Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Yali Song,Ziyan Li,Cairong Yang,Xiaoyu Wen,Long Huang,Xiaojing Zhang,Yongpeng Ma,Qiong Wang,Hongzhong Zhang
To improve the generation of main active substances (·O 2 – and h + ) in sulfamethoxazole (SMX) photocatalytic processes by g–C 3 N 4 , graphitic carbon nitride/perylene diimide (g–C 3 N 4 /PDI, CNPDI) organic photocatalyst with Z–scheme heterojunction was synthesized. Simultaneously, the in–situ self–assembled PDI was realized by introducing short straight–chain alkanes containing terminal carboxylic acid groups at the imide position of PDI molecule and regulating the pH value of the reaction system. g–C 3 N 4 and PDI successfully combined via the formation of –O C–NH– during the preparation process. The π–π interaction between them was conducive to the charge migration at the heterogeneous interface. The addition of PDI in g–C 3 N 4 significantly improved the absorption ability of visible light and facilitated the transportation of photogenerated carriers, leading to enhanced photocatalytic properties. When 2 mg of PDI combined with 500 mg of g–C 3 N 4 , the obtained CNPDI–2 demonstrated the optimal degradation rate for SMX. When reacted for 120 min under visible light, the SMX photodegradation rate by CNPDI–2 was up to 96.3 % because more ·O 2 – and h + generated and participated in the reaction process. The corresponding pseudo–first–order kinetic constant (0.0281 min –1 ) in CNPDI–2 photocatalytic system was 2.4 and 51 times than that in g–C 3 N 4 system (0.0105 min –1 ) and PDI system (0.0005 min –1 ), respectively. Additionally, CNPDI–2 demonstrated the commendable stability, which was suitable for SMX removal in water environment.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Qiuyu Wang,Xingyu Huo,Jun Wang,Huanyu Chen,Ziwen Wang,Zhe Yin,Binglin Tang,Guoping Yu,Bo Lv
With the escalating energy crisis, clean and renewable hydrogen energy has emerged as a focal point of research. This study utilizes titanium concentrate as the primary raw material and employed a more convenient and efficient mechanical activation-oxidation-reduction-acid leaching process to effectively enrich TiO 2 , thereby producing a highly active and stable TiO 2 photocatalyst substrate. To further enhanced its photocatalytic performance, this research developed a heterostructured mineral-derived material g-C 3 N 4 /TiO 2 -6/Pt. Experimental results indicated that the hydrogen evolution rate of the g-C 3 N 4 /TiO 2 -6/Pt composite material reached 6.42 mmol/g/h within 5 h, whereas that of g-C 3 N 4 /P25/Pt was only 5.92 mmol/g/h. This study underscores the significance of extracting TiO 2 from titanium concentrate and its subsequent applications. By effectively utilizing titanium resources, it aims to address the increasing industrial demand for TiO 2 while providing innovative solutions to combat environmental pollution and mitigate the energy crisis. These findings hold substantial theoretical and practical implications for advancing related fields.
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ACS Applied Energy Materials
·
2025
·
IF 5.5
Liru Yan,Shishuai Sun,Shuangting Ruan,Xiaocheng Liu,Huanqi Cao,Shougen Yin
Design of the photosensitive electrode material provides an effective strategy to improve the capacity and stability of supercapacitors. In this study, the photothermal-driven cobalt–zinc-doped Ni(OH)2/g-C3N4@NF nanoflower electrode materials were prepared base on the in situ chemical etching strategy. The electrochemical performance indicated that the optimized CZNC2.18 (cobalt–zinc codoped β-Ni(OH)2@g-C3N4) electrode material with exceptional stability (103.74% capacitance retention after 5000 cycles at 20 mA/cm2) exhibited an ultrahigh capacitance of 19.10 F/cm2 at a current density of 10 mA/cm2 under illumination, compared to 12.8 F/cm2 under dark conditions, achieving a light gain of 149%. The assembled asymmetric photothermal-assisted supercapacitor device delivers energy densities of 3.55 mWh/cm2 (1.23 mWh/cm2) at corresponding power densities of 8.39 mW/cm2 (37.03 mW/cm2) under illumination, surpassing performance metrics observed under dark conditions. The synergistic effects of photogenerated carriers (holes oxidizing Ni(OH)2 to NiOOH and electrons enhancing conductivity), Zn/Co codoping-induced conductivity improvement, and photothermal-assisted ion transport collectively enable CZNC2.18 exceptional photoelectrochemical performance, establishing a paradigm for light-responsive energy storage material design.
