Journal of Environmental Chemical Engineering
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2026
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IF 7.5
Lixia Wang,Yun Liu,Pengyuan Cui,Dongfang Wang,Qian Li
Interfacial polymerization (IP)-based nanofiltration (NF) membranes often suffer from the permeability–selectivity trade-off due to uncontrolled monomer diffusion and nonuniform polyamide (PA) layer formation. In this work, a g-C₃N₄/polyethyleneimine (PEI) hybrid interlayer was constructed on a polyethersulfone substrate via vacuum-assisted deposition to regulate interfacial polymerization and enhance sulfate separation performance for nanofiltration-related water softening applications. The synergistic interaction between g-C₃N₄ nanosheets and PEI effectively suppressed nanosheet aggregation, enlarged interlayer spacing, and improved interfacial compatibility, thereby promoting the formation of an ultrathin and highly cross-linked PA selective layer. The optimized TFNi-2 membrane exhibited a high water flux of 65.8 L·m⁻²·h⁻¹ together with a Na 2 SO 4 rejection of 96.8% at 0.4 MPa, demonstrating excellent permeability and selective rejection toward multivalent ions. Structural characterizations confirmed that the g-C₃N₄/PEI interlayer regulated amine diffusion behavior and suppressed nonuniform PA formation, resulting in a compact and defect-suppressed selective layer with an MWCO of approximately 600 Da. In addition, the highly permeable interlayer generated a favorable “gutter effect” that reduced transport resistance and facilitated water permeation. The optimized membrane also exhibited satisfactory chlorine resistance and long-term operational stability. This work provides new insights into interlayer-regulated interfacial polymerization for the development of high-performance nanofiltration membranes for sulfate removal and water softening applications.
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高影响因子
DIAMOND AND RELATED MATERIALS
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2026
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IF 5.2
Muhammad Ali Hamza Shahbaz,Madaminov Sanjarbek Maxmudjon ugli,Hamid Nasir,Maryam Al Huwayz,Muneerah Alomar,Amir Muhammad Afzal,Sohail Mumtaz,Abhinav Kumar
Dysprosium cobalt oxide (DCO)-graphitic carbon nitride (gCN)-MXene hybrid nanocomposites were synthesized with a simple hydrothermal technique for advanced energy storage and catalysis devices. The result of XRD, SEM, and XPS analyses validated that it exhibited high crystallinity, uniform morphology, and a significant amount of surface functionalities. The electrochemical testing was conducted, and the specific capacity (Qs) is estimated to be 1865.9C g −1 at 3 mV s −1 , while the hybrid supercapacitor has a Qs of 280.04C g −1 , energy density (Ed) of 45 Wh kg −1 , and power density (Pd) of 2836 W kg −1 . Furthermore, the composite showed a remarkable electrocatalytic activity with an overpotential of 69 mV and the Tafel slope of 64 mV dec −1 , which indicates that it has good charge transfer property. The findings prove that DCO@MXene@gCN is an electroactive material with multifunctional properties suitable for novel and advanced energy systems. Download: Download high-res image (176KB) Download: Download full-size image
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CHEMICAL PHYSICS LETTERS
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2025
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IF 3.1
Huimei Mo,Zhanhong Chen,Xiaoying Liao,Shiting Liang,Jin Xu,Haolang Zeng,Shuqian Shen,Junhui Yi
Morphology engineering and heteroatom doping are established strategies for developing high-performance photocatalysts. In this study, phosphorus-doped three-dimensional porous g-C₃N₄ nanosheets were synthesized by calcining melamine–cyanuric acid supramolecular precursors, followed by gas-phase phosphidation using NaH₂PO₂ at 300 °C. The optimized material exhibited exceptional photocatalytic activity, achieving over 99 % Rhodamine B degradation within 40 min under visible light, significantly outperforming undoped 3D and bulk g-C₃N 4 . It also showed the highest photocurrent density and prolonged carrier lifetime, indicating enhanced charge separation. The catalyst maintained >90 % efficiency after four cycles, demonstrating remarkable stability. Mechanistic studies revealed that holes and superoxide radicals serve as the primary active species, with hydroxyl radicals also participating. The enhanced performance is attributed to the synergistic effect of P-doping—which modifies the electronic structure—and the 3D porous framework, which facilitates mass transfer and exposes active sites. This work provides a scalable route to efficient photocatalysts for environmental remediation.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Tiefeng Xu,Chenyu Li,Ke Xiang,Yingxin Lu,Wangyang Lu
