INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Yixin Sun,Jiawen Liu,Xinyang Xu,Zhonghua Li
In the strategies of modifying g-C 3 N 4 by changing its electron transport structure, it has been demonstrated that constructing donor-acceptor (D-A) or D-π-A g–C 3 N 4 –based conjugated copolymers can obviously accelerate the separation of charge carriers. Inspired by their advantages, a novel g–C 3 N 4 –based D-A 1 -π-A 2 type polymer was designed and synthesized via the thermal copolymerization of urea and PA-PM (the product of the amidation reaction between PA and PM). As a result, the prepared CN-PA-PM photocatalysts with D-A 1 -π-A 2 structure not only improve visible-light response, but also promote the separation of charge carriers, thereby achieving superior photocatalytic hydrogen evolution activity. The optimized CN-PA-PM-13 polymer has the best hydrogen evolution efficiency of 17.79 mmol g −1 h −1 under visible light (λ > 420 nm), which is 33.7 times that of pure g-C 3 N 4 . This work presents a new design concept for g–C 3 N 4 –based polymer photocatalysts with high optical absorption capability and effective carrier separation ability.
研究领域:
材料科学
·
能源化学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2016
·
IF 3.169
Haihui Shen,Bo Zhang,Huiyan Xu,Yue Sun,Qiwang Wu,Hong Shen,Yingchun Liu
Some natural heterocyclic alkaloids containing planar group show potential to complex with specific promoter region of protooncogene for stabilizing the G-quadruplex (G4) structure which nowadays promises to be a target in anticancer drug design. However, in view of the polymorphic characteristics and structural complexity of heterocyclic alkaloids, it is desirable to develop high-throughput and low-consumption approach for anticancer drug screening. In this paper, an intensive study on alkaloid ligand/G4 DNA interaction has been conducted, demonstrating that the end-stacking interaction is the favorable binding mode between the oncogene-related Pu22 G4 DNA and the heterocyclic alkaloid ligand. Based on structural feasibility and energy minimization, a ligand displacement assay for screening alkaloid ligand in stabilizing the oncogene target G4 has been developed, which also helps to facilitate the assessment of drug specificity. Coupled with microfluidic-based DNAzyme-catalytic chemiluminescence detection, the approach showed the advantages of high sensitivity, high throughput with low sample and reagent consumptions.
研究领域:
药理学
·
分子生物学
·
药物发现
·
癌症研究
✓ 已验证
DOI
PubMed
高影响因子
Functional Materials Letters
·
2021
·
IF 2.17
Dan Yang,Lei Zhao,Xueting Feng,Lili Ma,Hanming Ding
As a potential nonmetal activator of peroxymonosulfate (PMS), g -C 3 N 4 becomes a hot material owing to its superior chemical and physical properties. Nevertheless, pristine g -C 3 N 4 is unsatisfactory for PMS activation because of its limited photo-generated charge separation and low specific surface area. Herein, a porous sulfur-doped g -C 3 N 4 (S-doped g -C 3 N 4 ) has been prepared through a one-step calcination route without a template. The in - situ doping of sulfur element and the formation of porous morphology have been confirmed via various characterization methods. The catalytic activity of porous S-doped g -C 3 N 4 is approximately 6.2-fold higher than that of the pristine g -C 3 N 4 on rhodamine B (RhB) decomposition in aid of the photo-assisted PMS activation. The superior catalytic activity and high stability of the porous S-doped g -C 3 N 4 catalyst in a wide pH range are attributed to its higher specific surface area, enriched active sites, efficient photo-induced charge separation, and increased visible-light utilization. Meantime, a synergistic effect between the PMS activation process and the photocatalytic process is conducive to produce abundant radicals for the RhB degradation. This study offers new insight into further developing highly efficient nonmetal heterogeneous catalysts for wastewater treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
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2025
·
IF 3.4
Aerzigu Xukeer,Jin Li
The ternary nanocomposite ZnO/MnO2/g-C3N4 was synthesized for room-temperature ammonia gas detection. Incorporation of g-C3N4 into the ZnO/MnO2 heterostructure significantly improved the composite’s sensing sensitivity at ambient conditions. g-C3N4 facilitated electron migration across the heterojunction interface, boosting conductivity, and provided abundant adsorption sites for ammonia molecules due to its layered structure. The ZnO/MnO2/g-C3N4 composite material exhibits outstanding ammonia sensing performance, with its detection sensitivity being 2.4 times that of the ZnO/MnO2 system. Notably, this material demonstrates rapid response and recovery characteristics, with recorded times of 7.3 and 1.6 s, respectively, thereby optimizing its functional performance and expanding its range of operational applications. The study found that the optimal doping ratio of ZnO/MnO2/g-C3N4 can effectively enhance the material’s specific surface area and electron mobility, thus improving its ammonia adsorption capacity and optimizing the sensor’s response and recovery characteristics. The synthesis employed a sequential two-step strategy: initial formation of a ZnO/MnO2 heterostructure followed by g-C3N4 integration. This approach effectively mitigated limitations of pure ZnO, including sluggish desorption kinetics and low response magnitude. Density functional theory (DFT) computations were employed to elucidate the atomic-level sensing mechanism, revealing significant charge redistribution at the ZnO/MnO2/g-C3N4 heterojunction interfaces upon ammonia adsorption.