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高影响因子
LANGMUIR
·
2025
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IF 3.9
Ran Yu,Liying Pu,Xiaofang Wang,Peng Liu,Xiang Shen
The eco-friendly nature and energy efficiency of polymeric membranes have established them as pivotal materials for oil-in-water emulsion separation. However, persistent membrane fouling caused by oil deposition remains a major challenge, significantly hindering their practical implementation in industrial settings. In this work, thiol–ene photochemistry was employed to synthesize PEGylated silica nanoparticles (SiO2-g-PEGDA) using poly(ethylene glycol) diacrylate (PEGDA) and hexanedithiol (HD) as monomers. Biomimetic PVDF membranes were engineered via vapor-induced phase separation (VIPS) by integrating SiO2-g-PEGDA nanoparticles, followed by secondary coagulation in a dopamine (DA) solution. The experimental results demonstrate that the biomimetic membranes exhibit a characteristic sponge-like cross-sectional morphology and well-defined rough surface microstructures, which are attributed to the synergistic roles of SiO2-g-PEGDA as nanofillers and DA as interfacial cross-linker during secondary phase separation. Energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) analyses confirm that the combined action of nanoparticles and PDA significantly increases the density of hydrophilic functional groups on membrane surfaces and within pore channels. The membranes exhibit excellent hydrophilicity and underwater superoleophobicity, achieving an outstanding emulsion flux of 3537 Lm–2 h–1 bar–1 and an oil removal efficiency of 98.5%. After 15 cycles of oil–water separation, the membranes maintain a high flux recovery rate of 85.6%. Moreover, the biomimetic membranes possess exceptional operational stability, as evidenced by consistent surface wettability under organic solvents, strong acid and high-salinity conditions.
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PubMed
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2024
·Vol. 45
·期 16
·2400228
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IF 4.2
Zeshang Jiang,Zhongtian Li,Jieting Geng,Lin Xia
To enhance the low-temperature toughness and resistance of the engineering plastic polyamide PA12, this study introduces novel PA12/MVQ@POE- g -MAH ternary composites using a two-step process and dynamic curing. Analytical results indicate that incorporating MVQ@POE- g -MAH into the PA12 matrix markedly enhances its toughness and heat resistance. As the MVQ@POE-g-MAH content increases, the elongation at break of PA12 composites significantly expands from 52.83% to 204.69%, and the notch impact strength escalates from 8.69 to 74.34 kJ m −2 . In addition, the brittleness temperature of PA12 decreases from −59.5 to −67.0 °C. Experimental findings confirm that POE- g -MAH is dispersed at the interface between MVQ and PA12, creating an encapsulated structure of MVQ@POE- g -MAH. This enhancement significantly broadens the potential applications of PA12 by improving its toughness, and resistance to both low and high temperatures, as well as impact endurance.
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PubMed
高影响因子
Reaction Chemistry & Engineering
·
2024
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IF 3.4
Xinyue Zhang,Lin Yuan,Yu Zhang,Xinyu Shu,Renjie Li,Qunfen Deng,Zilong Zhang,Rui Yang
In this work, a modified graphite phase carbon nitride (g-C3N4), used as an efficient photocatalyst, was successfully prepared by employing melamine as a precursor and ammonium chloride as a gas template agent, in conjunction with a two-step calcination strategy to manipulate the polymerization process of melamine. The relevant characterization results indicated that the modified catalyst had loose structure and more active sites, which increased the specific surface area, inhibited the recombination of light-generated electron–hole pairs, and then promoted the generation of active substances. The photocatalytic performance of the catalyst was evaluated using rhodamine B (RhB) as a template under visible light irradiation. The results demonstrated that the secondary calcination temperature significantly influenced the performance of the catalyst. At the optimum secondary calcination temperature (∼650 °C, denoted as 650-CN-2), the reaction rate constant was estimated to be 0.1163 min−1, which was 30.4 and 2.71 times higher than that of pure CN and CN-2, respectively, while achieving a degradation rate of 97% within 30 min. Radical trapping experiments and ESR analysis confirmed that the superoxide free radical (·O2−) serves as the primary active species in photocatalytic degradation. This work not only expanded research ideas for the optimal temperature of the secondary calcination method, but also provided a useful exploration for the efficient synthesis path of catalysts.
