JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
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2024
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IF 3.1
Yanyang Wang,Shanshan Gao,Gege Yang,Wenyi Zhu,Ying Lu,Mengyuan Tan,Yuancheng Peng,Hua Yang,Chunxia Song
A portable platform for the visual determination of F− and Al3+ was developed by combining FeNPs@g-C3N4 nano-enzyme and a smartphone. The FeNPs@g-C3N4 nano-enzyme with excellent peroxidase activity was synthesized through the in situ growth of Fe nanoparticles (FeNPs) on graphite-phase carbon nitride nanosheets (g-C3N4), which could catalyze H2O2 to oxidize TMB to blue oxide (oxTMB). The peroxidase activity of the FeNPs@g-C3N4 nano-enzyme could be inhibited by F−, and then restored by Al3+ because of the coordination reaction between Fe3+/Al3+ and F−. Furthermore, the solution color could be dynamically manipulated by changing the concentrations of F− and Al3+. Under optimal conditions, the developed method gave low detection limits of 2.43 nM for F− and 7.66 μM for Al3+. The cooperation of nano-enzyme and smartphone has greatly shortened the detection time and reduced the cost of detection, providing a new strategy for the on-site and convenient detection of F− and Al3+ in tea, and showed significant application potential in food safety evaluation.
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高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2025
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IF 9
Feng Gao,Jingcun Shao,Yanting Tang,Yajie Tian,Lin Sun,Xin Yu
To address the escalating concerns related to organic pollutions in aquatic environments, there is an urgent demand for exploring an efficient and eco-friendly method for the removal of organic pollutants. In this work, porous Cl-C 3 N 4 (ClCN)and step-scheme (S-Scheme) Cl-C 3 N 4 /WO 3 (ClCN/WO 3 ) composites have been designed and fabricated through a facile calcination approach for tetracycline removal under visible-light irradiation. The synthesized S-Scheme ClCN/WO 3 composites exhibited porous structures, though their visible-light absorption was lower compared to the ClCN and C 3 N 4 samples. The surface areas of the ClCN/WO 3 composites can reach 81.43 m 2 g −1 , significantly higher than that of the ClCN and C 3 N 4 samples. These composites also demonstrated prolonged carrier lifetime and improved charge separation efficiency, primarily due to the formation of S-Scheme heterostructures. Among the prepared samples, the ClCN/WO 3 -2 composite demonstrated the highest photocatalytic activity with a rate constant reaching 0.0547 min −1 , approximately 4.56 times that of pristine C 3 N 4 . Additionally, when applied to tetracycline degradation in simulated seawater, the ClCN/WO 3 -2 composite achieved a rate constant of 0.047 min −1 , outperforming the C 3 N 4 and ClCN samples. Mechanistic studies showed that the S-Scheme heterostructures markedly promoted charge separation and tetracycline degradation. Furthermore, the ClCN/WO 3 composites contributed to a reduced the biological toxicity of the degraded intermediates. This study underscores the immense potential of ClCN/WO 3 composites as high-performance photocatalysts for the photodegradation of organic pollutants under visible-light irradiation.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
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IF 5.4
Yongxing Shang,Jian Xiong,Shuo Chen,Junjie Zhu,Xiaodie Zhao,Bitao Xiong,Xing’ao Li
Acid Orange 7 (AO7) is a recalcitrant contaminant exhibiting persistent resistance to degradation in aquatic environments. Materials based on graphitic carbon nitride (
) demonstrate significant potential in removing pollutants like AO7 through synergistic interactions with oxidants, utilizing their exceptional catalytic properties and high surface area for adsorption. However, their effectiveness is limited by a relatively large band gap, which hinders their catalytic performance. This study reveals that Ni/O dual-doped
(NiOCN) effectively optimizes the structure and catalytic performance of
. Experimental results indicate that the NiOCN/peroxymonosulfate (PMS) system exhibits optimal AO7 degradation performance, achieving 92.3% degradation within 10 min while maintaining 80% efficiency in simulated aqueous matrices. Quenching experiments further identified superoxide anion radicals ( ⋅ O 2 − ) as the predominant reactive species governing AO7 degradation. Using density functional theory (DFT) calculations, we confirmed that Ni/O dual-doping narrows the band gap and boosts catalytic activity. Our findings mechanistically demonstrate that Ni/O dual-doping augments PMS activation performance by introducing impurity energy levels, increasing adsorption sites, and accelerating electron migration kinetics.
