DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Ruixi Li,Jiani He,Huan Fu,Qingqing Liu,Lihua Zhu,Weizhen Wang,Liqing Li,Zhiqing Yang,Huan Zhang,Hengqiang Ye
Graphitic carbon nitride (g-C 3 N 4 ) is prepared by high-temperature annealing method, followed by the deposition of noble metal (Pt, Rh, Pd, Ru) nanoparticles and then variants 0.38 wt%, 0.76 wt%, 2.51 wt%Pd/g-C 3 N 4 catalysts are obtained using NaBH 4 reduction method. Pd/g-C 3 N 4 exhibits excellent catalytic activity in nitroarenes selective hydrogenation under quite moderate reaction conditions (e.g., p-nitroacetophenone hydrogenation, 96.5 % conversion with 100 % selectivity to p-aminoacetophenone and 15.6 min −1 -turnover frequency at 3.0 MPa H 2 , 20 °C, 0.33 h). Additionally, the Pd/g-C 3 N 4 samples are used for 1, 3-dinitrobenzene hydrogenation, 2.51 wt%Pd/g-C 3 N 4 obtains 97.6 % conversion and 100 % selectivity to m-nitroaniline (20 °C, 3.0 MPa H 2 , 1 min). TOF: 2.51 wt%Pd/g-C 3 N 4 -2.02 s −1 > 0.76 wt%Pd/g-C 3 N 4 -0.56 s −1 > 0.38 wt%Pd/g-C 3 N 4 -0.54 s −1 for 1, 3-dinitrobenzene hydrogenation. Characterizations of XRD, XPS, AC-STEM, AC-STEM elemental analysis, TEM, HRTEM, BET and H 2 -TPD, etc. demonstrate that the Pd nanoparticles in Pd/g-C 3 N 4 have high dispersion and surface/interface synergy of Pd-g-C 3 N 4 , probably contributing to the catalyst's enhanced selectivity, activity, and stability in nitroaromatics hydrogenation. In addition, the catalyst is recyclable and highly durable for nitroaromatics hydrogenation.
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VACUUM
·
2025
·
IF 3.9
Yining Zhang,Xiaowen Su,Shan Wu,Xiaoqing Cao,Yu Wan,Longfei Jie,Qiongyan Ma,Jixin Su
Superoxide radicals (•O 2 − ) play a pivotal role in photocatalysis, yet studies on the selective enhancement of •O 2 − pathways to improve the degradation efficiency toward •O 2 − -sensitive pollutants remain scarce. Accordingly, we selected g-C 3 N 4 , which is recognized for generating •O 2 − as the primary reactive species in pollutant degradation, as the host photocatalyst for selectivity design. A g-C 3 N 4 /LDHs/CoPcS ternary photocatalyst with dual type-II heterojunction was synthesized via coprecipitation, calcination, and hydrothermal treatment. The material's properties were characterized by SEM, TEM, XRD, FTIR, XPS, and UV–vis DRS. Under visible light, the optimal g-C 3 N 4 /LDHs/Co-5 composite exhibited a 29.7 % increase in tetracycline degradation efficiency and a 2.25-fold increase in the reaction rate constant compared to pristine g-C 3 N 4 . Additionally, the photocatalytic mechanism was investigated through reactive species capture experiments and ESR analysis, with transient photocurrent responses, EIS measurements, Mott-Schottky analysis, and PL spectra providing complementary evidence. The results indicated that the positive surface charges of the composite accelerated electron transfer to O 2 , thereby speeding its reduction to •O 2 − , promoting selective •O 2 − generation and improving the photocatalytic degradation efficiency. This ternary composite advances g-C 3 N 4 from general photocatalytic use to •O 2 − -selective applications, providing an effective approach for degrading tetracycline and other •O 2 − -sensitive pollutants.
