INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2014
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IF 2.235
Fa-tang Li,Ya-bin Xue,Bo Li,Ying-juan Hao,Xiao-jing Wang,Rui-hong Liu,Jun Zhao
Mesoporous γ-Al2O3 with high surface area (159 m2/g) is prepared via a precipitation method. The as-synthesized Al2O3 exhibits optical absorption ability in the ultraviolet region and is used as the active component to be combined with g-C3N4 to form effective heterostructured photocatalysts. This heterojunction structure is confirmed by X-ray diffraction, scanning electron microscopy, element map, transmission electron microscopy, high-resolution transmission electron microscopy, Fourier transform infrared, and X-ray photoelectron spectroscopy measurements. The photocatalytic performances of the composites are evaluated by the degradation of rhodamine B (RhB) and methyl orange (MO). Among the prepared photocatalysts, 2g-C3N4:1Al2O3 (weight ratio) exhibits the highest photocatalytic activity, the reaction rate constant of which is 2.5 and 3.7 times that of pure g-C3N4 in degradation of RhB and MO, respectively. The enhancement in activity of heterojunctions is ascribed to their high specific surface areas, excellent adsorption abilities for dyes, and efficient transfer of photogenerated electrons from the lowest unoccupied molecular orbital of g-C3N4 to the defect sites of γ-Al2O3.
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CATALYSIS TODAY
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2018
·
IF 4.667
Shuanglong Ma,Sihui Zhan,Yuguo Xia,Pengfei Wang,Qianlei Hou,Qixing Zhou
The Ag/ZnO/g-C 3 N 4 composite photocatalyst, which was synthesized by thermal polymerization of a melamine precursor combined with solvothermal reaction, was used as a visible-light-driven biocide toward Escherichia coli ( E. coli ). The Ag/ZnO/g-C 3 N 4 composite displayed considerably increased visible-light-driven bactericidal activity compared to g-C 3 N 4 , Ag/g-C 3 N 4 , and ZnO/g-C 3 N 4 powders. The photocatalytic destruction of E. coli cells was verified by fluorescence-based cell live/dead analysis and SEM. The mechanism of increased bactericidal effect was studied by UV–vis diffuse reflectance spectroscopy, photoluminescence spectroscopy, photocurrent response, and electrochemical impedance spectroscopy (EIS). The enhanced photocatalytic bactericidal effect was attributed to the matching conduction band levels of g-C 3 N 4 and ZnO and the surface plasmon resonance (SPR) effect of Ag nanoparticles, which resulted in enhanced adsorption of visible light, reduced recombination of free charges, and rapid separation and transportation of photogenerated electrons-holes. The disinfection mechanism was investigated using different chemical scavengers and electron spin-resonance spectroscopy (ESR), and indicating the important role of h + and H 2 O 2 . Furthermore, taking into account the bulk availability and better bactericidal effect of Ag/ZnO/g-C 3 N 4 , this work provides a new pathway to develop advanced materials for water disinfection.
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CARBON
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2025
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IF 11.6
Haoyuan Yang,Yichen Wang,Yuhong Cui,Ke Yang,Yuanzhi Jiang,Qian Ye,Yibo He,Xuqing Liu
The synergistic effect of multidimensional nanomaterials is an effective strategy to improve the tribological properties of base oils. Herein, an inorganic-organic nanocomposite comprising zero-dimensional g-C 3 N 4 quantum dots (g-CNQDs) and two-dimensional NUS-2 modified with cetyltrimethylammonium bromide (CCOF) is developed as an additive for oil-based lubricants. When 3.0 wt% g-CNQDs/CCOF is added as a lubricant additive, the average coefficient of friction and wear volume of PAO-10 base oil decrease from 0.172 to 6.21 × 10 5 μm 3 to 0.095 and 1.12 × 10 5 μm 3 , respectively. Moreover, CCOF and g-CNQDs feature abundant oxygen groups that promote adsorption and tribochemical reaction films on worn surfaces. These coherent tribofilms prevent direct surface contact and enhance interfacial interaction. Additionally, g-CNQDs can act as fillers to repair the worn surface, thereby improving lubrication performance. The PAO-10 base oil containing the g-CNQDs/CCOF nanocomposite demonstrates enhanced performance under various loads, frequencies, and temperatures. Additionally, CCOF and g-CNQDs possess plentiful oxygen-containing functional groups that can facilitate the formation of adsorption films and tribochemical reaction films composed of iron oxides and carbonitrides on the worn surface. The continuous and robust tribofilm prevents direct contact between friction pairs and enhances the interaction at the friction interface. Moreover, g-CNQDs can work as fillers to repair worn surface, thereby improving lubrication performance. The PAO-10 base oil containing g-CNQDs/CCOF nanocomposite shows improved performance under various loads, frequencies and temperatures. This work develops a unique g-CNQDs/CCOF nanocomposite as an additive to improve the lubrication performance of lubricant, providing a reference for exploiting novel lubricant additive.
