ANALYTICA CHIMICA ACTA
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2025
·
IF 6
Jinhua Xu,Jinyu Zhang,Wenmin Zhang,Shiye Xie,Lan Zhang
Background Chiral pollutants present significant environmental and health concerns, with neurotoxic amino acid analogs like β-N-methylamino-L-alanine (BMAA) demonstrating enantiomer-specific bioaccumulation in aquatic ecosystems. Current analytical approaches for chiral environmental contaminants rely predominantly on chromatographic techniques that require extensive sample preparation (typically 24 h), limiting field deployment and high-throughput screening capabilities. Detection thresholds for these compounds (0.1–10 μg/L) necessitate sensitive methodologies that maintain stereochemical integrity. This study addresses these analytical challenges through the rational design of chiral cobalt hydroxide (CF–Co(OH) 2 ) nanomaterials engineered for dual-mode detection and separation functionality. Results A hierarchical porous α-Co(OH) 2 with tunable chirality (R/S/RS configurations) and morphologies (square, rough surface, snowflake, flower-like) via micelle-templated growth strategies. The materials demonstrated dual functionality: (1) Rapid colorimetric amino acid discrimination within 5 min with precision (RSD = 4.9 %, n = 6), validated through urinary l -tryptophan quantification (17.1 ± 0.4 μg/mL); (2) Ultrasensitive BMAA separation via SPE-HPLC-MS/MS with significantly improved detection limits (LOD = 0.02 μg/kg) and processing speed (144 × faster than conventional methods). The colorimetric detection mechanism exploits BMAA's ability to form cobalt-amine complexes that produce concentration-dependent yellow coloration, enabling visual detection at 50 μg/kg in freshwater samples. Field testing successfully detected BMAA in crucian carp (0.39 ± 0.03 μg/kg), confirming food-chain biomagnification with excellent recovery (90.1–102.7 %) across diverse matrices. The system's chiral specificity exhibited distinct affinity patterns (BMAA: R–Co(OH) 2 ; DAB: S–Co(OH) 2 ) with 91.4 % enantiomeric excess in just 10 min through configuration-specific “three-point binding” mechanisms (intramolecular binding energy: 18.7 kcal/mol). Significance This research establishes morphology-programmable chiral materials as a versatile analytical platform for rapid on-site environmental monitoring and high-throughput toxin analysis. The developed methodology directly addresses World Health Organization guidelines for algal toxin detection in drinking water while providing a generalizable approach for chiral pollutant discrimination in complex environmental and biological samples.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Zhuoran Hou,Jie Yu,Xinsheng Zhou,Zhibin Chen,Jiawei Xu,Boyu Zhao,Wenbao Gen,Huayu Zhang
A self-supporting composite electrode material with a unique three-dimensional structure was synthesized by in-situ growth of nanoscale NiMnLDH-Co(OH) 2 on a nickel foam substrate via hydrothermal electrodeposition. The 3D layer of NiMnLDH-Co(OH) 2 provided abundant reactive sites for electrochemical reactions, ensuring a solid and conductive skeleton for charge transfer and resulting in significant enhancement of electrochemical performance. The composite material showed a strong synergistic effect between the small nano-sheet Co(OH) 2 and NiMnLDH, which promoted reaction kinetics, while the nickel foam substrate acted as a structural conductivity agent, stabilizer, and good conductive medium. The composite electrode showed impressive electrochemical performance, achieving a specific capacitance of 1870F g −1 at 1 A g −1 and retaining 87% capacitance after 3000 charge–discharge cycles, even at a high current density of 10 A g −1 . Moreover, the resulting NiMnLDH-Co(OH) 2 //AC asymmetric supercapacitor (ASC) demonstrated remarkable specific energy of 58.2 Wh kg −1 at a specific power of 1200 W kg −1 , along with outstanding cycle stability (89% capacitance retention after 5000 cycles at 10 A g −1 ). More importantly, DFT calculations reveal that NiMnLDH-Co(OH) 2 facilitates charge transfer, accelerating surface redox reactions and increasing specific capacitance. This study presents a promising approach towards designing and developing advanced electrode materials for high-performance supercapacitors.
