Heterostructures of NiFe layered double hydroxides (NiFe-LDHs) with abundant oxygen defects and tunable electronic properties have garnered considerable attention. Here, a self-supporting heterostructured catalyst (named MoO 3 /NiFe-NF) is synthesized via a hydrothermal method to grow NiFe-LDH with oxygen vacancies (O V ) in situ on inexpensive nickel foam (NF). Subsequently, MoO 3 is anchored and grown on the surface of NiFe-LDH by electrodeposition. The obtained catalysts achieved outstanding oxygen/hydrogen evolution reaction (OER/HER, 212 mV/85 mV@10 mA cm −2 ) performance in 1 m KOH. Additionally, when MoO 3 /NiFe-NF is utilized as the cathode and anode in OWS, a current density of 10 mA cm −2 can be obtained as an ultralow battery voltage of 1.43 V, a significantly lower value compared to the commercial electrolyzer incorporating Pt/C and IrO 2 electrode materials. Finally, density functional theory (DFT) calculations and advanced spectroscopy technology are conducted to reveal the effects of heterojunctions and O V on the internal electronic structure of the electrical catalysts. Mainly, the present study provides a novel tactic for the rational design of remarkable, low-cost NiFe-LDH electrocatalysts with heterostructures for OWS.
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PubMed
高影响因子
Nanoscale
·
2024
·
IF 5.8
Yufeng Wu,Zhiyan Hou,Changlong Wang
Renewable electricity-powered electrooxidation of 5-hydroxymethylfurfural (HMFOR) to FDCA offers a green and sustainable approach to producing an essential monomer for bio-polymers, provided that a highly efficient electrocatalyst is present. Herein, we show that the doping of scandium (Sc) into an NiFe-LDH electrocatalyst (Sc-NiFe-LDH) considerably promotes HMFOR by enhancing the formation of high-valence NiIII–O active sites, facilitating electron transport and HMF adsorption and suppressing the oxygen evolution reaction. In the presence of the Sc-NiFe-LDH electrocatalyst, an FDCA faradaic efficiency and selectivity of 96.5% and 99.5%, respectively, were achieved at a current density of >600 mA cm−2. The high performance of the Sc-NiFe-LDH electrocatalyst is the best among those of other reported electrocatalysts for this reaction, showing great promise in upgrading biomass to valuable chemicals. This work would inspire further studies on the rational design of novel and efficient electrocatalysts for green and sustainable energy transformations.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Gaimei Gao,Mingyu Dou,Xiaojie Liu,Erkang Liu,Zixian Wang,Guang Yang,Hua Yang,Wenning Yang,Dacheng Li,Jianmin Dou
The development of photocatalysts with non-noble metals and the effective separation of photoexcited carriers is a significant strategy for accelerating surface reaction kinetics and promoting water splitting to produce H 2 . Herein, an exquisite core-shell NiFe-LDH@ZnIn 2 S 4 heterojunction photocatalyst was constructed by in situ decoration of ultrathin ZnIn 2 S 4 nanosheets on the surface of the flower-like NiFe-LDH microsphere . The synthesized 3D hierarchical NiFe@ZIS-25 composite exhibits enhanced photocatalytic H 2 evolution activity, reaching 9.12 mmol·h -1 ·g -1 , which is 2.52-fold higher than pure ZnIn 2 S 4 . The significant improvement in H 2 evolution performance could be attributed to the hierarchical core-shell structure of the NiFe@ZIS-25 photocatalyst, which enhanced the light capture ability. In addition, the interfacial coupling effect of ZnIn 2 S 4 and NiFe-LDH is beneficial to the migration of carriers. More importantly, the construction of Z-scheme heterojunction efficiently promotes the fast translation of photogenerated carriers while preserving a stronger reduction potential to achieve H 2 evolution. This work elucidates a rational strategy to develop efficient photocatalysts with hierarchical core-shell structures for water splitting.
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Small
·
2025
·
IF 12.1
Yongping Qu,Huajun Zhou,Yuzhen Zhang,Peihua Zhao,Kai Yuan,Rui Zhou,Hui Gao,Yanzhong Wang
Seawater electrolysis is a promising route for hydrogen production. However, the elevated concentration of Cl − in seawater can cause the serious corrosion of electrode materials, which limits the large-scale application of seawater splitting for the generation of green hydrogen. Herein, nickel iron layered double hydroxide@Ag/iron foam (NiFe-LDH@Ag/IF) composites are synthesized using a two-step method at room temperature. The introduction of Ag not only induces the electron density redistribution of NiFe-LDH to promote the formation of NiFeOOH as the catalytically active sites, but also impress the corrosion of chloride ions during the seawater oxidation. The as-prepared NiFe-LDH@Ag/IF only requires a low overpotential of 255 mV at a current density of 500 mA cm −2 in alkaline solution, and it can stably operate for 1000 h without degradation. Importantly, the formed AgCl nanoparticles loaded on the surface of NiFe-LDH nanosheets can effectively prevent the corrosive effect of Cl − during the seawater oxidation process. Thus, NiFe-LDH@Ag/IF can maintain high catalytic activity and work stably for 1000 h at high current density of 500 mA cm −2 for seawater oxidation. This study presents a simple method for preparing self-supported electrocatalysts with excellent corrosion resistance and high catalytic activity in alkaline seawater oxidation.