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JOURNAL OF MOLECULAR STRUCTURE
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2026
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IF 4.9
Yupei Chai,Lidan Cao,Yingxing Zhang,Junhong Wang,Duo Zhang,Cunfang Liu
A smart anti-corrosion and self-healing coating BTA@MSNs/g-C 3 N 4 @PDA was prepared base on mesoporous silica nanoparticles (MSNs) and graphite-phase carbon nitride (g-C 3 N 4 ) composites as nano-containers and loaded the corrosion inhibitor benzotriazole (BTA), as well as wrapped polydopamine (PDA). The structure and properties of the composites were characterized by SEM, TEM, EDS, FT-IR, XPS, XRD and N 2 physical adsorption. The release behaviors of BTA were tested by UV–Vis spectroscopy. Then these prepared materials were mixed to epoxy resin E-51 (EP) and cured to obtaining three protective coatings of MSNs/g-C 3 N 4 -EP, BTA@MSNs/g-C 3 N 4 -EP, and BTA@MSNs/g-C 3 N 4 @PDA-EP. These coatings were used as working electrodes to investigate their anti-corrosion and self-healing properties via electrochemical impedance spectroscopy (EIS), salt spray test, SEM and EDS. Test results indicate that the smart coatings presented better corrosion-resistant and self-healing performance. After being soaked in 3.5 % NaCl solution for 30 days, the |Z| 0.01Hz value of the coating BTA@MSNs/g-C 3 N 4 @PDA-EP could still reached to 10 6 , two orders of magnitude higher than that of the coating MSNs/g-C 3 N 4 -EP. Furthermore, the self-healing mechanism of these coatings was also better explored. In summary, this study will provide feasible paths and guidance for the preparation of intelligent anticorrosive self-healing new materials.
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GREEN CHEMISTRY
·
2020
·Vol. 22
·期 21
·7552-7559
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IF 9.48
Bing-Cai He,Chao Zhang,Pei-Pei Luo,Yu Li,Tong-Bu Lu
Photocatalytic CO2 reduction coupled with water oxidation provides a fascinating approach to mitigating the issues of global warming and energy shortage. Herein, a direct Z-scheme heterojunction of Co1-C3N4@α-Fe2O3 comprising a g-C3N4-supported single-atomic Co site catalyst (denoted as Co1-C3N4) and α-Fe2O3 nanorod arrays is fabricated for efficient CO2 reduction. A CO production rate of 14.9 μmol g−1 h−1 with a high CO selectivity (>99%) is achieved under visible-light irradiation without any sacrificial agents other than water. Time-resolved photoluminescence (TRPL) analysis reveals that both the Z-scheme mechanism and the single-atomic Co sites contribute to the prolonged lifetime of the photo-induced excitons. Moreover, the formation of the Z-scheme heterojunction would lead to an altered charge density of the single-atomic Co sites. In situ diffuse reflectance infrared Fourier-transform spectroscopy and anion adsorption measurements reveal that the key intermediate CO2− could be efficiently stabilized by the positively charged Co sites in Co1-C3N4@α-Fe2O3, thus enhancing the CO2 reduction performance. This work offers a new direction for the rational design of single-atomic site catalysts in artificial photosynthesis.
