Molecular Catalysis
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2026
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IF 4.3
Wangchuang Zhu,Ke Liu,Xinghua Zhang,Qi Zhang,Xiuzheng Zhuang,Longlong Ma
To achieve efficient overall water splitting, balanced reaction kinetics between electrodes is essential. Current research, however, predominantly focuses on single-electrode performance, overlooking inter-electrode synergy. This study develops a nanostructured bifunctional catalyst where NiFe alloy serves as the key synergistic active site. Through mechanism-guided modification, the catalyst achieves significantly improved HER/OER performance, with overpotentials decreasing from 304.8/310.2 mV to 146/298 mV at 10 mA/cm 2 . Systematic characterization (TEM/XRD/XPS) reveals the rate-determining steps and reaction pathway. The assembled electrolyzer requires only 1.58 V to reach 10 mA/cm 2 and demonstrates excellent stability over 11 h. This work provides new insights into the rational design and mechanistic analysis of bifunctional catalysts.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Dandan Zhang,Yuqiang Ma,Meng Li,Xin Tang,Cihang Wang,Zihang Zhao,Xiaogang Mu,Xuanjun Wang,Jiachen Li,Haixia Ma,Jieshan Qiu
Integrating thermodynamically-favorable small molecules oxidation with water electrolysis offers an effective way to realize energy-efficient H 2 production and obtain value-added chemicals as well. In this study, we report an energy-saving H 2 production system utilizing thermodynamically favorable 3,5-diamino-1 H -1,2,4-triazole (DAT) electrooxidation reaction (DATOR) as an oxygen evolution reaction-alternative process of low-energy-consumption for H 2 production. At the anode, value-added 3,3′-diamino-5,5′-azo-1,2,4-triazole (DAAT) energetic chemical and H 2 are obtained. The carbon cloth-loaded NiS 2 (CC@NiS 2 ) substrate and doped with Ru nanoparticles (NPs) cathode could modulate the electronic structure, resulting in a hydrogen evolution reaction (HER) overpotential as low as 34.4 mV at a current density of 10 mA cm −2 . Density Functional Theory calculations show that the synergistic effect of the Ru NPs and NiS 2 significantly enhanced the alkaline HER kinetics. Benefitting from the DATOR and high hydrogen atom economy to convert H of DAT substrate to H 2 via Tafel pathway, the assembled CC@NiS 2 /Ru NPs||CF@CuO NWs (CF: copper foam) two-electrode coupling system only requires 1.04 V to drive a current density of 10 mA cm −2 , and greatly reduces the energy consumption by 36.6% for H 2 production compared with conventional water electrolysis, avoiding the traditional hazardous synthesis condition of DAAT. Furthermore, anion-exchange membrane electrolyzer tests show superior long-term stability of 250 h at a high current density of 0.5 A cm −2 . This study not only provides a new idea for the sustainable electrosynthesis of energy-containing materials, but also demonstrates the broad application prospects of electrocatalytic coupling systems in the co-production of clean energy and high-value chemicals.
