JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Jian Zhang,Yuanchun Li,Congze Liu,Chuntao Zhu,Chen shao,Yue Zhao
Semiconductor photo-electrocatalytic technology is considered as an efficient and environmentally friendly wastewater treatment and energy production technology. TiO 2 NTs is widely used in the field of photoelectricity catalysis because of its chemical stability and good recycling. In this paper, g-C 3 N 4 and Ag nanoparticles were deposited on the surface of TiO 2 NTs by solid-phase sublimation and electrodeposition method to prepare Ag/g-C 3 N 4 /TiO 2 NTs composite photo-electrocatalytic materials. The Ag/g-C 3 N 4 /TiO 2 NTs composites showed significant photo-electrocatalytic activity compared with the single component materials. The mechanism of enhanced catalytic activity is that the tight interface formed between Ag, g-C 3 N 4 and TiO 2 NTs, facilitating the photoinduced electron migration from g-C 3 N 4 to TiO 2 NTs and inhibiting the recombination of carrier pairs under the cooperative mechanism of photoelectric catalysis. The results of five cycle experiments show that Ag/g-C 3 N 4 /TiO 2 NTs has good stability. LC-MS and ECOSAR analysis results indicate that Ag/g-C 3 N 4 /TiO 2 NTs photo-electrocatalytic system can be safely used for wastewater degradation treatment.
研究领域:
环境科学
·
材料科学
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.3
Jiaou Qi,Xuli Zhou,Ping Chen,Weixiong Huang,Yanglai Hou,Lilin Lu
Modulating electronic structure to improve photocarriers (photo-generated electrons and holes) separation and suppress photocarriers recombination is crucial for developing highly-active g-C 3 N 4 photocatalyst to degrade tetracycline for alleviating environmental pollution. In this work, a highly disordered g-C 3 N 4 catalyst with abundant carbon defects has been developed via optimization of the precursor composition. The g-C 3 N 4 -M 1 C 2 , prepared by pyrolysis of mixed melamine/cyanuric acid precursors with the molar ratios of 1:2, possesses more sensitive photocurrent response, lower recombination of photocarriers and more negative potential of conduction band as compared to other g-C 3 N 4 catalysts. These enhance the photocarrier-production efficiency and promote the formation of superoxide radicals, thus boosting the photocatalytic tetracycline degradation performance. During a 90-min tetracycline degradation reaction catalyzed by g-C 3 N 4 -M 1 C 2 , the degradation ratio reaches about 87.0 %, demonstrating a substantial improvement in photocatalytic performance as compared to other investigated g-C 3 N 4 catalysts (g-C 3 N 4 -M, g-C 3 N 4 -C and g-C 3 N 4 -M 2 C 1 , which are prepared by pyrolysis of melamine, cyanuric acid and mixed melamine/cyanuric acid precursors with the molar ratios of 2:1, respectively). This work opens up new opportunity of developing high-performance g-C 3 N 4 catalysts by modulating electronic structure through optimization of precursor composition.
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高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·Vol. 46
·期 66
·33186-33196
·
IF 5.816
Xinjun Li,Yaokun Fu,Yichao Xie,Lian Cong,Han Yu,Lu Zhang,Yuan Li,Shumin Han
Additive doping is one of the effective methods to overcome the shortcomings of MgH 2 on the aspect of relatively high operating temperatures and slow desorption kinetics. In this paper, hollow g-C 3 N 4 (TCN) tubes with a diameter of 2 μm are synthesized through the hydrothermal and high-temperature pyrolysis methods, and then nickel is chemically reduced onto TCN to form Ni/TCN composite at 278 K. Ni/TCN is then introduced into the MgH 2 /Mg system by means of hydriding combustion and ball milling. The MgH 2 –Ni/TCN composite starts to release hydrogen at 535 K, which is 116 K lower than the as-milled MgH 2 (651 K). The MgH 2 –Ni/TCN composite absorbs 5.24 wt% H 2 within 3500 s at 423 K, and takes up 3.56 wt% H 2 within 3500 s, even at a temperature as low as 373 K. The apparent activation energy ( E a ) of the MgH 2 decreases from 161.1 to 82.6 kJ/mol by the addition of Ni/TCN. Moreover, the MgH 2 –Ni/TCN sample shows excellent cycle stability, with a dehydrogenation capacity retention rate of 98.0% after 10 cycles. The carbon material enhances sorption kinetics by dispersing and stabilizating MgH 2 . Otherwise, the phase transformation between Mg 2 NiH 4 and Mg 2 NiH 0.3 accelerates the re/dehydrogenation reaction of the composite.
