CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Xuan Wu,Jiangfu Zheng,Xiaoming Li,Qi Yang,Dongbo Wang,Abing Duan
Design of green and low-cost single-atom catalysts (SACs) with high-performance is key to moving photocatalytic degradation of antibiotics toward applications. In order to achieve SACs for large-scale manufacturing, we prepared ultrathin flake carbon nitride (FCN) by low-energy-consuming physical knockout means, and also applied an in situ growth strategy with stable and easy-operating effect to anchor the Ru element on FCN in the form of single atom. Notably, in the PMS/Vis/0.5Ru-FCN system, the degradation rate of tetracycline achieved 100 % in just five minutes, with an apparent rate constant of 0.236 min −1 . Ru-FCN exhibits selective and stable determination due to narrow bandgap, unique photoresponsivity and low photogenerated carrier complexation rate. Mechanism investigation reveal that Ru-N 4 sites accelerated the electron transfer between Ru-FCN and PMS, while the low oxidation state of Ru elements reduced the risk for metal corrosion. DFT calculations predict the attack sites of reactive oxygen species. This work provides a rational explanation for the charge transfer and resistance to external disturbance by Ru single atom, and it also provides a new direction to enhance the efficiency of water treatment.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Yanli Li,Mei Chen,Xinyi Sun,Minliang Zhang,Jinning Wang,Daqian Jiang,Ruobin Dai,Junjian Zheng,Xin Wang
Fouling, particularly biofouling caused by microbial adhesion and subsequent biofilm formation, limits the widespread applications of membrane-based technologies. Although integrating contact-killing agents ( i.e., quaternary ammonium compounds, QACs) to fabricate antibiofouling membranes has been proven as an effective approach to mitigate this issue, the long-term effectiveness of the modified membranes after foulants covering remains a challenge. Herein, hydrophilic photocatalyst nanosheet g-C 3 N 4 (NCN) was introduced into QAC-modified ultrafiltration (UF) membranes to address this limitation. Results showed that the hydrophilic surface of NCN can improve the antiadhesion properties of hydrophobic QAC modified membranes. Moreover, NCN can degrade organic and inorganic pollutants on QAC modified membrane surface under visible light, thereby restoring the antibacterial ability of QAC. Furthermore, the composite QAC/NCN modified membrane demonstrated long-term stability with sustained remarkable antibacterial performance even after numerous fouling-chemical cleaning cycles. These findings underscore the efficacy of the synergistic integration of contact-killing bactericidal activity and photocatalysis as a versatile and promising solution for combating biofouling, thereby contributing to the advancement of membrane technology in environmental remediation applications.
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DALTON TRANSACTIONS
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2018
·Vol. 47
·期 12
·4360-4367
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IF 4.099
Erbing Hua,Gang Liu,Guan Zhang,Xiaoxiang Xu
Separation of photo-generated electron–hole pairs plays a crucial role in determining the practical performance of semiconductor photocatalysts. Here we have successfully fabricated two dimensional g-C3N4/Ba5Ta4O15 nanosheet heterostructures through an in situ urea degradation method. The so-formed nanosheet heterostructures demonstrate superior photocatalytic activities in H2 evolution reactions over individual component. Further analysis using photoelectrochemical measurements suggests efficient charge separations at the interfaces of these heterostructures which contribute to a prolonged lifetime of photo-generated charges as well as the much enhanced photocatalytic activities. The in situ fabrication method adopted in this work ensures a firm anchorage of g-C3N4 onto Ba5Ta4O15 nanosheets and a face-to-face contact between these two semiconductors. Such a peculiar microstructure is critical to the high photocatalytic activity and apparently outweighs the conventional ones that involve only physical mixtures of two semiconductors and a point-to-point contact.
