Scientific Reports
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2026
·
IF 3.9
Zhang Zutao,Xiao Peiyuan,Mei Jinping,Zhang Xinyu,Dai Anni,Wang Lei,Yao Qiufang
Chlorinated pharmaceuticals like diclofenac (DCF) pose persistent environmental risks due to their bioaccumulation and toxicity, necessitating advanced remediation strategies. Herein, an integrated electrochemical system was developed, combining a self-nitrogen-doped carbon nitride (CN)-supported PdNi (CN@PdNi) cathode for electrocatalytic hydrodechlorination (ECH) with a CN anode for oxidative mineralization in a single, sequential process. The CN@PdNi cathode achieved 98.6% ECH efficiency, selectively cleaving C–Cl bonds to mitigate toxicity, which is attributed to its structural merits, including a well-dispersed, albeit partially clustered, nanoparticle distribution, metallic Pd/Ni phases, predominant Pd 0 /Ni 0 states, and enhanced porosity. Subsequent CN anodic oxidation enabled 96.8% total organic carbon (TOC) removal, ensuring near-complete mineralization. Mechanistic studies via Electron paramagnetic resonance (EPR), quenching, LSV, and Tafel slopes revealed atomic hydrogen (*H) generated at Pd 0 sites as the primary reactive species, augmented by electron transfer. The system exhibited robust performance across varied conditions and exceptional stability (< 1% efficiency loss over 11 consecutive cycles). Toxicity assessments showed 3–5 Log 10 unit reductions (ECOSAR) and mung bean germination rates improving from 68.7 to 99.8%. This dual-functional detoxification-mineralization strategy overcomes the limitations of single-step processes and offers a scalable, sustainable solution for efficient remediation of halogenated pollutants.
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JOURNAL OF ELECTRONIC MATERIALS
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2026
·
IF 2.8
Li Wenting,Wang Xinting,Liu Sanmei
Co 3 O 4 is a promising electro-oxidation catalyst, which is applicable to the oxygen evolution reaction (OER) and glucose oxidation reaction (GOR). However, its insufficient active sites and poor conductivity severely restrict its practical application. Herein, a Co 3 O 4 /CN electrocatalyst derived from zeolitic imidazolate framework (ZIF)-67/CN was successfully synthesized via a solvent-free strategy for efficient OER and GOR. In electrocatalytic OER, Co 3 O 4 /CN demonstrated superior performance on a glassy carbon (GC) electrode, achieving an overpotential ( η ) of 306 mV at a current density ( j ) of 10 mA cm −2 , which outperformed Co 3 O 4 -ZIF (Co 3 O 4 /CN derived from ZIF-67). Furthermore, the Co 3 O 4 /CN electrocatalyst also exhibited good GOR ability, with high sensitivity of 1021.9 μA mM −1 cm −2 , a low detection limit of 1.8 μM ( S / N = 3), a broad linear range from 2 μM to 2.1 mM, excellent repeatability and reproducibility (relative standard deviation [RSD] < 6%), and long-term stability up to 3 weeks. The enhanced activity may be ascribed to the rich active sites, porous structure, and improved electrical conductivity of Co 3 O 4 /CN. This work provides a feasible strategy for enhancing electrocatalytic activity toward OER and GOR using metal–organic framework (MOF)/CN-based materials.