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CHEMICAL ENGINEERING SCIENCE
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2025
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IF 4.3
Shaonan Shan,Mai Wei,Liwei Ma,Youqian Wang,Guoqiang Li,Guojie Zhang
Formaldehyde, as a common pollutant in industrial exhaust gases, poses a serious threat to human health due to its highly toxic nature. Therefore, the development of efficient catalysts for formaldehyde removal is of great environmental significance. The accumulation of by-salts in the desulfurization waste stream of coking industry has become a major challenge in environmental protection. This paper used the by-salt ammonium thiocyanate as a precursor to prepare Cu-based g-C 3 N 4 (CN) by impregnation pyrolysis method, and applied it to the efficient catalytic oxidation of formaldehyde. The results showed that CN/Cu-10 %-a exhibited the best catalytic performance, with its specific surface area increasing 2.07 times compared to pure CN. The formaldehyde removal rate reached 98 %, which is 7.38 times higher than before modification, and it decreased by only 7.91 % after six cycles, demonstrating excellent cyclic stability. The improved photocatalytic performance is due to Cu doping, which increases the number of active sites, boosts visible light absorption, and facilitates the separation and transfer of photogenerated carriers. The secondary calcination further optimized the close contact between the metal Cu ions and the semiconductor interface, enhanced the specific surface area and the electron transfer efficiency to the metal Cu ions, and suppressed the charge carrier recombination. This study provides a new strategy and theoretical basis for the resourceful utilization of desulfurization waste liquid and the efficient degradation of formaldehyde.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
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IF 9.7
Yue Sun,Chenrui Zhao,Jin Xu,Yazi Liu,Huan He,Feihu Mu,Wei Zhao,Dan Sun,Shaogui Yang,Cheng Sun
The construction of built-in electric field (BIEF) in heterojunction is an effective strategy to enhance solar-driven hydrogen (H 2 ) production by minimizing charge carrier recombination and improving transport kinetics. Herein, p-type ternary sulfide CuGaS 2 (CGS) and n-type g-C 3 N 4 nanosheets (CN) are integrated to construct a p-n heterojunction through a simple co-precipitation method for photocatalytic hydrogen evolution reaction (HER). In situ X-ray photoelectron spectroscopy (in situ XPS), in situ electron paramagnetic resonance (EPR) and density functional theory (DFT) calculations revealed that differences in Fermi levels and carrier concentrations between CGS and CN induce charge migration following an S-scheme mechanism, which aligned well with the intrinsic p-n junction field. The escalated BIEF effect enhances interfacial band bending, drives efficient charge separation, and promotes directional charge transfer. As a result, the optimized 20CN/CGS photocatalyst achieves a high H 2 evolution rate of 563 ± 5 μmol g cat −1 , approximately 3.3 times that of CGS. Additionally, the 20CN/CGS exhibits photothermal properties with further boosted HER rate of 732 ± 6 μmol g cat −1 at 35 °C, achieving a photothermal conversion efficiency (PCE) of 11 ± 2 %. This indicates its potential for exploitation of thermal heat from solar spectrum. This work provides a promising strategy for designing high-performance p-n heterojunction governed by S-scheme charge transfer to boost solar energy conversion.