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Bioactive Materials
·
2025
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IF 20.3
Yuyun Ye,Yan Liu,Shengchao Ma,Xipeng Li,Wei Wang,Xu Chen,Judun Zheng,Zhijin Fan,Yideng Jiang,Yuhui Liao
Infectious wound healing remains a significant medical challenge due to chronic inflammation and bacterial colonization. Effective antimicrobial and anti-inflammatory therapies are essential to facilitate wound recovery. Herein, we introduce a highly biocompatible, ROS-responsive DNA hydrogel (LGAH), modified with aggregation-induced emission luminogens (AIEgen) and incorporating ginseng-derived exosomes (G-Exos) and nitric oxide (NO) donor-L-arginine (L-Arg) to promote healing of infected wounds. The hydrogel degrades in response to elevated ROS levels, releasing therapeutic agents. Upon laser irradiation, AIEgen generates 1 O 2 , which activates L-Arg to produce NO, leading to a synergistic antimicrobial effect. NO is particularly effective at inhibiting bacterial growth and promoting angiogenesis, supporting wound healing. G-Exos modulate immune responses, reduce inflammation, and promote the transition from the inflammatory to the proliferative phase. They also enhance cell proliferation, migration, and collagen production, which are key to tissue regeneration. In vivo experiments demonstrated that LGAH significantly accelerates S. aureus -infected wound healing by modulating the wound microenvironment and promoting tissue regeneration. Transcriptomic analysis revealed that LGAH down-regulates gene expression in inflammation and immune response signaling pathways while up-regulating genes related to energy metabolism. Biosafety evaluations at cellular and animal levels have demonstrated that LGAH possesses excellent biocompatibility and biodegradability, making it ideal for tissue repair and regeneration. This multifunctional DNA hydrogel system offers a safe and promising strategy for the clinical treatment of infected wounds.
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PubMed
高影响因子
Water Research X
·
2025
·
IF 8.2
Hong Tu,Bihong Tian,Zhichao Zhao,Renjiang Guo,Ya Wang,Shunhong Chen,Jian Wu
The structural modulation of pristine graphitic carbon nitride poses a considerable challenge in the rational design of catalysts for the efficient degradation of small organic pollutants under visible light. In this study, we combined first-principles calculations and the structure-function relationship to predict a high-performance catalyst. The results reveal that CN-8 demonstrates a remarkable degree of electron-hole separation. Notably, CN-8 shows exceptional degradation efficiency towards rhodamine B, tetracycline, bisphenol A, and fluralaner under visible light irradiation. Specifically, the degradation rate constants are 11, 4, 12, and 32 times higher, respectively, compared to bulk g-C 3 N 4 . Through density functional theory calculations and investigations of the structure-function relationship, it is confirmed that the superior catalytic activity of CN-8 lies in modifying the amino position, which alters the electron cloud distribution and promotes the efficient separation of photo-generated electron-hole pairs. This study provides valuable insights for the development of eco-friendly and efficient photocatalysts for environmental remediation.
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高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
Dechao Wang,Lin Chen,Xun Zhu,Dingding Ye,Yang Yang,Hong Wang,Rong Chen,Qiang Liao
Development of a highly performing heterojunction photoanode is significantly important for photoelectrochemical cells. Herein, a novel strategy is proposed to construct a protonated g-C3N4 nanosheets/nitrogen-doped TiO2 photoanode inspired by polydopamine microspheres. The polydopamine microspheres can enhance the adsorption of protonated g-C3N4 nanosheets via electrostatic interaction, facilitating heterojunction formation. Moreover, the addition of the polydopamine microspheres into the preparation process can not only dope a nitrogen element into TiO2, improving solar energy utilization, but also create a vigorous pore structure in the photoanode, promoting mass transport and light scattering. Besides, the specific surface area can also be increased. Owing to these merits, the photoelectrochemical activity of this newly developed photoanode is greatly improved. Furthermore, the superiority of this photoanode is evaluated by integrating it into a photoelectrochemical cell for simultaneous wastewater treatment and power generation. The maximum power density generated by the newly developed protonated g-C3N4 nanosheets/nitrogen-doped TiO2 photoanode is about 138.5% and 40.9% higher than the TiO2 photoanode and the protonated g-C3N4 nanosheets/TiO2 photoanode prepared without using the polydopamine microspheres, respectively. The present study provides a novel strategy for developing a highly performing heterojunction photoanode.