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JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
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2014
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IF 3.679
Zhongkui Zhao,Hongling Yang
The selective hydrogenation of nitroarenes to their corresponding aryl amines has been investigated over the supported nickel propoted tungsten carbide catalyst on polymeric mesoporous graphitic carbon nitride (Ni–W 2 C/mpg–C 3 N 4 ) in the presence of Lewis acid. The Ni–W 2 C/mpg–C 3 N 4 is demonstrated much higher catalytic activity and selectivity for the selective hydrogenation of nitrobenzene than the supported Ni–W 2 C catalyst on activated carbon (Ni–W 2 C/AC) and mesoporous carbon (Ni–W 2 C/CMK-3), and the developed Ni–W 2 C/mpg–C 3 N 4 also exhibits excellent catalytic properties for the selective hydrogenation of various substrates comprising the extra reducible functionalized groups besides nitro group to diverse functionalized arylamines, industrially important compounds, offering more than 92% of yield with 100% selectivity, which may be ascribed to the strengthened mass transfer by using mesoporous support, intentified synergistic effect between Ni–W 2 C/mpg–C 3 N 4 and Lewis acid owing to the basicity of mpg-C 3 N 4 , as well as the improved reducibility of NiO-WO 3 and the dispersion of Ni–W 2 C. It can be also found that the developed catalyst could be easily recovered by filtration and recycled many times without visible loss in its catalytic performance. The significantly improved catalytic properties of supported Ni–W 2 C catalyst fabricated by using mpg-C 3 N 4 as a superior carrier in the presence of Lewis acid allows it to be a promising candidate for the clean and highly-efficient synthesis of diverse functionalized arylamines through the selectivie hydrogenation of substituted nitroarenes.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2015
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IF 7.435
Yuanzhi Hong,Yinhua Jiang,Changsheng Li,Weiqiang Fan,Xu Yan,Ming Yan,Weidong Shi
The constructing of direct solid-state Z-scheme heterojunction photocatalytic system has received much attention in environmental purification and hydrogen generation from water. In this study, a novel direct solid-state Z-scheme V 2 O 5 /g-C 3 N 4 heterojunctions were synthesized via a facile in-situ growth strategy for the first time. The photocatalytic performance was evaluated by the degradation of rhodamine B (RhB) and tetracycline (TC) under visible light irradiation ( λ > 420 nm). Results show that the as-synthesized heterojunctions can significantly enhance photocatalytic activity in comparison with pure g-C 3 N 4 and V 2 O 5 . The optimum photocatalytic efficiency of VC1.0% sample for the degradation RhB was about 7.3 and 13.0 times higher than that of individual g-C 3 N 4 and V 2 O 5 , respectively. In addition, the VC1.0% sample as well as can efficiently degrade methyl orange (MO) and methylene blue (MB) under visible light. By further experimental study, the possible for the enhancing photocatalytic mechanism was found to be a direct solid-state Z-scheme heterojunction system based on the active species trapping and electron spin resonance (ESR) experiments, which not only can improve the photogenerated electron–hole pair’s separation but also exhibit a strong oxidation and reduction ability for efficiency degradation of organic pollutants. This work will be useful for the design of other direct solid-state Z-scheme photocatalytic systems for application in energy conversion and environmental remediation.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·122586
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IF 7.5
Wenyuan Yan,Qiwen Zhou,Lele Zhan,Qinghua Liu,Jinquan Xu,Sheng Liu
A flow injection photoelectrochemical (FI-PEC) system for the rapid, sensitive, and continuous detection of copper ions (Cu 2 + ) in aqueous solutions was developed. The PEC system integrates a custom-designed 3D-printed thin-layer flow cell (volume of 390 µL), enabling efficient mass transfer. The PEC sensor is based on a g-C 3 N 4 /TiO 2 heterojunction photoanode, which was synthesized in situ on a fluorine-doped tin oxide (FTO) substrate via hydrothermal and calcination processes. The obtained g-C 3 N 4 /TiO 2 composite has a flower-like array structure and exhibits enhanced photo response under illumination, with a photocurrent density of 0.34 mA/cm 2 . The g-C 3 N 4 /TiO 2 PEC sensor can be efficiently regenerated using EDTA, allowing for multiple detection cycles without significant performance degradation. The system demonstrates a wide linear detection range of 0.1–150 µM, a low detection limit of 0.043 µM, excellent selectivity against common interfering ions, and maintains good stability after 10 h of continuous operation. These results indicate that the FI-PEC system based on the g-C 3 N 4 /TiO 2 heterojunction photoanode has practical application prospects in monitoring copper pollution in natural environments.
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JOURNAL OF CATALYSIS
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2026
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IF 6
Kexin Li,Bin He,Huanghao Ning,Ruiyi Yan,Ruirui Wang,Ruirui Zhang,Ruixia Liu
The highly selective and direct oxidation of cyclohexane to adipic acid (AA) using molecular oxygen under solvent-free conditions represents a “dream reaction” in industrial catalysis, yet is severely hampered by the inherent chemical inertness of C-H bond and the challenging activation of O 2 . Addressing this grand challenge, we report a non-metal heterointerface engineering strategy to construct an advanced B/F-doped h-BN/g-C 3 N 4 heterojunction catalyst (known as BN/CN-BF 4 ) via a facile synergistic ultrasonication and thermal treatment utilizing the ionic liquid. The resulting BN/CN-BF 4 exhibits a powerfully ability to regulate interfacial electronic microenvironment, as evidenced by spectroscopic, electrochemical analysis, and DFT calculations, which reveal a type-II staggered band alignment and an internal electric field (IEF) formation across the heterojunction. This precisely engineered heterointerface achieved a remarkable breakthrough in catalytic performance, yielding a high cyclohexane conversion of 18.8% with an unprecedented selectivity for AA reaching 51.3% (a significant advancement over the typical 3%-5% conversion) in solvent-free system. Mechanistic investigations established a multi-step synergistic catalytic mechanism that B-N sites and H-bonding facilitate the initial C-H bond adsorption and activation; simultaneously, the IEF-driven directional electron transfer and C-F bond formation significantly accelerate the activation of O 2 to generate highly reactive oxygen species, steering the reaction pathway directly towards the terminal product, adipic acid. This work provides a novel strategy for enhancing industrial selective oxidation by manipulating the interfacial electronic microenvironment with IEF, offering a promising route for advanced solvent-free and metal-free selective oxidation catalysts.
