JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Yan An,Xiaoping Hu,Xinyu Wang,Jian Tian
Solar energy conversion into hydrogen (H 2 ) energy has attracted much attention. However, the low light utilization rate and fast carrier recombination of photocatalysts extremely limit the practical application of photocatalytic H 2 production. In this paper, MoSe 2 -NiSe with abundant active sites and interfacial electronic structures as dual co-catalysts were assembled on g-C 3 N 4 nanosheets (NSs) vis a solvothermal reaction process. MoSe 2 -NiSe/g-C 3 N 4 NSs composite exhibited improved light absorption and photoelectrochemical properties. The photocatalytic H 2 production rate of MoSe 2 -NiSe/g-C 3 N 4 composite achieved 2379.04 μmol·h −1 ·g −1 , which is 99.25, 1.44, and 3.67 times those of pure g-C 3 N 4 nanosheets (23.97 μmol·h −1 ·g −1 ), MoSe 2 /C 3 N 4 (1654.57 μmol·h −1 ·g −1 ), and NiSe/C 3 N 4 (649.08 μmol·h −1 ·g −1 ), respectively. The apparent quantum efficiency (AQE) value of MoSe 2 -NiSe/g-C 3 N 4 achieved 4.07 % under light at λ = 370 nm. The corresponding characterization and experiments proved that 2D ultrathin g-C 3 N 4 NSs with a large surface area and short charge-transfer distance could facilitate light scattering and the transport of photoexcited electrons. MoSe 2 -NiSe, as a dual co-catalyst, showed strong electronic synergistic interaction between the interfaces, thus improving the conductivity and promoting the electron transfer process.
研究领域:
材料科学
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能源化学
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光催化技术
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DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2019
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IF 4.084
Zhaohui Huang,Hui Chen,Lei Zhao,Xuan He,Yingying Du,Wei Fang,Weixin Li,Pan Tian
The development of ultraviolet to near-infrared (UV-Vis-NIR) responsive photocatalysts offers a unique opportunity for the full use of solar energy to solve the energy and the environmental problems. Here, successful preparation of a three-dimensional (3D) porous photocatalyst of graphitic carbon nitride quantum dot (CNQDs) modified g-C 3 N 4 /graphene oxide composite aerogel (CNGO/CNQDs) via hydrothermal and vacuum injection method was reported. In this unique ternary 3D photocatalyst, graphene oxide could improve the separation of photogenerated electrons and holes and promote the charge separation, while the aerogel's 3D network structure provided a rich active site. Simultaneously, due to the appropriate up-conversion performance of the nitrogen carbide quantum dots, CNGO/CNQDs achieved a light response from ultraviolet (UV) to near-infrared (NIR). These properties endow it with a good photocatalytic performance. The hydrogen production efficiency of CNGO/CNQDs reached 1231 μmol h −1 , which was 16 times more than that of matrix material . In addition, the apparent quantum yields (AQY) of CNGO/CNQDs at wavelengths of 420 nm and 700 nm were 13% and 0.116%, respectively.
研究领域:
材料科学
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能源与环境科学
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产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
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2018
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IF 1.686
Shiyu Zuo,Haiming Xu,Wei Liao,Lei Sun,Qiang Li,Jie Zan,Binyang Zhang,Dongya Li,Dongsheng Xia
In this study, g-C 3 N 4 Cu 2 O was successfully synthesized in the presence of PEG-400 surfactant via an acid treatment hydrothermal method and a high-temperature calcination method. The structures and properties of as-synthesized samples were characterized using a range of techniques, such as XPS, TEM, PL and BET. The g-C 3 N 4 Cu 2 O heterojunction exhibits the enhanced photocatalytic performance and high stability. It is revealed that the addition of PEG can promote the heterojunction effect of g-C 3 N 4 Cu 2 O, effectively improving the crystallinity and specific surface area of the photocatalyst, separation efficiency of photocarriers, and light absorption, thus enhancing the photocatalytic performance.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH PART B-PESTICIDES FOOD CONTAMINANTS AND AGRICULTURAL WASTES
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2025
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IF 1.8
Chenxi Zhang,Jingyi Wang,Sile Liu,Yue Han,Jinyu Wang,Hailong Wang
The widespread use of antibiotics has led to significant water pollution. Photocatalysis can effectively degrade antibiotics, but the performance is greatly limited by the photogenerated carrier recombination in the photocatalytic material g-C3N5. Constructing heterojunctions can enhance interfacial charge transfer, leading to more stable and efficient photocatalysis. This study synthesized a Fe2O3/g-C3N5 heterojunction using the solvothermal method. The Z-scheme charge transfer mechanism facilitated efficient separation of photogenerated carriers, preserving photoelectrons and holes with high redox activity. This process generated a substantial amount of highly reactive free radicals such as ·O2− and ·OH, enabling the efficient degradation of tetracycline (TC). Under the optimal conditions of initial concentration of TC was 200 mg/L, the quality ratio of Fe2O3 and g-C3N5 was 1:2, the catalyst dosage was 50 mg and pH = 7.0, the TC degradation rate reached 92.46% within 60 min of visible light irradiation. The photocatalytic activity’s enhancement was attributed to broad spectral absorption and effective photogenerated carrier separation. Furthermore, the photocatalytic performance can be affected by the presence of inorganic salt ions such as HCO3− and CO32−.