研究领域:
材料科学
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传感器技术
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纳米材料
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表面化学
·
气体传感
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Dawei Lan,Huiwen Zhu,Jianwen Zhang,Chengrui Xie,Fan Wang,Yueying Zheng,Zeyu Guo,Mengxia Xu,Tao Wu
This work provided a green, one-pot route to synthesize mesoporous g-C3N4. A series of characterizations revealed that the mesoporous sample maintained the typical structure of g-C3N4. The findings displayed that this mesoporous material had enlarged porosity and optical properties. The largest SBET of the mesoporous sample (32.65 m2/g) was 4.36 times larger than that of the bulk sample (7.48 m2/g). The photoactivity of the prepared photocatalysts was measured by the photocatalytic removal of rhodamine B (RhB). In agreement with the characterization analysis, the mesoporous g-C3N4 (99.60%) exhibited a 3.88 times better photocatalytic efficiency than that of bulk g-C3N4 (25.63%) and an 11.19 times faster reaction rate in the same period. In addition, the possible mechanism of this photodecomposition reaction was identified by the electron spin resonance (ESR) and trapping tests. The results demonstrated that •O2– and •OH made contributions, and •O2– played a dominant role in this process. This research offers a promising method for the synthesis of mesoporous g-C3N4 in an environmentally friendly and cost-effective route with remarkably high photoactivity.
研究领域:
环境化学
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材料科学
·
光催化
·
纳米材料
·
环境功能材料
·
绿色合成
✓ 已验证
DOI
高影响因子
ANALYST
·
2013
·Vol. 138
·期 9
·2592-2597
·
IF 3.969
Shao-Kai Sun,Bei-Bei Wang,Xiu-Ping Yan
Owing to the biological and clinical significance of deoxyribonuclease I (DNase I), it is highly desirable to develop near-infrared (NIR) fluorescent assays for the determination of DNase I activity. Here we report a label-free NIR fluorescent assay for selective determination of DNase I activity based on malachite green (MG)/G-quadruplexes. In the presence of Na+ or K+, single stranded DNA (ssDNA) is able to form a G-quadruplex structure, thus to increase the rigidity of MG structure and result in a remarkable NIR fluorescence. As DNase I is capable of cleaving all types of DNA indiscriminately to release nucleotide products, the G-quadruplexes are cleaved into oligonucleotides in the presence of DNase I. As a result, the rigidity of MG structure is reduced, and the NIR fluorescence of the solution decreases with increase of DNase I activity, providing a useful platform for low-cost, label-free and convenient detection of DNase I activity. Under the optimum conditions, the proposed label-free NIR fluorescent assay gave a detection limit of 1 u mL−1, and a relative standard deviation of 3.2% for eleven replicate detections of 50 u mL−1 DNase I. The proposed assay was applied to the determination of DNase I activity in spiked human urine samples with recoveries from 99.1 to 109.0%.
