BIOSENSORS & BIOELECTRONICS
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2026
·
IF 11.8
Jixiang Li,Genyun Zhou,Fei Wu,Jinping Yuan,Linan Hu,Qiang Zhang,Wenge Yang,Yonghong Hu
Tetracycline (TC) is a persistent broad-spectrum antibiotic that poses significant threats to human health and the environment. Herein, we developed an ultrasensitive photoelectrochemical (PEC) biosensor for rapid TC detection. The sensor utilizes a flexible Si-doped carbon fiber membrane derived from polyacrylonitrile and dimethyldiethoxysilane as a conductive substrate. After coating with poly (3,4-ethylenedioxythiophene) and polystyrene sulfonate (PEDOT: PSS), a ternary UiO-66-NH 2 /Ag/g-C 3 N 4 Z-scheme heterojunction is assembled as the photoactive core, followed by electrostatic immobilization of laccase to achieve specific TC recognition. Electrochemical characterization confirmed that laccase improved both the biocatalytic activity and electron-transfer efficiency of the electrode. Combined with transient photocurrent measurements and molecular dynamics simulations, the sensing mechanism was shown to be dominated by steric hindrance arising from TC occupation of the laccase active site, followed by oxygen consumption, yielding a detection limit of 0.012 μM over 0-30 μM TC (R 2 = 0.993). UV diffuse reflectance spectra (UV-DRs), Mott–Schottky analysis (M-S), and electron paramagnetic resonance (EPR) measurements further verified that the Ag-mediated Z-scheme pathway significantly enhanced carrier separation. With excellent stability and anti-interference performance in real river water and complex matrices, this work provides an effective strategy for antibiotic detection by integrating flexible carbon-based substrates with advanced Z-scheme photocatalytic systems.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Fuhua Mao,Decai Yang,Kexin Shi,Qiqi Zhou,Chao Qu,Feixing Li,Yujia Lv,Dawei Liang,Qing Ye
Tetracycline (TC) residues in the environment pose serious ecological and health risks, yet conventional treatment methods are often inefficient. Herein, a composite photocatalyst composed of porous graphitic carbon nitride nanosheets (CN) and FeNi 2 S 4 microspheres (FNS) was successfully synthesized via calcination, solvothermal, and electrostatic self-assembly methods. The as-prepared FNS/CN heterojunction exhibited outstanding performance in the visible-light-driven activation of H 2 O 2 for TC degradation, achieving a removal efficiency of 88.9% within 100 min, with a reaction rate constant (k) of 0.0202 min −1 , which is 2.4 and 8.1 times higher than that of pure CN and FNS, respectively. The enhanced activity was attributed to the Z-scheme heterojunction structure, which facilitated efficient charge separation, broadened visible-light absorption, and provided abundant active sites. Meanwhile, the introduction of FNS established an efficient photo-assisted Fenton-like system. Photogenerated electrons continuously accelerated the Fe 3+ /Fe 2+ and Ni 3+ /Ni 2+ redox cycles to in situ activate H 2 O 2 , significantly promoting hydroxyl radical generation. Mechanistic studies revealed that ·O 2 - , 1 O 2 and ·OH were the main active substances, and holes cooperatively promoted the degradation. The catalyst also demonstrated excellent stability and recyclability over five consecutive cycles. This work provides a promising strategy for designing efficient photocatalysts for antibiotic degradation via H 2 O 2 activation.
