Surfaces and Interfaces
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2026
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IF 6
Roshni Rahman,Mingsheng Luo
NiO-loaded g-C₃N₄ photocatalysts (1.5–13.5 wt %) were successfully synthesized. • 5.5NiO/g-C₃N₄ achieved the highest activity with 98 % CR degradation in 1 h. • NiO incorporation shifted the CB from −0.58 V to −0.68 V, improving charge transfer. • Band gap decreased from 2.91 eV (GCN) to 2.80 eV (5.5NiO/GCN). • Co-contaminants (NaCl, Na₂SO₄) reduced degradation efficiency to 80-93 %. In this work, NiO with various mass percentages (1.5%, 3.5%, 5.5%, 7.5%, 9.5%, 13.5%) was loaded on GCN to improve the photocatalytic degradation of CR and BPA. Among all prepared samples, the 5.5NiO/GCN composite displayed the highest photocatalytic activity, achieving 98% degradation of CR and 91% degradation of BPA within 1 h. Mott-Schottky analysis revealed a conduction band potential of -0.58 V for pristine GCN and -0.68 V for the optimized 5.5NiO/GCN composite. Band gap energies obtained from the Tauc plot were 2.91 eV for GCN and 2.80 eV for 5.5NiO/GCN, confirming that NiO incorporation narrowed the band gap and enhanced photocatalytic properties. Furthermore, the influence of co-existing pollutants was also investigated. Inorganic salts (NaCl and Na₂SO₄) reduced degradation efficiencies to 93% for CR and 84% for BPA, whereas organic co-contaminants (PVA and acetone) decreased them to 80% and 77%, respectively, under identical conditions. Total organic carbon (TOC) analysis demonstrated 91% mineralization for CR and 87% for BPA over 1 h, indicating that the photocatalyst achieved significant mineralization, not just superficial degradation. Overall, these findings establish 5.5NiO/GCN as a highly efficient photocatalyst for both dye and organic pollutant removal and emphasize the critical role of co-contaminants in real wastewater scenarios. Download: Download high-res image (257KB) Download: Download full-size image
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INORGANIC CHEMISTRY COMMUNICATIONS
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2026
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IF 5.9
Zongsheng Chen,Yanxi Ma,Hui Kang,Ting Liu,Hao Song,Ludan Chen,Yingluo He
The development of highly active catalysts for the catalytic conversion of oxygen-containing aromatics in lignite under mild conditions is of crucial importance for the production of clean liquid fuels. In this study, an in situ nitrogen-doped carbon-coated Ni@C/g-C 3 N 4 catalyst was fabricated. The abundant lone-pair electrons on nitrogen atoms within the g-C 3 N 4 support can coordinate with nickel, facilitating the migration of electrons toward the nickel surface. This electron transfer process favors the formation of Ni δ+ active sites with low electron cloud density, thereby enhancing the hydrogenation catalytic activity of the catalyst. The catalyst exhibited exceptional performance in lignite hydrodeoxygenation (HDO): under conditions of 80 °C, 1.5 MPa H 2 , and a reaction time of 1.5 h, 100% conversion of the lignite model compound benzyl phenyl ether (BOB) was achieved. Furthermore, the catalyst demonstrated remarkable hydrodeoxygenation activity, with high selectivity toward various oxygen-containing model compounds, including methyl nonanoate and 2,6-dimethylphenol. The optimal catalyst was applied to the catalytic conversion of the soluble portion (SP) of Naomaohu coal (NMHC). Results indicated that, compared with the SP, the hydrogenated soluble products from catalytic hydrogenation conversion (SP CHC ) showed a significant increase in the variety and quantity of aromatic and alkane compounds, while the relative contents of phenols, alcohols, esters, and ethers were reduced. These findings fully confirm that the Ni@C/g-C 3 N 4 catalyst can effectively cleave C C and C O bonds during the hydrogenation conversion of the SP, providing theoretical guidance for the conversion of lignite into high-quality clean liquid fuels.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2025
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IF 7.8
Lei Hu,Yuxuan Tian,Ning Ding,Hong Liu
In this study, iron-doped molybdenum disulfide (FeMoS 2 ) was hydrothermally synthesized and subsequently coupled with calcined graphitic carbon nitride (g-C 3 N 4 ) to construct a heterojunction . Comprehensive characterization confirmed the stable crystalline structure of the composites and the formation of robust interfacial coupling, which facilitated efficient photogenerated charge separation. Furthermore, UV-Vis diffuse reflectance spectroscopy revealed a significant extension of the visible-light absorption edge compared to pristine FeMoS 2 , with the bandgap narrowing to 1.99 eV. Under optimized conditions (0.6 g/L catalyst dosage, 1.0 mM peroxydisulfate (PDS), pH 6), the FeMoS 2 /g-C 3 N 4 /PDS system achieved 88 % Chlorella vulgaris inactivation in 60 min under visible light, retaining more than 60 % efficiency after five cycles. Mechanistic investigations revealed that superoxide radicals (·O 2 - ) and photogenerated holes (h + ) synergistically inactivated Chlorella via reactive oxygen species (ROS)-induced membrane peroxidation and antioxidant system disruption. Algal physiological assays and microscopic imaging further corroborated that photocatalytically generated ROS compromised cellular membrane integrity and induced chloroplast degradation.