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CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Mei Yang,Jingtian Yang,Ruobing Pi,Yunlong Zhou,Meng Sun,Jiang Liu
In the context of the “dual carbon” goals, the development of sustainable photocatalytic systems for carbon dioxide (CO 2 ) reduction is critical for alleviating energy scarcity while mitigating carbon emissions. Utilizing agricultural waste biomass in photocatalytic systems supports the recycling of biomass resources and mitigates the environmental issues caused by stalk burning. In this study, carbon quantum dots (CQDs) with nitrogen and phosphorus doping (NP-CQDs) were prepared by a hydrothermal approach using corn stalks as the carbon source. The NP-CQDs were then incorporated into a composite with graphitic carbon nitride (g-C 3 N 4 ) and nickel hydroxide (Ni(OH) 2 ), successfully obtaining the ternary catalyst of CN/Ni/NP-CQDs. The optimal ratio composite material of CN/Ni/NP-CQDs-4 demonstrates excellent CO 2 reduction performance, exhibiting the CO and CH 4 production rates of 14.24 and 0.73 μmol g −1 h −1 , which are 10.02 and 2.28 times that of pure g-C 3 N 4 . The CN/Ni/NP-CQDs-4 has a relatively large specific surface area, which can provide more active sites and improve the CO 2 reduction efficiency. EPR results show that the Z-scheme heterojunction formed by g-C 3 N 4 and Ni(OH) 2 can effectively suppress the recombination of photogenerated carriers. NP-CQDs serve as an electron mediator, thereby enhancing photogenerated charge transfer capability. This study successfully combines biomass corn stalk derivatives with traditional photocatalytic materials, thereby addressing the challenge of utilizing agricultural waste valorization while reducing the cost of the photocatalytic system. This study provides new insights for constructing a green and sustainable CO 2 reduction photocatalytic system.
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Catalysts
·
2025
·Vol. 15
·期 8
·725
·
IF 4
Bingxian Zhu,Yachao Liu,Yue Yan,Hui Wang,Yu Zhang,Ying Xin,Weijuan Xu,Qingshan Zhao
Hydrogen energy is a pivotal carrier for achieving carbon neutrality, requiring green and efficient production via water electrolysis. However, the anodic oxygen evolution reaction (OER) involves a sluggish four-electron transfer process, resulting in high overpotentials, while the prohibitive cost and complex preparation of precious metal catalysts impede large-scale commercialization. In this study, we develop a FeCo-based bimetallic deep eutectic solvent (FeCo-DES) as a multifunctional reaction medium for engineering a three-dimensional (3D) coral-like FeOOH-Co2(OH)3Cl/NF composite via a mild one-step impregnation approach (70 °C, ambient pressure). The FeCo-DES simultaneously serves as the solvent, metal source, and redox agent, driving the controlled in situ assembly of FeOOH-Co2(OH)3Cl hybrids on Ni(OH)2/NiOOH-coated nickel foam (NF). This hierarchical architecture induces synergistic enhancement through geometric structural effects combined with multi-component electronic interactions. Consequently, the FeOOH-Co2(OH)3Cl/NF catalyst achieves a remarkably low overpotential of 197 mV at 100 mA cm−2and a Tafel slope of 65.9 mV dec−1, along with 98% current retention over 24 h chronopotentiometry. This study pioneers a DES-mediated strategy for designing robust composite catalysts, establishing a scalable blueprint for high-performance and low-cost OER systems.
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RSC Advances
·
2018
·Vol. 8
·期 7
·3611-3618
·
IF 2.936
Chenyang Zhang,Zhen Du,Ruyi Zhou,Peng Xu,Xinghua Dong,Yanyan Fu,Qing Wang,Chunjian Su,Liang Yan,Zhanjun Gu
Sparked by the growing environmental crises, photocatalytic degradation of chlorophenols with inexhaustible solar energy is expected to be converted into actual applications. Here, we report the preparation of the nanocomposite of Cu2(OH)PO4 and reduced graphene oxide (Cu2(OH)PO4/rGO) through a one-step hydrothermal method and examined its infrared-light photocatalytic activity in the degradation of 2,4-dichlorophenol (2,4-DCP). As evidenced by the absorption spectra and the degradation of 2,4-DCP, Cu2(OH)PO4/rGO exhibited enhanced infrared light-driven photocatalytic activity compared to pure Cu2(OH)PO4 and was very stable even after repeated cycling. More importantly, the introduction of hydrogen peroxide (H2O2) could combine the photocatalytic and photo-Fenton effects into one reaction system and maximize the infrared light photocatalytic efficiency. Typically, the rate constant of Cu2(OH)PO4/rGO and H2O2 was more than 6.25 times higher than that of only Cu2(OH)PO4/rGO, and almost 10 times greater than the value for pure Cu2(OH)PO4. Further, a plausible mechanism for the enhanced photocatalytic properties of Cu2(OH)PO4/rGO has been discussed. These findings may help the development of novel hybrid photocatalysts with enhanced infrared light photocatalytic activity for applications in the treatment of chlorophenol-contaminated wastewater.