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Science of Advanced Materials
·
2014
·Vol. 6
·期 6
·1091-1098
·
IF 2.908
Chen Lu-Ya,Zhang Wei-De
Composite photocatalysts based on graphite-like carbon nitride (g-C3N4) and SnO2 nanoparticles were prepared by heating a mixture of SnO2 nanoparticles and melamine in a muffle furnace. The as-synthesized samples were characterized by X-ray
diffraction, scanning electron microscopy, transmission electron microscopy, ultraviolet-visible light absorbance spectra, FT-IR and TG analyses. The kinetic constant over an optimized nanocomposite catalyst was 1.37 h–1, which was 4.54 times higher than that over the pristine
g-C3N4 towards the decomposition of rhodamine B under visible light. The significantly higher photocatalytic activity of the composite photocatalysts was attributed to the enhancement of electron–hole separation at the interface between g-C3N4
and SnO2.
研究领域:
材料科学
·
光催化
·
纳米技术
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2022
·
IF 14.224
Tianqi Tan,Xuemei Wang,Xi Zhou,Hao Ma,Ruimei Fang,Qin Geng,Fan Dong
In this study, a novel lead-free perovskite heterojunction Cs 2 SnCl 6 /C 3 N 4 composite was constructed and applied for photocatalytic NO purification. After design optimization, the Cs 2 SnCl 6 /C 3 N 4 heterojunction exhibit excellent and stable photocatalytic NO purification ability under visible-light irradiation, which is significantly better than pristine Cs 2 SnCl 6 and C 3 N 4 . Combined in-situ DRIFTS and electron spin resonance spin-trapping, the mechanism of Cs 2 SnCl 6 /C 3 N 4 photocatalytic NO removal was revealed. Under visible-light irradiation, the photo-generated electrons on the conduction band of C 3 N 4 would spontaneously migrate to the CB of Cs 2 SnCl 6 , leaving holes (h + ) on the valence band of C 3 N 4 , contributing to efficiently segregated charge carriers and improved photocatalytic NO purification. Density functional theory calculations also revealed the directional electron transfer at the C 3 N 4 and Cs 2 SnCl 6 interface, in which the charge was migrated from C 3 N 4 to Cs 2 SnCl 6 induced by the internal electric field . This research sheds fresh light on the fabrication of Cs 2 SnCl 6 /C 3 N 4 heterojunctions as well as its effective interfacial charge separation.
研究领域:
材料科学
·
光催化
·
环境化学
·
半导体物理
·
计算化学
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Polymers
·
2023
·Vol. 15
·期 9
·2006
·
IF 5
Kewei Shu,Jiazhen Zhou,Xiaojing Wu,Xuan Liu,Liyu Sun,Yu Wang,Siyu Tian,Huizhu Niu,Yihao Duan,Guangyu Hu,Haihua Wang
As one of the most promising candidates for all-solid-state sodium-ion batteries and sodium-metal batteries, polyvinylidene difluoride (PVDF) and amorphous hexafluoropropylene (HFP) copolymerized polymer solid electrolytes still suffer from a relatively low room temperature ionic conductivity. To modify the properties of PVDF-HEP copolymer electrolytes, we introduce the graphitic C3N4(g−C3N4) nanosheets as a novel nanofiller to form g−C3N4composite solid polymer electrolytes (CSPEs). The analysis shows that the g−C3N4filler can not only modify the structure in g−C3N4CSPEs by reducing the crystallinity, compared to the PVDF−HFP solid polymer electrolytes (SPEs), but also promote a further dissociation with the sodium salt through interaction between the surface atoms of the g−C3N4and the sodium salt. As a result, enhanced electrical properties such as ionic conductivity, Na+transference number, mechanical properties and thermal stability of the composite electrolyte can be observed. In particular, a low Na deposition/dissolution overpotential of about 100 mV at a current density of 1 mA cm−2was found after 160 cycles with the incorporation of g−C3N4. By applying the g−C3N4CSPEs in the sodium-metal battery with Na3V2(PO4)3cathode, the coin cell battery exhibits a lower polarization voltage at 90 mV, and a stable reversible capacity of 93 mAh g−1after 200 cycles at 1 C.