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JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Hengli Qian,keyuan Zhang,Chao Xie,Qidong Hou,Ruite Lai,Guanjie Yu,Tianliang Xia,Xinyu Bai,Meiting Ju
To achieve efficient degradation of pharmaceuticals and personal care products (PPCPs), the g-C₃N₄-WO₃@FePc system was in-situ constructed using a calcination method, with g-C₃N₄-WO₃ serving as the support matrix. This approach effectively resolved the issue of FePc aggregation and self-degradation in aqueous environments. The g-C₃N₄-WO₃@FePc catalyst demonstrated excellent performance in the photo-Fenton degradation of acetaminophen (ACE), achieving over 90% degradation within just 20 minutes under simulated sunlight. The catalyst's superior performance is attributed to the synergistic effects between the reaction centers. The π-π conjugation between g-C₃N₄-WO₃ (the photocatalytic center) and FePc (the Fenton catalytic center) facilitates the transfer of photo-generated electrons from the photocatalytic center to the Fenton catalytic center, enabling rapid regeneration of Fe(II) and generating a significant amount of active species (•O₂⁻ and 1 O₂). To validate the stability of the catalytic system, factors such as ionic impurities and water types affecting performance were investigated and analyzed. Additionally, cell toxicity and antimicrobial tests were conducted to evaluate the toxicity of ACE degradation intermediates and the ecological stability of g-C₃N₄-WO₃@FePc, revealing its potential for practical wastewater treatment applications.
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PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Ping Liang,Shuai Shao,Xiaocan Liu,Ziwen Zhang,Dandan Wang,Weiye Yang,Lijian Meng,Junfeng Zhang,Shihua Zhao
This study reports the construction of a g-C₃N₄/ZnTiO₃/BiOI ternary heterojunction photocatalyst for the efficient degradation of organic dyes. The optimized g-C₃N₄/ZnTiO₃/BiOI composite with a mass ratio of 1:1:2 exhibited excellent photocatalytic activity toward Rhodamine B (RhB), achieving nearly complete degradation within 40 min at pH 11, with an apparent rate constant of 0.05114 min⁻¹ . The composite also showed photocatalytic degradation ability toward methylene blue (MB) and methyl orange (MO), as well as satisfactory performance in different real water matrices, demonstrating its broader applicability. Structural and surface analyses confirmed the successful formation of the ternary composite, while BET results indicated that the retained mesoporous structure facilitated reactant diffusion and interfacial mass transfer. UV–vis DRS revealed an extended light absorption range beyond 600 nm, and photoelectrochemical measurements demonstrated reduced charge-transfer resistance and enhanced separation and migration of photogenerated carriers. Radical trapping and EPR analyses identified ¹O₂ and •OH as the dominant reactive species. After five cycles, the RhB degradation efficiency remained above 90%, indicating good stability. Combined with Mott–Schottky measurements, XPS analysis, work-function calculations, Bader charge analysis, and differential charge density results, a ZnTiO₃-mediated dual S-scheme charge-transfer mechanism was proposed. This work provides a feasible strategy for designing efficient ternary heterojunction photocatalysts for dye-contaminated wastewater treatment.
