ENVIRONMENTAL RESEARCH
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2026
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IF 8.2
Wei Peng,Xiancai He,Jiangang Li,Xianlin Chen,Zhongsheng Chen,Guolin Huang
With the extensive deployment of nuclear energy, uranium contamination—particularly in the hexavalent form U(VI)—has become an escalating threat to aquatic systems. Photocatalytic reduction has emerged as a green and sustainable strategy for environmental remediation. However, achieving high photocatalytic efficiency and effective solar energy utilization remains a significant challenge. In this study, a series of BaTiO 3 /g-C 3 N 4 (BTO/CN) type-II heterojunction photocatalysts were synthesized through a simple hydrothermal method with rational band alignment. The effect of different BTO/CN ratios on U(VI) removal efficiency was evaluated. Among the tested compositions, BaTiO 3 /g-C 3 N 4 -4 exhibited the highest photocatalytic performance, achieving a U(VI) removal efficiency of 96.2% within 20 min of visible light irradiation—significantly outperforming both individual components and other composite ratios. The optimized heterojunction effectively modulated the electronic band structure, facilitating the rapid separation of photogenerated electron-hole (e − -h + ) pairs. Furthermore, the synergistic effect between the heterojunction interface and the intrinsic ferroelectric properties of BaTiO 3 significantly suppressed charge carrier recombination and extended the visible-light absorption range. This, in turn, substantially enhanced the overall photocatalytic efficiency of the system. The rational design of BaTiO 3 /g-C 3 N 4 heterojunctions offers a promising strategy and a robust experimental basis for the development of high-efficiency photocatalysts of uranium remediation.
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JOURNAL OF RARE EARTHS
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2026
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IF 9.6
Yujie Liang,Ruoshan Lei,Yun He,Shilong Zhao,Feifei Huang,Lei Lei
To develop novel luminescent materials with optical thermometry and anti-counterfeiting functionalities, this work designed, prepared, and characterized a series of Sc 2 Mo 3 O 12 : Eu 3+ (SMOE) phosphors and SMOE/g-C 3 N 4 composites. Structural and optical analyses reveal that SMOE exhibits two-dimensional negative thermal expansion (NTE) behavior and high resistance to luminescence concentration quenching. Via vapor deposition, g-C 3 N 4 was deposited onto SMOE particles, slightly enhancing their NTE performance. Upon UV excitation, SMOE/g-C 3 N 4 shows dual-emission characteristics featuring blue luminescence from g-C 3 N 4 and red-orange emissions from Eu 3+ , with different dependencies on excitation wavelength. Additionally, the g-C 3 N 4 emission band undergoes spectral narrowing and fast thermal quenching with increasing temperature, in contrast to the relatively stable Eu 3+ emissions. These divergent thermal responses enable five independent thermometric parameters (luminescence intensity ratios, spectral bandwidth, and individual emission intensities) to exhibit linear temperature dependence. A multi-parameter sensing strategy based on a multiple linear regression model yields a maximal relative sensitivity of an exceptional 30%/K, surpassing single-parameter approaches and outperforming most previously reported optical thermometers. Moreover, SMOE/g-C 3 N 4 is proved to be highly suitable for anti-counterfeiting labels, as its luminescence color can be switched by controlling the excitation conditions. Overall, SMOE/g-C 3 N 4 is a highly promising dual-functional material coupled with excellent thermal sensing and anti-counterfeiting capabilities.