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ENVIRONMENTAL RESEARCH
·
2026
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IF 8.2
Dongyuan Li,Xiaojun Peng,Rui Zhang,Yadong Chen,Peng Song,Wei Chen,Da Wang
The ubiquitous presence of emerging contaminants (ECs) such as antibiotics and synthetic dyes in aquatic systems necessitates advanced remediation technologies. However, conventional polyvinylidene fluoride (PVDF) membranes often suffer from severe fouling and rapid flux decline due to their inherent hydrophobicity, severely limiting their long-term applicability. This study presents the rational design of Ti-MOF/CN/PVDF composite membranes via integrated solvothermal synthesis of Ti-MOF/g-C 3 N 4 (CN) heterojunctions and nanoparticle-regulated phase inversion. Comprehensive characterization (XRD, XPS, SEM-EDS, BET, AFM) confirmed the successful fabrication of the heterojunction membrane. XPS and XRD analyses confirmed the formation of covalent bonds at the (Ti-O-N) interface and lattice strain induced by the nanoparticle filler, effectively suppressing PVDF crystallization. Ti-MOF/CN exhibits a unimodal particle size distribution (D50 ≈ 400 nm) and high BET specific surface area (72.44 m 2 g −1 ). Its uniform dispersion in PVDF increases the membrane pore size from 28.1 nm in pristine PVDF to 38.7 nm at 1 wt% Ti-MOF/CN, significantly enhancing the overall porosity. The top-performing M3 composite membrane demonstrated exceptional multifunctionality: it achieved retention rates exceeding 90% for multiple dyes (Rhodamine B, Methyl Blue, Malachite Green) and antibiotics (Tetracycline). Long-term retention experiments were conducted on complex wastewater containing mixed dyes, alongside photodegradation tests under simulated solar radiation conditions (AM 1.5G, 100 mW cm −2 ). Results indicate over 95% retention of mixed pollutants. Visible light irradiation significantly enhances the M3 membrane's FRR to 91.6%, further demonstrating the Ti-MOF/CN composite membrane's robust long-term operational stability and self-cleaning capability for photocatalytic degradation of aqueous pollutants.
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高影响因子
ChemSusChem
·
2026
·Vol. 19
·期 7
·e202502708
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IF 5.9
Jiajin Jiang,Xin Wen,Guangguo Niu,Ce Sun,Haiyan Tan,Yanhua Zhang
With increasing attention to fossil fuel consumption and environmental pollution, the development of clean and sustainable biofuels has become increasingly urgent. Hydrothermal liquefaction (HTL) is a promising technology for converting biomass into bio-oil, but traditional HTL processes face challenges such as low conversion efficiency and high energy consumption. To address these issues, this study synthesized a series of B/CN heterogeneous photocatalysts with different BiOCl (BOC) and g-C 3 N 5 molar ratios by solvothermal method and applied them to the photothermal synergistic catalytic liquefaction of cellulose in methanol. Methanol can be recycled and reused. It has been proven that BOC formed a heterojunction with g-C 3 N 5 , extending the photo responsive range of the photocatalyst to the visible light region, promoting the separation and transfer of photogenerated carriers, and optimizing the dispersion of active components. The effect of photocatalyst on the chemical composition and thermal stability of bio-oil was studied. The B/CN-1:2 photocatalyst achieved optimal performance, with a maximum yield of 61.23 • wt% for bio-oil, an higher heating value of 21.39 MJ/kg, and an energy conversion efficiency of 77.41%. Bio-oil is mainly composed of high-value compounds such as alcohols, esters, and ethers, with reduced heavy components and improved thermal stability. Mechanistic studies have shown that the photothermal synergistic effect of B/CN catalysts promotes the cleavage of cellulose glycosidic bonds by generating reactive free radicals through the photodegradation of methanol. This work provides a feasible strategy for improving the efficiency and quality of biomass HTL by designing high-performance photothermal catalysts and offers new insights for the sustainable production of biofuels. Graphical A BiOCl-g-C 3 N 5 heterojunction photocatalyst has been developed and used for the study of photothermal catalysis of cellulose liquefaction to prepare bio-oil. At the optimal ratio, the yield of bio-oil reached 61.23%, with higher heating value of 21.39 MJ/kg, while the thermal stability and component release were well optimized.
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WATER AIR AND SOIL POLLUTION
·
2026
·Vol. 237
·期 13
·779
·
IF 3.5
Peng Ziling,Wang Xiu,Tan Fatang,Zhou Xian,Fan Zeyu,Lu Qi,Chen Xia,Shi Yu,Xia Yu
For the first time, a series of N-doped graphitic carbon-modified g-C 3 N 4 samples were synthesized via thermal polycondensation by incorporating trace amounts of chitosan into melamine precursors. The photocatalytic performance of the samples was evaluated through Rhodamine B (RhB) degradation under visible-light irradiation. The photocatalyst prepared with 50 mg chitosan achieved complete degradation of 10 mg/L RhB within 30 min, outperforming pristine g-C 3 N 4 . After five consecutive cycles, the photocatalyst maintained 91% degradation efficiency within 30 min while preserving its original crystalline structure, demonstrating outstanding stability and reusability. The large specific surface area, enhanced electron transfer efficiency, extended visible light absorption and low photogenerated electron–hole recombination rate were considered to contribute to the extraordinary visible-light-driven (VLD) photocatalytic activity of N-doped graphitic carbon-modified g-C 3 N 4 . Furthermore, a scavenger study was conducted to identify the dominant reactive oxygen species (ROS) involved in the photocatalytic degradation of RhB, providing deeper insights into the underlying reaction mechanisms.