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高影响因子
RESEARCH ON CHEMICAL INTERMEDIATES
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2026
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IF 3.3
Liu Yuqi,Ren Qiuxuan,Xu Jiaojiao,Liu Zhenguo,Liu Zhijun,Yan Haiyan,Zhang Gai
Enhanced photocatalytic degradation of dyes in wastewater remains a major focus in environmental research. Herein, a novel spherical binuclear metallophthalocyanine (Zn 2 Pc 2 (EP) 4 ) featuring a planar conjugated structure was self-assembled onto g-C 3 N 4 via π-π stacking interactions. This self-assembly, achieved through a facile “in situ” hydrothermal method, resulted in the construction of a g-C 3 N 4 /Zn 2 Pc 2 (EP) 4 biomimetic photocatalyst. A strong π-π stacking interaction between Zn 2 Pc 2 (EP) 4 and g-C 3 N 4 is evidenced by the red shift of the Q-band absorption peak and the elevated Zn 2p 3/2 binding energy. Furthermore, the luminescence intensity of g-C 3 N 4 /Zn 2 Pc 2 (EP) 4 decreases to 53% of that of pure g-C 3 N 4 , indicating that the π-π stacking interaction promotes the separation of photogenerated electron–hole pairs. The g-C 3 N 4 /Zn 2 Pc 2 (EP) 4 photocatalysts showed good photocatalytic oxidation activity toward methylene blue. The catalytic efficiency of g-C 3 N 4 /Zn 2 Pc 2 (EP) 4 for methylene blue reaches 85.1% after 3h of treatment at room temperature, which is 1.94 times higher than that of pure g-C 3 N 4 . The measured first-order kinetic rate constant is 0.0086 min −1 , exhibiting a 3.44-fold enhancement relative to that of pure g-C 3 N 4 . Mechanistic investigations indicated that the highly reactive intermediate g-C 3 N 4 (e − )/[Zn 2 Pc 2 (EP) 4 ]⁺– * O 2 significantly promoted the photocatalytic oxidative degradation of methylene blue in wastewater. The self-assembled supramolecular g-C 3 N 4 /Zn 2 Pc 2 (EP) 4 offers great potential for developing high-efficiency and environmentally friendly photocatalysts for dye-containing wastewater.
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Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 2
·121761
·
IF 7.5
Bingkun Liu,Juncheng Guo,Siyuan Chen,Yinhan Yang,Beibei Liu,Hongda Huang,Jingtao Zhang,Yonghui Zhang
Highly efficient charge migration and separation are critical for the design of high-efficiency and stable photocatalysts. In our work, novel 2D/2D/2D g-C 3 N 4 /Ti 3 C 2 /SnS 2 heterojunctions were successfully prepared via a simple hydrothermal route combined with electrostatic self-assembly strategy. Compared to single-component (g-C 3 N 4 , SnS 2 ) and binary composite materials (g-C 3 N 4 /SnS 2 , g-C 3 N 4 /Ti 3 C 2 ), the optimized ternary g-C 3 N 4 /Ti 3 C 2 /SnS 2 composite displayed significantly enhanced photocatalytic efficiency and higher kinetic rate constants for the elimination of Cr(VI) and tetracycline (TC). More interestingly, further improved photocatalytic performance was achieved when the composite catalyst was applied to the mixed Cr(VI)/TC pollutant system, with the reaction rate constants being 1.46-fold and 1.06-fold higher than those of single Cr(VI) and single TC systems, respectively. Finally, a Z-scheme charge migration pathway was proposed in the 2D layered g-C 3 N 4 /Ti 3 C 2 /SnS 2 heterojunction, which enabled the expedited electron transfer between g-C 3 N 4 and SnS 2 with Ti 3 C 2 as an electron mediator and boosted the charge separation efficiency. The present work provides a viable way for constructing 2D/2D/2D Z-scheme heterojunction photocatalytic materials, offering great potential for the treatment of complex pollutants in wastewater.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2026
·
IF 9
Jiali Chen,Lijuan Chen,Yuanzhao Huang,Jin Su,Fan Chen,Wei Wang
