CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Kexin Li,Bin He,Ruirui Wang,Ruiyi Yan,Ruirui Zhang,Ruixia Liu
The selective oxidation reaction of cyclohexane is one of the typical activated sp 3 C-H reactions, and its product adipic acid (AA) is the indispensable raw material used to produce nylon. However, subjecting to the inertness of C-H bond and the great reactivity of AA, the targeted transformation of cyclohexane remains a challenge. Here, the interfacial hydrogen bond (IHD) was developed by anchoring CeO 2 on graphite carbon nitride (g-C 3 N 4 ) surface, which could boost targeted acquisition adipic acid from aerobic oxidation of cyclohexane. The results indicated that the IHD effect can be flexibly regulated by changing the ratio of Ce 3+ /Ce 4+ , further optimizing the properties of surface OH species and Lewis acid sites. Under the synergistic effect of Ce 3+ /Ce 4+ and Lewis acid sites on reaction interface, the glorious performance (32.2% conversion of cyclohexane with 66.4% selectivity) was obtained over the as-prepared CeO 2 /g-C 3 N 4 IHD system. In addition, the interfacial adsorption properties of cyclohexane were explored by the virtue of in situ infrared spectroscopy, revealing the IHD effect could tune the adsorption behavior of cyclohexanone and further improve the selectivity of AA. This work disclosed that engineering the interface hydrogen bond effect between CeO 2 and g-C 3 N 4 provided feasible strategies to obtain excellent catalyst for cyclohexane oxidation.
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Environmental Science-Nano
·
2024
·Vol. 11
·期 7
·3202-3213
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IF 5.8
Siyu He,Guanlong Wang,Yaoqi Liu,Lingzhi Luo,Tingting Jiang,Tianbin Fan,Xingyu Zhu,Yichao Ding,Jiang Jing,Sujun Guan
The photocatalytic activity of g-C3N5 is limited by its low photoelectric separation efficiency and high carrier recombination rate. To address this problem, the band gap of g-C3N5 was controlled via P doping, followed by deposition of a CoOOH·CoOx cocatalyst. The synthesized CoOOH·CoOx/P–C3N5 composite shows the characteristics of high photoelectric separation efficiency and low carrier recombination rate. DFT calculation and XPS revealed that P replaced the C atoms in g-C3N5 and interact with the Co atom to form an electron transport channel, showing P-dependent co-catalytic activity. The CoOOH·CoOx cocatalyst accelerated the electron transfer process of P–C3N5 while inhibiting the recombination of carriers and improving the photocatalytic reaction efficiency. The advantages of this strategy were verified by the degradation of TC, and the reaction rate of the obtained material was 59.6 times higher than that of pure g-C3N5. Using this strategy, the photoelectric separation efficiency was simultaneously enhanced, and then the fast recombination of the g-C3N5 carriers was effectively suppressed.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2024
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IF 5.8
Yunfei Sun,Yaping Wang,Yun Chen,Junchao Qian,Feng Chen,Zelong Zhou,Chaoya Han,Yu Shi,Xiaowang Lu,Chaoying Ni
Bisphenol A (BPA), a prevalent organic pollutant found in wastewater environment, is notorious for its resistance to natural degradation, raising significant ecological and human health concerns. In this study, a “signal-on” photoelectrochemical aptasensing system was designed for detecting BPA in real water samples with high specificity and sensitivity. One-dimensional (1D) β-FeOOH nanobelts were synthesized on a two-dimensional (2D) porous carbon nitride (g-C 3 N 4 ) through an in-situ growth procedure. The β-FeOOH/g-C 3 N 4 nanocomposites demonstrated superior photoelectric conversion efficiency due to several factors: (i) The 1D nanobelt-like structure of β-FeOOH shortens the charge transfer path within the nanocomposite, enabling directional and rapid migration of photoinduced charges from the interior to the surface. (ii) β-FeOOH possesses strong visible absorption capabilities, enhancing the utilization of g-C 3 N 4 under photoexcitation, resulting in the generation of numerous photo-induced carriers. (iii) The in-situ formation of the β-FeOOH/g-C 3 N 4 heterojunction establishes an intimate interfacial contact, facilitating the rapid separation and transfer of charges between β-FeOOH and g-C 3 N 4 . A photoelectrochemical aptasensing platform based on the photoactive material of β-FeOOH/g-C 3 N 4 detects BPA with reduced photocurrent owing to the presence of BPA-aptamer macromolecules on the electrode surface. This BPA detection system exhibits excellent linearity over a wide concentration range from 10 pM to 10 nM, with high sensitivity (a detection limit of 3.5 pM), stability, specificity, and repeatability. Furthermore, this research offers a straightforward and rapid sensing platform for monitoring BPA enriched water environments.