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SEPARATION AND PURIFICATION TECHNOLOGY
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2026
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IF 9.1
Ge Song,Zibin Lin,Jiayi He,Wenping Shu,Shikun Wei,Minghua Zhou
Electrocatalytic dehalogenation provides an efficient and sustainable strategy for cleaving carbon-halogen bonds, yet its practical efficiency is often limited by insufficient catalytic activity alongside inherent mass transfer constraints. To address this challenge, this study focused on both the catalyst and reactor levels. Herein, a non-noble metal catalyst, oxygen vacancy-rich Co 3 O 4 /g-C 3 N 4 (O v -CoCN), was developed and integrated into a flow-through reactor for efficient electrocatalytic reductive dehalogenation, which significantly enhanced mass transfer and reaction kinetics. Using the halogenated antibiotic thiamphenicol (TAP) as the target pollutant, the system demonstrated outstanding degradation efficiency under continuous-flow operation. Under optimal conditions with a catalyst loading of 7.1 mg/cm 2 , pH 5, a flow rate of 2 mL/min, and a current density of 7 mA/cm 2 , nearly complete removal of 10 mg/L TAP was achieved. The introduced oxygen vacancies, engineered to modulate the electronic structure of CoCN, played a critical role in facilitating electron transfer and promoting the generation of the key reactive species, atomic hydrogen (H*). The catalyst exhibited excellent application potential, maintaining high removal efficiency across a broad pH range (3−11) and pollutant concentrations (1–50 mg/L), and showed remarkable stability over a 12-h continuous operation. This work provides new insights into the design of both reactors and catalysts for efficient electrocatalytic dechlorination.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 4
·123279
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IF 7.5
Bolin Chen,Chunhong Nie,Nan Yang,Wen Xin,Zhichao Gong,Luhua Hou,Haonan Zhang
Solar-driven carbon dioxide reduction (CO 2 RR) is a highly promising strategy for closing the carbon cycle and enabling the sustainable production of clean chemicals. However, its practical efficiency remains severely limited by sluggish reaction kinetics and competing reaction pathways. In this study, through rational interfacial engineering to induce a stable built-in electric field, we constructed an S-scheme heterojunction based on CeO 2 (110)/g-C 3 N 4 to achieve coordinated modulation of photocatalytic CO 2 reduction. Under gas-solid-phase reaction conditions without a sacrificial agent, the catalyst delivered a yield of 2.51 μmol·g −1 ·h −1 , representing an 8.05-fold enhancement compared with pristine g-C 3 N 4 . A series of experimental investigations indicate that the internal electric field not only promotes the efficient separation and migration of photogenerated carriers but also strengthens CO 2 adsorption and activation, thereby steering the original CO-forming pathway toward an eight-electron-dominated CH 4 pathway. This work may offer a viable heterojunction design strategy for achieving selective CO 2 RR.
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PHYSICA B-CONDENSED MATTER
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2026
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IF 3.2
Chang Feng,Qian Jing,Li Tang,Jiangping Jing,Ruiling Wang,Zhuoyuan Chen
S-C 3 N 4 /Mg(OH) 2 heterojunction photocatalyst was synthesized via a simple ball-milling method. • S-C 3 N 4 /Mg(OH) 2 exhibited significantly enhanced photocatalytic performance. • S-C 3 N 4 /Mg(OH) 2 demonstrated stable photocatalytic activity in complex ionic environments. • The photocatalytic reaction mechanism of S-C 3 N 4 /Mg(OH) 2 was proposed in this work. This work fabricated a type II 2D/2D S-doped graphitic carbon nitride/magnesium hydroxide (S-C 3 N 4 /Mg(OH) 2 ) heterojunction photocatalyst via a straightforward ball-milling method. The Mg(OH) 2 nanosheets are uniformly dispersed on the surface of S-C 3 N 4 , forming a well-developed heterojunction structure. The S-C 3 N 4 /Mg(OH) 2 composite material was employed as a photocatalyst and exhibited high efficiency in degrading tetracycline and methyl orange in an aqueous environment. The optimized S-C 3 N 4 /Mg(OH) 2 -30 composite demonstrated superior photocatalytic performance, achieving 100% removal of tetracycline within 45 min and 93% degradation of methyl orange within 60 min. Its performance was significantly superior to that of the single-component photocatalysts, and it exhibited stable photocatalytic activity even in complex ionic environments. The formation of Type-II heterojunction between S-C 3 N 4 and Mg(OH) 2 facilitates charge separation/migration and thus significantly enhanced pollutant removal efficiency. The S-C 3 N 4 /Mg(OH) 2 composite material fabricated in this work shows great promise for practical wastewater treatment applications. The S-C 3 N 4 /Mg(OH) 2 heterojunction photocatalyst was successfully fabricated. It not only exhibits outstanding photocatalytic performance in degrading organic pollutants but also maintains stable photocatalytic degradation ability even under complex ionic conditions. Download: Download high-res image (368KB) Download: Download full-size image
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JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 35