The excessive reliance on traditional fossil fuels has not only triggered an energy shortage crisis but also caused severe environmental pollution. These pollutants can significant accumulate via the process of bioaccumulation within the food chain, ultimately posing a serious threat to human health. Therefore, the development of efficient and precise water quality monitoring technologies is crucial for the prevention and control of environmental pollution. In this study, a g-C 3 N 4 -FeCoNi layered double hydroxide (LDH) heterostructure material (g-C 3 N 4 -LDH) was successfully synthesized using a one-step hydrothermal method. The formation of an n–n heterojunction between g-C 3 N 4 and LDH facilitates efficient interfacial charge transfer and structural stabilization, which is critical for bifunctional applications. Consequently, the constructed g-C 3 N 4 -LDH sensing platform exhibits good performance in 4-NP detection, with a sensitivity of 0.664 μA·μM −1 ·cm −2 , a linear response range of 5–800 μM, and a low detection limit of 0.67 μM (S/N = 3). Moreover, the platform demonstrates strong resistance to interference and excellent stability. Additionally, g-C 3 N 4 -LDH can completely degrade 4-NP within 10 min, effectively detoxifying the pollutants. This study offers new insights and a solid foundation for the rapid and accurate detection and treatment of water pollutants.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
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IF 6.7
Yujie Fan,Jun Xu,Jing Liu,Luping Feng,Fangrong Zhou,Haoran Li,Jianghong Wang,Enjun Chen,Lixiang Zhang,Hua Wang
S-scheme In 2 O 3 /g-C 3 N 4 heterostructure was prepared for tetracycline hydrochloride (TCH) degradation through in-situ growth of In 2 O 3 nanorods (NRs) onto g-C 3 N 4 nanosheets (NSs) via high-temperature thermal polymerization method. The results show that resulted heterostructure could exhibit varying photocatalytic behaviors under simulated sunlight depending on In 2 O 3 loading ratios. The one with loading ratio of In 2 O 3 to g-C 3 N 4 at 10 wt% could display the best photocatalytic performance with efficiency up to 93.4% within 60 min, which are 2.61-fold and 1.17-fold higher than In 2 O 3 and g-C 3 N 4 . Herein, In 2 O 3 and g-C 3 N 4 components with matched band structures could individually serve as holes quencher and electrons donor to prolong carrier lifetime through in-situ formed interfacial electrostatic field due to their different Fermi levels. An S-scheme heterostructure could thus be engineered to facilitate charge carrier migration while enhancing redox capabilities, ultimately yielding superior photocatalytic performance. Moreover, the developed heterostructure could present superior structure and activity stability. Crucially, it was noticed that • O 2 – and • OH radicals played a major role in TCH degradation and the possible degradation and mineralization pathways as well as toxicity of by-products were explored based on identified intermediate products. These findings underscore that In 2 O 3 /g-C 3 N 4 heterostructure could hold substantial potential for practical environmental remediation applications.
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Journal of Cleaner Production
·
2023
·
IF 11.1
Shen Xu,Jianying Huang,Zengxing Li,Yonggang Lei,Yingzhen Zhang,Kim Hoong Ng,Yuekun Lai
It is very attractive to find a cheap and efficient cocatalyst for enhancing the H 2 generation of graphitic carbon nitride (CN) under visible light. To achieve that, we proposed a novel two-step method to deposit sub-10 nm metallic Ni 2 P particles on the surface of CN sheets for a maximized interfacial contact. Characteristic results confirmed the establishment of ohmic heterojunction upon Ni 2 P-modification of CN, which deemed to be an effective measure to alleviate photo-charges recombination. In addition to facilitating spatial separation of charges, Ni 2 P could also enhance the optical properties of CN while reducing its impedance for interfacial electron shuttling. Better still, the P-end of Ni 2 P is highly electronegative, offering desirable H + -capturing capability for enhanced H 2 generation. These give rise to an improved H 2 production of Ni 2 P/CN composite, optimally at 645.3 μmol g −1 ·h −1 as compared to immeasurable H 2 yielded by the pristine CN. Such photocatalytic performance is even comparable to the Pt-modified CN photocatalyst (640.6 μmol g −1 ·h −1 ). In recyclability test, a notable activity suppression of 33.17% was recorded after four reaction cycles. This can be ascribed to the pronounced photo-corrosion of the Ni 2 P cocatalyst during photoreaction. Nonetheless, a remarkably high H 2 generation (1328.6 μmol g −1 in 3 h) was still attained at 4 th cycle. This justifies the effectiveness of our synthesized Ni 2 P cocatalyst in enhancing H 2 generation of CN under visible light irradiation.
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