研究领域:
材料科学
·
储能技术
·
电化学
·
聚合物纳米复合材料
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高影响因子
ELECTROANALYSIS
·
2026
·Vol. 38
·期 8
·e70198
·
IF 2.6
Haibo Pan,Yongbo Qi,Fengzhen Xu,Yuanjie Xu
Synthesis at low temperature and interface characteristics in electrocatalysis for nanocomposites are alternative challenge up to date. A SrO nanoparticles (NPs)/g-C 3 N 4 nanosheets (SrO/ng-C 3 N 4 ) composite was prepared by a feasible one-pot synthesis at 80 °C without post-sintering, where SrO NPs (with diameters of 20 ∼ 50 nm) were loaded onto ng-C 3 N 4 nanosheets to form an efficient electrocatalyst. By the aid of XPS and FT-IR analysis, it confirms that SrO NPs were anchored in proximity to the s-triazine units of ng-C 3 N 4 via Sr N bonds. Based on the surface charge characteristics, the electrostatic adsorption between SrO/ng-C 3 N 4 and vanillin as a catalysant was verified. C 7 H 5 O 2 − anions after the hydrolyzation and ionization of vanillin in PBS solution were adsorbed on the surface of positively charged SrO/ng-C 3 N 4 before electro-oxidation. The electrocatalytically active centers, i.e., oxygen vacancies on the surface of SrO NPs, facilitate in the oxidation of vanillin, and further the overpotential of the electrocatalyst by SrO/ng-C 3 N 4 toward vanillin is reduced. A detail eletro-oxidation process of vanillin was identified by UV–vis spectra and differential pulse voltammetry analysis. Based on the Laviron equation, two electrons transfer from vanillin during the oxidation reaction, and speculates the reaction mechanism. Under optimal conditions, vanillin oxidation current is linear to its concentration in the range of 2.0 × 10 −8 to 1.4 × 10 −5 M, with a detection limit of 6.7 nM (S/N = 3). The limit value complies with the requirements of the World Health Organization and the Chinese Health Standard. As-prepared sensor applied for the quantification of vanillin in milk samples is long-term stable, selective, and feasible.
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PLoS One
·
2025
·Vol. 20
·期 10
·e0333967
·
IF 2.6
Yanjin Wang,Zhuo Zhang,Lin Shi,Lidong Kou,Yasong Li
With the extensive use of antibiotics around the world, their contamination problem has now attracted increasing attention, and seeking effective antibiotic contamination management technologies has been imminent. Visible light photocatalytic technology, as an emerging green technology with low cost, high efficiency and good application prospect, has become a research focus both at home and abroad. In this paper, graphitic phase carbon nitride (g-C 3 N 4 ) was used as a photocatalytic material, and the composite photocatalysts g-C 3 N 4 /MoS 2 , g-C 3 N 4 /CuS, g-C 3 N 4 /CdS were produced by compounding it with a series of metal sulfides, and the physical and chemical properties of the composite photocatalysts were characterized by means of SEM, TEM, BET, XRD, XPS, FT-IR, and UV-VIS-NIR. The results show that the prepared composite photocatalytic materials do not change the morphological structure of g-C 3 N 4 , and the introduction of metal sulfides can effectively enhance the light absorption performance and photocatalytic activity of the composites. The best removal of typical antibiotic sulfadimethylpyrimidine (SMT) in water was achieved by g-C 3 N 4 /CdS, with the most stable photocatalytic performance, and the complete removal of SMT could be achieved after 6 h of photocatalysis under LED illumination conditions at wavelengths of 420 nm and 365 nm. g-C 3 N 4 /CdS had the highest photocatalytic activity at pH = 3. Optimal g-C 3 N 4 /CdS was used to prepare flexible polyacrylonitrile carrying carbon nitride nanofiber photocatalysts (PAN/g-C 3 N 4 /CdS) by electrostatic spinning method, which had excellent light absorption properties in UV and visible light regions. SMT removal of PAN/g-C 3 N 4 /CdS reached 100.00% after the light was turned on for 6 h at a wavelength of 365 nm, indicating that the nanofiber photocatalytic materials prepared in this study have excellent photocatalytic activity and antibiotic degradation performance. This paper has important theoretical and practical significance for solving the problem of antibiotic pollution in water bodies.
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Xuejiao Wang,Jiayi Dai,Xueyan Liu,Yang Liu,Yufeng Tao,Erjin Zhang
Noble metal@functional material composites are a promising SERS platform that can overcome the limitations of traditional noble metal-only substrate, achieving the enhancement of SERS performance and the expansion of functionalities. Aiming to obtain high-performance composite SERS substrate, herein, the Ag nanoflowers (NFs)@g-C 3 N 4 hybrid was synthesized by a facile method. The prepared Ag NFs@g-C 3 N 4 substrate achieved highly sensitive SERS detection towards crystal violet with a detection limit down to 10 −11 M. At the same time, a relative standard deviation of less than 15 % for the SERS signal illustrates the satisfactory homogeneity of the obtained substrate. The remarkable SERS activity was attributed to the plasmonic enhancement from Ag NFs and the molecular adsorption capability from g-C 3 N 4 . When employing the Ag NFs@g-C 3 N 4 substrate to detect antibacterial residues in river water, the experimental results show that the detection limits for malachite green and methylene blue are 10 −6 M. This work develops a sensitive nanocomposite SERS substrate for trace molecules detection.