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MICROCHIMICA ACTA
·
2025
·Vol. 193
·期 1
·49
·
IF 5.3
Wang Chuang,Peng Yue,Miao Yuanyuan,Sun Xinyuan,Cheng Wenting,Li Jinlong
DNA methyltransferases (MTases) play a critical role in epigenetic regulation and are closely associated with the occurrence and development of various diseases. To address the limitations of current detection methods, which often suffer from complicated operation and limited sensitivity we have developed a label-free fluorescent biosensing platform based on DNA-templated silver nanoclusters (DNA-AgNCs) for the detection of DNA adenine methyltransferase (Dam MTase) activity and the screening of its inhibitors. In this system, DNA-AgNCs signal probes are synthesized via a simple reduction reaction. Dumbbell-shaped DNA substrates are designed to be specifically methylated by Dam MTase in the presence of S-adenosylmethionine (SAM). The methylated substrates are subsequently recognized and cleaved by DpnI, yielding DNA fragments with 3′-OH termini. These termini are extended by terminal deoxynucleotidyl transferase (TdT) in the presence of dGTP, generating G-rich sequences, which hybridize with the DNA-AgNCs and significantly enhance the fluorescence intensity. This cascade reaction enables the sensitive detection of Dam MTase activity. Compared with the other approaches, the proposed method exhibits a wider linear range (0.5–10 U/mL) and a lower detection limit (0.165 U/mL). Furthermore, inhibition studies demonstrate that 5-fluorouracil and gentamicin effectively suppress Dam MTase activity. The method also shows excellent performance in complex biological samples. Overall, this fluorescence-based strategy offers high sensitivity and excellent specificity, demonstrating broad application prospects in epigenetic research and drug discovery. Graphical
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高影响因子
MICROCHEMICAL JOURNAL
·
2019
·
IF 3.206
Junling Duan,Li Zhao,Wei Lv,YiJing Li,Yuanhong Zhang,Shiyun Ai,Lusheng Zhu
The g-C 3 N 4 /Fe 3 O 4 nanocomposites with good fluorescence and magnetic property were designed and prepared for simultaneous detection and separation of trace Cr(VI) in water. The g-C 3 N 4 /Fe 3 O 4 nanocomposites based fluorescent sensor for Cr(VI) showed high sensitivity and selectivity. The linear response range of Cr(VI) was found to be 0 to 600 μM with a detection limit of 0.5 μM. In addition, the g-C 3 N 4 /Fe 3 O 4 as a novel adsorbent had effective removal towards Cr(VI). The adsorption capacity could reach 59.2 mg/ g. Furthermore, the g-C 3 N 4 /Fe 3 O 4 nanocomposites displayed superparamagnetic properties, allowing them to be easily separated from the liquid phase via an external magnetic field .
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Yanxian Geng,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
Heterojunctions have attracted considerable attention for efficiently utilizing solar energy and improving conversion efficiency during pollutant degradation. Herein, carbon nitride and hematite (α-Fe 2 O 3 ) are used to prepare a Z-scheme 2D/2D α-Fe 2 O 3 /g-C 3 N 4 heterojunction using an impregnation-hydrothermal method. The unique 2D/2D structure has a high interfacial area and widely-dispersed active sites. The energy band structure of the Z-scheme heterojunction leads to broad visible-light absorption and promotes charge transfer. Optimizing the content of the α-Fe 2 O 3 precursor in composite leads to a maximum efficiency of 60.8% for the removal of 600 ppb of NO , which is approximately 1.78 times that of g-C 3 N 4 (34.2%). The photocatalytic performance is greatly promoted because of the formation of the heterojunction and the strong interfacial action between g-C 3 N 4 nanosheets and α-Fe 2 O 3 nanoplates. Cycling experiments verify that the α-Fe 2 O 3 /g-C 3 N 4 heterojunction has good stability and reusability. The α-Fe 2 O 3 /g-C 3 N 4 heterojunction therefore has great potential in sustainable and efficient pollutant degradation.
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SOLID STATE SCIENCES
·
2020
·
IF 2.434
Muyan Zhou,Yong Wu,Lingyi Shi,Shiyu Hu,Huanhuan Li,Yinyan Gong,Lengyuan Niu,Xinjuan Liu,Can Li
The large work function difference between two semiconductors will effectively adjust the interfacial electronic distribution and catalytic performances of heterojunction . In this work, a novel t -ZrO 2 /g-C 3 N 4 composite photocatalyst was prepared by integrating t -ZrO 2 nanoparticle with graphitic carbon nitride (g-C 3 N 4 ) film considering the large work function of tetragonal ZrO 2 ( t -ZrO 2 ). With the aid of experimental measurements and density functional theory calculations, the electronic distributions of g-C 3 N 4 film were explicitly adjusted by the supporting t -ZrO 2 nanoparticle on account of the large interfacial internal electric field , which leaded to the improvement of photogenerated carriers mobility and lifetime, the enhancement of reduction ability and the increase of oxidation active sites. Results showed that the photocatalytic activity of the composite sample was increased by 9.4 and 2.9 times compared with g-C 3 N 4 sample for Rhodamine B and tetracycline hydrochloride degradation under visible-light. This modification strategy shall be applied to devise other high-efficient catalysts by selecting semiconductor with suitable work function.