·26088-26113
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IF 4.4
Li Jingmei,Pang Zibo,Qi Junxiao,Lu Jiamin
In this study, CuTCPP was loaded onto the surface of g-C 3 N 4 through a simple organic reaction to prepare a series of g-C 3 N 4 -CuTCPP (CNTP) photocatalytic composite materials. The material was characterized using XRD, SEM, EDS, and other methods to analyze its physicochemical properties. The biological safety of materials was evaluated through in vitro cytotoxicity experiments. Using E. coli , S. aureus , P. aeruginosa , B. subtilis , and C. albicans as model microorganisms, the broad-spectrum antibacterial performance of composite materials was tested under visible light to investigate the effects of concentration gradient and light exposure time on sterilization efficiency. The antibacterial mechanism was further revealed through reactive oxygen species fluorescence detection, free radical scavenging experiments, and evaluation of cell membrane damage. In addition, livestock and poultry wastewater was used as actual water samples to verify the practical application potential of the materials. Graphical abstract
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JOURNAL OF MOLECULAR STRUCTURE
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2025
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IF 4.7
Jiale Ni,Zicheng Yang,Binxuan Hong,Yi Feng,Jianfeng Yao
This research endeavors to optimize the morphology and edge defects of g-C 3 N 4 through straightforward pyrolysis of rationally chosen precursors, with the objective of increasing the CO 2 conversion efficiency. Our findings reveal that employing melamine and urea as precursors yields tubular g-C 3 N 4 (CN tube), featuring an increased surface area and a greater density of edge defects than melamine-derived bulk g-C 3 N 4 and urea-derived layered g-C 3 N 4 . As a result, the obtained CN tube can deliver an impressive yield of 98 % for CO 2 cycloaddition with epichlorohydrin at 12 h under mild conditions of 80 °C and 0.1 MPa CO 2 pressure, significantly outperforming those derived from melamine (53 %) or urea (66 %) alone. This investigation demonstrated the pivotal role of a tubular architecture and enriched edge defects in facilitating the thermally driven CO 2 fixation process to produce cyclic carbonates.
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APPLIED SURFACE SCIENCE
·
2025
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IF 6.9
Cheng Yang,Xinyue Yang,LiXun Feng,ZiJian Chen,Jia He,HuiTing Sui,Huajun Sun
Piezoelectric photocatalysis is emerging as a promising approach for green environmental protection. Herein, a molybdenum disulfide/graphitic carbon nitride S-scheme heterojunction catalyst achieved a Rhodamine B degradation rate exceeding 99 % within 30 min under the synergistic effects of light and ultrasound, along with a hydrogen (H 2 ) production rate of 16.2 mmol g −1 h −1 . The synergy of ultrasound and light improved catalytic efficiency by approximately 45 % compared with light alone. Experimental characterizations, including Kelvin probe force microscopy, in situ X-ray photoelectron spectroscopy, and density functional theory calculations, confirmed the presence of dual built-in electric fields arising from band alignment and strain-induced polarization. These fields facilitated efficient electron–hole separation, thereby greatly enhancing the overall piezoelectric photocatalytic performance and resulting in efficient use of mechanical and solar energy for H 2 production and pollutant decomposition.
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BMC Chemistry
·
2025
·Vol. 19
·期 1
·1-15
·
IF 4.6
Lei Ying,Bao Qijing,Lin Feng,Zhang Jian,Zhang Yanji,Wu Yuechao,Lv Liang,Ding Liyong
Graphite carbon nitride (g-C 3 N 4 ) has emerged as a promising photocatalyst for visible-light-driven applications due to its suitable band structure. However, the rapid recombination of photogenerated electron-hole pairs in bulk g-C 3 N 4 significantly hinders its photocatalytic efficiency. In this study, we report the fabrication of a ternary g-C 3 N 4 /MoS 2 /rGO (CMG) nanocomposite via in situ photoreduction-induced exfoliation. The introduction of MoS 2 and rGO not only facilitates the exfoliation of g-C 3 N 4 into ultrathin nanosheet, thereby exposing more active sites, but also enables the formation of tightly coupled heterojunctions that promote charge separation and transfer. Photoluminescence (PL) analyses confirm the suppressed recombination of charge carriers, indicative of enhanced charge dynamics within the heterojunction between MoS 2 , rGO and g-C 3 N 4 . Among the synthesized materials, the optimized CMG-175 composite exhibits remarkable photocatalytic activity, achieving a 95.7% degradation rate of Rhodamine B (RhB) within 30 min under visible light irradiation, which is 23.6-fold enhancement compared to pristine g-C 3 N 4 . Mechanistic studies reveal that photogenerated holes and superoxide radicals are the predominant reactive species driving the degradation process. This work highlights a rational design strategy for constructing high-performance g-C 3 N 4 -based heterojunction photocatalysts and provides valuable insight into the synergistic interactions among MoS 2 , rGO, and g-C 3 N 4 for efficient organic pollutant removal.