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DYES AND PIGMENTS
·
2026
·
IF 3.9
Zhiling Qiu,Ziyi Yan,Zhangjian Qian,Huimin Zhang,Yucheng Pan,Nan Jiang,Shangyun Wang,Li Na,Xin Xiao
A facile one-pot synthesis of g-C 3 N 4 /ZnO heterojunctions is reported for water remediation. The optimal composite (3:7 mass ratio) achieves enhanced visible-light degradation of methylene blue (k = 0.02033 min -1 ), attributed to interfacial charge separation rather than adsorption, as evidenced by PL and photocurrent measurements. Radical trapping and LC-MS identify •OH and h + as dominant species and reveal a stepwise demethylation degradation pathway. DFT calculations verify a type-II band alignment with a built-in electric field that thermodynamically drives carrier separation. The composite maintains excellent stability over multiple cycles, highlighting its potential for practical photocatalytic applications.
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高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2026
·
IF 5.2
Ning Li,Yihui Qi,Shujie Zang,Tingna Shao,Jiaojiao Gao,Lina Lin,Yu Zhao
A novel TiO 2 –g-C 3 N 4 –BiOI (TCB) dual-heterojunction nanocomposite with a hierarchical nanoflower morphology was synthesized via a combined hydrothermal–calcination method. The TCB-2 sample, which contained 2.4% Bi, exhibited exceptional photocatalytic activity for methyl orange degradation, achieving 98.55% removal under xenon-lamp irradiation within 100 min. SEM characterization revealed a nanoflower architecture composed of interlaced nanosheets with abundant interspaces, providing increased active sites and facilitating reactant diffusion. UV–Vis DRS analysis confirmed the narrowed optical band gap and extended visible-light absorption range. The formation of intimate contact between components, which is a prerequisite for heterojunctions, was supported by XRD and XPS analyses, suggesting the possible establishment of dual heterojunctions (Type II and p-n). The catalyst maintained an 82.80% degradation efficiency after three cycles, demonstrating excellent stability. This work provides valuable insights for designing TiO 2 -based photocatalysts with enhanced visible-light utilization for environmental applications.
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JOURNAL OF HAZARDOUS MATERIALS
·
2017
·
IF 6.065
Yi Li,Yanan Li,Shuanglong Ma,Pengfei Wang,Qianlei Hou,Jingjing Han,Sihui Zhan
Ag 2 WO 4 /g-C 3 N 4 composite photocatalyst was synthesized by polymerization of thiourea and ammonia chloride combined with the deposition-precipitation method, which was applied as an efficient visible-light driven photocatalyst for inactivating Escherichia coli ( E. coli ). The physicochemical properties of these photocatalysts were systematically characterized by various techniques such as SEM, TEM, XRD, FT-IR, BET, UV–vis DRS and PL. The synthesized photocatalysts exhibited outstandingly enhanced photocatalytic disinfection efficiency compared with that of pure g-C 3 N 4 and Ag 2 WO 4 under visible light. Furthermore, the optimal mass ratio of the Ag 2 WO 4 to g-C 3 N 4 was 5 wt%, and a number of live bacteria could be completely inactivated with Ag 2 WO 4 (5%)/g-C 3 N 4 (100 μg/mL) after 90 min under visible light irradiation. The high disinfection efficiency is due to the synergetic effect between g-C 3 N 4 and Ag 2 WO 4 , including a good distribution of Ag 2 WO 4 particles on the surface of g-C 3 N 4 and an improved separation rate of photogenerated electron-hole pairs. The enhanced disinfection mechanism was also investigated using photogenerated current densities and electrochemical impedance spectroscopy (EIS). Considering the bulk availability and excellent disinfection activity of Ag 2 WO 4 /g-C 3 N 4 composite, it is a promising solar-driven photocatalyst for cleaning the microbial contaminated water.
研究领域:
环境科学
·
材料科学
·
光催化
·
水处理
·
纳米技术
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DOI
高影响因子
危险品化学品经营许可证（带存储）