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Analytical Methods
·
2026
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IF 3
Xixuan Chen,Lei Zheng,Rongzhen Ma,Phong H. N. Vo,Jiaxin Ni,Songjun Guo
This study presents an improved ethanol-mediated solvothermal method for synthesizing malic acid/urea-derived carbon dots (MUCDs) for the highly selective and sensitive detection of mercury ions (Hg2+). The detection limit was enhanced by over an order of magnitude compared to previous methods employing similar precursors, achieving a limit of detection of 88.46 nmol L−1, which meets the European Union standard for mercury discharge in industrial wastewater (250 nmol L−1). Pyrophosphate (P2O74−) has been used as a highly effective masking agent for Fe3+, substantially boosting the probe's performance in complex matrices. With practical application in mind, the environmental safety of these carbon dots was proactively evaluated using a zebrafish model. The assessment demonstrated no significant toxicity at concentrations up to 100 mg L−1, establishing a 10-fold safety margin relative to the operational dosage. Fluorescence imaging revealed accumulation specifically in the intestinal tract, with no distribution to vital organs, confirming their environmental safety. Under optimized conditions, the MUCDs achieved a quenching efficiency of 0.82 in the presence of 25 µmol per L Hg2+ at a concentration of 10 mg L−1, while also demonstrating thermal stability and pH tolerance. Spike-recovery tests in tap water, river water, and metallurgical wastewater samples yielded satisfactory recoveries ranging from 93.85% to 101.86%. Based on the characterization of MUCDs and the MUCDs–Hg2+ complex, the observed quenching mechanism was explained by chelation between Hg2+ and surface functional groups, leading to aggregation, static quenching, and enhanced Rayleigh scattering. This study highlights the critical importance of incorporating comprehensive environmental safety assessments into the development of functional nanomaterials.
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Journal of Cleaner Production
·
2026
·
IF 10.7
Hao Dong,Nan Zhao,Qianting Xu,Ye Xiao,Weihua Zhang,Rongliang Qiu
Carbazole (CBZ) is a ubiquitous and toxic N-heterocyclic contaminant in water and soil, posing substantial environmental risks. Current remediation strategies for CBZ struggle with low efficiency, high energy consumption, or strict operational conditions, making persulfate-based advanced oxidation a promising alternative. Herein, we synthesized a series of urea-tailored biochars (UBCs) via low-temperature co-pyrolysis. Among them, UBC5 featuring an extremely high N content (21.4%) showed optimal peroxydisulfate (PDS) activation for CBZ degradation. The UBC5/PDS system achieved ∼90% CBZ removal within 1 h across pH 3-9, and exhibited strong resistance to inorganic anions (Cl − , SO 4 2− , H 2 PO 4 − ) and humic acid. Furthermore, the system effectively degraded CBZ in soil (71-82% within 1 h), with residual concentrations falling below safety thresholds for industrial land after 12 h. Quenching experiments, electron paramagnetic resonance, and electrochemical analyses revealed a non-radical degradation pathway: UBC5-PDS∗ mediated electron transfer, with a minor contribution from 1 O 2 . Characterizations and density functional theory calculations elucidated a unique “in-plane to out-of-plane electron transfer” mechanism. The degradation intermediates exhibited reduced toxicity, with negligible adverse effects on soybean growth. Notably, UBC5 has lower production cost ($9.52 kg −1 ) and carbon emissions (18.38 kg CO 2 e kg −1 ) than typical activators. This study provides new insight for the design of carbon-based persulfate activators and an efficient, sustainable approach for the remediation of CBZ-contaminated water and soil.
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ANALYTICA CHIMICA ACTA
·
2026
·
IF 6.1
Junyuan Shi,Zihang Yin,Dejin Lin,Dingfeng Wang,Siting Peng,Wendi Xiao,Houwen Hu,Jiong Cheng,Da Chen
The pervasive issue of pharmaceutical overuse in agriculture and veterinary practice has led to the alarming accumulation of drug residues within the global food supply chain, posing a direct and escalating threat to consumer safety. Among these contaminants, compounds such as chlorogenic acid (CGA) and tinidazole (TNZ) are of particular concern due to their potential to provoke allergic responses and cause long-term adverse health effects. There is an urgent need for the development of rapid and reliable detection techniques capable of on-site monitoring to effectively mitigate these risks and ensure food safety. Herein, our work develops an innovative ratiometric sensing strategy that utilizes the dual-excitation properties of nitrogen-doped carbon dots (N-CDs) to simultaneously detect CGA and TNZ. Remarkably, as a fluorescent nanoprobe, N-CDs are capable of detecting CGA over a concentration range of 0.036-40 μM with a limit of detection (LOD) of 36 nM, which is attributed to static quenching (SQE) and the inner filter effect (IFE). Differently, the addition of TNZ results in fluorescence quenching of N-CDs via localization of inner filter effect (L-IFE), presenting the LOD of 68 nM within the 0.068-25 μM range. Furthermore, a portable smartphone-assisted platform which incorporates the N-CDs/PVA composite film successfully enables visual detection of CGA and TNZ with satisfactory recoveries in real samples. These results suggest that the developed portable smartphone-assisted fluorescence platform enables accurate dual-target detection of CGA and TNZ while offering outstanding stability and reproducibility suitable for on-site applications. Consequently, our methodology presents a versatile and practical strategy for real-time pharmaceutical residue screening, significantly advancing food safety monitoring capabilities.
