ACS Sensors
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2026
·
IF 10.9
Zhang Ziqiang,Yang Ruiming,Zhao Linfeng,Wang Jiabao,Wang Zhipeng,Yang Bowen,Zhang Yanlin,Zhang Yeguang,Fang Fang,Wang Peng,Li Feihu,Zhan Zili
Developing gas sensors that achieve high sensitivity, a low detection limit, and superior selectivity continues to be a critical challenge for the detection of acetone in exhaled breath. Metal oxide semiconductors (MOS) are extensively utilized in chemiresistive gas sensors, largely because of their distinguished gas sensing performance and tunable physicochemical properties. However, unmodified MOS nanostructures are prone to aggregation and lack an effective mechanism for efficient charge separation, thus exhibiting the features of limited specific surface area, low porosity, and sluggish charge migration rate, which deteriorates gas sensing performance. In this study, we employed the impregnation method and sacrificial template method to prepare a three-dimensional inverse opal (3DIO) WO 3 composite loaded with graphitic carbon nitride (g-C 3 N 4 ). This composite shows outstanding acetone sensing capability. Specifically, it achieves a response of 7.33 at 10 ppm, a detection limit of 65 ppb, favorable selectivity, and reliable stability. Such superior sensing behavior benefits greatly from the synergistic effect of abundant active sites endowed by its unique 3D ordered macroporous structure and accelerated interfacial charge transfer from the n-n heterojunction formed between WO 3 and g-C 3 N 4 . Consequently, the construction of WO 3 /g-C 3 N 4 composites with a three-dimensional ordered macroporous architecture offers a promising strategy for real-time and accurate acetone detection, as well as for the development of portable breath analysis sensors.
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PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9.1
Liuqing Yang,Zhuoting Xiong,Haowen Zou,Bin Zhao,WingKei Ho,Dingze Lu
Improving the efficiency of nitric oxide (NO) removal while reducing the formation of toxic nitrogen dioxide (NO 2 ) is a challenge. Nonetheless, it remains uncertain regarding the distinct roles of carbon versus nitrogen vacancies in graphitic carbon nitride (g-C 3 N 4 ) in governing the oxidation pathway. In this study, g-C 3 N 4 enriched with carbon or nitrogen vacancies, along with the corresponding polyvinylidene fluoride (PVDF)-supported composite films, are prepared. The adsorptions and anchoring of NO and its intermediates are significantly enhanced by the carbon vacancies. Despite a high free energy barrier of the conversion from nitrite to nitrate, the strong anchoring suppresses the release of gaseous NO 2 . The formation of Nitrogen vacancies gives rise to polarization of the spin, leading to a significant negative displacement of the potential of the conduction band and increased carrier lifetime along with a considerable decrease in the barrier for the conversion of nitrite to nitrate. This mechanism leads to enhanced reaction flux that will improve deep oxidation. The incorporation of these materials into the PVDF film greatly enhances performance and provides reusability. This work elucidates the distinct mechanisms by which carbon and nitrogen vacancies regulate NO oxidation, providing a theoretical basis for designing efficient and selective air purification materials.
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Catalysts
·
2026
·Vol. 16
·期 8
·707
·
IF 4.5
Zibin Hai,Jingwei Han,Mengyao Xue,Yunhua Zhang
In semiconductor photocatalysis, the strong redox ability of a wide band gap and the broad light absorption range of a narrow band gap are a pair of irreconcilable trade-offs. By combining semiconductors with different band gap widths and band edge positions, both of these advantages can be achieved simultaneously. A ternary Cu2O-SnO2/g-C3N4(CuSnCN) composite photocatalyst was prepared through the hydrothermal and calcination method. Structural analyses confirm the successful integration of truncated octahedral Cu2O, spherical SnO2, and layered g-C3N4, which extends the visible-light response to 650 nm. The optimized system achieves a remarkable 96.58% degradation of methyl orange (80 min, 0.2 g/L catalyst, pH = 3) through dual heterojunction synergies: p–n junctions (Cu2O/g-C3N4and SnO2/g-C3N4) and Z-scheme charge transfer (SnO2/Cu2O), with •O2−/h+identified as the dominant reactive species. This work establishes a tunable heterojunction platform for the elimination of multiple pollutants through engineered radical-generation pathways.