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TURKISH JOURNAL OF CHEMISTRY
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2022
·Vol. 44
·期 2
·393-408
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IF 1.151
WU YIBO,LI FUXIANG,XUE JIANWEI,LV ZHIPING
A series of alkylorganotin-based catalysts (Sn-g-C$_{3}$N$_{4}$/AC) was prepared by wet impregnation in ethanol using different g-C$_{3}$N$_{4}$ precursors and alkylorganotin compounds. The structure, texture, surface composition, and adsorption properties of the as-prepared catalysts were extensively characterized. Then, the obtained samples were evaluated for their catalytic performance in hydrochlorination of acetylene. The results provided by the X-ray photoelectron spectroscopy, acetylene temperature-programmed desorption, and HCl adsorption confirmed the nature of the active sites (i.e. Sn-N$_{x}$ ) involved in the reactant adsorption, and hence in the improved catalytic performance. These active sites were also related to the improved lifetime of alkylorganotin-based catalysts in the hydrochlorination of acetylene. At a constant reaction temperature of 200 °C with an acetylene gas hourly space velocity (C2H2-GHSV) of 30 h$^{-1}$, Sn-g$_{1}$ -C$_{3}$N$_{4}$/AC-550 exhibited the highest acetylene conversion (~98.0%) and selectivity toward the vinyl chloride monomer (>98.0%). From the catalytic test results, it was reasonably concluded that the hexamethylenetetramine is the most suitable N precursor, as compared to the dicyandiamide and urea, to prepare high-performance catalysts. From the BET specific surface area of fresh and used catalysts, it was suggested that, in contrast to dicyandiamide and urea, hexamethylenetetramine could delay the deposition of coke on alkylorganotin-based catalysts, which is reflected by the extended lifetime.
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Journal of Water Process Engineering
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2026
·
IF 6.6
Siting Pan,Xuan Wu,Xiaoming Li,Jiangfu Zheng
OVs-UCN was synthesized by oxygen pre-doping and N 2 calcination. • OVs accelerated charge separation and interfacial transfer. • CIP removal reached nearly 99% within 60 min in the PMS/Vis system. • 1 O 2 -dominated non-radical oxidation governed CIP degradation. • OVs-UCN showed real-water applicability and reduced effluent toxicity. Developing green and pollution-free high-performance photocatalysts remains the key to achieving efficient pollutant degradation. In the study, we developed an oxygen pre-doping followed by calcination induced nitrogen elimination strategy to synthesize oxygen-vacancies ultrathin g-C 3 N 4 (OVs-UCN). The tunable layered structure substantially shortens the migration pathway of electrons from the interior in the catalyst to its surface. Importantly, construction of OVs effectively enhances visible-light absorption and modulates the band structure for promoting the photogenerated carriers. Experimental results demonstrate that OVs-UCN removes nearly 99% of ciprofloxacin (CIP) within 60 min, exhibiting significantly superior photocatalytic activity compared with unmodified g-C 3 N 4 . Quenching experiments reveal that CIP degradation is dominated by the synergistic effects of singlet oxygen, holes, and superoxide radical. Moreover, OVs-UCN retains excellent applicability across a wide pH range and in various real-water matrices. This work provides new perspectives for the rational design of heterogeneous photocatalysts and emphasizes the practical promise of vacancy modification strategy for antibiotic wastewater remediation. Download: Download high-res image (133KB) Download: Download full-size image
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Nanomaterials
·
2026
·Vol. 16
·期 16
·984
·
IF 4.8
Yangfan Du,Guanglong Jing,Keyi Han,Xin Zhang,Liang Hou,Yong Li
The global demand for hydrogen peroxide (H2O2) continues to increase, and photocatalytic H2O2production is regarded as a promising alternative technology due to its mild, safe, and environmentally friendly characteristics. ZnIn2S4has demonstrated promising application potential in photocatalytic H2O2production owing to its unique two-dimensional layered structure and broad spectral response. However, its performance is severely limited by rapid charge recombination and sluggish charge migration. To address this challenge, a ZnIn2S4/C3N4S-scheme heterojunction was successfully constructed via a simple oil-bath method by assembling ZnIn2S4nanoflowers on C3N4nanosheets. Systematic structural characterizations and performance evaluations demonstrate that the construction of the S-scheme heterojunction effectively promotes the spatial separation and surface migration of photogenerated charge carriers, thereby significantly enhancing photocatalytic activity. Under optimal conditions, the ZIS/CN-10 sample (C3N4to ZnIn2S4mass ratio of 10%) achieves the highest photocatalytic H2O2production rate of 825.8 μmol g−1h−1. This work provides new insights and theoretical guidance for the rational design of efficient and stable ZnIn2S4-based photocatalysts.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
