Journal of Water Process Engineering
·
2025
·
IF 6.7
Lanyu Qi,Guofeng Ma,Ronghui Kou,Ziyao Wang,Hongling Zhang,Yanhong Yang
The Fenton-like process is a highly efficient and widely applied advanced oxidation technology for degrading organic pollutants under dark conditions. However, its development is limited by low H 2 O 2 utilization, incomplete mineralization, and limited optimal pH range. We developed a CoAl-LDH/porous g-C 3 N 4 catalyst via high-temperature thermal polymerization with NH 4 HCO 3 as a dynamic gas template and urea as a precursor. The reaction rate constant of CoAl-LDH/porous g-C 3 N 4 -H 2 O 2 system for degradation of Rhodamine B is 0.0199 min −1 , which is about 1.58 times that of the CoAl-LDH-H 2 O 2 system. Moreover, the catalyst sustained performance over four cycles and maintained high activity in degrading three different substrates. The high catalytic activity is attributed to the rich porous structure of g-C 3 N 4 , the presence of abundant active sites, and the synergistic interaction between the CoAl-LDH and g-C 3 N 4 , which promotes the generation of ·OH, 1 O 2 , ·O 2 − , facilitating pollutant degradation. This study highlights the potential of this CoAl-LDH/porous g-C 3 N 4 -based Fenton-like system for applications in dye wastewater treatment.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Xu Jia,Zhiqi Song,Jiaqi Zhang,Jiaolong Qiao,Liuxue Zhang,Xiulian Wang,Shuyan Jiao,Guomin Yu
To enhance the hydrogen production efficiency and stability in photocatalysis, a ternary heterojunction composite CdS@Ce-MOF/g-C 3 N 4 was developed by in-situ growth of Ce-MOF and CdS on graphitic carbon nitride (g-C 3 N 4 ). The synthesized composite not only mitigated the photocorrosion of sulfides but also established a stepwise energy-level alignment and built-in electric field within the heterojunction. These structural advantages effectively facilitated the separation of photogenerated electron-hole pairs and suppress their recombination, thereby significantly improving photocatalytic hydrogen evolution performance. Under simulated sunlight irradiation, the composite exhibited a hydrogen production rate of 4953.125 μmol g −1 , which is 7 times higher than that of pristine g-C 3 N 4 . Moreover, the hydrogen evolution rate remained stable with negligible degradation after multiple cycling tests, demonstrating excellent durability. The CdS@Ce-MOF/g-C 3 N 4 composite, with its superior hydrogen generation capacity and robust stability in photocatalytic water splitting, provides a promising alternative for advancing research on high-performance photocatalysts.
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Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yao Lu,Mengjie Fu,Cheng Cheng,Haocheng Yang,Xinyi Ni,Jiayuan Guo,Shihai Cao
Photocatalytic technology and peroxymonosulfate (PMS) based advanced oxidation technology have been proven to be simple and effective strategies for recalcitrant organic pollutants degradation. In this work, we designed and prepared a coupled photocatalytic and advanced oxidation system for sulfamethazine (SMR) antibiotics degradation. Firstly, a series of Z-scheme Co 9 S 8 /g-C 3 N 4 heterojunction photocatalysts are prepared by a simple two-step method and further work as PMS activators. The prepared Co 9 S 8 /g-C 3 N 4 photocatalysts exhibit a great improvement in electron-hole pairs migration and visible-light response due to heterojunction formation. In addition, the g-C 3 N 4 acts as a substrate to anchor the Co 9 S 8 nanoparticle, which suppresses the Co 9 S 8 leaching and prevents the Co 9 S 8 oxidation. Consequently, the Co 9 S 8 /g-C 3 N 4 /PMS system displayed an improved SMR degradation ability (93 % for Co 9 S 8 /g-C 3 N 4 /PMS vs. 86 % for Co 9 S 8 /g-C 3 N 4 ). After the fourth cyclic degradation experiment, the Co 9 S 8 /g-C 3 N 4 /PMS system still maintained a comparatively high degradation rate. Considering its good properties and better degradation performance, we propose that the synergistic effect of photocatalytic technology and PMS possess a promising prospect for application in environmental treatment.