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高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2024
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IF 11.2
Changcun Tang,Jiahui Liao,Yanzhe Sheng,Yanhe Xiao,Baochang Cheng,Shuijin Lei
The growth of base-metal-based heterostructures on metal-free carriers is considered an effective strategy for designing low-cost high-efficiency hybrid electrocatalysts with electronic modulation for bifunctional hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), as well as further overall water splitting (OWS). Herein, Ni/Ni 3 N heterostructures with regulable composition are grown in-situ on N-defective graphitic carbon nitride (g-C 3 N 4 ) through a novel ammonia-free topochemical self-nitridation route. Benefitting from the synergetic effect between Ni/Ni 3 N heterointerface and the strong support of g-C 3 N 4 carrier, the as-fabricated Ni/Ni 3 N/g-C 3 N 4 composite performs superior capacity toward both HER and OER in alkaline conditions. The optimal Ni/Ni 3 N/g-C 3 N 4 sample requires low overpotentials for HER (55 mV) and OER (253 mV) to drive a current density of 10 mA cm −2 , along with long-term durability. Furthermore, the constructed Ni/Ni 3 N/g-C 3 N 4 (+||−) electrolytic cell for alkaline OWS can afford a current density of 10 mA cm −2 under a voltage of 1.556 V with outstanding stability.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2024
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IF 20.2
Decai Yang,Qing Ye,Chao Qu,Fanwei Meng,Lanyang Wang,Yongqi Li
Developing photocatalytic hydrogen evolution technology based on graphitic carbon nitride (g-C 3 N 4 , CN) has emerged as a potential solution for the future energy shortage in recent years. Herein, carbon (C) and fluorine (F) co-doping graphitic carbon nitride nanosheets (CFCN) were synthesized via a one-pot co-thermal method without introducing any metal element. Exceptional hydrogen production activity (3.87 mmol/h/g) was achieved by CFCN under visible light irradiation, which was 4.2-fold increase compared to the pristine CN. It could be attributed to the large specific surface area (51.59 m 2 /g) and efficient mass transfer facilitated by the porous sheet-like morphology of CFCN. Additionally, the modification of the band structure and internal charge redistribution were investigated via density functional theory (DFT) calculations, which confirmed there was a unidirectional and fast electron transfer channel from N through the C 4 delocalized large π bond to F. This creative research uncovered the pivotal role of F/C co-doping in enhancing photocatalytic hydrogen evolution efficacy, offering cutting-edge insights into the design of sustainable and eco-friendly photocatalysts based on metal-free CN.
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高影响因子
ACTA PHYSICO-CHIMICA SINICA
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2025
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IF 13.5
Shiyi Chen,Jialong Fu,Jianping Qiu,Guoju Chang,Shiyou Hao
The coronavirus disease 2019 (COVID-19) pandemic has increased the necessity of medical masks, and to date, many waste masks have been discarded without being reprocessed, causing environmental harm. PET, a commonly used plastic product, presents certain hurdles to its natural degradation. In this work, waste medical masks were converted into carbon quantum dots (MCQDs) with blue fluorescence emissions using a simple solvothermal process and then doped into BiOBr/g-C 3 N 4 composite material to construct S-scheme heterojunctions for PET degradation. Density functional theory (DFT) calculations revealed that an interfacial electric field (IEF) was formed between g-C 3 N 4 and BiOBr. The findings demonstrate that the MCQDs, as a cocatalyst for electron transmission and storage, encourage S-scheme heterojunctions to further separate photogenerated electrons and holes. Levofloxacin (LEV) was used as a molecular probe to visually compare the catalytic activities of various catalysts. These catalysts with different photocatalytic activity were then used to degrade PET. The findings demonstrate that the degradation efficiency of PET over the BiOBr/g-C 3 N 4 /3MCQDs in seawater is 39.88 ± 1.04% (weight loss), which is 1.37 times higher than that of BiOBr/g-C 3 N 4 , and also better than those reported in most of the literature. Free radical capture tests, electrostatic field orbital trap high-resolution gas chromatography-mass spectrometry (HRGC-MS), and ultra-performance liquid chromatography-mass spectrometry (UPLC-MS) experiments uncovered and briefly revealed the key products in the photocatalytic degradation of PET, as well as the relevant mechanism of photocatalytic degradation of PET. The degradation products are expected to become precursors for the further production of polymers and medicines, etc . This study offers fresh perspectives for the creation of innovative photocatalysts for the ecologically benign breakdown of PET, which helps to further lessen environmental damage caused by microplastics (MPs) and enhance resource sustainability.
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RENEWABLE ENERGY
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2025
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IF 9.1
Xu Ma,Wei-Wei Yang,Jia-Rui Zhang,Lan-Xin Liang
In this study, g-C 3 N 4 /Ti 3 C 2 MXene composite fabricated through covalent assembly is used as support material for dynamically trapping Co 0.1 Ce 0.1 Ni 0.8 trimetallic alloy (TA), with the goal of facilitating efficient interfacial reactions and ordered energy conversion for dry reforming of methane by photothermal coupling. By synergistically harnessing remarkable photothermal conversion efficiency of Ti 3 C 2 MXene and the robust light absorption capacity of g-C 3 N 4 , the proposed composite catalyst demonstrates a notable enhancement in methane conversion. At 600 °C, a high and stable methane conversion of over 71 % can be achieved under the same conditions. Also, the generalized hydrogen production rates are remarkably higher than those for other existing studies in published literature for temperature ranging from 400 to 600 °C. Besides, the distinctive characteristics inherent in the dynamic photo-thermal-electric-chemical conversion process of methane reforming are uncovered, and herein, the concept of a tri-interface dual-transport operational mechanism is introduced. The present findings can constitute a valuable reference for the gentle and efficient operation of methane reforming processes, as well as the elaboration and optimization of photothermal catalytic systems.