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高影响因子
NANO
·
2025
·
IF 1.1
Jinglin Wang,Yuntian Wei,Shikun Chen,Chan Zheng
Efficient interfacial carrier transfer and separation can effectively enhance photocatalytic activity. In this study, a high-performance Z-scheme Ti 3 C 2 @TiO 2 /g-C 3 N 4 (TCTCN) ternary photocatalyst possessing a hollow flower-like architecture was synthesized using a reliable and effective method. Ti 3 C 2 @TiO 2 heterojunctions were constructed because exfoliated Ti 3 C 2 was partially oxidized to TiO 2 during the formation of hollow g-C 3 N 4 flower-like microspheres. In the Z-scheme heterojunction, the highly conductive metallic Ti 3 C 2 layers functioned as solid-state electron mediators, promoting electron–hole separation and migration efficiency. Under visible-light irradiation, the as-synthesized TCTCN photocatalyst possessed outstanding photocatalytic tetracycline (TC) degradation efficiency that was 2.03-fold and 1.25-fold higher than those of individual layered and hollow flower-like g-C 3 N 4 , respectively. The excellent photocatalytic TC degradation efficiency is attributed to the unique hollow structure and synergy among the Ti 3 C 2 , TiO 2 and g-C 3 N 4 structures in the TCTCN composite, enabling the Z-scheme-mechanism-assisted rapid separation and slow recombination of photoinduced electron–hole pairs because of the increased photocatalytic activity. Moreover, the TCTCN ternary hybrid photocatalysts possessed good physical stability and reusability, and the TC degradation efficiency negligibly decreased after five cycles. This work is an important development to establish a sound foundation for designing g-C 3 N 4 -based hybrid photocatalysts possessing substantial charge carrier separation and transfer for efficiently degrading antibiotics.
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高影响因子
Journal of Cleaner Production
·
2026
·
IF 10.7
Shanshan Sun,Yurong He,Tianqi Tang,Siyu Hui
While semiconductor-based photocatalysis presents a promising avenue for CO 2 reduction, the application of conventional TiO 2 is restricted by its limited light absorption, short photogenerated charge carrier lifetime, and poor CO 2 adsorption capability. To overcome these constraints, we constructed multifunctional Ag/Cu-TiO 2 /graphitic-phase polyacrylonitrile (g-PAN) composites. In this system, g-PAN functions as a robust support for Ag/Cu nanoparticle-loaded TiO 2 fibers synthesized via electrospinning and heat treatment. UV–Vis NIR DRS analysis reveals synergistic light harvesting where the localized surface plasmon resonance of Ag/Cu nanoparticles extends absorption into the near-infrared and g-PAN doubles the intensity by trapping photons within nanocavities. Beyond these optical benefits, g-PAN enhances CO 2 adsorption and accelerates charge transfer. Consequently, the Ag/Cu-TiO 2 /g-PAN composite achieves a CO evolution rate of 11.82 mmol/g/h under simulated solar irradiation, representing a twice increase compared to the Ag/Cu-TiO 2 counterpart. As evidenced by Electrochemical Impedance Spectroscopy and instantaneous photocurrent response, g-PAN acts as an electronic bridge that significantly reduces the resistance to photogenerated charge migration. This study provides novel insights into designing highly efficient composite photocatalysts for sustainable CO 2 conversion, contributing to the advancement of cleaner production and green technologies.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Yunqing Xia,Shaomu Wen,Ming Wen,Yongzhao Fan,Jing Yan,Liu Xiaobo
In this work, a waterborne-based epoxy composite coating with great anticorrosive capability was developed by applying an ultrasonic aqueous mixture of nanocrystalline cellulose (NCC) and graphitic carbon nitride (g-C 3 N 4 ) nanosheets as an ideal reinforcing nanofiller for metallic surface prevention against corrosion. The characterization results demonstrated that g-C 3 N 4 nanosheets acquired outstanding aqueous dispersion and displayed a homodisperse state in epoxy matrix after ultrasonic process with NCC, providing efficient barrier performance for epoxy coating to block the corrosive substances’ ingress. The electrochemical impedance spectroscopy (EIS) measurement outcome revealed that epoxy coating with the incorporation of NCC and g-C 3 N 4 nanohybrids (g-C 3 N 4 @NCC) held at the impedance value of 7.338 × 10⁶ Ω·cm² through the 40 days-immersion process, which improved by an order of magnitude by contrast with original epoxy coating. Besides, the results of salt spray test confirmed that the g-C 3 N 4 @NCC composite coating with artificial scratch accumulated the least amount of corrosion products in high-concentration salt fog conditions, remaining consistent with the anti-corrosion effectiveness trend obtained from EIS.