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ANALYTICA CHIMICA ACTA
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2025
·
IF 6
Hui Zhang,Ziqi Wang,Yahui Ji,Feifei Chen,Fei Wang,Gen Liu
Background Glutathione (GSH) serves as a pivotal antioxidant within biological systems. Dysregulated GSH levels are associated with a spectrum of pathologies, including carcinogenesis, hepatic dysfunction, and neurodegenerative disorders. Developing robust GSH detection methodologies is essential for assessing cellular health, facilitating early diagnosis of disease states, and tracking therapeutic efficacy. Electrochemiluminescence (ECL), which integrates electrochemical reactions with luminescent output, offers low background noise, making it highly suitable for biomolecule analysis. ECL-based GSH assays employing advanced nanomaterials are anticipated to amplify signals at low GSH concentrations, thereby playing a critical role in clinical diagnostics and biochemical research. Results This study presents a novel ECL sensor for the ultrasensitive detection of GSH, utilizing chromium/g–C 3 N 4 –loaded carbon nanospheres (CNs@Cr/g-C 3 N 4 ) composites. Carbon spheres (CNs) and chromium (Cr) can improve the ECL properties of g-C 3 N 4 . However, the ECL signal of CNs@Cr/g-C 3 N 4 is quenched (off-state) due to complex formation with Cu 2+ . Upon GSH addition, the higher coordination affinity between GSH and Cu 2+ partially restores the ECL signal of g-C 3 N 4 (on-state), allowing for quantitative GSH detection. Under optimized conditions, the linear detection range for GSH extends from 5.0 × 10 −9 to 1.0 × 10 −4 M with a limit of detection (LOD) of 3.3 × 10 −10 M (S/N = 3), alongside high selectivity, stability, and reproducibility. More notably, the as-proposed ECL sensor was successfully applied to the quantification of GSH in real drug samples with excellent recovery rates. Signifiance In contrast to traditional techniques for GSH detection, our approach involves a one-time chemical modification of the electrode, eliminating the need for complex probe immobilization steps and streamlining the detection process. Besides, this “off-on” ECL sensing strategy, leveraging Cu 2+ and CNs@Cr/g-C 3 N 4 , offers an innovative approach for developing advanced sensing systems. And this method is user-friendly, cost-effective, holding significant potential for applications in clinical diagnostics and pharmaceutical analysis.
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Nanoscience and Nanotechnology Letters
·
2019
·Vol. 11
·期 6
·804-812
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IF 0
Chen Ling,Liu Yumeng,Matras-Postolek Katarzyna,Yang Ping
Graphitic carbon nitride (g-C3N4) nano-materials with different morphologies were prepared in this study by two-steps through controlling the mercapto group-induced assembly. Mercaptopropyl trimethoxysilane (MPS)-decorated SiO2 nanospheres were employed
as hard templates to produce g-C3N4 in the first step. Different morphologies of g-C3N4, such as hollow spheres, nanotubes and quasi-belts, were created in the second step by controlling the concentration of etching agents, reaction time, and process.
During the etching process, the mercapto groups in MPS can induce the assembly of g-C3N4 and play a crucial role of tuning the morphologies of g-C3N4, which is the key point for morphology adjustment. To enhance photolysis activity, cobalt-, boron-,
and carbon-doped g-C3N4 were further prepared to tune the band gap and absorption in visible light. The morphologies of doped samples changed after doping. In addition, carbon self-doped g-C3N4 exhibited the best photo-redox activity due to increased
visible light absorbance, electrical conductivity, and narrow band gap.
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Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 18
·11069-11076
·
IF 10.733
Zongjie Sun,Yuhan Li,Shuyang Zhang,Lei Shi,Hu Wu,Huaitian Bu,Shujiang Ding
Solid polymer electrolytes (SPEs) are expected to improve the safety and performance of lithium ion batteries (LIB). However, the low ionic conductivity limit the further application of PEO based electrolytes. Herein, g-C3N4 nanosheets is proposed as a novel filler for PEO based electrolytes. The addition of g-C3N4 improves the electrical properties (ionic conductivity, lithium ion transference number and electrochemical window), mechanical properties and thermal stability of the composite electrolyte. The two-dimensional g-C3N4 forms an effective ion transport network in the composite electrolyte. In addition, the surface atoms of the g-C3N4 interact with groups in the lithium salt, promoting further dissociation of the lithium salt. Furthermore, the all solid state batteries assembled by the g-C3N4 composite electrolyte exhibited good cycle performance at 60 °C (remained at 155 mA h g−1 after 100 cycles). Owing to the simple synthesis and environmental friendliness, g-C3N4 nanosheets has a certain practical prospect as a filler for solid polymer electrolytes.