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ENERGY
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2025
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IF 9.4
Jing Fan,Liang Guo,Nan He,Fenhong Song
Utilizing solar energy for photocatalytic hydrogen production provides a promising pathway for sustainable energy conversion. However, the traditional photocatalyst has the defects of excessive charge recombination speed and poor stability. In this work, a series of Si-Sn 3 O 4 /g-C 3 N 4 heterojunction catalysts were synthesized via a facile ultrasonic-assisted thermal treatment method. The optimized Si-Sn 3 O 4 -5/CN composite exhibited a remarkable hydrogen evolution rate of 5295 μmol∙g −1 h −1 under visible light, which is 2.21 and 54 times higher than that of pure g-C 3 N 4 and Si-Sn 3 O 4 , respectively. Extensive characterization (XPS, PL, EIS, etc.) confirmed the formation of a Type-II heterojunction, which significantly promotes charge separation and transfer. Furthermore, the composite demonstrated excellent photocatalytic stability over four consecutive cycles. This work offers an efficient and stable photocatalyst system for solar-driven hydrogen production and sheds light on the design of heterostructured photocatalysts.
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JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Bo Peng,Yue Lu,Jun Luo,Ziling Zhang,Xu Zhu,Lin Tang,Lingling Wang,Yaocheng Deng,Xilian Ouyang,Jisui Tan,Jiajia Wang
A visible light self-powered photoelectrochemical (PEC) aptasensor based on silver chromate particles, graphitic carbon nitride nanosheets and graphene oxide sheets (Ag 2 CrO 4 /g-C 3 N 4 /GO) for the ultrasensitive detection of chloramphenicol (CAP) was reported in this work. g-C 3 N 4 was considered to be the fundamental photoelectric material because of its great oxidation ability of photogenerated hole as well as excellent biocompatibility and low toxicity. However, the narrow light absorption range and rapid carrier recombination rate limit the application of pure g-C 3 N 4 . Herein, Ag 2 CrO 4 and GO as photosensitizer were introduced to improve the photoelectric properties of g-C 3 N 4 . The photocurrent of the developed ternary composite was about 3 times higher than that of pristine g-C 3 N 4 , which proves it can be used as a suitable photoelectric active material. Moreover, the mechanism of Z-scheme electron transfer path was proved by density functional theory (DFT) calculation. The fabricated PEC aptasensor exhibited high sensitivity toward CAP with a wide liner response of 0.5 pM to 50 nM and a detection limit of 0.29 pM. The specific recognition mechanism and excellent sensing performance indicated this aptasensor could serve as a useful tool for selective and ultrasensitive CAP detection in practical analysis.
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高影响因子
Nano Select
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2024
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IF 0
Zhiyu Zhang,Fei Long,Yanhong Guo,Yunxiao Liang,Jing Wang,Yong Ren
The large-sized nanofilm-constructed hierarchical porous SiO 2 (LNCHPS) is successfully prepared by the dual templating approach and subsequently used as the support for g-C 3 N 4 . A series of characterization techniques are conducted to evaluate the structure and property of the as-prepared materials. The LNCHPS possesses two sets of explicated successive pass-through macropores (0.5–1.0 µm) with large specific surface area. In addition, the macropore wall is constructed by uniform mesoporous nanofilms with the thickness ranging from 35 to 50 nm. Then, the photocatalytic property is investigated by degradations towards Rhodamine B (RhB) under simulated sunlight, in which experiments have been performed through controlling the g-C 3 N 4 loading contents, solution pH values, and photocatalyst dosages. The apparent rate constant of g-C 3 N 4 /LNCHPS could reach 0.03 min −1 under optimum conditions, showing 6.0 times that of the bulk g-C 3 N 4 . In addition, g-C 3 N 4 /LNCHPS also exhibits significantly enhanced performance in H 2 evolution (39.9 µmol h −1 ) compared to that of the bulk g-C 3 N 4 . High light absorption and utilization, enhanced adsorption capability and quick electron hole separation can render this fine structure excellent photocatalytic performance. Our work enables a facile route for large-scale preparation of g-C 3 N 4 /LNCHPS for addressing the wastewater treatment and hydrogen energy production simultaneously.
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