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DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 15
·5801-5809
·
IF 4.569
Yuan Yuan,Yuangang Xu,Qiang Xie,Dongxue Li,Qiuhan Lin,Pengcheng Wang,Ming Lu
A series of cyclo-N5−-based lead-containing energetic coordination polymers [Pb(OH)]4(N5)4 (1), [Pb3(N5)3(H2O)9(NO3)]4(N5)8(H2O)5 (2), [Pb(OH)]4(N5)3(NO3)(H2O)3 (3), and [Pb(OH)]4(N5)3(ClO4)(H2O) (4) were synthesized by self-assembly and characterized by single-crystal X-ray diffraction, powder X-ray diffraction, infrared and Raman spectroscopy, high resolution mass spectrometry, elemental analysis, scanning electron microscopy, and differential scanning calorimetry. In addition, their thermal decomposition kinetics have been studied theoretically and experimentally. The results revealed that the synthesized CPs possess regular structures, very high densities (2.852–4.537 g cm−3), good oxygen balances (CO2) (−2.72–+2.61%), good thermal stabilities (80–110 °C), and acceptable sensitivities (9.5–20 J; 120–240 N). This work will provide new inspiration for the development of cyclo-N5−-based coordination polymers and energetic materials.
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CATALYSIS COMMUNICATIONS
·
2020
·
IF 3.612
Yaru Li,Xiaochao Zhang,Jianxin Liu,Yawen Wang,Yunfang Wang,Rui Li,Caimei Fan
A fish bone-like BiVO 4 film was successfully prepared in-situ on metal Bi substrate via a facile one-step hydrothermal method. The obtained BiVO 4 film exhibits excellent tetracycline photodegradation efficiency, reaching 89.7% in 240 min under visible light irradiation. Its quantum yield (6.3 × 10 −5 molecules photon −1 ) and kinetic reaction rate (7.80 μmol g −1 h −1 ) are better than most reported immobilized Bi-based systems. Finally, the formation mechanism was investigated, which suggests that OH − plays a vital role in forming BiVO 4 film by affecting the release of VO 3 − . The results of this study provide available means in the in-situ preparation of Bi-based photocatalyst film.
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JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 10
·106518
·
IF 4.386
Qingxiao Zhang,Pei Han,Hui Zhang,Jixin Yao,Xinyu Wang,Dongmeng Chen,Xueqin Zuo,Qun Yang,Shaowei Jin,Guang Li
The oxygen evolution reaction (OER) is a critical process in the operation of electrochemical water splitting. Metal-organic frameworks (MOFs) are applied in the field of OER electrocatalysis because of their unique structure, but the high impedance and unstable framework during pyrolysis remain unresolved. Here, MIL-88A (iron-based MOF) was modified by hydrolysis and loading Co(OH)2 to improve the catalytic activity. The electrochemical results showed that the Co(OH)2/MIL-88A achieved the optimized performance with the current density of 10 mA cm−2 at 278 mV (vs RHE). Density functional calculations (DFT) combined with characterization tests suggest that electrons transfer from Co(OH)2 to MIL-88A at the interface of the heterostructure, leading to a larger hole electron pair density. D-band theory calculations demonstrated that the synergistic effect of MIL-88A and Co(OH)2 in heterostructure strengthens the adsorption between active sites and adsorbate. The above proofs are the source of the excellent OER performance of the Co(OH)2/MIL-88A. The finding has certain reference significance for the heterogeneous treatment of iron-based MOF catalysts.
