INORGANIC CHEMISTRY COMMUNICATIONS
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2025
·
IF 5.4
Congyu Du,Xiaonan Zhang,Huiye Zhang,Yuanyuan Cheng,Jingjing Dong,Liyong Yuan
Uranium (U) pollution, characterized by its radiotoxicity, poses severe threats to environmental safety. Photocatalytic technology has garnered increasing attention for treating U-containing wastewater due to its high efficiency, ease of operation, and absence of secondary pollution. However, photocatalytic materials currently used for U extraction suffer from poor stability, weak resistance to salt ion interference, and high recombination rates of photogenerated carriers, limiting their applicability in complex environments, such as seawater. To tackle these challenges, we have innovatively designed a direct Z -scheme heterojunction photocatalyst, combining carbon nitride doped with oxygen and phosphorus (C 3 N 4 (OP)) with titanium dioxide (TiO 2 ). Here, doping with oxygen and phosphorus, along with the formation of a heterojunction, were employed to modulate the bandgap, enhance visible light absorption, and promote charge separation through an internal electric field. Experimental results demonstrated that the TiO 2 /C 3 N 4 (OP) system achieved a Uremoval efficiency exceeding 85 % under visible light irradiation, while maintaining structural stability and salt ion resistance in simulated seawater. Density Functional Theory (DFT) calculations revealed a directional electric field formation mechanism at the TiO 2 /C 3 N 4 (OP) interface, confirming that superoxide radicals (•O 2 − ) are the dominant active species, with hydroxyl radicals (•OH) serving as auxiliary contributors. This work establishes a synergistic mechanism involving bandgap engineering, interfacial charge separation, and active species collaboration, offering a novel strategy for solar-driven remediation of radioactive pollutants in complex environments.
研究领域:
环境科学
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光催化
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核环境工程
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材料科学
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水体修复
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Bin Zhan,Yan Liu,Wen-Ting Zhou,Shu-Yi Li,Zhi-Biao Chen,Thomas Stegmaier,Maryam Aliabadi,Zhi-Wu Han,Lu-Quan Ren
Oily wastewater causes serious pollution to the environment and has aroused widespread concern. Herein, non-toxic, environmentally friendly, multi-functional superwetting GO/g-C 3 N 4 /TiO 2 (GCT) foam was prepared via hydrothermal treatment and freeze-drying methods. The as-prepared GCT foam could simultaneously separate oil–water mixtures and adsorb water-soluble organic dyes, both the separation efficiency and adsorption efficiency are higher than 98%. In addition, the GCT foam have the ability to separate various oil-in-water emulsions with separation efficiency of higher than 99%. Meanwhile, the as-prepared GCT foam was able to degrade oil pollution and showed excellent antioil-fouling capability. The as-prepared multifunctional GCT foam is expected to have broad prospects in the treatment of oily wastewater and the adsorption of water-soluble organic pollutants, which may be providing a new strategy for the oily wastewater remediation.
研究领域:
环境科学
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材料科学
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污染治理
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 6
·2303-2311
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IF 3.288
Ning Jiang,Hongchao Geng,Yan Qiao,Xingqi Zhu,Chenyi Li,Qingyun Cai
A visible-light-active CuInSe2:Zn/g-C3N4/TiO2 nanowire (NW) photoelectrode was prepared by in situ growth of g-C3N4 on the surface of TiO2 NWs, followed by drop deposition of Zn-doped CuInSe2 quantum dots (CuInSe2:Zn QDs). It has a 2.205 eV band gap and can absorb visible light. The as-prepared ternary hybrid nanocomposite CuInSe2:Zn/g-C3N4/TiO2 NWs shows high photon absorption and photocurrent generation efficiency, as well as a high bactericidal effect on Staphylococcus aureus.