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APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Ya-Nan Li,Zhao-Yang Chen,Min-Qiang Wang,Long-zhen Zhang,Shu-Juan Bao
A porous g-C 3 N 4 /TiO 2 with hierarchical heterostructure has been successfully fabricated through a in situ assembling of small needle-like TiO 2 on the surface of ultrathin g-C 3 N 4 sheets. The ultrathin g-C 3 N 4 sheets with carbon vacancies and rich hydroxyl groups were found to facilitate the nucleation and in situ growth of TiO 2 and also to modulate the surface chemical activity of the g-C 3 N 4 /TiO 2 hierarchical heterostructure. The as-designed photocatalytic heterojunction degraded Acid Orange with 82% efficiency after 10 min under simulated solar light, and possessed excellent cycle stability. Relative physical characterizations and photochemical experiments reveal that engineering the interface/surface of g-C 3 N 4 plays a vital role in effectively constructing heterostructures of g-C 3 N 4 /TiO 2 , thus realizing efficient photoinduced electron-hole separation during photocatalytic process.
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高影响因子
AICHE JOURNAL
·
2019
·Vol. 65
·期 10
·e16699
·
IF 3.463
Lingfei Liu,Yisa Zhou,Jian Xue,Haihui Wang
Graphene oxide (GO) membranes have shown great potential for water purification, but their permeability and antipressure ability are poor, which limits their practical applications. In this study, two-dimensional graphitic carbon nitride (g-C 3 N 4 ) nanosheet-intercalated GO (GOCN) membranes were developed to improve the separation performance of GO membranes, especially under high operating pressure. After incorporation of the g-C 3 N 4 nanosheets, the amount of permeable nanochannels (wrinkles or corrugation) in the membrane increased; hence, the water permeance was effectively improved (twice as high as that of GO membranes). Moreover, the antipressure performance of the GOCN membranes was significantly enhanced (even below 0.5 MPa pressure) as the nanochannels in the composite membranes become stable and rigid due to the support of the pressure-resistant g-C 3 N 4 nanosheets. The good separation performance demonstrates that the intercalation of g-C 3 N 4 is an effective strategy to improve the GO-based membrane properties, which can promote their application in water purification.
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BMC Chemistry
·
2025
·Vol. 19
·期 1
·1-15
·
IF 4.6
Lei Ying,Bao Qijing,Lin Feng,Zhang Jian,Zhang Yanji,Wu Yuechao,Lv Liang,Ding Liyong
Graphite carbon nitride (g-C 3 N 4 ) has emerged as a promising photocatalyst for visible-light-driven applications due to its suitable band structure. However, the rapid recombination of photogenerated electron-hole pairs in bulk g-C 3 N 4 significantly hinders its photocatalytic efficiency. In this study, we report the fabrication of a ternary g-C 3 N 4 /MoS 2 /rGO (CMG) nanocomposite via in situ photoreduction-induced exfoliation. The introduction of MoS 2 and rGO not only facilitates the exfoliation of g-C 3 N 4 into ultrathin nanosheet, thereby exposing more active sites, but also enables the formation of tightly coupled heterojunctions that promote charge separation and transfer. Photoluminescence (PL) analyses confirm the suppressed recombination of charge carriers, indicative of enhanced charge dynamics within the heterojunction between MoS 2 , rGO and g-C 3 N 4 . Among the synthesized materials, the optimized CMG-175 composite exhibits remarkable photocatalytic activity, achieving a 95.7% degradation rate of Rhodamine B (RhB) within 30 min under visible light irradiation, which is 23.6-fold enhancement compared to pristine g-C 3 N 4 . Mechanistic studies reveal that photogenerated holes and superoxide radicals are the predominant reactive species driving the degradation process. This work highlights a rational design strategy for constructing high-performance g-C 3 N 4 -based heterojunction photocatalysts and provides valuable insight into the synergistic interactions among MoS 2 , rGO, and g-C 3 N 4 for efficient organic pollutant removal.
