Frontiers in Environmental Science
·
2026
·
IF 4.4
Meiling Zhu,Yuejie Wang,Ruirui Li,Feng Liang
Graphitic-carbon-coated metallic-catalyst-loaded porous carrier composites are widely used to degrade antibiotics by activating peroxymonosulfate (PMS). Integration of the defect sites within the graphitic shell, core–shell interface, and catalyst/carrier could enhance the “1 + 1 > 2” catalytic effect. In this work, graphitic-carbon-coated cobaltosic oxide (Co3O4@G) having a tailored nanostructure (23.3–29.7 nm for the core and 2.35–1.29 nm for the shell) was first synthesized by pulsed laser ablation. Then, porous Co3O4@G/biochars (Co3O4@G/Bs; 18.5–134.8 m2/g) were synthesized by crosslinking nitrogen-modified Co3O4@G with waste bamboo-pyrolyzed biochars. The degradation behaviors were evaluated as functions of the composite species, catalyst dosage, PMS concentration, tetracycline concentration, solution pH, and coexisting anions. The Co3O4@G/Bs presented high catalytic k values (0.159–0.449 min–1) that were 15.5–40.8 times higher than those of the individual biochars; furthermore, excellent recycling performance (92.5% remaining k value) and promising stability (8.31–2.77 μg/L of Co leakage) were observed after recycling 10 times. The favorable catalytic versatility of the Co3O4@G/Bs was verified by the efficient degradations of levofloxacin (88.6%), oxytetracycline (95.4%), and norfloxacin (92.5%). The degradation mechanism was governed by the radical-based degradation pathways involving •OH, SO4•–, and 1O2 via Co3+ and Co2+ recycling. The present study is expected to provide a valuable reference for degrading antibiotics by integrating tailored laser-ablated core/shell nanoparticles with biochars.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2020
·
IF 4.019
Huihui Zhu,Xiaoju Yang,Min Zhang,Qiuye Li,Jianjun Yang
Constructing two-dimensional (2D) heterostructure is an effective method to obtain highly efficient photocatalysts. In this work, 2D/2D TiO 2 /g-C 3 N 4 heterostructures were constructed via in-situ growth of TiO 2 nanosheets on the surface of g-C 3 N 4 nanosheets by a facile hydrothermal co-assembly technique. The increased dispersion is favorable to expose more vacancies, which is beneficial to the enhancement of visible light absorption. This unique 2D/2D heterostructure exhibits ultrathin thickness and larger interfacial contact area, which results in shorter migration distance of photo-generated carriers to the surface and faster participation in photocatalytic water splitting. As expected, the optimized TiO 2 /g-C 3 N 4 nanocomposites showed a higher photocatalytic hydrogen evolution performance under visible light irradiation than that of pristine g-C 3 N 4 and TiO 2 nanosheets. The improved performance can be attributed to the ultrathin nanosheet structure, the intimate interfacial contact and the presence of surface oxygen vacancies. More appealingly, this environment-friendly 2D/2D TiO 2 /g-C 3 N 4 nanohybrid would attract more attention in water splitting.
研究领域:
材料科学
·
光催化
·
纳米材料
·
能量转换
·
环境技术
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高影响因子
NANO
·
2022
·
IF 1.438
Wenquan Hu,Jia Song,Ming Wang
Sn 3 O 4 /g-C 3 N 4 heterostructure nanomaterials were prepared by calcining melamine and the hydrothermal method. The microstructure and morphology of the synthesized specimen were characterized by X-ray diffraction (XRD), electron microscope (SEM and TEM) and nitrogen adsorption and desorption (BET). The photocatalytic activity was evaluated by the photodegradation of methylene blue (MB) under visible light irradiation and the electrochemical performance was tested under a typical three-electrode configuration. The results show that the Sn 3 O 4 /g-C 3 N 4 heterojunctions exhibit more superior photocatalytic performance for degrading MB compared with single Sn 3 O 4 and g-C 3 N 4 . The degradation rate of MB reaches up to a maximal 90.30% within 75 min, which is far higher than that of Sn 3 O 4 (61.30%). It is attributed to the effective interfacial contact between Sn 3 O 4 and g-C 3 N 4 , which increases charge transfer and prolongs electron-hole separation time. The specific capacitance of Sn 3 O 4 /g-C 3 N 4 is 28.6% higher than that of Sn 3 O 4 due to the formation of a heterostructure.