·
IF 5.4
Tianguang Liang,Lijing Wang,Pengnian Shan,Yuhan Wang,Pengyu Kang,Yi Cai,Bo Xiong,Feng Guo,Weilong Shi
Against the backdrop of global efforts to develop sustainable hydrogen fuels, semiconductor-based photocatalytic hydrogen production suffers from insufficient light absorption and inefficient charge separation. Rational structural regulation of photocatalysts is thus required to improve hydrogen evolution performance. Herein, laver-derived biochar was synthesized via calcination and ultrasonic-assisted impurity removal, and then co-calcined with urea through high-temperature polymerization to fabricate carbon-doped black g-C 3 N 4 (BCN) with excellent photothermal performance. Upon 100 s of full-spectrum irradiation from a 300 W xenon lamp, BCN-1.0 achieves a surface temperature of 72.4 °C, much higher than the 48.7 °C of pristine yellow g-C 3 N 4 (YCN). Irradiation endows BCN with improved light-harvesting and heat-release capabilities, which promotes non-radiative relaxation, elevates local surface temperature, and yields a photothermally-assisted hydrogen evolution rate of 9.58 mmol g −1 h −1 , 1.5 times that of YCN (6.39 mmol g −1 h −1 ). The reaction rate hits 15.56 mmol g −1 h −1 when the solution temperature is raised to 45.5 °C. Photoluminescence (PL) and time-resolved photoluminescence (TRPL) characterizations verify that structural modulation of g-C 3 N 4 generates abundant defect sites that serve as non-radiative recombination centers. The energy of trapped charge carriers dissipates through phonon scattering and local lattice vibrations, which suppresses fluorescence emission, enhances intramolecular vibration and non-radiative relaxation, drastically increases local surface temperature, and accelerates hydrogen evolution. This work delivers a pioneering investigation on the application potential of black g-C 3 N 4 for photothermal-assisted photocatalytic hydrogen evolution. Download: Download high-res image (225KB) Download: Download full-size image
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JOURNAL OF NANOPARTICLE RESEARCH
·
2026
·Vol. 28
·期 7
·180
·
IF 3.5
Ali Zubair,Khan Iltaf,Wang Chunjuan,Ali Farman,Mujahid Laiba,Zaman Saeed,Arif Umar,Chen Xiaohu,Ali Nisar
Dyes represent a major class of water pollutants worldwide, posing significant threats to aquatic ecosystems and the environment due to their discharge into industrial wastewater without treatment. Thus, before releasing organic colors and their derivatives into rivers, they must be degraded using heterogeneous photocatalysts. Similarly, burning fossil fuels releases massive amounts of CO 2 into the atmosphere, exacerbating global warming and environmental devastation. Herein, we report the design and fabrication of Ag/CdSe/g-C 3 N 4 (i.e., Ag/CdSe/CN) as a highly efficient photocatalyst for the degradation of Toluidine Blue dye and CO 2 conversion to value-added products. X-ray diffraction analysis confirmed the crystalline nature of the as-synthesized photocatalyst. SEM and TEM analysis revealed that Ag and CdSe nanoparticles are uniformly dispersed on the surface of a 2D sheet-like structure for CN. The photocatalytic performance of the photocatalysts was explored at different parameters such as dye and photocatalyst doses, pH, and time. The as-fabricated Ag/CdSe/CN photocatalyst revealed exceptional performance for Toluidine Blue dye degradation under visible light irradiation, with a notable 92.3% degradation at pH 13, which is remarkably higher than those of the CdSe/CN, CdSe, and CN photocatalysts. Additionally, the Ag/CdSe/CN photocatalyst revealed outstanding performance for visible light catalytic CO 2 conversion to CH 4 (i.e., 9 μmol g⁻ 1 h⁻ 1 ) and CO (28 μmol g⁻ 1 h⁻ 1 ), in comparison to the reference samples. This work will provide a new route for the design and fabrication of highly efficient photocatalysts for environmental applications. Graphical abstract Graphical abstract showing the design of Ag/CdSe/g-C 3 N 4 nanocomposite for CO 2 conversion and dye degradation