研究领域:
生物化学
·
临床检验
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Ruiming Fang,Zhongqing Yang,Zukhra C. Kadirova,Ziqiang He,Ziqi Wang,Jingyu Ran,Li Zhang
The visible-light photocatalytic reduction of CO 2 becomes a vital breakthrough to alleviate the greenhouse effect and achieve carbon neutrality. In this paper, ultrathin g-C 3 N 4 nanosheets of 1.74 nm were constructed, and K + was successfully doped between layers. The yields of CO and CH 4 are 1.65 μmol·g −1 ·h −1 and 0.15 μmol·g −1 ·h −1 , which are 4.70 and 7.27 times higher than the original g-C 3 N 4 , respectively. The ultra-thin nano-lamellar structure shortens the carrier transmission distance, and the intercalation of K + not only promotes the electron transport between g-C 3 N 4 layers but also changes the original hybrid mode of the catalytic system, thus shortening the band gap and adjusting the energy band structure. In addition, the CO 2 adsorption center of the K + intercalated g-C 3 N 4 is transferred from the coordinated carbon atom to the center of the triazine unit, and the binding energy is obviously increased, which strengthens the CO 2 adsorption. Finally, through in-situ DRIFT characterization, it is speculated that the reaction enhancement mechanism is that the modified catalyst promotes the adsorption and activation of CO 2 , resulting in the production of more intermediates, especially more hydrocarbon intermediates, which is more conducive to the photocatalytic reduction of CO 2 .
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Qian Zhang,Qianrui Yang,Tianci Liu,Yuchen Yue,Jingran Zhang,Guifu Zuo
In this work, a novel Faraday cage-type electrochemiluminescence (ECL) biosensor was constructed for the ultrasensitive "turn on" detection of CEA. The capture unit was prepared by immobilizing the Carcinoembryonic antibody Ab 1 onto the functionalized magnetic Fe 3 O 4 nanoparticles, while the detection unit consisted of modified g-C 3 N 4 labeled with antibody Ab 2 . The recognition scaffold was assembled as follows: the capture unit was first fixed onto the magnetic electrode surface; the target CEA was then captured; followed by further hybridized with the detection unit; ultimately forming the Faradaycage biosensor structure. In this configuration, the signal unit became part of the electrode surface, enabling all electrochemiluminophores in the signal unit to participate in the electrode reaction, thereby significantly enhancing the detection sensitivity. Utilizing the proposed Faraday-cage cascade, the ECL intensity increased with the rising CEA concentration. The linear range was from 0.01 to 100 ng/mL, with a detection limit of 0.35 pg/mL. The sensor was validated for its selectivity, stability, reproducibility, precision, and application potential. This Faraday cage-type ECL biosensor shows promising prospects for clinical CEA detection.
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2018
·
IF 0
Xu Huang,Xuezhang Xiao,Xuancheng Wang,Zhendong Yao,Chuntao Wang,Xiulin Fan,Lixin Chen
Li-Mg-B-H system with the composition of 2LiBH 4 -MgH 2 is one of the most promising reversible hydrogen storage materials because of the extremely high hydrogen storage capacity (11.5 wt%). Yet, sluggish kinetics with high desorption temperature (~ 400 °C) hindered its practical applications. Herein, a highly efficient catalyst of nanoNi@g-C 3 N 4 , comprised of transition metal nanocatalyst and carbon-based nonmetal material, was designed and fabricated to dramatically reduce its initial hydrogen desorption temperature to as low as ~105 °C, and eliminate induction period between the two dehydrogenation steps of 2LiBH 4 -MgH 2 by reducing the activation energy for the dehydrogenation of LiBH 4 from 200±6 to 126±7 kJ/mol. Multiple postmortem analyses revealed that the in situ formed MgNi 3 B 2 NPs and the H + defects on g-C 3 N 4 play the key role in synergically enhancing the hydrogen reversible desorption/absorption kinetics at low temperature: 1) in situ formed MgNi 3 B 2 acts as nucleation center of MgB 2 and leads to an excellent catalytic effect to accelerate the dehydrogenation kinetics of 2LiBH 4 -MgH 2 ; 2) the H + defects on g-C 3 N 4 , will interact with the H – in LiBH 4 to trigger the release of H 2 at low temperature and destabilize LiBH 4 and MgH 2 to form Li 3 N and Mg 3 N 2 respectively for the high electronegativity of N: 3) these in situ formed intermediates of Li 3 N and Mg 3 N 2 will be readily rehydrogenated as highly reversible Mg(NH 2 ) 2 and LiH. This novel transition metal and g-C 3 N 4 catalytic composites could provide alternative insights into designing nanosized catalytic hydrogen storage system with low desorption temperature and high capacity for hydrogen-fueled applications.