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高影响因子
NEW JOURNAL OF CHEMISTRY
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2026
·
IF 2.6
Yanan Li,Yixiao Shi,Lei Li,Lijun Wang
The development of efficient heterogeneous catalysts for the sustainable upgrading of biomass-derived platform molecules remains a pivotal challenge. Herein, we report a facile strategy for constructing active Lewis acid–base pairs by anchoring well-dispersed zirconium–oxo species onto thermally exfoliated ultrathin g-C3N4 nanosheets. By simply extending the calcination time of melamine to 10 hours, g-C3N4 is simultaneously synthesized and exfoliated into nanosheets with a thickness of ~1.2 nm (approximately 3 layers). These nanosheets offer abundant pyridinic and pyrrolic N atoms, which effectively immobilize the zirconium–oxo species through robust Zr–N coordination, yielding the g-C3N4 /Zr(IV) composite catalyst. In the transfer hydrogenation of furfural to furfuryl alcohol using 2-propanol as the hydrogen donor, this catalyst achieves >90% conversion and >99% selectivity under mild conditions (120 °C). Structural and catalytic characterizations indicate that prolonged calcination increases the specific surface area and the density of edge N–H functional groups, facilitating the generation of more Zr–N active pairs. Poisoning experiments confirm the indispensable role of Lewis acid sites in achieving high conversion and highlight the essential function of basic sites in maintaining exceptional selectivity toward furfuryl alcohol. Furthermore, isotopic labeling studies verify that the hydroxyl hydrogen in furfuryl alcohol originates exclusively from the hydroxyl group of 2-propanol, while its α-hydrogen is supplied from the α-position of 2-propanol. The catalyst demonstrates robust structural and crystalline stability over five consecutive reaction cycles. Notably, partial activity could be restored by methanol washing, and the remaining deactivation is attributed to minimal Zr leaching. This work highlights the potential of nitrogen-rich two-dimensional supports in anchoring zirconium–oxo species for efficient and sustainable biomass conversion.
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Qingmei Yang,Yirui Lin,Yihui Qiu,Chengxiu Wu,Xiaojiao Zhang,Wanxiong Lin,Beibei Wang,Ying Hou,Yanping Lin,Yue Jia
Achieving consistent fabrication of photoelectrochemical (PEC) biosensors remains a challenge, largely due to the variability introduced by manual drop-casting of photoactive materials. To address this limitation, we report a one-step laser-sputtering technique that enables the construction of a standardized sensing platform for ultrasensitive detection of Protein Induced by Vitamin K Absence or Antagonist-II (PIVKA-II), a clinically relevant biomarker for hepatocellular carcinoma. In this process, a mixed target of titanium and melamine is irradiated, where laser-induced thermal and photon pressure effects simultaneously synthesize a TiO 2 /g-C 3 N 4 heterojunction and uniformly sputter-deposit it onto an ITO electrode. This laser-engineered photoanode exhibits excellent batch-to-batch consistency. After immobilizing anti-PIVKA-II antibody, the resulting immunosensor quantifies PIVKA-II based on the specific immunocomplex-triggered photocurrent decrease, achieving a wide linear range from 0.5 ng/mL to 1 μg/mL and a low limit of detection (LOD) of 0.13 ng/mL with high specificity, stability, and reproducibility. Beyond offering a dependable tool for clinical PIVKA-II analysis, this work establishes a generalizable laser-based manufacturing strategy that paves the way toward standardized production of next-generation PEC biosensors.