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International Journal of Environmental Research and Public Health
·
2022
·Vol. 19
·期 14
·8683
·
IF 4.614
Xiang Guo,Lei Rao,Zhenyu Shi
Adsorption can quickly remove pollutants in water, while photocatalysis can effectively decompose organic matter. B-TiO2/g-C3N4ternary composite photocatalytic materials were prepared by molten method, and their adsorption–degradation capability under visible light conditions was discussed. The morphology of the B-TiO2/g-C3N4materials was inspected by SEM, TEM, BET, and EDS, and the results showed that close interfacial connections between TiO2and g-C3N4, which are favorable for charge transfer between these two semiconductors, formed heterojunctions with suitable band structure which was contributed by the molten B2O3. Meanwhile, the molten B2O3effectively increased the specific surface area of TiO2/C3N4materials, thereby increasing the active sites and reducing the recombination of photogenerated electron–hole pairs and improving the photocatalytic degradation abilities of TiO2and g-C3N4. Elsewhere, the crystal structure analysis (XRD, XPS, FTIR) results indicated that the polar -B=O bond formed a new structure with TiO2and g-C3N4, which is not only beneficial for inhibiting the recombination of electron holes but also improving the photocatalytic activity. By removal experiment, the adsorption and degradation performances of B-TiO2/g-C3N4composite material were found to be 8.5 times and 3.4 times higher than that of g-C3N4. Above all, this study prepared a material for removing water pollutants with high efficiency and provides theoretical support and experimental basis for the research on the synergistic removal of pollutants by adsorption and photocatalysis.Keywords:adsorption;degradation;B2O3;TiO2/C3N4;molten
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JOURNAL OF HAZARDOUS MATERIALS
·
2014
·
IF 4.331
Fa-tang Li,Ye Zhao,Qing Wang,Xiao-jing Wang,Ying-juan Hao,Rui-hong Liu,Dishun Zhao
Novel Al 2 O 3 /g-C 3 N 4 heterojunction photocatalysts were fabricated through ultrasonic dispersion method. Al 2 O 3 , obtained via solution combustion, contained amorphous ingredient with lots of defect sites and was used as active component for transferring photo-induced electrons of g-C 3 N 4 . G-C 3 N 4 was grafted surface hydroxyl groups in the presence of ammonia aqueous solution to combine with Al 2 O 3 possessing positive charges via hydrogen bond . The XRD, SEM, element map, TEM , HRTEM, FT-IR, and XPS results indicate that these synthesized materials are two-phase hybrids of Al 2 O 3 and g-C 3 N 4 with interaction. The photocatalytic results for the degradation of rhodamine B (RhB) indicate that the most active heterojunction proportion is 60 wt.% g-C 3 N 4 :40 wt.% Al 2 O 3 , the visible light photocatalytic activity of which is 3.8 times that of a mechanical mixture. The enhanced performance is attributed to the high separation efficiency of photo-induced electrons from the LUMO of g-C 3 N 4 injected into the defect sites of Al 2 O 3 , which is verified by photoluminescence spectroscopy (PL) and surface photovoltage (SPV) measurements. The electron paramagnetic resonance (EPR) signals and radical scavengers trapping experiments reveal holes (h + ) and superoxide anion radical ( O 2 − ) are the main active species responsible for the degradation of RhB.
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GREEN CHEMISTRY
·
2013
·Vol. 15
·期 9
·2525-2531
·
IF 6.828
Dongshun Deng,Yang Yang,Yutong Gong,Yi Li,Xuan Xu,Yong Wang
Palladium nanoparticles supported on a mesoporous graphitic carbon nitride, Pd@mpg-C3N4, has been developed as an effective, heterogeneous catalyst for the liquid-phase semihydrogenation of phenylacetylene under mild conditions (303 K, atmospheric H2). A total conversion was achieved with high selectivity of styrene (higher than 94%) within 85 minutes. Moreover, the spent catalyst can be easily recovered by filtration and then reused nine times without apparent lose of selectivity. The generality of Pd@mpg-C3N4 catalyst for partial hydrogenation of alkynes was also checked for terminal and internal alkynes with similar performance. The Pd@mpg-C3N4 catalyst was proven to be of industrial interest.