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高影响因子
JOURNAL OF RARE EARTHS
·
2026
·
IF 9.6
Yujie Liang,Ruoshan Lei,Yun He,Shilong Zhao,Feifei Huang,Lei Lei
To develop novel luminescent materials with optical thermometry and anti-counterfeiting functionalities, this work designed, prepared, and characterized a series of Sc 2 Mo 3 O 12 : Eu 3+ (SMOE) phosphors and SMOE/g-C 3 N 4 composites. Structural and optical analyses reveal that SMOE exhibits two-dimensional negative thermal expansion (NTE) behavior and high resistance to luminescence concentration quenching. Via vapor deposition, g-C 3 N 4 was deposited onto SMOE particles, slightly enhancing their NTE performance. Upon UV excitation, SMOE/g-C 3 N 4 shows dual-emission characteristics featuring blue luminescence from g-C 3 N 4 and red-orange emissions from Eu 3+ , with different dependencies on excitation wavelength. Additionally, the g-C 3 N 4 emission band undergoes spectral narrowing and fast thermal quenching with increasing temperature, in contrast to the relatively stable Eu 3+ emissions. These divergent thermal responses enable five independent thermometric parameters (luminescence intensity ratios, spectral bandwidth, and individual emission intensities) to exhibit linear temperature dependence. A multi-parameter sensing strategy based on a multiple linear regression model yields a maximal relative sensitivity of an exceptional 30%/K, surpassing single-parameter approaches and outperforming most previously reported optical thermometers. Moreover, SMOE/g-C 3 N 4 is proved to be highly suitable for anti-counterfeiting labels, as its luminescence color can be switched by controlling the excitation conditions. Overall, SMOE/g-C 3 N 4 is a highly promising dual-functional material coupled with excellent thermal sensing and anti-counterfeiting capabilities.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2026
·
IF 3.1
Yu Wang,Wenxiong Chen,Meng Pan,Weijie Liang,Jiahao Lu,Rui Feng,Yang Zhang
Polypropylene (PP) is extensively implemented in electronic equipment and power systems owing to its superior performance, such as high breakdown strength ( E b ), low dielectric loss (tan δ ), and outstanding self-healing capability. However, its low dielectric constant ( ε r ) and restricted energy density ( U e ) obstruct the miniaturization and integration of dielectric capacitors. To address these limitations, PP/PMMA/PP-g-MAH dielectric blend films were prepared via the melt blending and hot-pressing process. The transesterification reaction between the pendant anhydride groups of PP-g-MAH and the ester groups of PMMA forms ester bonds, which reduces the interfacial free energy and, in turn, significantly improves the compatibility between PP and PMMA. The blend film containing 4 wt% PP-g-MAH exhibits a high U e of 7.53 J/cm 3 at 502 MV/m, with an excellent charge–discharge efficiency ( η ) of 97.8%. This work presents a feasible strategy for developing all-organic polypropylene-based dielectric film with superior energy storage performance.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2026
·
IF 8.3
Baker Rhimi,Attiq Ur Rehman,Yuanzhi Hu,Sherif A. El-Khodary,Zhehao Liu,Min Zhou,Karim Harrath,Qiang Ma,Long Zhao,Zhifeng Jiang,Weidong Shi
The development of efficient and stable photocatalysts for hydrogen evolution is crucial for solar-to-fuel conversion. Here, we report Cu-porphyrin (CuTCPP)/oxygen-doped g-C 3 N 4 (O–CN) nanohybrids as high-performance sonophotocatalysts, where strong π–π stacking interactions create robust heterojunctions that promote efficient charge separation and transfer. The optimal 2 % CuTCPP/O–CN2 sample exhibited a 3.3-fold enhancement in H 2 evolution compared to O–CN2 under simulated light coupled with ultrasonication. Experimental results combined with density functional theory (DFT) calculations confirmed the suppression of charge recombination and highlighted the synergistic contribution of ultrasonic excitation with light irradiation. Furthermore, oxygen doping was found to not only reinforce the CuTCPP/O–CN interface but also provides robust anchoring sites for Pt cocatalysts, preventing leaching and aggregation while electronically modulating Pt to optimize its d-band center and H 2 adsorption free energy. These findings provide valuable insights into the rational design of stable and high-active hybrid photocatalysts for solar fuel generation.
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