研究领域:
材料科学
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微生物学
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环境科学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Ya-Nan Li,Zhao-Yang Chen,Min-Qiang Wang,Long-zhen Zhang,Shu-Juan Bao
A porous g-C 3 N 4 /TiO 2 with hierarchical heterostructure has been successfully fabricated through a in situ assembling of small needle-like TiO 2 on the surface of ultrathin g-C 3 N 4 sheets. The ultrathin g-C 3 N 4 sheets with carbon vacancies and rich hydroxyl groups were found to facilitate the nucleation and in situ growth of TiO 2 and also to modulate the surface chemical activity of the g-C 3 N 4 /TiO 2 hierarchical heterostructure. The as-designed photocatalytic heterojunction degraded Acid Orange with 82% efficiency after 10 min under simulated solar light, and possessed excellent cycle stability. Relative physical characterizations and photochemical experiments reveal that engineering the interface/surface of g-C 3 N 4 plays a vital role in effectively constructing heterostructures of g-C 3 N 4 /TiO 2 , thus realizing efficient photoinduced electron-hole separation during photocatalytic process.
研究领域:
材料科学
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环境催化
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纳米技术
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光催化
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化学工程
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DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·123137
·
IF 7.5
Fenhong Song,Ruibo Zhang,Qi Qi,Long Ma,Gang Wang,Wenguang Wang,Jing Fan
The narrow light-absorption range and fast charge carrier recombination in semiconductor photocatalysts remain major bottlenecks limiting photocatalytic hydrogen evolution efficiency. In this work, SnO 2 /g-C 3 N 4 /TiO 2 ternary Type-II heterojunctions were rationally constructed via a hydrothermal-calcination two step strategy. Triethanolamine (TEOA) was employed as a sacrificial agent during the photocatalytic hydrogen production reaction. Different from traditional simple component mixing, SnO 2 is deliberately designed as an electron mediator to bridge g-C 3 N 4 and TiO 2 , forming a directional cascade charge transfer channel for efficient carrier separation. DFT theoretical simulations further verify that the introduction of TiO 2 optimizes the band structure, reduces the work function, and promotes interfacial electron transfer, thus significantly enhancing photocatalytic performance. The optimized 0.20SnO 2 /g-C 3 N 4 /TiO 2 sample delivers a maximum H 2 evolution rate of 4.80 mmol/g/h, 2.38-fold higher than that of bare TiO 2 . Stability assessments confirmed the material's exceptional cycling durability, a characteristic primarily ascribed to the establishment of type II heterojunctions. This architectural configuration facilitates effective segregation and mobility of photoinduced charge carriers while simultaneously suppressing recombination of electron-hole pairs. The materials' superior photoelectrochemical characteristics further enhance their capacity for light-driven hydrogen generation through catalytic processes. These discoveries provide new perspectives and innovative approaches for engineering high-performance photocatalytic systems.
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DOI
高影响因子
DALTON TRANSACTIONS
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2015
·Vol. 44
·期 29
·13030-13039
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IF 4.197
Hongmei Chen,Yinghao Xie,Xiaoqin Sun,Meilin Lv,Fangfang Wu,Lei Zhang,Li Li,Xiaoxiang Xu
Separation of photo-generated charges has played a crucial role in controlling the actual performance of a photocatalytic system. Here we have successfully fabricated g-C3N4/TiO2-B nanowire/tube heterostructures through facile urea degradation reactions. Owing to the effective separation of photo-generated charges associated with the type-II band alignment and intimate interfacial contacts between g-C3N4 and TiO2-B nanowires/tubes, such heterostructures demonstrate an improved photocatalytic activity over individual moieties. Synthetic conditions such as hydrothermal temperatures for the preparation of TiO2-B and the weight ratio of TiO2-B to urea were systematically investigated. A high crystallinity of TiO2-B as well as the proper growth of g-C3N4 on its surface are critical factors for a better performance. Our simple synthetic method and the prolonged lifetime of photo-generated charges signify the importance of type-II heterostructures in the photocatalytic applications.