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NEW JOURNAL OF CHEMISTRY
·
2026
·
IF 2.6
Shilong Zhou,Yuhang Ding,Dongbo Li,Guo Zhang,Chengqiang Ying,Kai Li,Yi Sun,Yan Hong,Yueming Li
Crafting cost-effective bifunctional electrocatalysts capable of handling both the oxygen evolution reaction and the hydrogen evolution reaction is critical for advancing water-splitting technologies. Constructing amorphous–crystalline heterostructures has emerged as a promising strategy. In this work, a Co–Er-based amorphous/crystalline heterostructure (CoEr@ErFeP@CoMo2S4) fabricated on nickel foam (NF) via hydrothermal synthesis and subsequent phosphidation exhibits outstanding bifunctional electrocatalytic performance for both the OER and the HER. The optimized CoEr@ErFeP@CoMo2S4/NF catalyst requires overpotentials of only 171 mV for the OER and 135 mV for the HER to achieve a current density of 10 mA cm−2. Furthermore, a complete water-splitting device employing CoEr@ErFeP@CoMo2S4/NF requires just 1.51 V to drive a current density of 10 mA cm−2 while demonstrating excellent stability. The amorphous–crystalline heterointerface packs a double punch, offering a diverse array of active hotspots for both the oxygen evolution and hydrogen evolution reactions while also creating superhighways for charge transfer across the boundary, all of which gives the electrocatalytic reaction kinetics a serious boost. This research presents a clear-cut approach to manufacture highly effective and durable electrocatalysts on a grand scale, paving the way for efficient overall water splitting in alkaline environments.
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CARBOHYDRATE POLYMERS
·
2026
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IF 13.2
Yong Zhu,Fengyan Chen,Bingmin Wu,Yishan Tong,Kunbo Ning,Zhiyuan Zhen,Jihang Chen
Polysaccharide-based supramolecular self-assembled hydrogels are promising biomaterials owing to their biocompatibility and dynamic controllability. This study was to explore the use of a polysaccharide (PSP) isolated from a well-known Chinese herb, Polygonatum sibiricum Red. (Huangjing) in the supramolecular self-assembled hydrogel. PSP was characterized as a neutral fructan with a backbone of →1)-β-D-Fru f -(2 → and →1,6)-β-D-Fru f -(2 → units bearing O-6–substituted branches. PSP/Chitosan (PSP/CS) hydrogels were prepared with different PSP concentrations (4, 6, 8, 10, 12 wt%), forming 3D network porous structure composed of nanofiber chains, with the pore size ranging from 0.67 to 13.67 μm. Increasing PSP content markedly enhanced gel strength and stability, as evidenced by higher storage modulus (G'), increased compressive modulus (0.03–0.75 kPa), and improved thermal stability (maximum degradation-rate temperature from 290 to 302 °C). In addition, PSP/CS hydrogels exhibited high swelling (2673 ± 65%) and water retention (78.26 ± 1.58%) properties. Hydrogen bonding was the predominant driving force for self-assembly. Furthermore, PSP/CS hydrogel preliminarily showed good cytocompatibility toward Caco-2 cells. In conclusion, these findings clarify the structure–assembly–property relationships of PSP/CS hydrogel and suggest a design strategy for exploiting fructan polysaccharides in advanced biomaterials.