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Materials Horizons
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2024
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IF 12.2
Saijun Wu,Minglong Yan,Yinghao Wu,Yangmin Wu,Xijian Lan,Jianjun Cheng,Wenjie Zhao
Inhibiting the adhesion and growth of marine microorganisms through photocatalysis is a potentially efficient and environmentally friendly antifouling strategy. However, the undesired “shading effect” caused by resin coatings and microbial deposition reduces the utilization of the catalysts and leads to a failure in the antifouling active substance on the coating surface. Here, we successfully developed a composite coating (DPC-x) combining g-C3N4 nanosheet (g-C-NS) photocatalysts with degradable green poly-Schiff base resins, which integrates the dual functions of enhanced dynamic self-renewal and photocatalytic antibacterial activities towards long-term anti-biofouling. The controllable and complete degradability of the poly-Schiff base polymer chains and the self-renewal mechanism of the DPC-x coating exposed the internal g-C-NS, which provided a constant stream of photocatalytic reactive interfaces for 100% utilization and release of the photocatalysts. g-C-NS were homogeneously dispersed in the degradable resin coating, significantly enhancing and adjusting the self-renewal rate of the poly-Schiff base resin coating in visible light. The degradation reaction rate of DPC-0.2 (20 wt% g-C-NS) was 40 times that of DPC, thus improving the capabilities of surface self-renewal and fouling-release. Due to the synergistic antifouling mechanism of the efficient antibacterial properties and the enhanced degradation/self-renewal, the antimicrobial rates of DPC and DPC-0.2 were 94.58% and 99.31% in the dark, and 98.2% and 99.87% in visible light. DPC-x has excellent all-weather antimicrobial efficacy and could offer a new perspective on eco-friendly marine antifouling strategies.
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高影响因子
FUEL
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2025
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IF 7.5
Sheng-Zhe Zhao,Rui-Dong Shi,Guo-Tao Xiang,Yong-Da Hu,Jin-Ju Chen
The system of photocatalytic fuel cells (PFC) emerges as a significant innovation within the realm of energy conversion technologies, harnessing the potential of organic waste to produce electrical energy. In this study, we propose a novel approach for simultaneous electricity production and pollutant removal using a PFC system, which consists of Bi 2 O 3 /TiO 2 heterojunction nanotubes modified by g-C 3 N 4 as photoanode materials. The g-C 3 N 4 /Bi 2 O 3 /TiO 2 (CBT) heterostructure possesses a large specific surface area, improved visible light absorption, and enhanced photogenerated carrier separation capability. The morphology, composition, crystal structure, and optical properties of the synthesized CTB were characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and UV–Vis diffuse reflectance spectroscopy (DRS). Using tetracycline hydrochloride as the target pollutant, the photocatalytic degradation performance of the CBT heterostructure is 3.2 times higher than that of pure TiO 2 nanotubes. Furthermore, the PFC system consisting of CBT as photoanode has a significant improvement in pollutant degradation and current output when compared with the PFC with pure TiO 2 . This study presents a cost-effective approach for organic waste treatment and simultaneous electricity production.
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Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Chaolong Liu,Yadan Guo,Shuaihang Li,Keng Xuan,Yaoping Guo,Jun Li,Xuegang Wang,Xiaomeng Li,Zhongkui Zhou
Photocatalytic reduction of uranium(VI) via g-C 3 N 4 is a promising and efficient method for the recovery of radioactive uranium contamination from wastewater. In this work, the mesoporous sulfur-doped g-C 3 N 4 @attapulgite composite was first synthesized via a two-step hydrothermal-roasting method with (NH 4 ) 2 S 2 O 8 as the sulfur source and attapulgite as the supporter, respectively. As expected, the recovery efficiency of uranium(VI) using S-doped g-C 3 N 4 was 1.80 times higher than that of g-C 3 N 4 . Additionally, compared to S-doped g-C 3 N 4 , the mesoporous S-doped g-C 3 N 4 @attapulgite composite exhibited further improved photocatalytic efficiency and stability. The experimental results further showed the uranium(VI) was quickly eliminated within 20 min by mesoporous S-doped g-C 3 N 4 @attapulgite, and the recovery rate of which remained at 88.4 % even after seven cycles. According to the XPS results and trapping experiments, the excellent uranium(VI) recovery and stability can be attributed to the adsorption capacity of attapulgite and the e - reduction from sulfur doping g-C 3 N 4 , respectively. This result contributes to understanding the enhanced photocatalytic reduction mechanism of uranium(VI) and to achieving the high-efficiency recovery of uranium from wastewater using the mesoporous S-doped g-C 3 N 4 @attapulgite composite.