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CATALYSIS LETTERS
·
2025
·Vol. 155
·期 8
·1-13
·
IF 2.4
Wumaer Mailidan,Ai Jiakun,Abdulla Rahima,Akbar Mustafa,Wang Jide
Cobalt-based composites have demonstrated promising catalytic potential for organic pollutant degradation. However, the influence of exposed basal facets on their catalytic activity remains insufficiently explored. In this study, Co@CN, Cu/Co@CN, and Zn/Co@CN composites with preferentially exposed Co(111), Cu(111)/Co(111), and Co(111)/Zn(002) facets, respectively, were synthesized via a facile hydrothermal method. The facet-dependent catalytic performance and reaction mechanisms were systematically investigated through the reduction of 4-nitrophenol (4-NP). Experimental results combined with density functional theory (DFT) calculations revealed that the Co(111) facet was identified as a critical determinant of both catalytic activity and reaction pathways. Furthermore, we also tried to reveal how the preferential growth of co-exposed facets (Cu(111)/Co(111) and Co(111)Zn(002)) modulate catalytic activity and reaction pathways. As a results, the Cu/Co@CN with preferential exposed facet Cu(111)/Co(111) achieved increasing efficiency in reducing 4-NP to 4-aminophenol (4-AP) within 90s, with a pseudo-first-order rate constant (k) of 0.720 min -1 . Revealing that the synergy between Cu(111) and Co(111) exemplifies how crystal facets synergistically influenced to catalytic activity and reaction process. Moreover, the catalysts also showed durability over six cycles. The outcomes of this study provide new insights into comprehensiveness exposed crystal plane dependent activity and the design of efficient transition-metal catalysts using the facet strategy for effective degradation of certain pollutants in wastewater. Graphical
研究领域:
催化
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材料科学
·
环境化学
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纳米技术
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表面科学
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化学反应工程
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FlatChem
·
2022
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IF 5.829
Shuting Hu,Yuheng Liang,Fuming Chen,Guannan He,Yinzhen Wang,Wei Li,Qinyu He
It is important for organic pollutants to be completely degraded without intermediates. In this work, a novel wide-spectrum-response oxygen-rich double direct Z-scheme heterojunction-structured photocatalyst, g-C 3 N 4 (precursor: urea, CN-U)/g-C 3 N 4 (precursor: thiourea, CN-T)/Bi 2 WO 6 (UTB), was prepared. The ternary system was confirmed by structural analysis and surface and morphological studies. The photocatalytic performances of the synthesized catalysts were estimated by photodegrading rhodamine B (RhB) solution. A more than 92 % mineralization and improved photocatalytic activity were achieved. UTB showed an outstanding photocatalytic performance for RhB degradation compared to CN-T, CN-U, Bi 2 WO 6 , and their binary nanocomposites.The improved photocatalytic properties and n more than 92 % mineralization were attributed to the double direct Z-scheme and oxygen vacancies, which maintained the outstanding redox capability of the electrons, expanded the range of light absorption, and facilitated the separation of photogenerated carriers. This study has demonstrated the prospect in obtaining a double Z-scheme structured photocatalysts with simultaneously high redox potential and narrow E g . This work has also offered a new strategy for fabricating low-consumption and efficient photocatalysts that mineralize more than 92 % of organic pollutants without existing intermediates.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Shouze Li,Zhou Li,Dongyan Xu,Run Hu
Emerging thermocells exhibit a significant potential in low-grade heat harvesting owe to their high mV-scale thermopower, low cost, and high robustness. Fundamentally, three effects contribute to the thermopower enhancement of liquid thermocells, i.e. original concentration effect, solvation effect, and normalized concentration gradient effect. Yet, the contribution of the solvation effects and the normalized concentration gradient in organic solvents remains a subject of debate. In this paper, we integrate experiments, spectral analysis, and electrochemical theory to demonstrate that the normalized concentration gradient dominates the enhancement of thermopower in the investigated organic solvents, whereas the solvation effect is weak. Further, the introduction of ethanol results in a thermosensitive solubility of K 4 Fe(CN) 6 and a minimal concentration at the cold end, which establishes a huge substantial normalized Fe(CN) 6 4- concentration gradient and increases the Seebeck coefficient to 3.4 mV/K. Simultaneously, the precipitation resulting from the introduction of an organic solvent notably diminishes the heat convection within the system. As a result, the optimized TC-35EtOH system yields a ZT value (0.094) and Carnot-relative efficiency (2.52 %) that are 7 times greater than those of its initial counterpart. Additionally, the system’s high power density of 3.64 W/m 2 suggests its potential for harnessing low-grade heat waste energy.