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INORGANIC CHEMISTRY COMMUNICATIONS
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2026
·
IF 5.9
Yue Li,Ping Liu,Xiaoxue Han,Longyu Guo,Haiyan Jiang,Yongchao Ma
A heterojunction with g-C 3 N 4 @Zn/Eu-MOF covalent interface was synthesized. • g-CN@MOF can be used for photocatalytic degradation and fluorescence detection of ofloxacin. • Efficient removal of ofloxacin in milk by g-CN@MOF foam. • g-CN@MOF can detect ofloxacin residues in milk through smartphone-assisted color recognition. Ofloxacin (OFL) is widely used in medicine and animal husbandry, and its residues in milk raise substantial food-safety concerns. Herein, a dual-functional covalently coupled g-C 3 N 4 @Zn/Eu-MOF composite (g-CN@MOF) was constructed through a one-pot hydrothermal route. FTIR and XPS analyses indicated the formation of C N C O linkages between g-C 3 N 4 and the MOF, yielding an interfacially coupled type-II heterojunction that promoted charge separation. The optimized g-CN@MOF-30 achieved 69.21% removal of 10 mg L −1 OFL within 120 min under visible light, with •O 2 − and •OH identified as the dominant reactive species. Meanwhile, the fluorescence intensity ratio F 440 /F 595 showed a linear response to OFL over the range of 0–100 μM, affording a detection limit of 0.011 μM through an IFE-dominated ratiometric sensing mechanism. After immobilization in sodium alginate foam, the composite exhibited convenient recyclability and enabled OFL removal from pretreated milk samples, while smartphone-based RGB analysis provided rapid visual semi-quantification with recoveries ranging from 100.3% to 109.9%. Download: Download high-res image (269KB) Download: Download full-size image
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2026
·
IF 4.4
Jiang Meng,Jiayang Wu,Xiaoning Lu,Mengchen Zeng,Shunxu Yang,Junling Yang,Shuping Li,Meizi Zhou,Wanxun Li,Mingchao Zhu,Guangcan Zhu
NH₄Cl gas template creates hierarchically porous g-C₃N₄ via one-step microwave synthesis. • 10 g-GCN achieves 2.35× increased surface area (26.09 m 2 g −1 ) and 88% CFS degradation. • Porous structure shortens charge migration paths and enhances mass transfer. • O₂ − dominates the degradation; ·OH plays a larger auxiliary role than in etching systems. • ECOSAR warns of high-toxicity intermediates requiring complete mineralisation. Graphitic carbon nitride (g-C 3 N 4 ) is a promising metal-free photocatalyst for water purification, but its low surface area and poor mass transfer in densely stacked layers limit practical performance. Herein, a microwave-assisted gas-template strategy using ammonium chloride (NH 4 Cl) was employed to prepare hierarchically porous g-C 3 N 4 nanosheets (GCN). During microwave-driven polycondensation of melamine, NH 4 Cl decomposed in situ to release NH 3 and HCl gases, which simultaneously disrupted the lamellar stacking and generated abundant mesopores without requiring a separate solid-template removal step. The optimised 10 g-GCN exhibited a specific surface area of 26.09 m 2 g −1 , 2.35 times higher than pristine g-C 3 N 4 , and a pore volume of 0.190 cm3 g-1. Under visible-light irradiation, 10 g-GCN degraded 88% of cefotaxime sodium within 60 min, with an apparent pseudo-first-order rate constant of 0.03242 min −1 , 4.16 times that of bulk g-C 3 N 4 . The enhanced activity is correlated with the porous nanosheet architecture, which is associated with shortened charge-migration distances, enhanced pollutant diffusion, and increased accessibility of active sites. Radical-trapping experiments confirmed superoxide radicals (·O 2 − ) as the dominant reactive species, while hydroxyl radicals (·OH) may be generated as a minor supplementary species through the electron-driven cascade reduction of O 2 . The degradation efficiency decreased from 88% to 79% after five cycles (approximately 90% of the initial efficiency retained), and the catalyst showed broad-spectrum degradation towards cephalosporin and non-cephalosporin antibiotics. LC-MS identified pathways including de-esterification, side-chain cleavage, beta-lactam ring opening, and fragmentation towards mineralisation. TOC confirmed 28.0% mineralisation, while ECOSAR indicated that some intermediates may still exhibit elevated aquatic toxicity, highlighting the need for sufficient mineralisation in practical treatment scenarios.
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危险品化学品经营许可证（带存储）