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JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2025
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IF 1.9
Zheng’nan Sun,Zhong’cheng Luo,Yong’hui Wang,Yi’hai Yang,Guo’lin Jing,Ming’xing Bai
In this paper, amino carbon quantum dots (NCACQDs) were synthesized from aspartic acid and citric acid by pyrolysis method, and the nanocomposite pour point depressant EVAM-g-NCACQDs was prepared by grafting NCACQDs with modified ethylene vinyl acetate copolymer (EVAM) by solution method. The improvement effect and mechanism of EVAM-g-NCACQDs on the low-temperature fluidity of wax oils were investigated by combining the evaluation methods of pour point determination, rheological analysis, and polarized light microscopy. The experimental results showed that when the doping amount of NCACQDs was 0.5 wt% of the mass of EVAM, the addition of 500 ppm of EVAM-g-NCACQDs could reduce the pour point of the wax oil from 34 °C to 11 °C, and the viscosity of the wax oil was only 48 mPa·s at 20 °C, which further reduced the pour point of the wax oil by 8 °C compared to that of the wax oil added with the same dosage of EVAM, and the viscosity was reduced by 94.27%.Polarized light microscopy showed that the wax crystals with EVAM-g-NCACQDs formed a regular and tight petal structure with clearer boundaries and homogeneous dispersion, which allowed the oil-phase flow space to be fully released at low temperatures, thus significantly improving the low-temperature fluidity of the wax oils.
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Petroleum Science
·
2024
·
IF 6
Yi-Hai Yang,Li-Na Zhang,Zheng-Nan Sun,Ming-Xing Bai,Guo-Lin Jing,Yang Liu,Xiao-Yan Liu
Modified ethylene-vinyl acetate copolymer (EVAM) and amino-functionalized nano-silica (NSiO 2 ) particles were employed as the base materials for the synthesis of the nanocomposite pour point depressant designated as EVAM-g-NSiO 2 . This synthesis involved a chemical grafting process within a solution system, followed by a structural characterization. Moreover, combining macro-rheological performance with microscopic structure observation, the influence of the nanocomposite pour point depressant on the rheological properties of the model waxy oil system was investigated. The results indicate that when the mass ratio of NSiO 2 to EVAM is 1:100, the prepared EVAM-g-NSiO 2 nanocomposite pour point depressant exhibits excellent pour point reduction and viscosity reduction properties. Moreover, the nanocomposite pour point depressant obtained through a chemical grafting reaction demonstrates structural stability (the bonding between the polymer and nanoparticles is stable). The pour points of model waxy oils doped with 500 mg/kg ethylene-vinyl acetate copolymer (EVA), EVAM, and EVAM/SiO 2 were reduced from 34°C to 23, 20, and 21°C, respectively. After adding the same dosage of EVAM-g-NSiO 2 nanocomposite pour point depressant, the pour point of the model wax oil decreased to 12 °C and the viscosity at 32 °C decreased from 2399 to 2396.9 mPa·s, achieving an impressive viscosity reduction rate of 99.9%. Its performance surpassed that of EVA, EVAM, and EVAM/SiO 2 . The EVAM-g-NSiO 2 dispersed in the oil phase acts as the crystallization nucleus for wax crystals, resulting in a dense structure of wax crystals. The compact wax crystal blocks are difficult to overlap with each other, preventing the formation of a three-dimensional network structure, thereby improving the low-temperature flowability of the model waxy oil.