研究领域:
物理化学
·
能源材料科学
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POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 6
·2508-2516
·
IF 3.665
Tao Zheng,Wengui Wang,Yaochi Liu
In this work, a novel phosphorus–nitrogen flame retardant (CN-DOPO), which was successfully prepared via a facile method of graphitic carbon nitride (g-C 3 N 4 ) and 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO). Polyamide 6 (PA6) composites were then prepared through melt blending with different ratios of g-C 3 N 4 /DOPO and different contents of CN-DOPO. CN-DOPO was characterized and confirmed using X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR), and scanning electron microscopy (SEM). PA6/CN-DOPO composites were investigated by limiting oxygen index (LOI), vertical combustion (UL-94), thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), and thermogravimetric analysis-infrared spectrometry (TGA-IR). The results indicated LOI value was increased from 23.4% to 29.2% and successfully passed UL-94 V-0 rating when the presence of CN-DOPO increased to 15 wt%. Moreover, mechanical properties of PA6/CN-DOPO composites had not deteriorated significantly due to CN-DOPO having better dispersion and compatibility in PA6. The morphological of char layer revealed that CN-DOPO formed a highly integrated char layer surface during the combustion process, as compared to that of pure PA6. Meanwhile, CN-DOPO decomposed to release gases could inhibit decomposition by diluting flammable volatiles. Accordingly, the special gas-condensed phase synergistic flame-retardant mechanism of PA6/CN-DOPO was proposed. This work indicated that CN-DOPO could endow PA6 with highly effective flame-retardant and good mechanical performance.
研究领域:
材料科学
·
高分子化学
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SENSORS AND ACTUATORS B-CHEMICAL
·
2018
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IF 5.667
Fang Hu,Wancun Zhang,Jiaqi Zhang,Qi Zhang,Tao Sheng,Yueqing Gu
In this study, a simple, economic, and label-free electrochemical biosensor was developed for highly sensitive and selective miR-21 detection based on Fe(CN) 6 3− /Fe(CN) 6 4− electrochemical signal, which relies on DNA structures conjugating with carboxyl multi-wall carbon nanotubes (MWCNTs-COOH)-modified glassy carbon electrode (GCE). High sensitivity and specificity of the biosensor were achieved by taking advantage of the target-recycled non-enzymatic amplification strategy (TRNEAS), which relies on sequence-specific hairpin strand displacement and does not require the addition of environment-susceptible enzymes. Besides, the SP-DNA strictly binds to the cMWCNTs/GCE via amide bonds, which ensure good electrochemical results and excellent stability for target miRNA detection. The developed miR-21 electrochemical biosensor exhibited a broad linear dynamic range of 0.1 fmol to 5 pmol and a detection limit of 56.7 amol for miR-21 detection in vitro . The relative miR-21 expression levels were particularly detected by our developed miR-21 biosensor and were highly consistent with the stem-loop RT-PCR results. In summary, our developed electrochemical biosensor exhibits great potential for further application in biomedical research and early clinical diagnosis.
研究领域:
生物传感器
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电化学
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纳米技术
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分子生物学
·
临床诊断
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CHINESE JOURNAL OF CATALYSIS
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2015
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IF 1.964
Yan Li,Bing Li,Ting Chen,Zhicheng Zhou,Jun Wang,Jun Huang
A vanadium doped graphitic carbon nitride catalyst has been prepared and used for the direct hydroxylation of arenes with O 2 . Substituted arenes with electron-withdrawing groups such as CN, NO 2 , COOH, CF 3 , and COCH 3 were oxygenated to the corresponding phenols in moderate yields. The catalyst also proved applicable for the hydroxylation of aromatic halides (F, Cl, and Br) with O 2 .