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SENSORS AND ACTUATORS A-PHYSICAL
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2026
·
IF 5.1
Ruojin Zhang,Yuhang Du,Longyu Ren,Jiliang Yuan,Mengmeng Xie,Zhaohui Liu,Xiuze Li,Jieqiang Wang,Hongyan Xu
High-performance sensors for toxic gases have been the goal of research in the industry. In this study, In 2 O 3 nanorods were grown on ceramic tubes using a hydrothermal method, and a series of gradient annealing temperatures were set to obtain different samples through annealing in air atmosphere. Among them, In 2 O 3 annealed at 400 °C (In 2 O 3 -400) showed the highest oxygen vacancies and chemical adsorbed oxygen ratio. The gas sensing performance test demonstrated that In 2 O 3 -400 exhibited excellent sensitivity to NO 2 at room temperature, its response was 4.58 at 500 ppb and 146.58 at 50 ppm. Density functional theory (DFT) analysis was used to study the adsorption mechanism of nitrogen dioxide on pure In 2 O 3 and In 2 O 3 with V O materials, showing that the existence of oxygen vacancies enhanced the adsorption capacity of In 2 O 3 for NO 2 , and the DFT calculation results were in accordance with the experimental data. This study determined the optimal annealing process conditions, providing theoretical and experimental support for the development of high-performance room-temperature In 2 O 3 -based NO 2 gas sensing devices.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Kaichun Xu,Kaidi Wu,Zichen Zheng,Marie-Pierre Planche,Sihao Deng,Hanlin Liao,Chao Zhang
1-octen-3-ol is reported as a representative biomarker among volatile organic compounds (VOCs) associated with wheat mildew, and the corresponding chemiresistive sensors reported to date are still under development due to their limited sensitivity. To achieve excellent 1-octen-3-ol sensing performance, a two-/three-dimension (2D/3D) hierarchical core-shell structure NiO/NiFe 2 O 4 with abundant interior heterojunction interfaces was synthesized. This simple strategy achieves a triple effect: (i) the pre-concentration effect arising from the core-shell structure, (ii) charge transfer and interfacial modulation between the core and shell, and (iii) the interfacial interaction of the NiO/NiFe 2 O 4 heterojunction formed within the 2D nanosheets of the shell. The optimal NiO/NiFe 2 O 4 sensor demonstrated superior overall performance at 275 °C, whose response value to 100 ppm 1-octen-3-ol reached 1109 ± 79, with excellent selectivity (S 1-octen-3-ol /the max of S other VOCs = 4.0), significantly outperforming previously reported sensors. A significant enhancement in response to complex VOCs generated during wheat storage was achieved, demonstrating the practical feasibility of NiO/NiFe 2 O 4 . This work may serve as a guideline for developing high-performance hierarchical core-shell gas sensing materials.
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ADVANCED MATERIALS
·
2026
·
IF 29.1
Chongyang Hao,Wei Guo,Guoqiang Zhao,Xiaomin Zhang,Yuan Wang,Jiabing Liu,Xin Zhang,Xiaoyu Zhang,Mingxia Gao,Hongge Pan,Wenping Sun
The commercialization of lithium metal batteries (LMBs) is fundamentally challenged by Li dendrite growth, which originates from an unstable solid electrolyte interphase (SEI). Engineering a Li 3 N-enriched SEI is highly desirable for achieving high conductivity and mechanical strength, but the kinetic barrier of the LiNO 3 -to-Li 3 N conversion remains a major obstacle. Here, we report a catalytic approach to engineer Li 3 N-enriched SEI layers by accelerating LiNO 3 reduction using transition metal single-atom catalysts supported on nitrogen-doped carbon (M/NC, M = Cr, Mn, Fe, Co, Ni, Zn). Among them, Co/NC exhibits the highest catalytic activity, leading to an SEI with significantly enhanced mechanical robustness and ionic transport. Theoretical calculations reveal that the superior performance of Co/NC stems from the minimal energy difference between its frontier molecular orbitals and those of the key LiNO intermediate, facilitating the electron transfer process. Consequently, the symmetric battery using Co/NC catalyst achieves exceptional cyclability for over 2500 h (1 mA cm −2 , 1 mAh cm −2 ). When applied in full cells, the Co/NC-modified current collector also yields a dramatically prolonged cycle life. This work underscores the profound role of interfacial catalysis in designing high-performance SEI for practical LMBs.