The photocatalytic removal of organic pollutants from wastewater has gained significant attention in recent years due to its environmental benefits and cost-effectiveness. In this study, a pyrolytic iron phthalocyanine/graphitic carbon nitride (FePc/g-C 3 N 4 ) composite photocatalyst was synthesized using ball milling and thermal cracking, and its performance in photocatalytic degradation along with the underlying mechanisms was investigated. Under solar light irradiation, the pyrolytic FePc/g-C 3 N 4 photocatalyst achieved complete carbamazepine (CBZ) degradation within 12 min by activating peroxymonosulfate (PMS), demonstrating a 29 % enhancement in degradation efficiency compared to the unpyrolytic FePc/g-C 3 N 4 . Additionally, the stability of the catalyst improved significantly post-pyrolysis, maintaining over 98 % degradation efficiency across nine cycles. The thermal treatment disrupted the phthalocyanine structure, modifying the coordination environment of the central Fe atom and facilitating the transfer of photogenerated charge carriers. This research provides valuable insights for designing stable single-atom iron-based composite photocatalysts.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Tingan Yao,Guohui Dong,Ying Gao,Dongfeng Sun,Hehua Zeng
This study successfully constructed a g-C₃N₄/FeOOH S-scheme heterojunction photocatalyst with lotus-leaf structural effects, addressing the challenges of insufficient oxygen and water adsorption sites and high photocurrent recombination rates in g-C₃N₄ photocatalysts. The optimized photocatalyst exhibits outstanding performance, generating hydroxyl radicals via dual pathways under visible light (generation rate: 2.8 μmol/(L·min)). The lotus-leaf effect in the composite was confirmed through morphology analysis, static water contact angle measurements, and oxygen adsorption/desorption experiments, demonstrating an 18.9-fold enhancement in oxygen capacity. In situ XPS, built-in electric field intensity measurements, and theoretical calculations confirm that the built-in electric field at the interface, directed from g-C₃N₄ toward FeOOH, drives an S-scheme charge transport pathway. This not only achieves efficient spatial separation of photogenerated carriers but also uniquely preserves the system's strongest redox capability, significantly enhancing photocatalytic efficiency. Furthermore, in situ infrared spectroscopy and electron paramagnetic resonance studies confirm the composite material's dual-channel mechanism for hydroxyl radical generation via oxygen reduction and water oxidation. This work provides robust experimental and theoretical foundations for understanding and designing S-scheme heterojunctions for dual-channel hydroxyl radical generation in photocatalysis.
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Carbohydrate Polymer Technologies and Applications
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2025
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IF 6.5
Liu Shi,Sihui Lin,Yixuan Gong,Xiangrong Wei,Jie Ruan,zhongxiao zhou
Flocculation is crucial for water purification, but conventional flocculants are hampered by inefficiency and environmental concerns. This study develops a novel chitosan-polyacrylamide (CS-PAM) flocculant innovatively synthesized using graphitic carbon nitride (g-C₃N₄) as a dual-function photoinitiator and cross-linker. This facile photocatalytic approach under ambient conditions yielded a composite flocculant (CNCSPAM) with a uniquely integrated network. The optimized CNCSPAM exhibited exceptional performance in treating highly turbid wastewater, achieving over 97% turbidity removal at an ultralow dosage of 0.25 mg L⁻¹, rapid sedimentation kinetics (<2 min), vastly outperforming its individual components. It also demonstrated wide pH applicability and strong tolerance to environmental interferents. Flocculation kinetics and mechanism studies revealed that the high efficiency stems from a synergistic effect: charge neutralization by chitosan enhanced by the bridging effect of the cross-linked PAM network. This work provides a sustainable and cost-effective flocculation strategy, notable for its green synthesis, minimal dosage, and high efficacy, representing a significant advance for water treatment technologies.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Jiawei Xiao,Yongli Li,Jinshu Wang,Ting He,Junshu Wu,Panting Song,Youheng Yao
Photocatalysis is regarded as a promising strategy to address global energy and environmental challenges. Therein, S-scheme heterojunctions composed of complementary semiconductors can significantly enhance the utilization efficiency of photogenerated charge carriers while preserving the inherent strong redox capabilities of the semiconductors. However, the inadequate interfacial contact between the host and guest semiconductors hinders the enhancement of carrier separation efficiency. Herein, we developed a facile route to obtain uniform dispersion of WO 3 quantum dots (QDs) on g-C 3 N 4 . Specifically, the interfacial W-N bonding tightened the connection between WO 3 and g-C 3 N 4 , which serves as an efficient pathway for electron transfer, and significantly accelerates the directional migration of charge carriers following S-scheme. The optimized WO 3 QDs/g-C 3 N 4 S-scheme heterojunction exhibits a remarkable hydrogen evolution rate of 11,097.3 μmol·g⁻¹·h⁻¹ under simulate solar irradiation. Notably, the catalyst enables prominently overall water splitting without adding sacrificial agent, achieving simultaneous evolution of stoichiometric hydrogen and oxygen, 254.5 and 125.8 μmol·g⁻¹·h⁻¹, respectively, which are 5.2 times higher than those of WO 3 NPs/g-C 3 N 4 . Even without deposition of Pt as the co-catalyst, WO 3 QDs/g-C 3 N 4 displays noticeable gas production from water. This work will provide an idea for design and preparation of efficient photocatalyst.