研究领域:
材料科学
·
能源化学
✓ 已验证
DOI
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Zishuai Hu,Mankun Li,Yidan Pang,Yongmei Liang,Baochen Han,Jian Qi,Fanchun Meng,Yaqiang Li,Guangqian Zhu,Lekbach Yassir,Jianhui Li,Dan Liu
Hydrogel coatings demonstrate potential for protecting against microbiologically influenced corrosion; however, they encounter limitations related to weak mechanical properties and toxicity from chemical crosslinkers. In this study, we prepared a photocatalytic antibacterial hydrogel coating using chitosan and sodium alginate loaded with 2D g-C 3 N 4 , which exhibited robust tensile properties, low swelling rates, and exceptional antibacterial efficacy against Escherichia coli and Staphylococcus aureus. The antibacterial activity is primarily attributed to the adsorption of bacteria by –NH 2 groups and the generation of reactive oxygen species by 2D g-C 3 N 4 . Furthermore, the electron-rich microenvironment created by –NH 2 and –OH groups attract the h + generated during 2D g-C 3 N 4 photocatalysis, thereby enhancing the efficiency of charge carrier separation. Density functional theory calculations further support this conclusion. The incorporation of 2D g-C 3 N 4 nanomaterials alters the hydrogel coating structure, disrupting hydrogen bonding and exposing additional –NH 2 groups that bind with H + to improve active adsorption. This innovative hydrogel coating offers a novel strategy for protecting against microbial corrosion in marine environments.
研究领域:
材料科学
·
微生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2012
·Vol. 22
·期 44
·23428-23438
·
IF 5.968
Liming Sun,Xian Zhao,Chun-Jiang Jia,Yixuan Zhou,Xiufeng Cheng,Pan Li,Li Liu,Weiliu Fan
We present a systematic investigation of the microscopic mechanism of interface interaction, charge transfer and separation, as well as their influence on the photocatalytic activity of heterojunctions by a combination of theoretical calculations and experimental techniques for the g-C3N4–ZnWO4 composite. HRTEM results and DFT calculations mutually validate each other to indicate the reasonable existence of g-C3N4 (001)–ZnWO4 (010) and g-C3N4 (001)–ZnWO4 (011) interfaces. The g-C3N4–ZnWO4 heterojunctions show higher photocatalytic activity for degradation of MB than pure g-C3N4 and ZnWO4 under visible-light irradiation. Moreover, the heterojunctions significantly enhance the oxidation of phenol in contrast to pure g-C3N4, the phenol oxidation capacity of which is weak, clearly demonstrating a synergistic effect between g-C3N4 and ZnWO4. Interestingly, based on the theoretical calculations, we find that electrons in the upper valence band can be directly excited from g-C3N4 to the conduction band, that is, the W 5d orbital of ZnWO4, under visible-light irradiation, which should yield well-separated electron–hole pairs, with high photocatalytic performance in g-C3N4–ZnWO4 heterojunctions as shown by our experiment. The microcosmic mechanisms of interface interaction and charge transfer in this system can be helpful for fabricating other effective hetero-structured photocatalysts.
研究领域:
材料科学
·
环境科学
·
理论化学
✓ 已验证
DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Guobin Li,Zhenbang Han,Tao Wang,Minghui Zhang,Qiaoqiao Liu,Tong Zhang,Xiaoming Zhao
Fe-doped graphitic carbon nitride (g-C 3 N 4 ) represents an attractive photo-Fenton catalyst for organic contaminants removal, but the practical performances still need to be improved for large-scale application. Herein, we developed a high-efficiency photo-Fenton catalyst by anchoring Fe-g-C 3 N 4 onto an amidoxime-functionalized polyacrylonitrile fiber (AP) substrate through a simple hydrothermal approach. Comprehensive characterizations demonstrate the strong catalyst-support interaction via the axial coordination bonding between -OH groups and Fe 3+ , which could induce electric polarization of Fe-g-C 3 N 4 to promote the H 2 O 2 adsorption and activation. The fibrous support could also accelerate the photoelectrons transfer from g-C 3 N 4 to Fe 3+ by strengthening the d-π conjugated large π bond, as well as alleviate the backflow recombination from Fe 3+ to g-C 3 N 4 through the electron sink effect. These synergistic qualities resulted in superior photo-Fenton performance for organic contaminants removal, which delivered 4.0-fold higher degradation kinetics than that of the Fe doped g-C 3 N 4 powder catalyst and exhibited unexpected high activity at strong basic environment (pH = 12). Our work demonstrates an ingenious and simple way to design exceptional photo-Fenton catalysts for environmental remediation.
研究领域:
环境科学
·
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
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