研究领域:
材料科学
·
纳米技术
·
光催化
·
电化学
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高影响因子
Frontiers of Environmental Science & Engineering
·
2019
·Vol. 13
·期 6
·1-11
·
IF 3.883
Guo Xiaoyan,Li Chunyu,Li Chenghao,Wei Tingting,Tong Lin,Shao Huaiqi,Zhou Qixing,Wang Lan,Liao Yuan
Although carbon nanomaterials have been widely used as effective nanofillers for fabrication of mixed matrix membranes (MMMs) with outstanding performances, the reproducibility of the fabricated MMMs is still hindered by the non-homogenous dispersion of these carbon nanofillers in membrane substrate. Herein, we report an effective way to improve the compatibility of carbon-based nanomaterials with membrane matrixes. By chemically conjugating the oxidized CNTs (o-CNTs) and GO using hexanediamine as cross-linker, a novel carbon nanohybrid material (G-CNTs) was synthesized, which inherited both the advanced properties of multi-walled carbon nanotubes (CNTs) and graphene oxide (GO). The G-CNTs incorporated polyvinylidene fluoride (PVDF) MMMs (GCNTs/PVDF) were fabricated via a non-solvent induced phase separation (NIPS) method. The filtration and antifouling performances of G-CNTs/PVDF were evaluated using distillate water and a 1 g/L bovine serum albumin (BSA) aqueous solution under 0.10 MPa. Compared to the MMMs prepared with o-CNTs, GO, the physical mixture of o-CNTs and GO and pure PVDF membrane, the G-CNTs/PVDF membrane exhibited the highest water flux up to 220 L/m 2 /h and a flux recovery ratio as high as 90%, as well as the best BSA rejection rate. The excellent performances should be attributed to the increased membrane pore size, porosity and hydrophilicity of the resulted membrane. The successful synthesis of the novel nanohybrid G-CNTs provides a new type of nanofillers for MMMs fabrication.
研究领域:
材料科学
·
膜技术
·
高分子材料
·
环境工程
·
纳米复合材料
·
分离科学
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高影响因子
Analytical Methods
·
2026
·
IF 3
Ya Zou,Zhouhong Tan,Jiaqian Li,Anzhong Peng,Jieli He
Clozapine (CLZ), as an efficient atypical antipsychotic drug, faces significant challenges in clinical application, such as a narrow treatment window and huge pharmacokinetic differences between individuals. Therefore, developing sensitive and reliable detection methods for CLZ is crucial for ensuring therapeutic efficacy and reducing medication risks. Strongly blue-fluorescent g-C3N4 nanosheets (g-C3N4Ns) were successfully prepared from bulk g-C3N4 through a two-step process involving protonation and subsequent ultrasonic exfoliation. Leveraging the charge-transfer-induced dynamic quenching of their fluorescence by CLZ, we developed a sensitive analytical method using these nanosheets as a fluorescent probe. The experimental results indicate that this method exhibited a wide linear range (0.02–500 µM) and a low detection limit of 3 nM. When applied to the analysis of bovine serum and clozapine tablets, the spiked recovery rate of CLZ was within the range of 92.0–104.7%, with a relative standard deviation (RSD) of less than 5%, and the results were satisfactory. Moreover, the probe demonstrated excellent selectivity and anti-interference capability against multiple potential interferents. In summary, the g-C3N4Ns fluorescence sensing platform developed herein integrates rapid response, high sensitivity, and excellent reliability and has been successfully applied to CLZ detection in complex matrices. This work establishes a solid foundation for future applications in real human plasma samples and ultimately serves therapeutic drug monitoring (TDM).
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DOI
PubMed
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Weitao He,Chun Miao,Wei Jiang,Li Yan,Chunbo Liu,Keyu Cui
Photocatalysis, which represents a clean and efficient energy conversion technology, shows great potential for addressing both environmental pollution and the energy crisis. Within this context, photocatalytic CO 2 reduction and pollutant degradation represent important research directions. In this study, CdIn 2 S 4 /g-C 3 N 4 (g-C 3 N 4 , graphitic carbon nitride) composites were hydrothermally synthesized and assessed for their photocatalytic performance in the reduction of CO 2 and the degradation of methyl orange and tetracycline as model pollutants. Among the synthesized composites, the optimal photocatalytic activity was achieved by the CdIn 2 S 4 /g-C 3 N 4 (80) composite, with the degradation efficiency for methyl orange reaching 97.21% over 100 min and the reduction efficiency for CO 2 reaching 74.34 μmol g −1 over 4 h. The obtained results demonstrated that the heterojunction formed between CdIn 2 S 4 and g-C 3 N 4 effectively promoted the separation of photogenerated charge carriers while effectively suppressing their recombination, thereby improving the photocatalytic performance. Moreover, a cyclic stability experiment demonstrated that the CdIn 2 S 4 /g-C 3 N 4 composite exhibited excellent recyclability, which is important for its practical application. This work therefore provides a promising strategy for the design of highly efficient and stable photocatalysts toward sustainable environmental remediation and energy conversion.