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高影响因子
Journal of Environmental Chemical Engineering
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2026
·Vol. 14
·期 5
·123598
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IF 7.5
Di Li,Huimin Zhu,Yuan Zhang,Shaofei Yang,Ruiyu Zhu,Jiaoe Dang,Fang Song,Jun Zhou
The escalating global energy crisis and environmental pollution has drawn increasing attention. As a green and sustainable alternative, photocatalytic H 2 O 2 synthesis has attracted widespread interest. In this study, we has designed a novel exciton-regulated photocatalyst (Bi@g-C 3 N 4 /ST-NS) by integrating bismuth-doped graphitic carbon nitride with porphyrin-based supramolecular nanostructures (ST-NS). The composite was synthesized through a sequential process involving solvothermal reaction, high-temperature calcination, and solution-phase self-assembly. We systematically investigated its crystal structure, photoelectronic properties, and the mechanistic basis of photocatalytic H 2 O 2 production. Characterization results confirmed the successful incorporation of Bi single atoms into the sixfold cavities of g-C 3 N 4 , forming a p-n heterojunction with ST-NS while preserving the crystallinity of the host matrix. The built-in interfacial electric field not only promoted efficient charge separation but also extended the visible-light absorption range and prolonged the carrier lifetime. Performance evaluations revealed that Bi@g-C 3 N 4 /ST-NS exhibited significantly enhanced H 2 O 2 generation activity compared to pristine Bi@g-C 3 N 4 , with optimal performance achieved at a 10:1 mass ratio. Under visible-light irradiation, the H 2 O 2 concentration reached 1134 μM in the reaction solution, representing a 2.5-fold improvement over Bi@g-C 3 N 4 . Mechanistic studies indicated that the heterojunction facilitated efficient intersystem crossing from singlet to triplet excitons. Rather than following the conventional superoxide radical (·O 2 - ) pathway, these triplet excitons activated ground-state oxygen to generate singlet oxygen ( 1 O 2 ) via resonance energy transfer. The subsequent highly selective two-electron reduction of 1 O 2 yielded H 2 O 2 , effectively circumventing the high-energy barrier steps associated with traditional pathways. This work thus presented a promising strategy for the rational design of high-efficiency photocatalytic systems through exciton regulation.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Pengyao Guo,Yuan Qin,Yujie Fang,Lei Ding
This study presents the rational design of a magnetically recoverable CoFe 2 O 4 /BiVO 4 @g-C 3 N 4 (CFO/BVO@CN) ternary heterojunction for highly efficient levofloxacin (LVFX) degradation via peroxymonosulfate (PMS) activation under visible light. The key innovation lies in the synergistic integration of a unique charge transfer pathway with interfacial M-N (M = Co, Fe, Bi, V) chemical bonding, as unequivocally evidenced by XPS. This atomic-level interfacial engineering creates efficient electron channels that not only promote the spatial separation of photogenerated carriers but also dramatically accelerate the dual redox cycles of metal species (Co 2+ /Co 3+ , Fe 2+ /Fe 3+ ).Crucially, the V 4+ /V 5+ pair functions as an efficient electron shuttle, facilitating the rapid regeneration of PMS-active Co 2+ and Fe 2+ sites and sustaining a high-efficiency catalytic process. Consequently, the optimized system achieves an exceptional LVFX removal rate of 98.8% within 30 min, driven predominantly by singlet oxygen ( 1 O₂) and superoxide radicals ( • O 2 − ). The catalyst demonstrates robust stability over multiple cycles, facile magnetic separation, and effective detoxification of LVFX. This work provides a novel paradigm for developing multifunctional photocatalytic systems by marrying heterojunction engineering with atomic-level interface modulation for sustainable water purification.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2026
·
IF 8.7
Nasim Ullah,Raza Ullah,Muhammad Adnan,Muhammad Rashid,Muhammad Fayaz,Bing Yu,Hailin Cong
g -C 3 N 4 activated ZIF-67 impregnated composite hydrogel beads adsorbent was synthesized. • Brilliant green was used as modal adsorbate. • Effect of initial dye concentration, contact time, pH, and temperature were examined. • Composite hydrogel beads adsorbent show maximum adsorption capacity of 226 mg/g. • The composite hydrogel beads adsorbent followed Pseudo-first-order kinetics and Freundlich isotherm. This research work presents new composite hydrogel beads adsorbent designed to adsorb brilliant green (BG) dye from water. The Graphitic carbon nitride (g-C 3 N 4 ) was modified with ZIF-67 and further integrated into sodium alginate to prepared composite hydrogel beads (CHB) adsorbent. The (CHB) adsorbent were comprehensively characterized using a suite of analytical techniques, such as FT-IR, TGA, SEM, EDX, XPS and BET analysis. To determine the optimal conditions for brilliant green dye removal, batch trials were carried out across a range of pH values (2−11), Dose (0.005–0.04 g), BG dye concentrations (25–300 mg/L), time (15–300 min), and temperatures (25–40 °C) studies respectively. The BET study showed that the surface area of (CHB) adsorbent was 0.500 m 2 /g. The (CHB) adsorbent demonstrated a maximum adsorption capacity of 226.27 mg/g. Kinetic analysis indicated that the (CHB) adsorbent followed second-order kinetics. The isotherm study indicated that the Freundlich model provided the best fit for the equilibrium data. The removal of BG using CHB adsorbent indicated that ΔGᴼ ranged from −2.22 to −2.37 KJ/mol. However, the ΔHᴼ received results was 3.91 KJ/mol. The determination indicating the adsorption process was endothermic and takes place spontaneously has been verified by the thermodynamic study. The results from the regeneration experiments indicated that the BG dye adsorption successfully completed up to five adsorption-desorption cycles while retaining an efficiency of 82.7% throughout the entire process. This (CHB) adsorbent providing an efficient and environmentally friendly for wastewater treatment.