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NEW JOURNAL OF CHEMISTRY
·
2024
·
IF 2.7
Fang Wu,Yuhong Jiao,Jinlong Ge,Yujun Zhu,chao feng,Zhong Wu,Chang-Peng Lv
Exploring highly active, low-cost electrocatalysts for oxygen evolution reaction (OER) is of great significance but still a major challenge. Here, we synthesized Ni(OH)2@Ni(Fe)OOH with a sea urchin structure on nickel foam via a simple hydrothermal and subsequent soaking process. Experimental results indicate that incorporation of Fe into Ni(OH)2 is favorable for modulate the electronic structure, faster electron transfer and improved intrinsic activity, thereby leading to excellent OER activity. The optimized Ni(OH)2@Ni(Fe)OOH exhibits superior OER activity with overpotentials of 245 and 310 mV at 10 and 100 mA cm-2, respectively, and a small Tafel slope of 40.7 mV dec-1, and along with high stability over 100 h, which is more active than benchmark RuO2 and sever control samples without introduction of Fe. More importantly, the overall water splitting system by using Ni(OH)2@Ni(Fe)OOH-100 as anode and Pt/C as the cathode only requires a cell voltage of 1.54 V to afford 10 mA cm-2. This work not only demonstrate the key factor of Fe doping, but also offers a new path for the development of NiFe-based OER catalysts.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Xinyu Guo,Jiaxin Li,Fanze Meng,Dongdong Qin,Xueyan Wu,Yan Lv,Jixi Guo
Properly design and manufacture of bifunctional electrocatalysts with superb performance and endurance are crucial for overall water splitting. The interfacial engineering strategy is acknowledged as a promising approach to enhance catalytic performance of overall water splitting catalysts. Herein, the Ru nanoparticles modified Ni 3 Se 4 /Ni(OH) 2 heterostructured nanosheets catalyst was constructed using a simple two-step hydrothermal process. The experimental results demonstrate that the abundant heterointerfaces between Ru and Ni 3 Se 4 /Ni(OH) 2 can increase the number of active sites and effectively regulate the electronic structure, greatly accelerating the kinetics of the hydrogen evolution reaction (HER)/oxygen evolution reaction (OER). As a result, the Ru/Ni 3 Se 4 /Ni(OH) 2 /NF catalyst exhibits the low overpotential of 102.8 mV and 334.5 mV at 100 mA cm −2 for HER and OER in alkaline medium, respectively. Furthermore, a two-electrode system composed of the Ru/Ni 3 Se 4 /Ni(OH) 2 /NF requires a battery voltage of just 1.51 V at 10 mA cm −2 and remains stable for 200 h at 500 mA cm −2 . This work provides an effective strategy for constructing Ru-based heterostructured catalysts with excellent catalytic activity.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Wenlin Zhang,Di Jiao,Lu-Hua Zhang,Fengshou Yu
Iron phthalocyanine (FePc) is a promising non-noble metal catalyst for oxygen reduction reaction (ORR). While, with the plane-symmetric FeN 4 site, the ORR activity of FePc is generally low due to its low ability to adsorb and activate O 2 . Herein, we anchor FePc on Mg(OH) 2 / N -doped carbon nanosheets building the ternary plate-like catalyst FePc/Mg(OH) 2 /NC. Theoretical and experimental results show that due to the formation of FePc/Mg(OH) 2 heterojunction, the electron spin state of the monodisperse iron active site ranges from medium spin (MS, t 2g 5 e g 1 ) to low spin (LS, t 2g 6 e g 0 ), enhancing the adsorption with oxygen-containing intermediates, thereby improving the dynamics of the oxygen reduction reaction. As a result, FePc/Mg(OH) 2 /NC catalyst exhibits an outstanding performance (E 0 = 1.02 V, E 1/2 = 0.91 V) for ORR, superior to the commercial Pt/C electrode (E 0 = 1.01 V, E 1/2 = 0.85 V) and FePc/NC (E 0 = 0.97 V, E 1/2 = 0.87 V) under the alkaline conditions. This work offers a new way for the rational design of effective Fe N C catalysts with the support of metal oxides/hydroxides.
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THERMOCHIMICA ACTA
·
2024
·
IF 3.1
Guangyan Chen,Zai-Yin Hu,Zhijun Guo,Yi Xie
Transition metal nanomaterials are widely applied as flame retardants in materials. Herein, an oxidation-mediated strategy was developed for temporally controlling the in situ growth of Fe(OH) 3 nanoparticles on wool/nylon (W/N) fabrics. The formed particles exhibit homogeneous dispersion on the surface of W/N fabrics, with an average particle diameter of about 60 nm. These Fe(OH) 3 nanoparticles can simultaneously enhance both the flame retardancy (the limiting oxygen index increased by 18.8 % and passed the UL-94 burning test of V-0 rating) and mechanical performance (the tensile strength increased by 9.13 %) of the W/N fabrics. Meanwhile, the obtained W/N fabrics exhibit remarkable smoke-suppressant properties, demonstrating a reduction of 76.4 % and 65.5 % in smoke production rate and total smoke production, respectively, compared to the pure W/N fabrics. Furthermore, the prepared W/N fabrics exhibit good durability. This innovative strategy may be also extended for synthesizing other nanomaterials and pave a new path to develop high-performance flame-retardant materials.
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