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Materials
·
2026
·Vol. 19
·期 17
·3673
·
IF 3.7
Caimei Ma,Jiangbing Li,Xinlu Fan,Qingyang Yu
Aiming at the problem that the selectivity of heterogeneous catalysts is difficult to be controlled and the active components are easy to be lost in the acetylene double carbonylation reaction, this paper constructs a highly efficient Pd-based catalyst through the combination of carrier morphology engineering and surface basicity regulation. Using melamine/urea as a precursor, tubular carbon nitride (TCN) was constructed by hydrothermal calcination, and then Pd/TCN-series catalysts were prepared by ultrasonic-assisted impregnation loading 5 wt% Pd and heat treatment in a N2atmosphere. At the same time, bulk g-C3N4(BCN) and activated carbon (AC), TiO2, and ZSM-5 supported systems were used as controls. The characterization results show that compared to BCN, TCN-500 (calcined at 500 °C) has a higher specific surface area (40.19 m2/g vs. 12.47 m2/g) and pore volume (0.1850 cm3/g vs. 0.0792 cm3/g), which provides abundant anchoring sites and efficient mass-transfer channels for Pd nanoparticles. After the introduction of Pd, the total base amount of the catalyst increased significantly from 0.4866 to 1.7172 mmol/g, and the strong Lewis-base center was significantly enhanced. TEM/XRD confirmed that Pd was uniformly dispersed on TCN-500 and mainly exposed the (111) crystal plane. XPS further revealed that there was a stronger electron-coupling effect between Pd and the support. Under the reaction conditions of 70 °C and 5 h, the selectivity of Pd/TCN-500 to dimethyl butenedioate was up to 83.7% (acetylene conversion was 59.6%), which was significantly better than that of the contrast carrier system. The cycle test showed that the selectivity and conversion of the catalyst were reduced to 54.4% and 41.1%, respectively, on the third use. The performance degradation was mainly attributed to the oxidative damage of the TCN nanotube skeleton and the passivation of the surface active defect sites. In this study, the synergistic effect of tubular morphology and surface Lewis basicity effectively stabilized the Pd active center and regulated the product selectivity, which provided a new idea for the development of efficient heterogeneous catalysts for acetylene double carbonylation in non-petroleum routes.
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PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Zipeng Zou,Fangyuan Wang,Siyu Yang,Lu Wu,Yanhong Tu,Jiahao Dai,Jiping Su,Hongpeng Huang,Xiaohui Luo,Jianping Qiu,Yi Mao
To address the escalating antibiotic contamination in aquatic environments, this study developed Ti 3+ self-doped TiO 2 nanotube arrays/g-C 3 N 4 heterojunction photoanodes (TiO 2-x NTAs/g-C 3 N 4 ) via an integrated in situ synthesis strategy combining electrochemical oxidation, reduction, and chemical vapor deposition. Comprehensive characterization verified g-C 3 N 4 being uniformed dispersed on TiO 2 nanotube surfaces, with Ti 3+ doping significantly improving charge carrier separation efficiency. The photoelectrocatalytic system, utilizing the composite material and platinum as the photoanode and the cathode, respectively, achieved outstanding performance in the degradation of enrofloxacin (ENR). Compared with photocatalytic (72.4%) and electrocatalytic (10.4%) process within 120 min, photoelectrocatalytic process demonstrated the strongest degradation activity (85.4%) with significant synergy. The prepared TiO 2-x NTAs/g-C 3 N 4 photoanode showed robust stability, maintaining nearly unchanged ENR degradation efficiency over 10 cycles. Radical quenching experiments and electron paramagnetic resonance analysis identified the photogenerated holes (h⁺) and superoxide radicals ( • O 2 ⁻) as the dominant reactive species. The synergistic interplay between Ti 3+ doping and heterojunction engineering enabled dual optimization of photon utilization and interfacial charge dynamics. Density functional theory calculations coupled with product analysis elucidated three primary degradation pathways: piperazine ring cleavage, quinolone group oxidation, and defluorination. This work provides mechanistic insights into antibiotic degradation and advances material paradigms for photoelectrocatalytic water remediation.