研究领域:
材料科学
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环境科学
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DOI
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
Lin Wang,Maolin Sha,Jun Zhou,Xin Wei,Chentai Cao,Zishuai Cheng,Hai Yu,Jianguo Lv
The addition of B enhances the built-in electric field in the heterojunction. • The heterojunction could effectively degrade NOR over different environmental parameters. • The possible photocatalytic degradation pathway of NOR was investigated. • S-scheme charge transfer mechanism in heterojunction was proposed Antibiotic residues in natural water have posed great risks to ecological safety and public health. There, B-doped g-C 3 N 4 /TiO 2 (BCN/TNS) S-scheme heterojunctions were constructed through self-deposition. The optimized 0.7BCN/TNS heterojunction exhibited superior photocatalytic activity and degraded 94.8% norfloxacin (NOR) within 90 min, the rate constant was 2.06-fold and 1.46 folds than that of TiO 2 nanosheet array (TNS) and g-C 3 N 4 /TiO 2 (CN/TNS). The as-prepared also displayed high stability and strong adaptability over different environmental parameters. Radical trapping experiments and ESR measurements verified that ·O 2 - was the dominant active species during NOR degradation. Photoelectrochemical measurements and theoretical calculations indicate that the introduction of B not only increases the number of active sites and broadens the spectral absorption range, but also enhances the strength of the internal electric field (IEF), promoting charge transfer at the heterointerface. This paper supports a feasible strategy for designing a superior B-doped g-C 3 N 4 -based heterojunction for antibiotic wastewater treatment. Download: Download high-res image (192KB) Download: Download full-size image B-doped g-C 3 N 4 /TiO 2 S-scheme heterojunctions for efficient norfloxacin removal.
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DOI
高影响因子
Electronic Materials Letters
·
2022
·Vol. 19
·期 1
·94-107
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IF 3.151
Luo Menghao,Feng Hange,Hu Yuechuan,Chen Keke,Dong Zibo,Xue Shaolin
Abstract Photocatalytic degradation has received considerable emphasis since it shows significant possibilities in environmental pollution. In this work, ternary Z-scheme heterojunction g-C 3 N 4 /TiO 2 /Ti 3 C 2 photocatalysts are designed and fabricated. The Z-scheme heterojunctions formed on the surfaces of g-C 3 N 4 and TiO 2 dramatically modify the photocatalytic performances of the compound under illumination. Meanwhile, in this process, multilayer Ti 3 C 2 , as the transport medium of Z-scheme heterojunction, is tightly bonded to TiO 2 generated by hydrothermal oxidation and g-C 3 N 4 with large specific surface area, which effectively facilitates the space charge separation and depresses the charge recombination. When the addition amount of TiO 2 /Ti 3 C 2 is 80 mg and calcined at 450 ℃ for 4 h, g-C 3 N 4 /TiO 2 /Ti 3 C 2 has the greatest photocatalytic performance, and the kinetic constant for degradation methyl orange (MO) was about 3.62 times that of g-C 3 N 4 and 14.55 times that of Ti 3 C 2 , respectively. This work illustrates that g-C 3 N 4 /TiO 2 /Ti 3 C 2 has outstanding potential and offers novel insights for designing and synthesizing new ternary heterojunction materials. Graphical Abstract
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
JOM
·
2025
·
IF 2.3
Liang Yuanyuan,Dou Zhihe,Zhang Ting-an
Upgrading magnesium slag into value-added products provides a significant opportunity to address environmental waste pollution while promoting waste recycling. However, challenges such as the low catalytic activity of the resulting products and limited adsorption of macromolecular organic compounds at surface active sites remain critical engineering hurdles. In this paper, mesoporous g-C 3 N 4 /TiO 2 -MgAl 2 O 4 heterojunction photocatalysts were synthesized by a facile combustion method using magnesium slag, titanium dioxide, and carbamide as raw materials. Photocatalytic experiments on methylene blue solution under visible light irradiation at room temperature showed that the g-C 3 N 4 /TiO 2 -MgAl 2 O 4 heterojunction photocatalyst achieved a 25.6% higher degradation efficiency compared to traditional photocatalysts. This work provides a theoretical framework and practical experience for the value-added and low-cost preparation of photocatalytic materials derived from magnesium slag. Furthermore, a potential enhanced photocatalytic mechanism of g-C 3 N 4 /TiO 2 -MgAl 2 O 4 heterojunction photocatalysts is proposed.