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高影响因子
APPLIED CATALYSIS A-GENERAL
·
2026
·
IF 4.8
Shilong Teng,Qiang Le,Zhaodong Nan
The rational design and fabrication of high-efficiency catalysts for Fenton-like reactions have become a central research direction. As a recently emerging catalyst of great interest, the catalytic performance of bimetal-doped g-C 3 N 4 (graphitic carbon nitride) is still limited by the electron transfer. In this study, Fe and Mn co-doped g-C 3 N 4 (designated as Fe/Mn-CCN) was prepared via a co-sintering method, which an internal electric field was formed via a homojunction generation from the introduction of cyano groups (-C N) in Fe/Mn-CCN, enhancing electron transfer and catalytic activity for the degradation of tetracycline (TC) through the Fenton-like reaction. Simultaneously, it modulated the electronic density of metal active sites to enhance the adsorption capacity for TC and PMS. The rate constant of the reaction is 4.34 times higher than that of the pristine bimetallic catalyst (Fe/Mn-CN). The turnover number (TON) of Fe/Mn-CCN reaches as high as 32 × 10 −4 (g/L min) −1 , outperforming most reported graphitic carbon nitride (g-C 3 N 4 )-based catalytic systems with a significant enhancement in catalytic efficiency. Furthermore, the degradation efficiency retains 90% after continuous cyclic reactions for 12 h, demonstrating its excellent structural stability. This study provides a new perspective for the development of environmentally friendly materials used in pollutant degradation.
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高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Yuye Xuan,Yong Wei,Songquan Li,Chunlan Liu,Qian Yang,Zhihai Liu
To detect the degree of interaction between coptisine and different DNA G-quadruplexes (G4s) and screen its anti-cancer targets, this paper developed a highly sensitive fiber surface plasmon resonance (SPR) sensor using zirconium-based metal organic framework (MOF-808) nanomaterials and plastic coated multimode optical fiber, which solves the problems of background interference and low sensitivity in traditional fluorescence detection method. MOF-808 has the characteristic of high electron mobility, which increases the sensitivity of the sensor to 4869.03 nm/RIU and improves the performance by 107%. Meanwhile, thanks to the ultra-high specific surface area of MOF-808, coptisine is enriched on the sensor surface, providing more G4s binding sites, the detection limit for c-MYC Pu22 G4 is 11.15 nM. Three types of G4s were detected using the sensor, and the sensor showed a significant response to c-MYC Pu22 G4, indicating that coptisine has a strong targeting effect on Pu22 G4, which is consistent with the results of molecular docking simulation, confirming the effectiveness of the sensor as a drug target screening validation tool. This sensor exhibits good specificity, with no significant response to other substances such as double stranded DNA except for the substance being tested, and maintains excellent stability after long-term storage. This work provides a concept validation optical sensing platform for drug target screening.