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ChemNanoMat
·
2026
·Vol. 12
·期 2
·e70200
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IF 2.6
Zirui Huang,Chifei He,Yuekuan Sun,Wenjuan Liu
Micro/nanomotors (MNMs) hold significant promise for environmental remediation, yet their practical deployment remains constrained by limited propulsion efficiency, high fabrication costs, and complex manufacturing processes. Herein, we report a facile redox reaction coupled with an in situ deposition strategy for the scalable fabrication of three-dimensional flower-like MnO 2 /NiM layered double hydroxide (LDH) micromotors (M = Al, Fe, or Co) for efficient tetracycline removal. Powered by hydrogen peroxide, MnO 2 catalytically decomposes H 2 O 2 to generate oxygen bubbles, which serve as the driving force for autonomous motion. Under the conditions of 3% H 2 O 2 and 0.5% SDS, the MnO 2 /NiM-LDH micromotors exhibit good propulsion performance, achieving maximum speeds of 349.9, 244.2, and 27.3 μm/s for M = Al, Fe, and Co, respectively. During the catalytic process, reactive free radicals are generated, enabling effective tetracycline degradation. Notably, the addition of surfactants induces the accumulation of oxygen bubbles on the solution surface. This phenomenon promotes the contact between micromotors and tetracycline, thereby facilitating degradation and separation. In the test system, the MnO 2 /NiCo-LDH micromotors exhibit outstanding performance, with up to 93.3% removal of tetracycline (100 mg/L) in neutral water. This work highlights their significant potential in the environmental remediation of organic pollutants.
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Environmental Technology & Innovation
·
2026
·
IF 7.3
Minghua Nie,Meiqi Su,Yue Zhang,Yuyan Liu,Caixia Yan
The efficient utilization of urine and reducing environmental pollution require the selective removal of pharmaceuticals from fresh urine (FU). Though advanced oxidation processes show promise, they often fail in FU due to its complex matrix. This study introduces a novel approach using periodate (PI) without externally added activators for the targeted degradation of acetaminophen (ACE) in FU. The results reveal that PI addition significantly enhances ACE removal. The degradation rate of ACE positively correlates with increased PI concentration within the range of 0.5–4 mmol·L⁻¹ . Optimal degradation conditions are observed under weakly acidic to neutral pH levels. The process demonstrates robust performance across a broad concentration range of ACE (3–9 μmol·L⁻¹), with ACE removal efficacy remaining stable under batch PI addition ( n = 1–4). The phosphate in FU promotes the activation of PI, while other coexisting urinary constituents such as such as urea, citrate, Ca²⁺, Mg²⁺, and SO₄²⁻ does not adversely affect ACE elimination, indicating good anti-interference properties. Interestingly, elevated Cl⁻ levels marginally enhance ACE removal. Singlet oxygen was identified as the primary reactive species responsible for ACE degradation, as evidenced by scavenging experiments, probe analysis, and electron paramagnetic resonance spectroscopy. Further analysis through three-dimensional fluorescence spectroscopy revealed the formation of fluorescent degradation products with increased intensity. Potential degradation pathways of ACE were proposed based on the identification of degradation intermediates. Toxicity assessments of the PI/FU system indicate a detoxification effect during ACE degradation, highlighting the system's potential for broader application in various pharmaceuticals.
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