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JOURNAL OF MEMBRANE SCIENCE
·
2020
·
IF 7.183
Yuchuan Liu,Zongxue Yu,Xiuhui Li,Liangyan Shao,Haojie Zeng
In this work, the layered double hydroxide @ graphitic nitrogen carbide (LDH@g-C 3 N 4 @PDA) composite photocatalysts were fabricated by dopamine modification method. Then, the LDH@g-C 3 N 4 @PDA and graphene oxide (GO) composites were assembled on PVDF membrane to construct the photocatalytic self-cleaning composite membrane . The prepared PVDF/LDH@g-C 3 N 4 @PDA/GO composite membrane has excellent performance in contaminant separation and photocatalytic degradation. The rejection rates of methylene blue (MB), rhodamine b (RhB), gasoline, diesel, and petroleum ether were 100%, 94.61%, 96.74%, 93.22%, and 92.35%,respectively. More importantly, under visible-light irradiation, the membrane could achieve continuous and simultaneous flow-through separation and degradation of dye in short time. The rejection rate and the flux of organic dye were 99.28% and 397.14 L•m −2 h −1 bar −1 . The photocatalytic cycle experiment, which has been repeated 10 times, have also revealed the stability and high efficiency of PVDF/LDH@g-C 3 N 4 @PDA/GO membrane on account of its superior photocatalytic self-cleaning function. Therefore, this self-cleaning composite membrane would have a range of applications in wastewater treatment .
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MATERIALS SCIENCE FORUM
·
2020
·
IF 0
Yu Quan Ren,Shi Yong Sun,Edward Opong Acheampong,Fa Qin Dong,Biao Biao Ma,Ke Wang,Xiao Yu Fan
A one-step synthesis of visible light responsive diatomite/g-C3N4 composite material was prepared by impregnation-calcination method. The products were characterized by Scanning electron microscope, X-ray diffractometer, Ultraviolet diffuse reflectance spectroscopy, Fourier transform infrared spectrometer, and Photoluminescence spectrometer. The SEM results showed that g-C3N4 was successfully attached onto the surface of the diatomite. Also the composite materials were more light-responsive compared with the single phase material. The composite materials had a maximum degradation efficiency up to nearly 91.79%. The significant improvement in photocatalytic performance was due to the porous structure of diatomite, increase of contact area of carbon nitride.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2020
·
IF 7.1
Qiaomei Yuan,Lin Li,Yurong Tang,Xinfeng Zhang
In this work, we reported a photocatalytic biosensor for visual detection of superoxide dismutase (SOD) based on Pt-doped graphite phase carbon nitride (g-C 3 N 4 ). Upon illumination by a violet light-emitting diode (LED), Pt-doped g-C 3 N 4 absorbed the light energy and catalytically produced O 2 − which further oxidized the dyes into a colorless end product. In the presence of SOD, it can specifically catalyze O 2 − into oxygen and hydrogen peroxide, leading to a reduced photooxidation and a visual color display. After screening a series of dyes, the azo dye amaranth (AM) was proven to be the best indicator for O 2 − since the azo bond is active and easily oxidized by O 2 − , resulting in a low background. Such a simple photocatalytic sensor allows visual detection of SOD at a nM level without the need of any sophisticated instrument; using spectrometry, the linear response for SOD detection ranges from 1.5 to 4500 nM with a limit of detection (LOD, 3σ) down to 0.3 nM. The sensor was also successfully applied for label-free and wash-free detection of SOD in human serum samples with a satisfactory recovery.
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