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122439
·
IF 7.5
Yourong Zhao,Yuhong Xie,Yiying Wang,Hongda Li,Daojiang Gao,Zhanglei Ning
Excessive levels of phosphate ions (PO 4 3- ) pose serious risks to human health and environmental ecosystems. In this work, a ratiometric fluorescent probe, G-CDs@Eu-MOFs composite, was designed and synthesized via a post-synthetic modification strategy. The composite was employed for selective detection of phosphate ions. The resulting probe displays two well-resolved fluorescence emission peaks at 419 nm and 616 nm, which exhibits distinct responses to phosphate ions, thereby providing an intrinsic self-calibration capability. Upon interaction with PO 4 3- , the probe demonstrates a strong linear response (I 419 /I 616 ) over the concentration range of 10 −4 M to 4.5 × 10 −3 M, with a high correlation coefficient (R 2 = 0.9986). The detection limit (LOD) is determined to be 0.927 μM. A clear fluorescence color shift from blue-red to blue allows for rapid visual identification of phosphate. Furthermore, by integrating the probe with a smartphone-based platform, a user-friendly, accurate, and portable approach is established for on-site and real-time monitoring of phosphate. This strategy shows considerable promise for environmental and biomedical applications.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2026
·
IF 7.1
Yining Zhang,Jiahao Gan,Mengyang Xu,Jinze Li,Xiang Liu,Zhengyu Chen,Aigang Zhang,Pengwei Huo
Dual-electric-field coupling of the S-scheme g-C 3 N 4 /BiOCl heterojunction and β-PVDF piezo-polarization modulates oxygen-vacancy energy levels for efficient charge separation. • An oxygen-vacancy-rich g-C 3 N 4 /BiOCl photocatalyst is integrated into a porous PVDF membrane, achieving stable immobilization and rapid mass transport. • The multifunctional membrane delivers a high piezo-photocatalytic rate of 0.04012 min −1 and 98.21 % tetracycline removal under light-mechanical coupling. • The composite membrane exhibits excellent recyclability and enables synergistic piezo-photocatalytic purification for antibiotic-contaminated wastewater. Oxygen vacancies (O Vs ) play an important role in photocatalysis, but exploiting O Vs in heterostructures to achieve efficient electron trapping and directional transport remains challenging. In this study, oxygen-vacancy-rich 2D/2D g-C 3 N 4 /BiOCl nanosheets were prepared via a simple hydrothermal method and immobilized on a porous β-PVDF matrix through a freeze-assisted phase inversion process, forming a flexible piezo-photocatalytic membrane. The results indicate that the built-in electric field of the g-C 3 N 4 /BiOCl heterojunction and the piezoelectric polarization field of PVDF jointly regulate the electronic behavior near O Vs . These two electric fields overlap around the defect sites and favorably modulate the defect energy levels, thereby enhancing the ability of O Vs to capture electrons. This dual-field regulation deepens the defect potential wells, prolongs electron residence time, and suppresses carrier recombination. The piezoelectric field also provides a directional driving force that guides electron transport along the interface and promotes the generation of reactive oxygen species. Using tetracycline as the target pollutant, the g-C 3 N 4 /BiOCl/PVDF-50 % membrane exhibited the highest piezo–photocatalytic activity, with an apparent rate constant of 0.04012 min −1 . Overall, this study elucidates the synergistic mechanism among the piezoelectric field, the heterojunction electric field, and O Vs , and provides an effective strategy for designing high performance flexible piezo-photocatalytic materials. Oxygen‑vacancy‑rich g‑C 3 N 4 /BiOCl nanosheets embedded in a flexible β‑PVDF membrane construct dual electric fields by combining an S‑scheme built‑in field with piezoelectric polarization under mechanical vibration. This dual‑field superposition deepens defect potential wells, facilitates directional charge separation, and enhances defect‑mediated O 2 activation, thereby enabling efficient piezophotocatalytic degradation of tetracycline in aqueous solution. Download: Download high-res image (148KB) Download: Download full-size image