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PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2026
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IF 7.9
Xiaodong Yang,Tianyang Luo,Shunchang Yang,Yicheng Yang,Pengkai Sun,Lili Wang,Shuo Yang,Ye Han,Bin Gao,Dawei Su
Antibiotic residues are increasingly detected in aquatic environments, posing persistent ecological risks and threatening the sustainable reuse of wastewater resources. Developing low-cost, environmentally benign, and durable photocatalysts for efficient antibiotic removal remains a major challenge for practical water treatment. In this study, an interfacial-bonded kaolinite/g-C 3 N 4 composite was fabricated through an acid–alkali-assisted ball-milling strategy using earth-abundant raw materials. The structural, surface, optical, and photoelectrochemical properties of the composites were systematically characterized, while density functional theory (DFT) calculations were employed to elucidate the interfacial charge-transfer mechanism. The optimized composite (2mKCN10) exhibited a specific surface area of 66.23 m 2 g −1 , approximately 1.4 times that of pristine g-C 3 N 4, and achieved 88.12% levofloxacin removal within 120 min under simulated solar irradiation. The catalyst retained approximately 85% of its initial photocatalytic activity after ten consecutive cycles, demonstrating excellent long-term stability. Radical trapping experiments identified ·O 2 - as the dominant reactive species, while experimental characterization combined with DFT calculations supports the proposed interfacial electronic coupling between kaolinite and g-C 3 N 4 , which promotes charge separation and accelerates carrier migration. The simple and scalable ball-milling synthesis, combined with the use of naturally abundant clay minerals and the absence of noble metals, provides a practical route toward developing low-cost photocatalysts for antibiotic-contaminated wastewater treatment. This work offers an effective strategy for engineering clay–semiconductor interfaces and advances the development of sustainable photocatalytic technologies for wastewater remediation and future water reuse. Download: Download high-res image (256KB) Download: Download full-size image
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SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2026
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IF 4.8
Jian Xiao,Jiang Liu,Yuxin Guo,Jiali Lin,Qian Li,Dong Zeng,Ruizhi Wen,Hongchang Li
Given the vital nutritional and metabolic role of ascorbic acid (AA) and the need for rapid detection, a photoresponsive nanozyme-based composite was developed for sensitive, accurate, and convenient AA analysis. In this report, a ternary ZIF-8/g-C 3 N 4 /SiO 2 photoresponsive oxidase-mimicking system was developed and applied to AA detection. By regulating the loading ratio of ZIF-8 on the g-C 3 N 4 /SiO 2 substrate, the composite with excellent photoresponsive oxidase-like activity was successfully prepared. Owing to its enhanced visible-light absorption and efficient charge separation and transfer, the system exhibited significantly improved photoresponsive performance. Experimental results demonstrated that ZIF-8/g-C 3 N 4 /SiO 2 could catalyze the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB), generating oxidized TMB (oxTMB) through the formation of reactive species, thereby producing a distinct color change. In an acidic environment, AA inhibited the oxidase-like activity of the catalyst due to its strong reducing capability, thus suppressing the colorimetric reaction. Based on this principle, the as-synthesized ZIF-8/g-C 3 N 4 /SiO 2 photoresponsive oxidase mimic was applied to the detection of AA in three beverages. The method revealed a good linear response within the concentration range of 1–40 μM, and the detection limit (LOD) was 0.14 μM. The recoveries of the spiked samples ranged from 95.00% to 103.85%, suggesting that the present method could be successfully applied to sense AA in practical samples. Furthermore, we integrated ZIF-8/g-C 3 N 4 /SiO 2 with the RGB strategy into a novel sensing platform for the visual/onsite semi-quantitative detection of AA in real samples, demonstrating the great potential prospects for the development of rapid food assay.