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COMPUTATIONAL MATERIALS SCIENCE
·
2026
·
IF 3.7
Yuanchao He,Guangxiang Zhang,Huijia Lu,Xiaorong Wang,Ying Yu,Shiguang Wan,Xin Liu,Miao Xie,Guiyan Zhao
This study utilized molecular dynamics simulations to incorporate a poly(lactic acid) (PLA) matrix, poly(butylene adipate-co-terephthalate) modified with glycidyl methacrylate (PBAT-g-GMA), and thermoplastic starch (TPS) into an amorphous unit cell via a one-step blending method. Additionally, five PLA/PBAT-g-GMA/TPS (70/30/0, 70/25/5, 70/20/10, 70/15/15, 70/10/20) amorphous unit cells were created using a stepwise blending method. The radial distribution functions, hydrogen bond distribution, cohesive energy density, mixing energy, and diffusion coefficient of the blend components were analyzed. The optimal composition, identified through simulations, was subsequently prepared, and its glass transition temperature (T g ) was determined using differential scanning calorimetry (DSC). The fracture surface was examined via scanning electron microscopy (SEM). Results showed that the one-step blending model did not form a distinct core-shell interface, whereas higher PBAT ratios in the stepwise blending model exhibited clearer core-shell interfaces. The 70/20/10 composition model exhibited the highest mixing energy (1067.0 kcal/mol). The number of hydrogen bonds at the PBAT-TPS interface was maximized in this model, indicating the strongest interfacial interaction. The predicted T g of the 70/20/10 composition model was 59.9 °C, differing by only 0.6 °C from the measured value. The core-shell structure was observed on the frozen fracture surface, confirming the reliability of the model predictions. This study systematically analyzed the formation, distribution, and interaction of the core-shell interface in the PLA-based ternary blend system using molecular dynamics simulations and multi-indicator analysis. An optimal blending ratio was identified, providing a theoretical foundation for future material design and optimization.
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DIAMOND AND RELATED MATERIALS
·
2026
·
IF 5.2
Jiaqi Yu,Shiwen Wang,Minghong Xie,Qiong Wu,Qing Shu
To overcome rapid charge recombination, a direct Z -scheme Zn 3 V 2 O 8 /g-C 3 N 4 heterojunction was designed, thus boosting photocatalytic performance. A suite of composite photocatalysts, with meticulously tuned Zn 3 V 2 O 8 mass ratios (x = 40, 60, and 80 wt%), were synthesized via a facile hydrothermal route. Comprehensive characterization, including XRD, SEM, UV–Vis DRS, PL spectroscopy, and photo-electro-chemical measurements confirmed the formation of intimate interfacial contact between Zn 3 V 2 O 8 and g-C 3 N 4 . This tailored interfacial architecture effectively promotes visible-light absorption and facilitates the separation and transfer of photo-generated charge carriers. Notably, the Zn 3 V 2 O 8 (60 wt%)/g-C 3 N 4 composite achieved 91% degradation of RhB within 120 min under simulated solar irradiation, substantially outperforming pristine g-C 3 N 4 (57%). Radical trapping experiments and electron spin resonance (ESR) spectroscopy identified superoxide radicals ( O 2 − ) and holes (h + ) as the primary active species. Based on these findings, a direct Z -scheme charge transfer mechanism is proposed, wherein photoinduced electrons in the conduction band of Zn 3 V 2 O 8 recombine with holes in the valence band of g-C 3 N 4 . This synergistic recombination pathway preserves the most energetic electrons in g-C 3 N 4 and holes in Zn 3 V 2 O 8 , endowing the system with strong redox capacity for the simultaneous generation of O 2 − and OH radicals, which collaboratively drive the efficient degradation of RhB. This study provides a rational design framework for constructing high-performance g-C 3 N 4 -based Z -scheme photocatalytic systems.