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高影响因子
MOLECULES
·
2026
·Vol. 31
·期 18
·3229
·
IF 5.1
Xinyi Yang,Yuxin Tang,Fei Qi,Zhihan Xue,Huiying Zhang,Zhaohai Ni,Bo Feng,Ziyang Yue,Guangbo Che
Efficient and reusable photo-Fenton catalysts require the rational integration of photocatalytic platforms, effective H 2 O 2 activation sites, and practical immobilization strategies. Herein, nitrogen-vacancy-rich tubular g-C 3 N 4 (HCNT) was prepared as the photocatalytic platform. Iron (II) phthalocyanine (FePc) was then loaded onto HCNT to form the FePc/HCNT composite for antibiotic degradation. The FePc/HCNT composite was further immobilized in a poly (vinylidene fluoride) (PVDF) membrane, denoted as FePc/HCNT-PVDF, to facilitate catalyst recovery and reuse. Benefiting from the micrometer-scale tubular morphology, the FePc/HCNT remained exposed on the membrane surface, preserving accessible catalytic interfaces and reducing encapsulation within the polymer matrix. The tubular architecture facilitated reactant transport, while surface nitrogen vacancies enhanced photogenerated-carrier separation and utilization. Component-dependent experiments revealed that FePc served as the primary center for H 2 O 2 activation, whereas HCNT functioned as a defect-engineered tubular photocatalytic platform that promoted photogenerated-carrier separation and reactive oxygen species formation. The optimized FePc/HCNT achieved 94% oxytetracycline degradation within 60 min, with an apparent rate constant of 0.04462 min −1 , approximately 11 times higher than bulk g-C 3 N 4 , and exhibited broad-spectrum degradation capability toward various organic pollutants, including rhodamine B, tetracycline, amoxicillin, and ciprofloxacin. The FePc/HCNT-PVDF membrane removed 90% of oxytetracycline within 60 min and maintained stable performance over ten cycles. This work provides insights into the integrated roles of nitrogen vacancy regulation, FePc-mediated H 2 O 2 activation, and morphology-assisted membrane immobilization in the development of reusable g-C 3 N 4 -based photo-Fenton catalysts.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Jin Huang,Yuqi Dong,Yang Li,Renlong Zhou,Shuoqing Yan,Jun He
A hierarchical g-C 3 N 4 /FeCo@CNT composite is fabricated by a three-stage strategy. • CNT shells protect FeCo cores from thermal oxidation and electrochemical corrosion. • At 400 °C, RLmin reaches −22.01 dB with 4.03 GHz EAB, showing thermal resilience. • This work unites broadband absorption, thermal stability, and corrosion resistance. Graphitic carbon nitride (g-C 3 N 4 ) is emerging as a promising microwave absorbing material owing to its chemical/thermal stability and tunable dielectric properties. However, its intrinsic low electrical conductivity and the lack of magnetic loss mechanism present obstacles to practical applications. Herein, a hierarchically structured g-C 3 N 4 /FeCo@CNT composite was fabricated via a three-stage sequential strategy. The hollow tubular g-C 3 N 4 framework serves as a low-density dielectric scaffold and facilitates multiple internal reflections, whereas the FeCo@CNT hybrids establish a conductive network and contribute substantial magnetic loss. Moreover, the CNT shell effectively protects the FeCo cores against thermal oxidation and electrochemical corrosion. Benefiting from the balanced dielectric–magnetic synergy, the composite achieves an effective absorption bandwidth (EAB) of 4.07 GHz at a thickness of only 2.2 mm, with a minimum reflection loss ( RL min ) of −17.86 dB at room temperature. Notably, the RL min further reaches −22.01 dB and the corresponding bandwidth remains 4.03 GHz at 400 °C, underscoring exceptional high-temperature resilience. This research offers new insights into the rational design of g-C₃N₄-based microwave absorbers that simultaneously reconcile broadband microwave absorption with high-temperature stability and corrosion resistance.
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危险品化学品经营许可证（带存储）