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.
研究领域:
环境科学
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材料科学
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高影响因子
Journal of Environmental Chemical Engineering
·
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 Energy Storage
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2025
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IF 9.8
Jin-hua Zhang,Peng-jie Zhu,Yan-zhen Liu,Xiang-ru Zhu,Yong-feng Li,Cheng-Meng Chen
The construction of heterostructured energy storage and conversion with special morphology has the potential to be an up-and-coming area of research. In this study, we designed and synthesized a Co₃O₄/g-C₃N₄ heterostructured electrode material with a distinctive morphology using a multistep fabrication approach. The heterojunction formed between Co₃O₄ and g-C₃N₄ induces interfacial charge redistribution, resulting in a built-in electric field that facilitates efficient electron transfer and enhances the electronic structure. Furthermore, the engineered morphology, comprising nanocages and hollow tubes, significantly increases the number of electrochemically active sites. The optimized electrode achieved an impressive specific capacity of 921.8 F g −1 at a current density of 1 A g −1 , along with excellent cycling stability, retaining 82.88 % of its initial capacity after 10,000 cycles. Moreover, an asymmetric supercapacitor constructed with Co₃O₄/g-C₃N₄ as the positive electrode and activated carbon as the negative electrode demonstrated a stable and high energy density of 36.3 Wh kg −1 .
研究领域:
材料科学
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能源存储与转换
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ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
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2024
·Vol. 31
·期 1
·1-13
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IF 3
Wu Jinze,Yao Jiale,Zhu Xiping,Zuo Danying,Zhang Hongwei,Jiang Shuai,Li Hongjun
Most hydrogels for dye treatment only have the adsorption ability for anionic or cationic dyes, while a few zwitterionic hydrogels that can adsorb both anionic and cationic dyes need a complicated regeneration process when they are reused. To prepare reusable zwitterionic adsorbent hydrogels, in this paper, a zwitterionic composite hydrogel with Ag@g-C 3 N 4 was prepared, which not only can adsorb both anionic and cationic dyes but also has photocatalytic degradation ability. The scanning electron microscopy images show that the optimum hydrogel has a large number of micro pores for dye adsorption. The adsorption capacity of the hydrogel achieves the highest in mixed dye concentration of 50 mg·L -1 with pH value of 7–9. Benefiting from the synergistic effect of adsorption and photocatalytic degradation, the removal efficiency of methyl orange and methylene blue in mixed dyes was up to 93.86% and 91.80%, respectively. The photocatalytic activity trapping experiments showed that superoxide radicals as well as hydroxyl radicals played a major role in photocatalytic degradation. After 5 consecutive photocatalytic degradations, the removal ratio of the hydrogel for dyes was still above 80%, indicating good photocatalytic degradation and reusability properties. This research suggested the zwitterionic composite hydrogel has a promising prospect in removing dyes from wastewater treatment.
研究领域:
环境科学
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材料科学
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高影响因子
Surfaces and Interfaces
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2025
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IF 6.3
Jingying Wang,Zengyue Chen,Xiaochen Liu,Zhansheng Wu,Li Jin
Glyphosate herbicide is commonly used to kill weeds in crops because of its high efficiency and low cost. However, excessive use of glyphosate not only leads to soil, surface water, and groundwater pollution, but also presents a potential risk to human health. Photocatalysis as an advanced oxidation technology can efficiently and environmentally degrade glyphosate, and bismuth-based photocatalysts have garnered extensive attention for their strong photo-oxidation capabilities. In this work, a green reaction route was developed to synthesize Bi-based/g-C 3 N 4 /CdS ternary heterojunction photocatalysts for glyphosate removal, by combining acetic acid-glycol synergistic systems with atmospheric pressure microwave methods. By regulating the structure and composition of the catalyst, excellent photodegradation and stabilization of glyphosate by BiOCl/g-C 3 N 4 /CdS (> 98% removal of glyphosate in 90 min). This study is of great significance for the green preparation and application of efficient photocatalysts for glyphosate removal, and the development of other recyclable systems.
研究领域:
环境科学
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材料科学
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JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Hui Lu,Xiaoran Li,Feng Li,Xiuquan Xu,Rong Zhao,Chenyi Xiong,Qing Hu,Zhuoqing Miao,Miao Tian
Photocatalytic technique has been widely accepted as a promising and effective candidate for eliminating antibiotic and pathogen pollutants in aquatic environment. Herein, a novel O, K co-doped g-C 3 N 4 photocatalyst embedded with single-atom Ag (denoted as Ag/OKCN) was successfully constructed to achieve the enhanced photocatalytic degradation and disinfection efficiency under visible light irradiation. The optimal Ag/OKCN-6 could eliminate 80.4 % of tetracycline (TC) within 60 min with a rate constant of 0.0259 min −1 , which was 4.98 times of pristine g-C 3 N 4 . Meanwhile, Ag/OKCN-6 could also completely inactivate>7-log CFU·mL −1 of Escherichia coli ( E. coli ) by efficient disruption of cell membranes. The synergistic effect of O, K co-doping and single-atom Ag embedding contributed to an extended light response, preeminent separation and transfer of photoexcited charges, prolonged carrier lifetime as well as ameliorative hydrophilicity, which was conducive to the excellent photocatalytic performance. Radical trapping and electron spin resonance (ESR) experiments validated that superoxide radicals ( • O 2 − ) were crucially responsible for the superior photocatalytic activity. This work provides a facile route to construct multi-strategy modified g-C 3 N 4 -related photocatalysts for efficiently eliminating aquatic environmental pollutants.
研究领域:
环境科学
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材料科学
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生物学
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高影响因子
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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INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Xiangta Xie,Yuyan Feng,Dongbo Wang
A novel in-situ grown α-Bi 2 O 3 /Bi 2 O 2 CO 3 /g-C 3 N 4 heterojunction (BBCx) was successfully fabricated via a two-step in-situ growth by a simple solvothermal calcination method. In this process, g-C 3 N 4 served as the substrate for the growth of Bi 2 O 2 CO 3 nanoplates, while Bi 2 O 2 CO 3 acted as the substrate for the subsequent growth of α-Bi 2 O 3 nanoplates. By characterizing the nanocomposite using different techniques, it was confirmed that the components of this ternary material are tightly bonded through heterojunction formation. Photocatalytic tests demonstrated that the composite exhibited higher activity than pure α-Bi 2 O 3 , Bi 2 O 2 CO 3 and g-C 3 N 4 . Among the composite materials, BBC400—obtained by solvothermal treatment followed by calcination at 400 °C for 2 h—exhibited the highest degradation efficiency toward tetracycline hydrochloride (TC-HCl), with a removal rate of 70% of TC-HCl within 120 min and a rate constant of 0.0081 min −1 . This rate constant was approximately 16.2 times (0.0005 min −1 ), 1.92 times (0.0042 min −1 ) and 1.35 times (0.006 min −1 ) higher than those of pure Bi 2 O 2 CO 3 , g-C 3 N 4 and α-Bi 2 O 3 , respectively. This synthesis approach offers a new strategy for the in-situ construction of heterojunction nanocomposites.
研究领域:
材料科学
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环境科学
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纳米技术
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光催化
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高影响因子
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.
研究领域:
材料科学
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环境修复
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光催化
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纳米材料
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化学工程
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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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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.
研究领域:
光催化
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材料科学
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环境化学
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纳米材料
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表面科学
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高影响因子
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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