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Surfaces and Interfaces
·
2026
·
IF 6
TianXiang Li,RuoKun Jia,PengPeng Wang,DuMin Li,JiaHui Chen,Xubo Song
Through a simple hydrothermal strategy, a strongly coupled g‑C 3 N 4 /Hf‑MOF heterojunction (CN/HUN) was successfully prepared, achieving efficient and selective photocatalytic CO 2 reduction to methanol without sacrificial agents. After reacting for 3 hours under simulated sunlight conditions without a sacrificial agent, the optimized CN/HUN 7 catalyst achieved a cumulative methanol yield of 520.48 μmol g -1 and a selectivity of 83%. Systematic characterization indicates that the strong interfacial interactions and electronic coupling between g-C 3 N 4 and Hf-MOF effectively accelerate charge separation, suppress carrier recombination, and significantly reduce charge transfer resistance. Furthermore, the Hf-MOF forms a Z-type heterojunction structure with g-C 3 N 4 , thereby enabling directed electron transfer. While electrons in the conduction band (CB) of the Hf-MOF are transferred to the valence band (VB) of g-C 3 N 4 , the unsaturated Hf 4+ sites may promote CO 2 adsorption and activation through Lewis acid-base interactions and are expected to stabilize key intermediates during the CO 2 reduction process, thereby enhancing the performance of CO 2 reduction to methanol. We demonstrate a viable route to construct tightly integrated MOF heterojunctions for high-performance photocatalytic CO 2 reduction to fuels. Download: Download high-res image (236KB) Download: Download full-size image
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MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Yi Liang,Ke Huang,Jin-Wen Liu,Yumin Wang
Thioflavin T as split G-quadruplex fluorescent dye was researched. • A novel sensing method based on CoOOH nanoflakes and HCR was proposed. • Label-free and sensitive detection of miRNA-21 was successfully realized. To date, various fluorescent probes for G-quadruplex have been reported. However, the development of fluorescent dyes for split G-quadruplex formed on double-stranded DNA structure still remained largely unexplored. Herein, we have demonstrated that thioflavin T (ThT) was able to intercalate into split G-quadruplex sequence and the formed split G-quadruplex-ThT structure exhibited remarkable fluorescence enhancement. By integrating cobalt oxyhydroxide (CoOOH) nanoflakes and hybridization chain reaction (HCR), a sensitive and label-free biosensing strategy for miRNA detection was proposed. In our design, miRNA-21 was chosen as the model target and it was capable of triggering HCR with two split G-quadruplex sequence-contained hairpin probes, resulting in the generation of long chain-like HCR product. Unlike hairpin probes, the HCR product cannot be adsorbed onto CoOOH nanoflakes because of lower affinity. Consequently, in the presence of ThT, numerous split G-quadruplex-ThT structures on HCR product were formed and the target miRNA was converted into amplified and activatable fluorescence signal. Experimental results demonstrated that this novel sensing strategy can be applied for sensitive and selective detection of miRNA. Moreover, the analysis of miRNA in complex biological media was successfully realized, offering a robust, label-free and cost-effective platform for miRNA-related disease diagnosis and biomedical research. A novel fluorescence biosensing strategy based on cobalt oxyhydroxide (CoOOH) nanoflakes and hybridization chain reaction (HCR) was developed for sensitive and label-free detection of miRNA-21. Download: Download high-res image (161KB) Download: Download full-size image
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·123517
·
IF 7.5
Bingxin Zhou,Yuebin Liu,Shuangshuang Ding,Leixia Meng,Huijuan Jing,Chaochao Tian,Ruijie Guo,Sheng Liu,Aiguo Zhou,Gui-Fang Huang,Wei-Qing Huang
To address the critical issues in nickel single-atom catalysts, including severe aggregation, poor controllability of coordination environment, and weak metal-support interaction. Herein, melamine-cyanuric acid supramolecules were used as precursors. One-step air calcination and pre-oxidation followed by argon calcination were adopted to fabricate a series of Ni single-atom decorated g-C 3 N 4 photocatalysts (CN-Ni x -I and CN-Ni x -II series). The pre-oxidation treatment significantly increased the specific surface area of the material, narrowed the band gap, and shifted the conduction band potential to a more negative direction, thereby enhancing the light-harvesting capability and the separation efficiency of photogenerated carriers. The optimal sample CN-Ni 2 -II exhibited a photocatalytic hydrogen evolution rate of 920.12 μmol h −1 g −1 , which was 4.55 times that of pure CN-II and 2.76 times that of the one-step calcined sample CN-Ni 2 -I. Mechanism analysis confirmed that the synergistic effect of the strong interfacial interaction co-constructed by C–O–Ni bonds and N coordination, the optimized band structure, and the hierarchical mesoporous structure was the core driving force for the significant improvement of its photocatalytic performance. This work provides a new path for the simple preparation and performance regulation of high-efficiency non-noble metal single-atom photocatalysts, and also offers practical reference for the interfacial engineering design of single-atom catalytic systems.
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