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Advanced Healthcare Materials
·
2025
·
IF 9.6
Hongwei Xu,Shuairu Zhu,Walaa Al-Mathagi,Mei Yang,Wanding Cui,Xiaohua Yuan,Xuping Sun,Yonggang Wei,Binwu Ying
Primary liver cancer remains a significant global health challenge, with the majority of patients diagnosed at an unresectable stage, further complicated by liver dysfunction due to cirrhosis. To address these clinical hurdles, nanozyme-based catalytic therapy has emerged as a promising strategy. However, its therapeutic efficacy is often limited by self-protective mechanisms associated with the tumor microenvironment (TME), particularly the overexpression of glutathione (GSH) and hypoxia-induced metabolic adaptation. In this study, a quaternary medium-entropy layered double hydroxide (LDH) nanozyme, denoted as NiFeMnCu-LDH is developed. This nanozyme exhibits peroxidase-like, catalase (CAT)-like, and oxidase-like activities, facilitating the cascade generation of reactive oxygen species (ROS). Simultaneously, the oxygen produced by CAT mitigates hypoxia, while the glutathione peroxidase-like activity drives the depletion of tumor antioxidants, effectively reprogramming the TME. Further in vitro experiments demonstrated that efficient production of ROS and scavenging of GSH induced substantial apoptosis in liver cancer cells. Additionally, mouse liver tumor models showed robust inhibition of tumor growth without systemic toxicity. This findings provide a framework for the precise engineering of nanozymes in advanced liver cancer treatment, addressing critical barriers within the TME and offering valuable insights into a mimetic multi-enzyme synergy for translational applications.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xiangxiang Chen,Guoxin Ding,Yan Liu,Yunwang Xing,Weipeng Qi,Guojun Cheng
In answer to the need for materials that absorb electromagnetic waves with great efficiency, this study reports the design and synthesis of a core–shell structured GM@NiFe-LDH@PANI composite. The material exhibits outstanding electromagnetic wave (EMW) absorption performance through multi-component synergy and multi-mechanism coupling. XRD and XPS analyses confirmed the material’s crystalline structure and chemical composition, while SEM images revealed the core–shell morphology, showing NiFe-LDH nanosheets uniformly anchored on glass microspheres (GM) surfaces, forming a hydrangea-like structure. Subsequent incorporation of polyaniline (PANI) further increased the heterojunction interface. Electromagnetic property measurements demonstrated that GNP-2 achieved optimal impedance matching at a thickness of 1.71 mm, resulting in a strong reflection loss of −52.86 dB and an effective absorption bandwidth of 4.72 GHz. The hydrangea-like NiFe-LDH structure enhances magnetic loss and promotes scattering and reflection through its porous framework, intensifying interfacial polarization effects. The conductive PANI shell, with its exposed active sites, facilitates EMW absorption through dipole polarization and conductive loss mechanisms. This core–shell porous design synergistically optimizes dielectric and magnetic losses. This composite material demonstrates considerable potential for electromagnetic compatibility applications in radar stealth, modern communication systems, and renewable energy devices.
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ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Yan Zhou,Desheng Sui,Qi Yin,Hui Zhang,Jiabing Luo,Guizheng Qi,Wenhui Zhang,Hailin Ma,Jun Zhang
Ammonia has recently been recognized as a promising energy carrier for long-term and large-scale energy storage. Direct ammonia fuel cells (DAFCs) stand out among ammonia utilization technologies due to their high theoretical energy conversion efficiency and environmental compatibility. Although Pt has been widely regarded as the most effective electrocatalyst for ammonia oxidation in alkaline media compared to other noble metals, designing composite structures of Pt to improve the AOR performance of Pt-based catalysts through carrier modulation is still the best solution for designing fuel cell anode materials at present. This work presents an electrochemical synthesis strategy for in situ reduction of [PtCl 6 ] 2− precursors into Pt nanoparticles anchored on NiFe-layered double hydroxide/nickel foam substrates. The unique structure supplies sufficient OH ad for the gradual dehydrogenation of Pt, the two-dimensional layered structure provides a vast loading space for Pt, and more importantly, the bimetallic nature of LDH modulated the electronic state of Pt and thus further regulated the adsorption state of Pt with N 2 H 4 and was verified by in situ IR spectroscopy, which facilitated the reaction towards the G-M mechanism, reduced the toxicity of the *N atoms, and improved the CV cycling stability of the catalyst. The study of the composite structure of Pt and LDH provided a new approach for the exploration of Pt composite catalysts used in the anode catalysts of DAFC.
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