研究领域:
环境科学
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材料科学
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生物学
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
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2020
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IF 6.182
Xiaoxue Zhao,Jingru Guan,Jinze Li,Xin Li,Huiqin Wang,Pengwei Huo,Yongsheng Yan
The conversion of CO 2 into high value-added carbon-based compounds through photocatalytic reduction technology is considered as one of the more promising strategies to solve the greenhouse effect. And construction of heterojunction photocatalysts can promote the separation of photoelectron-hole pairs, so as to achieve higher activity of photocatalytic CO 2 reduction. Hence, Pt@CeO 2 /3DCN heterojunction are prepared by calcination method and photoreduction technology. The photocatalytic results revealed that Pt@CeO 2 /3DCN show better photocatalytic activity for reducing CO 2 into CO and CH 4 , compared with 3DCN. Especially, Pt@45CeO 2 /3DCN shows the maximum photocatalytic activity of 4.69 and 3.03 μmol·h −1 ·g −1 for CO and CH 4 under UV light irradiation, respectively, and the reduction activity did not decrease significantly after five cycles. The enhanced photoreduction of CO 2 performance can be ascribed to the synergistic effects of the oxygen vacancies in CeO 2 for CO 2 activation and heterojunction for electron separation. Besides, Pt nanoparticles (NPs) on CeO 2 /3DCN can further promote the transfer of electrons, resulting in higher photocatalytic activity.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Nanomaterials
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2022
·Vol. 12
·期 18
·3089
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IF 5.719
Li Tan,Yiming Chen,Didi Li,Shaobin Wang,Zhimin Ao
An in situ photo-Fenton system can continuously generate H2O2by photocatalysis, activating H2O2in situ to form strong oxidizing ·OH radicals and degrading organic pollutants. A WSe2/g-C3N4composite catalyst with WSe2as a co-catalyst was successfully synthesized in this work and used for in situ photo-Fenton oxidation. The WSe2/g-C3N4composite with 7% loading of WSe2(CNW2) has H2O2production of 35.04 μmol/L, which is fourteen times higher than pure g-C3N4. The degradation efficiency of CNW2 for phenol reached 67%. By constructing an in situ Fenton-system, the phenol degradation rate could be further enhanced to 90%. WSe2can enhance the catalytic activity of CNW2 by increasing electron mobility and inhibiting the recombination of photogenerated electron–hole pairs. Moreover, the addition of Fe2+activates the generated H2O2, thus increasing the amount of strong oxidative ·OH radicals for the degradation of phenol. Overall, CNW2 is a promising novel material with a high H2O2yield and can directly degrade organic pollutants using an in situ photo-Fenton reaction.Keywords:WSe2/g-C3N4;visible light;in situ photo-Fenton;phenol degradation
研究领域:
环境科学
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材料科学
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催化
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DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2021
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IF 6.707
Bin He,Mi Feng,Xinyan Chen,Yuandong Cui,Dingwei Zhao,Jian Sun
The limited photocatalytic performance of g-C 3 N 4 has become a bottleneck that restricts the widespread applications in degradation of organic pollutants. In this study, an efficient 1D/2D g-C 3 N 4 /g-C 3 N 4 homojunction was constructed by the synergistic category of dual-ions induction in one pot fashion, integrating multi-advantages of homojunction and doping alkali metal potassium (K). Systematic characterizations confirmed the formation of K ion decorated 1D/2D homojunction structure, and revealed a possible fabrication mechanism. The photocatalytic performances were evaluated towards degrading rhodamine B (Rh B), and ciprofloxacin hydrochloride (CFH), respectively, representing