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CATALYSIS TODAY
·
2013
·
IF 2.98
Xuefeng Hu,Huanhuan Ji,Fei Chang,Yongming Luo
In this study, a rapid reduction of Cr(VI) and degradation of 2,4,6-trichlorophenol (2,4,6-TCP) in a simultaneous manner was reported through the catalysis of g-C 3 N 4 under visible light ( λ > 420 nm) irradiation. The effects of initial concentration of reactants, dissolved O 2 and pH value were investigated systematically. It indicated that, under the optimized concentration, the Cr(VI) reduction and 2,4,6-TCP oxidation could be accomplished in couple of hours in the presence of g-C 3 N 4 . And also, the O 2 involvement and low pH value were able to significantly improve the removal rate of Cr(VI) and 2,4,6-TCP. In addition, the reaction mechanism was investigated through monitoring the reduced states of Cr(VI) and active oxygen intermediates formed during photoreaction by ESR and XPS, as well as determining the degradation products of 2,4,6-TCP by HPLC–MS. The results supported that the redox reactions of Cr(VI) and 2,4,6-TCP can be performed simultaneously via a synergistic oxidation–reduction mechanism in the presence of g-C 3 N 4 under visible light irradiation.
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JOURNAL OF NANOPARTICLE RESEARCH
·
2021
·Vol. 23
·期 1
·1-10
·
IF 2.253
Liu Wenwen,Peng Renfu,Pan Jun
The severe recombination of photoinduced carriers is one of the major problems encountered in C 3 N 4 -based photocatalyst for hydrogen generation. Herein, PtPd/C 3 N 4 composites by in situ growth of cubic PtPd bimetallic co-catalyst on the surface of C 3 N 4 were constructed for photocatalytic hydrogen generation under visible light irradiation. The phase structure, microstructure, and optical property were characterized by X-ray diffraction, transmission electron microscopy, and UV-Vis diffuse reflectance spectroscopy. Photocatalytic hydrogen generation results showed that the growth of a moderate amount of cubic PtPd bimetallic co-catalyst on C 3 N 4 is excellent beneficial for enhancing hydrogen generation activity. By optimizing the loading content of cubic PtPd bimetallic co-catalyst, the PtPd/C 3 N 4 composite provided a maximum hydrogen generation rate of 54.31 μmol h −1 . The enhancement of the photocatalytic activity can be attributed to the efficient separation and transfer of photoinduced carriers. On one hand, PtPd bimetal can extract electrons from C 3 N 4 , which promotes the separation efficiency of the carriers. On the other hand, the face-to-face interface formed between PtPd cubes and C 3 N 4 nanosheets has a large contact area, resulting in lots of unique high-speed carrier transfer channels in PtPd/C 3 N 4 composite, which promotes the transfer efficiency of the carriers. The work highlights the construction of less expensive and suitable shape of co-catalyst for enhanced photocatalytic activity.
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ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2022
·
IF 7.129
Shihuan Lu,Xizi Li,Bingzhi Yu,Jiafeng Ding,Yuchi Zhong,Hangjun Zhang
Efficient treatment of cyanobacterial blooms in eutrophication waters by safe and reliable nanomaterials is a big challenge for reducing environmental health risks. Herein, a novel strategy combining palladium clusters (Pd n ) with g-C 3 N 4 nanocomposite was presented to achieve high-efficient removal of Microcystis aeruginosa cells through coagulation and breakage. Interestingly, 95.17% of algal cells (initial concentration of 5.6 × 10 6 cells mL −1 ) were promptly removed in the Pd/g-C 3 N 4 (5%) system within only 10 min and without visible light irradiation and persulfate activation. Both the release of potassium ion and microcystin during the removal process and the transmission electron microscope observations of Microcystis aeruginosa cells proved that the integrity of the algal cell membrane was destroyed. The removal of Microcystin-LR (MC-LR) were further confirmed in the next process. Pd metal interaction and breakage against algal cells may cause disruption of algal cells. This study describes a novel technology for the superfast removal of harmful algae and may provide a new insight into the control of cyanobacterial blooms in practical applications.
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