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DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Yundong Qian,Tengda Lu,Ke Liu,Guangkai Lu,Jie Xiao,Xiaoyuan Zeng
The oxygen reduction reaction (ORR) electrocatalyst plays an important role in various renewable energy applications and energy conversion and storage fields. The design and synthesis of ORR catalysts with high activity, great stability, and low cost is a harsh challenge. Transition metal catalysts are deemed to be one of the promising alternatives to traditional Pt-based catalysts for oxygen reduction reactions. In this study, a nickel metal nanoparticle encapsulated by nitrogen-doped carbon tube composites (Ni/N-C-t) are fabricated by regulating the calcining temperature and using g-C 3 N 4 as precursor in the presence of nickel nitrate. The Ni/N-C-800 catalyst which is calcined at 800 °C exhibits the largest specific surface area (152.1 m 2 ·g −1 ), abundant defects, mesoporous structures and more active reaction sites, demonstrating excellent ORR performance (half-wave potential of 0.80 V) and good stability (current retention rate of 64 % after 66 h longevity test). The attributes of high content of Ni-N x , graphitic nitrogen, and pyridine nitrogen and largest specific surface area endow the catalyst of Ni/N-C-800 affluent reaction active sites and outstanding conductivity, thus boosting the ORR electrocatalytic performance. This study demonstrates a useful inspiration for the preparation of advanced oxygen reduction reaction electrocatalysts with g-C 3 N 4 derivatives.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Fanwei Meng,Chao Qu,Lanyang Wang,Decai Yang,Zezhong Zhao,Qing Ye
Photocatalytic CO 2 reduction technology plays a significant role in the energy and environmental sectors, highlighting the necessity for developing high-efficiency and stable catalysts. In this study, a novel photocatalyst, x NiCo 2 O 4 /CN ( x = 1, 3, and 5 wt%), was synthesized by depositing zeolitic imidazolate framework-67 (ZIF-67)-derived nickel cobaltate (NiCo 2 O 4 ) hollow nanocages onto porous graphitic carbon nitride ( g -C 3 N 4 , CN) nanosheets for photocatalytic CO 2 reduction. Under visible light irradiation, the resulting 3NiCo 2 O 4 /CN photocatalyst demonstrated exceptional CO yields of up to 2879.5 μmol g −1 h −1 , surpassing those of NiCo 2 O 4 and CN alone by factors of 3.3 and 11.6, respectively. The introduction of hollow NiCo 2 O 4 nanocages increased the specific surface area of the material and enhanced the number of active sites, while strengthening visible light absorption. The creation of a built-in electric field, induced by the Fermi level difference between the two materials, was confirmed through ultraviolet photoelectron spectroscopy (UPS) characterization. This resulted in the formation of a Z-scheme heterojunction, significantly enhancing the separation and migration of photogenerated charge carriers. Notably, 3NiCo 2 O 4 /CN exhibits excellent stability during long-term photocatalytic reactions, ensuring reliable performance for practical applications. This study offers novel insights and methodologies for developing efficient photocatalytic CO 2 reduction catalysts.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2025
·
IF 5.1
Liu Ouyang,Huihu Wang,Lizhong Duan,Jingle Zhang,Shenghao Jiang,Yu Xiong,Chenhuinan Wei,Xing Xiang,Yun Zhao,Qianyu Wang
Tetracycline (TC), a widely detected aquatic pollutant, poses significant ecological risks, necessitating the development of effective remediation strategies. Photocatalytic degradation, which converts TC into harmless CO 2 and H 2 O, offers a promising eco-friendly solution. This study successfully synthesized a novel 2D/3D g-C 3 N 5 /BiVO 4 (N-CN/BiVO 4 ) S-scheme heterojunction via a hydrothermal method. The optimized 5 % N-CN/BiVO 4 exhibited exceptional performance in activating the Fe 2+ /PMS system under visible light, achieving a 96.8 % TC removal efficiency with an apparent rate constant 4.4 times higher than that of BiVO 4 . Mechanistic studies, including ultraviolet photoelectron spectroscopy (UPS) and valence band X-ray photoelectron spectroscopy (VB-XPS), confirmed the S-scheme interfacial charge transfer pathway. Furthermore, radical quenching experiments revealed that the enhanced photocatalytic activity originated from the synergistic contribution of multiple reactive species ( OH, SO 4 − , O 2 − , h + , and 1 O 2 ), validating both the efficient activation of Fe 2+ /PMS and the proposed S-scheme charge transfer mechanism. This work presents an innovative approach for high-performance pollutant degradation by coupling an S-scheme heterojunction with the Fe 2+ /PMS activation system.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Xiaoyou Cui,Xinnan Kang,Chuhan Zhang,Yanan Gao,Yajie Wang,Bin Liu
To address the critical bottlenecks of low carrier separation efficiency and insufficient redox potential in nitrogen-rich graphitic carbon nitride (g-C 3 N 5 ), this study developed an environmentally friendly MoO 3-x /CN composite material enriched with oxygen vacancies via a synergistic hydrothermal-calcination protocol. In photocatalytic degradation experiments, the MoO 3-x /CN-0.5 composite exhibited ultra-rapid degradation kinetics and broad-spectrum applicability, achieving degradation rates of 86.91 % for methyl orange (MO), 81.92 % for methylene blue (MB) and 97.11 % for rhodamine B (RhB) within 10 min, significantly outperforming other reported photocatalysts. Distinguishing from other photocatalysts, the exceptional photocatalytic degradation efficiency and broad-spectrum applicability of the MoO 3-x /CN-0.5 composite originate from three synergistic factors: enhanced visible-light absorption, a rationally designed Z-scheme heterojunction, and N-Mo bonds at the phase interface. These structural features synergistically enable efficient electron-hole pairs dissociation, improve the material's redox capability, and preserve structural integrity. This work provides a facile strategy for the controlled synthesis of g-C 3 N 5 -based heterojunctions and expands their application potential for highly efficient photocatalytic degradation.
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