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Sensing and Bio-Sensing Research
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2025
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IF 4.9
Jianjun Kang,Xue Lin,Chen Lin,Wuyuan Pan,Jian Wang,Fang Ke
Levodopa (L-DOPA) is a crucial neurotransmitter utilized in the treatment of neurological disorders, particularly in Parkinson's disease, where its concentration in biological fluids serves as a key diagnostic marker. Despite its significance, current methods for L-DOPA detection often suffer from limitations such as prolonged detection times, low sensitivity and weak anti-interference. This study addresses these challenges by introducing a highly efficient and colorimetric sensor for the rapid detection of L-DOPA, utilizing manganese-doped graphitic carbon nitride (Mn-g-C 3 N 4 ) as a peroxidase-mimetic catalyst. The sensor employs 3,3′,5,5′-tetramethylbenzidine as a substrate and achieves detection within 20 s, with a linear response over the concentration ranges of 1–10 μM and 20–90 μM, and the detection limits were 0.049 μM and 0.51 μM, respectively. The method has good specificity for L-DOPA and has been successfully applied to human serum even in the presence of interference from dopamine and other amino acids. In addition, the sensor exhibits satisfactory performance in smartphone-based L-DOPA detection. The novel sensor platform offers a simple, cost-effective, and scalable solution for real-time L-DOPA monitoring, with significant potential for applications in both clinical and environmental contexts.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2025
·
IF 4.6
Yuxin Ma,Xue Zhan,Yiqing Han,Wenjie Cui,Xue Ye,Jie Li
The photocatalytic oxidation of formaldehyde (HCHO) to CO 2 and H 2 O is a key method for the green degradation of gaseous HCHO. Graphitic carbon nitride (g-C 3 N 4 ) is widely studied for its stability, non-toxicity, and low cost, but its small specific surface area often leads to electron-hole recombination, limiting its photocatalytic efficiency. This study addresses this by preparing K-doped g-C 3 N 4 via thermal polymerization and synthesising a flower-like spherical BiOBr/Bi 2 WO 6 /2K-g-C 3 N 4 ternary heterojunction catalyst using hydrothermal and hydrolytic precipitation methods. The catalyst demonstrated a 96.00 % photocatalytic degradation efficiency for gaseous HCHO within 5 h, reaching 90.67 % at just 2 h, highlighting its superior charge separation capability. Characterization revealed that the flower-like morphology enhances light absorption by exposing more active sites, while the K-doped g-C 3 N 4 forms a double Z-scheme heterojunction with BiOBr/Bi 2 WO 6 , effectively separating and retaining photogenerated electrons and holes. This structure significantly boosts the catalyst's redox capacity, thereby improving its photocatalytic performance for HCHO degradation.
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CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Peng Liu,Furong Ye,Changcun Han,Chenxi Gao,Huai Yang,Xupeng Chen,Yizhong Huang
Photocatalytic water splitting for green H 2 offers a renewable-energy route, yet efficiency is still limited by poor charge separation and slow reaction kinetics. Here, we report a 2D/2D Ti 3 CN/g-C 3 N 4 heterojunction with a built-in electric field, synthesized via Lewis acid molten-salt etching and electrostatic self-assembly. The heterojunction promotes directional electron transfer from g-C 3 N 4 to Ti 3 CN, while Ru nanoparticles further enhance charge density and reduce the reaction barrier. The optimized Ru/Ti 3 CN/g-C 3 N 4 photocatalyst delivers a H 2 evolution rate of 4254 μmol g −1 ·h −1 under visible light, 200 times higher than pristine g-C₃N₄, with excellent cycling stability. Experimental and theoretical analyses reveal that the synergistic effects of the polarized interface and Ru cocatalyst significantly improve charge separation and H 2 adsorption kinetics. This work offering a practical route to couple MXene co-catalysts with polarization-induced built-in electric fields for markedly accelerating solar-driven H 2 production.
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