dyeing and antibiotic wastewater treatment. Compared to pristine g-C 3 N 4 , the as-modified catalysts exhibited obvious activity enhancements in both photo-degradation reaction rates, and efficiencies of Rh B and CFH. Detailed information from DRS, ESR, PL results revealed that the obtained excellent performance might ascribe to the improvement of the separation of photogenerated carriers, the harvest of visible light, and the yields of active species. Moreover, the reaction mechanism and stability test were also studied in detail. This study provided a new category for constructing efficient and ion-doping homojunction structure for the enhancement of visible-light activity of g-C 3 N 4 and would promote practical applications of solar energy and metal-free semiconductors.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2014
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IF 6.007
Ze’ai Huang,Qiong Sun,Kangle Lv,Zehui Zhang,Mei Li,Bing Li
In this paper, effect of contact interfaces of high-energy TiO 2 , (1 0 1) and (0 0 1) facets, with g-C 3 N 4 on the photocatalytic activity of g-C 3 N 4 /TiO 2 hybrid was studied using TiO 2 hollow nanobox (TiO 2 -HNB) assembly from high-energy TiO 2 nanosheets (TiO 2 -NS) as model. The prepared photocatalyst was characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), scanning electron microscopy (SEM), nitrogen sorption , Fourier transform infrared spectroscopy (FT-IR), diffuse reflectance spectroscopy (DRS) and X-ray photoelectron spectrometer (XPS). The photoreactivity of the photocatalyst was evaluated by measure the formation rate of photo-induced hydroxyl radicals ( OH) using coumarin as a probe molecule and photocatalytic degradation of Brilliant Red X3B (an anionic dye) under UV irradiation ( λ = 365 ± 10 nm). It was found that g-C 3 N 4 /TiO 2 -HNB forms direct Z-scheme photocatalytic system, which shows superior enhancement on the photocatalytic activity of TiO 2 than g-C 3 N 4 /TiO 2 -NS. It is by contacting g-C 3 N 4 with (1 0 1) facets, g-C 3 N 4 can efficient remove the photo-generated electrons accumulated on (1 0 1) facets of high-energy TiO 2 , which results in spatially isolated photo-generated electrons and holes, enhancing the photocatalytic activity.
研究领域:
材料科学
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环境科学
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光化学
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产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
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2025
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IF 4.6
Xin Tian,Jianru Chen,Ruobing Jiang,Haiyang Chen,Jielin Zhang,Jinlong Ren,Xihao Yu,Lina Liu,Chenchen Feng,Cuixia Li,Fucheng Yu,Kechao Hu,Xiaogang Hou
Hydroxylated carbon quantum dots (OH-CQDs) modified g-C 3 N 4 hollow microspheres were prepared using a supramolecular precursor self-assembly method. The incorporation of OH-CQDs into the precursor resulted in the formation of a hollow flower-like microsphere structure composed of g-C 3 N 4 nanoflakes in the final samples, which exhibited a morphology that was roughly inherited from that of the supramolecular precursor. The incorporation of an optimal quantity of OH-CQDs did not result in a deterioration of the g-C 3 N 4 product morphology; rather, it led to an enhancement in its microsphere structure. The modified nanostructure of g-C 3 N 4 resulted in a significant increase in reaction sites and promoted the adsorption of organic dye molecules on the surface of the g-C 3 N 4 photocatalyst during degradation reactions. Furthermore, despite the reduction in carrier concentration of g-C 3 N 4 resulting from the decoration with OH-CQDs, the impedance was significantly diminished and the photocurrent density was also markedly improved. It can thus be concluded that the decoration of OH-CQDs has significantly enhanced the mobility of g-C 3 N 4 , thereby contributing to the improvement of the photocatalytic performance of the g-C 3 N 4 photocatalyst.