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Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Qingfang Zhang,Jianghe Chen,Yuxin Zhou,Jianpeng Zhang,Xiangjing Zhang,Tianfeng Wang,Zuoyan Chen,Linhai Yang
As an environmentally friendly carrier, the non-toxic and non-hazardous nature of carbon nitride ensures that there is no secondary pollution of the environment during the application process, thus significantly enhancing the environmental sustainability of the overall process. In this study, carbon nitride was explored as a promising catalytic support for nickel doping, employing a pre-assembly strategy utilizing the bridging effect of 2-methylimidazole to introduce nickel atoms into the carbon nitride precursor uniformly. Subsequently, a tubular amorphous nickel-doped carbon nitride catalyst was successfully synthesized through a thermal polycondensation method. The material's morphological characteristics and physicochemical properties were characterized and analyzed using techniques such as XRD, TEM, and XPS. Ni/CN(4) samples exhibit the largest Fenton-like catalytic performance under neutral conditions, and the degradation of 50 mg/L phenol reaches 91.9 % within 1 h. The catalyst shows good catalytic activity within the initial pH= 4–11, and the degradation rate of phenol can still reach 85.5 % after 4 cycles of use. Free radical capture experiment and EPR results show that ¹O₂ and O₂•⁻ are the main active substances in the degradation process. The synthesized catalyst Ni/CN(4) uses 2-methylimidazole as an intermediate connecting the nickel source and supramolecular structure, so that the doped Ni can promote the directed polycondensation of the carbon nitdrive precursor, resulting in the formation of tubular structures. Nickel doping can introduce new active sites on the surface of carbon nitride, which can promote carbon nitride activated PMS to degrade phenol and have better durability in acidic or alkaline environments.
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Molecular Catalysis
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2025
·
IF 4.9
Juan Liang,Chunqiong Liu,Jiaxiu Guo,Kunming Huang,Jiao Shen
In this paper, we developed a one-dimensional activated carbon (AC) coated graphitic carbon nitride (g-C 3 N 4 ) hybrid nanorods (CN HU/AC) synthesized via an ultrasonic-hydrothermal method. The dual modulation of ultrasonic cavitation and hydrothermal confinement enables simultaneous morphology engineering (1D nanorod formation) and inerfacial microstructure optimization, endowing CN HU/AC with exceptional photoelectron transfer properties. Comparative studies with pristine g-C 3 N 4 and hydrothermally modified CN HU without AC addition reveal that the optimal AC loading (CN HU/AC5) achieves remarkable Cr(VI) photoreduction under visible light, exhibiting rate constants 6.6 times and 2.1 times higher than those of g-C 3 N 4 and CN HU, respectively. This enhancement originates from synergistic effects: (1) AC’s photosensitization broadens light absorption while its coating establishes intimate interfacial contact for accelerated charge transfer; (2) The 1D architecture directs axial elctron transport, coupled with surface C = O / O = C OH groups acting as electron traps; (3) Citric acid functions as both hole scavenger and Cr(VI) complexation agent to lower reduction barriers. This study establishes a paradigm for designing carbon-coupled heterostructures for the sustainable heavy metal remediation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Yue Wu,Hong Chen,Zhuo Chen,Qingling Guan,Shirui Zhang,Yuhao Huang,Yang Xiao,Yun Liao,Liangshu Xia,Fang Wang
Photocatalytic extraction of uranium from wastewater presents an attractive route for environmental remediation as well as sustainable nuclear energy, aligning with the carbon peaking and carbon neutrality goals. However, conventional g-C₃N₄-based photocatalytic systems suffer from fast electron-hole recombination. To address the challenge, this work innovatively constructed a photocatalytic material using a strategy of K/S co-doping coupled with cyano functionalization. It demonstrated superior U(VI) photocatalytic extraction efficiency, strong anti-interference capability against coexisting ions and excellent recyclability. An extraction efficiency of 95.7% for U(VI) was attained without any sacrificial agent or protective gas. The results indicated the synergy of K/S doping combined with cyano functionalization tailored the band structure and generated high localized electron density. The large molecular dipole induced a built-in electric field (BEF) promoting oriented photo-excited electron movement and thereby enhancing U(VI) photocatalytic extraction. Ultimately, U(VI) ions were enriched on the photocatalyst via deposition of (UO 2 )O 2 ·2H 2 O, driven synergistically by photogenerated electrons and ·O₂ − . This research presents a novel and effective approach for recovering uranium resources from wastewater through photocatalysis.
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