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Journal of Materials Chemistry B
·
2015
·Vol. 3
·期 17
·3420-3424
·
IF 4.726
Yuangang Liu,Zongxiang Chen,Shibin Wang,Ruimin Long,Jingqian Fan,Aizheng Chen,Wenguo Wu
In order to improve alginate microbead stability and further broaden the application of alginate in biomaterials, a new biomaterial, ALG-g-Lys, was prepared and its possibility as a novel drug carrier investigated. The carrier exhibited a sustained release property and preserved activity with no initial burst release, and interestingly, GP-crosslinked ALG-g-Lys microspheres showed obvious fluorescence properties, which showed promising potential for the future drug delivery systems.
研究领域:
生物材料
·
药物递送系统
·
药剂学
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DOI
PubMed
高影响因子
Reaction Kinetics Mechanisms and Catalysis
·
2019
·Vol. 128
·期 1
·109-120
·
IF 1.428
Wu Jiequn,Hua Weiming,Yue Yinghong,Gao Zi
Graphitic carbon nitride (g-C 3 N 4 ) modified Co 3 O 4 was prepared by impregnation and pyrolysis. The obtained g-C 3 N 4 /Co 3 O 4 was thoroughly characterized by XRD, SEM, TEM, FTIR, TG and N 2 adsorption. Its catalytic performance was investigated in the aerobic oxidation of benzyl alcohol in liquid phase. High activity as well as excellent selectivity to benzaldehyde can be obtained at mild condition (at atmospheric pressure and temperature of 80 °C). H 2 -TPR and XPS results show that the excellent activity over modified Co 3 O 4 comes from the cooperative action of g-C 3 N 4 and Co 3 O 4 components. g-C 3 N 4 /Co 3 O 4 can also be used as an efficient catalyst for the aerobic oxidation of various aromatic alcohols. However, it is not active for the aerobic oxidation of aliphatic alcohols.
研究领域:
催化化学
·
材料化学
·
有机化学
·
绿色化学
·
能源化学
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高影响因子
RSC Advances
·
2015
·Vol. 5
·期 69
·56239-56243
·
IF 3.84
Kaixing Zhu,Wenjun Wang,Alan Meng,Meng Zhao,Junhu Wang,Mei Zhao,Dongliang Zhang,Yuping Jia,Chunhua Xu,Zhenjiang Li
g-C3N4 with a layered structure has been proven as an outstanding metal-free organic photocatalyst because of its appropriate bandgap, abundant building elements, and excellent chemical stability. Here, a simple one-step ball milling method is presented for synthesis of mechanically exfoliated g-C3N4 (MECN) thin nanosheets at large scales for the first time. Characterization results showed that gradual size reduction, accompanied by a continual bandgap absorption shift, occurred with increasing grinding time. The obtained MECN thin nanosheets showed significantly enhanced simulated sun light driven photocatalytic activity toward organic degradation compared to their bulk counterpart, highlighting the crucial role of morphology and surface area on the photocatalytic performance.
研究领域:
材料科学
·
光催化
·
纳米材料
·
环境工程
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高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2023
·
IF 1.2
Jiye FU,Tiantian TU,Tian WEN,Qiongdan ZHANG,Chao HUANG,Zuhong LU,Jing TU
MicroRNAs (miRNAs) are crucial for various basic cellular processes and have been regarded as an important indicator for pathogenesis and development of cancer. While miRNAs are characterized by short sequence length, large single cell copy number variation, low abundance in vivo, and high homologous sequence similarity. The development of miRNA detection methods with high sensitivity, good selectivity and low cost is the key to study the function of miRNA. In this article, a method combining isothermal chain replacement amplification and G-quadruplex (G4) specific detection is developed for highly specific and sensitive detection of miRNA. By designing proper DNA sequences, a three-stranded DNA complex was formed and produced a lot of G4 structure sequences, which can be stained by specific fluorescence dye and quantified. In the experiment, the fluorescence dye shows extremely high specificity, which brings excellent signal discrimination, so that the target miRNAs can be accurately detected. Experiments under high background noise also verified this method is highly selective for target miRNAs. This method holds great imagination in expanding the detection methods to more platforms, such as nanopore sensors, because it alters the secondary structure of DNA sequences.
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