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PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2026
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IF 5.4
Feng Li,Dan Zhou,Yaoping Guo,Keng Xuan,Yingqi Wang,Ying Zheng,Xuegang Wang,Zhanxue Sun,Yadan Guo
The contamination of water by soluble hexavalent uranium (U(VI)) requires the development of highly active and stable treatment materials. This study presents a rational design for a heterostructured photocatalyst by coupling phosphorus-modified graphitic carbon nitride (PCN) with NiAl-layered double hydroxide (NiAl-LDH). The structural theory was that P-doping would tailor the optoelectronic properties of g-C₃N₄, while integration with NiAl-LDH would establish a synergistic system for concurrent adsorption and photoreduction. As anticipated, the P modification inhibited crystal growth and improved charge separation in g-C₃N₄, elevating its U(VI) reduction rate by 3.67-fold. The NiAl-LDH component provided a high-specific-surface-area substrate for pollutant enrichment. The resulting optimal NiAl-LDH/PCN composite formed a Type-II heterojunction, which directed efficient charge transfer between the two phases. Under simulated sunlight, the composite achieved high removal efficiencies of 96.0% for U(VI) and 95.2% for Cr(VI). The performance stems from a synergy where NiAl-LDH concentrates target ions at the interface, and PCN furnishes photogenerated electrons via facilitated charge transfer, thereby accelerating the photoreduction kinetics. The material also demonstrated robust reusability and effectiveness in treating actual wastewater, highlighting its strong potential for practical heavy-metal-ion remediation.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Yuanliang Gu,Zinan Zhang,Shengshen Gu,Qi Zhang,Meng Guo,Yang Pan,Genghao Gong,Zhaoliang Cui,Xiuxiu Ren,Jing Zhong
1,2-bis(triethoxysilyl)ethane (BTESE)-derived organosilica membranes have good acid-resistant stability in the application of acetic acid dehydration via pervaporation technology. To enhance the separation performance of water (0.26 nm) and acetic acid (0.43 nm), graphitic carbon nitride (g-C 3 N 4 ) distinguished by its periodic nanoporosity (0.31-0.34 nm) and hydrophilic functionality, offers exceptional potential for organosilica-based membranes improvement. Herein, we tailored g-C 3 N 4 nanostructures as 2D nanosheets (4 nm thickness) and 0D quantum dots (4 nm diameter), and embedded them into BTESE membranes. For their thermal stability, the nanosheets enhanced structural integrity due to interlayer covalent/hydrogen bonding networks, while quantum dots exhibited a larger weight loss but preserved more residues at 800 o C. Nanosheets incorporated BTESE/g-C 3 N 4 composites reduced BTESE pore size, amplified surface hydrophilicity and membrane thickness, whereas quantum dots with abundant functional groups minimally altered BTESE matrix structures. In pervaporation of acetic acid/water, BTESE performance was improved by both morphologies of g-C 3 N 4 fillers at the same optimal loading. The nanosheet-incorporated membrane (BTESE/CN-NSs-3) achieved a separation factor of 2327 with a flux of 2.35 kg/m 2 ·h, while quantum dots-incorporated membrane (BTESE/CN-QDs-3) exhibited a higher flux of 2.52 kg/m 2 ·h but a lower separation factor of 1352. In feed concentration (50–90 wt% AcOH) and temperature dependent (55–95 °C) operations, nanosheets facilitated molecule sieving through interlayer channels, whereas quantum dots enabled lower-resistance pathways by diffusivity dominated permeation. This work establishes g-C 3 N 4 dimensionality modulating organosilica membrane’s transport hierarchy, providing a selection for developing acid-resistant membranes in improving flux and separation factor.
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Journal of Materials Chemistry C
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2025
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IF 5.1
Rui Ding,Wenjuan Zhang,Shiva Pandeya,Xueqing Zhu,Kai Xu,Meixing Gui,Hongbing Wang,Ziliang Li,Qianqian Shang,Mahesh Kumar Joshi
The design of a double Z-type heterojunction represents a promising strategy in photocatalysis to achieve superior charge carrier separation, increased light-harvesting capability, and consequently, a higher photocatalytic reaction rate. Herein, a novel ternary heterojunction with direct dual Z-scheme configuration, g-C3N4/In2S3/In2O3 photocatalyst, was synthesized using a chemical bath and facile calcination process. The XRD, SEM-EDS and XPS results confirmed the successful integration of g-C3N4, In2S3, and In2O3 with preserved crystalline phases. Photocatalytic performances of the ternary composite were evaluated via two effective routes, such as methyl orange (MO) degradation and hydrogen (H2) generation, benchmarked against the pristine g-C3N4 and the g-C3N4/In2S3 and In2S3/In2O3 binary composite, revealing that the in-situ growth of In2O3 onto the g-C3N4/In2S3 composite contributed to the remarkable enhancement of their photocatalytic activity. The photodegradation process follows the pseudo-first order reaction kinetics. The ternary g-C3N4/In2O3/In2S3 heterojunction exhibited 94.8% degradation efficiency of MO with a corresponding rate of 23.4×10-3 min-1, 4.8 times higher than the pristine g-C3N4, and excellent photocatalytic activity in five consecutive cycles. Similarly, the g-C3N4/In2S3/In2O3 heterojunction exhibited a rate constant of ~2.4 mmol h−1 g−1 for H2 generation. This superior enhancement was attributed to the dual Z-scheme charge transfer mechanism. The formation of direct dual Z-scheme heterojunction improved the light harvesting, minimized electron hole recombination, and efficiently facilitated the separation of charge carriers. This work provided a mechanistic insight for engineering multifunctional heterojunction for environmental remediation and pollutant mitigation.
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