研究领域:
化学
·
催化科学
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Chemosensors
·
2026
·Vol. 14
·期 3
·
IF 4.4
Yiyuan Zhang,Chen Zhou,Jiaxin Li,Evgeny Kovtunets
A novel acridine-based fluorescent sensor (Sensor ANT) for the highly selective and sensitive detection of cyanide ions (CN−) was rationally designed and synthesized via the conjugation reaction of acridine-9-amine with 3-nitrophenyl isothiocyanate. The sensing mechanism is triggered by the specific interaction between exogenous CN−and the hydrogen-bonding moieties within the sensor’s molecular framework, which induces a distinct fluorescence quenching response. Systematic titration experiments confirmed that Sensor ANT exhibits rapid response kinetics, excellent selectivity, and reliable qualitative/quantitative detection capabilities toward CN−. Complementary biocompatibility assays, including in vitro cellular imaging and in vivo zebrafish experiments, further verified the promising application potential of this sensor in practical and biological detection scenarios. The detection limit (DL) of Sensor ANT for CN−was calculated to be 2.89 × 10−7M, with a 1:1 binding stoichiometry and a binding constant of 1.95 × 104M−1. These findings demonstrate that Sensor ANT represents a robust candidate for CN−detection in environmental and biological systems.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·Vol. 143
·期 32
·e70922
·
IF 3.1
Shaorong Zeng,Huanyu Wu,Xiaoyi Fu,Junning Gao,Zhenya Lu
Hematite (α-Fe 2 O 3 ) is a promising supercapacitor anode due to its high theoretical capacity, low cost, and eco-friendliness, yet its application is hindered by poor conductivity and structural instability. Herein, a unique Fe 2 O 3 composite encapsulated within a polyaniline-derived N, S, Cu-doped carbon layer was fabricated on carbon cloth via an integrated method involving hydrothermal growth, Cu 2+ -catalyzed electrodeposition, and carbonization. This conformal carbon sheath acts as a synergistic conductive network, mechanical buffer, and source of active sites. The optimized Fe 2 O 3 /CN electrode exhibits a high specific capacitance of 517.15 F g −1 at 1 A g −1 and dramatically enhanced cycling stability with 92.48% retention after 5000 cycles, far exceeding pure Fe 2 O 3 (51.15%). The assembled solid-state asymmetric supercapacitor (Fe 2 O 3 /CN@CC//PANI@CC) delivers an energy density of 33.82 Wh kg −1 at 737.5 W kg −1 and maintains 87.57% capacity after 5000 cycles. This work demonstrates an effective polymer-derived carbon coating strategy for developing durable, high-performance metal oxide-based electrodes.
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MATERIALS RESEARCH BULLETIN
·
2022
·
IF 5.6
Xiuna Yu,Zhixiang Liu,Zhi Zhu,Hongyu Luo
A nonmetal two-dimensional carbon nitride (2D-CN) with different thickness is constructed via the facile hydrothermal (adjusting the solution pH to 4.0, 7.0 and 10.0) and calcination method. The 2D-CN-7.0 displays the dramatically enhanced photocatalytic activity (82%) for degrading 2-mercaptobenzothiazole (MBT), originating from the ultrathin 2D structural improved transfer efficiency of charge carriers, greatly decrease the diffusion path of electrons/holes to MBT, accelerating the reaction rate. More importantly, we find that there are no rules can be followed between the band gap and the thickness of CN by density functional theory (DFT) computation theoretically and experimentally. Also, the possible mechanism for the enhancement of photocatalytic performance, the degradation pathway of MBT, photogenerated carrier transfer behaviors are also discussed in depth. This research provides a new strategy to control the thickness of CN to improve photocatalytic activity.
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DALTON TRANSACTIONS
·
2019
·Vol. 48
·期 11
·3658-3663
·
IF 4.052
Naike Shi,Qilong Gao,Andrea Sanson,Qiang Li,Longlong Fan,Yang Ren,Luca Olivi,Jun Chen,Xianran Xing
Negative thermal expansion (NTE) behavior is an interesting physical phenomenon, but the number of NTE materials is limited. In this study, a new NTE compound has been found, FeFe(CN)6 Prussian blue analogue, where the average linear coefficient of thermal expansion (αl) is −4.260 × 10−6 K−1 between 100 and 450 K. The NTE properties and local vibration dynamics have been investigated by joint experiments of synchrotron X-ray diffraction, X-ray pair distribution function, and extended X-ray absorption fine structure spectroscopy. It has been observed that the Fe–C/Fe–N bonds expand with increasing temperature, while the unit cell shrinks in FeFe(CN)6. The vibration directions of both Fe–C and Fe–N prefer to be perpendicular to the linkage of Fe–CN–Fe rather than being parallel. More pieces of evidence indicate that the transverse vibrations of N atoms dominate the NTE behavior of FeFe(CN)6. The present results prove directly that the transverse thermal vibrations of C and N atoms are crucial for the occurrence of the NTE of Prussian blue analogues.
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