研究领域:
环境科学
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材料科学
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化学工程
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光催化技术
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固体废弃物资源化
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Dong Liang,Yaliang Huang,Fan Wu,Junjun Luo,Xinyao Yi,Jianxiu Wang,Xiaoqing Qiu
A relatively simple and bottom-up method has been developed for the preparation of g-C 3 N 4 /TiO 2 nanocomposites with coexposed {001} and {101} facets. Under acid-assisted hydrothermal conditions, the supramolecular preassembly of triazine precursor was resulted from the coordination of melamine with induced cyanuric acid , and synchronized with the large-scale etching of TiO 2 . Consequently, the g-C 3 N 4 /TiO 2 nanocomposites with coexposed {001} and {101} facets have been prepared via the simple heat treatment process . As the sintered precursor, the self-assembled supramolecules serve as a viable means for simultaneously controlling the compact and uniform contact interfaces between g-C 3 N 4 and TiO 2 . As a result, the obtained samples exhibit excellent visible photocatalytic performance for the degradation of organic pollutants and inactivation of Escherichia coli K-12 as compared to pristine g-C 3 N 4 and TiO 2. The reactive O 2 – and photoinduced holes are found to play the major roles in the photocatalytic behavior due to the energy band structure of the materials. Our results suggest that the self-assembled supramolecules can serve as the sintered precursor to prepare a high photocatalytic performance material on the field of water treatment, and pave alternative synthetic method for composites based on conjugated polymers and metallic compound .
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DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2026
·
IF 8.2
Tong Wang,Wei Jiang,Tao Zhao,Haoxi Ben,Yuanming Zhang,Xiaoli Yang
A visible-light-driven g-C 3 N 4 /TiO 2 heterojunction selectively delignifies raw hemp biomass. • Photogenerated superoxide radicals specifically cleave recalcitrant lignin β-O-4 ether bonds. • The mild ambient and alkali-free process successfully achieves a 69.08 % delignification rate. • This photocatalytic pretreatment preserves cellulose crystallinity and superior fiber strength. The inherent recalcitrance of lignocellulosic biomass, primarily attributed to the dense lignin-carbohydrate complex (LCC), restricts the efficient valorization of plant fibers. Conventional alkaline degumming strategies suffer from high energy consumption, severe pollution, and non-selective cellulose degradation. Herein, a mild, alkali-free pretreatment strategy was developed using a visible-light-driven g-C 3 N 4 /TiO 2 heterojunction to achieve efficient and selective delignification of hemp fibers. Under ambient conditions (30 °C, neutral pH), the system achieved a delignification efficiency of 69.08 % while preserving the cellulose crystallinity (CrI increased to 78.64 %). Crucially, 2D-HSQC NMR and EPR analyses revealed a selective oxidative mechanism: photogenerated superoxide radicals (•O 2 – ) acted as specific nucleophiles, preferentially cleaving the labile lignin β-O-4 ether bonds (from 40.9 % to 13.5 %), while leaving the chemically robust C-C linkages and the cellulose backbone largely intact. Consequently, the pretreated fibers exhibited superior mechanical strength (4.13 cN/dtex) compared to traditional alkaline-treated samples (3.56 cN/dtex). This work provides a sustainable, low-severity paradigm for biomass fractionation, offering fundamental insights into the photocatalytic cleavage of lignin inter-unit linkages. Download: Download high-res image (149KB) Download: Download full-size image
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DOI
PubMed
高影响因子
RSC Advances
·
2025
·Vol. 15
·期 27
·21300-21310
·
IF 4.6
Yu-Ling Qi,Hao-Yu Zhou,Guo-Zhi Han
Self-healing hydrogels have the ability to repair themselves at the incision after being damaged and can return to their original state of morphology and performance. However, constructing a hydrogel with superior mechanical strength and tensile properties after self-healing remains a challenge. In this work, using polyvinyl alcohol, borax, chitosan, and a type of SiO2@g-C3N4@TiO2 nanoparticles as raw materials, a novel photo-regulated self-healing hydrogel was developed using a freezing–thawing method, which could achieve a synchronous increase in Young's modulus and tensile strength under visible light irradiation during the self-healing process. In addition, the doping of the SiO2@g-C3N4@TiO2 nanoparticles improved the self-healing performance of the PVA-based hydrogels. With the addition of a trace amount of SiO2@g-C3N4@TiO2 nanoparticles, the self-healing efficiency of the hydrogel increased from 26.67% to 45.67% in darkness and from 41.33% to 65.67% under visible light irradiation.
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）