研究领域:
材料科学
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环境科学
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化学工程
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产品关联
DOI
高影响因子
Journal of Biomaterials and Tissue Engineering
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2022
·Vol. 12
·期 9
·1683-1691
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IF 0.144
Li Hongxia,Gao Xiang,Niu Xiaohui,Zhang Deyi,Fan Haiyan,Wang Kunjie
The emergence of bacterial resistance to traditional antibiotics and its global spread has brought huge threats to human life and health, and the need for new alternative antibacterial agents has become increasingly urgent. The rapid development of nanoscience provides a potential alternative
to antibacterial therapy. In this study, g-C3N4 was synthesized using melamine as the raw material. It was then successfully combined with carbon quantum dots (CQDs) and silver sulfide to synthesize a g-C3N4/CQDs/Ag2S composite material.
Such combination narrows the band gap of g-C3N4 from 2.53 eV to 2.21 eV and enhances the photocatalytic efficiency. Consequently, it indicated photocatalytic antimicrobial effects against three strands of bacteria, Shylococcus aureus (Grampositive), Escherichia
coli (Gram-negative) and Methicillin-resistant Staphylococcus aureus under the irradiation of visible light. Other than the common pathogens, g-C3N4/CQDs/Ag2S exhibited an appreciable inhibition against the well-known drug-resistant bacteria. With
its antimicrobial features and excellent photoelectric properties, the as prepared nanocomposites show its potential in the development of new antimicrobial and photocatalytic materials.
研究领域:
材料科学
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微生物学
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纳米医学
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DOI
高影响因子
RSC Advances
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2024
·Vol. 14
·期 49
·36181-36192
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IF 3.9
Bo Zhang,Chaoqi Li,Shasha Liu,Lixuan Zhuang,Weiqi Zhang,Limei Huang,Zhenzhen Jia,Dongdong Chen,Xiang Li
A CaMnO3/g-C3N4 heterostructure, demonstrating promising photocatalytic performance for tetracycline (TC), was successfully synthesized using a straightforward calcination approach in this study. A series of characterization methods were employed to assess the physicochemical properties and visible-light responsiveness of the synthesized photocatalysts. The photocatalytic degradation rates of TC for the three prepared samples were evaluated. The results indicate that the CaMnO3/g-C3N4 composite exhibits the highest photocatalytic activity under visible-light irradiation, surpassing that of the individual components. Specifically, the degradation rate of CaMnO3/g-C3N4 is 0.031 min−1, which is 2.07 and 2.82 times greater than that of the pristine g-C3N4 and CaMnO3, respectively. Our findings highlight the significant potential of eco-friendly perovskites in developing visible-light-activated g-C3N4-based heterostructures for practical photocatalytic applications.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
REVIEWS ON ADVANCED MATERIALS SCIENCE
·
2023
·Vol. 62
·期 1
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IF 3.6
Yuchen Guan,Zhixin Ren,Yan Lang,Tianze Liu,Zhao Gong,Yuguang Lv
Graphite-carbon nitride (g-C 3 N 4 ) was prepared by thermocondensation, and g-C 3 N 4 /BiVO 4 material (GCB) and g-C 3 N 4 /CNTs composite material (GCC) were prepared by doping different contents of BiVO 4 and carbon nanotubes (CNTs) with g-C 3 N 4 samples, respectively. Then, BiVO 4 , CNTs, and g-C 3 N 4 samples with different contents were doped to prepare ternary composite material (GCBC). In the performance experiment, Sulfamethoxazole (SMZ) was used as degradation material to evaluate the photocatalytic performance of the prepared samples, and the degradation reaction kinetics equation, quadric cycle stability experiment, free radical capture, and intermediates identification were studied. The intermediates of photocatalytic degradation of SMZ were analyzed by high-performance liquid chromatography-mass spectrometry. From the experimental data, it can be seen that for SMZ solution, when the reaction time T = 0 min and retention time rt = 7.53 min, there is a peak corresponding to the substance with m / z [M + H] + of 254, which is judged as SMZ. At 20, 40, and 60 min, rt was 2.00, 7.06, and 9.57 min, indicating the presence of intermediates in the photocatalytic process. Experimental analysis shows that there are three intermediates of SMZ degradation by composite sample GCBC. In this work, three kinds of composite materials were successfully prepared, and a variety of characterization, SMZ as pollutants, test the photocatalytic performance of composite materials (GCB, GCC, and GCBC) samples, and elucidated the cyclic stability of the material, active species capture, and photocatalytic degradation mechanism.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
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