BIOSENSORS & BIOELECTRONICS
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2017
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IF 7.78
Haiyan Wang,Chunling Qi,Wenhuan He,Minghui Wang,Wenjing Jiang,Huanshun Yin,Shiyun Ai
A novel, simple and sensitive photoelectrochemical (PEC) immunosensing platform was constructed for detecting N 6 -methyladenosine (m 6 A) based on the carboxylated CN and avidin functionalized [email protected] 2 (ARS) nanocomposite . Herein, the N 6 -methyladenosine-5′-triphosphate (m 6 ATP) was selected as the detection target molecule, m 6 A antibody was used as recognition unit for m 6 A, the carboxylated g-C 3 N 4 (CN) was not only used as the photoactive substance, but the substrate for the m 6 A antibody immobilization , ARS was synthesized and used as signal amplification unit to improve the photocurrent of CN, Phos-tag-biotin was employed as bridge of m 6 ATP and [email protected] 2 through the specific interaction between phosphate group of m 6 ATP and Phos-tag, biotin and avidin, respectively. Under the optimal condition, the fabricated PEC biosensor showed a linear range of 0.01–10 nM and high detection sensitivity with low detection limit of 3.23 pM for m 6 ATP. Besides, the developed strategy was also successfully applied to evaluate the content of m 6 A in human serum samples.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
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IF 9.446
Lin Lin,Chunchao Hou,Xuehua Zhang,Yanjie Wang,Yong Chen,Tao He
Photocatalytic reduction of CO 2 into value-added chemicals is particularly attractive as it could produce renewable energy and capture greenhouse gas. Photoreduction of CO 2 can be realized over molecular and inorganic catalysts. The former usually exhibit high activity, but low stability and often inactive under visible-light irradiation; the latter has low activity, but good stability. Here we use g-C 3 N 4 nanosheets as the photosensitizer to integrate with Fe tetra(4-carboxylphenyl)porphyrin chloride (FeTCPP) molecular catalyst. Besides π-π stacking between tri- s -triazine unit and porphyrin , the carboxyl group modified Fe porphyrin is used for the first time in CO 2 photoreduction so as to form hydrogen bonding with the rich amino groups in g-C 3 N 4 nanosheets. g-C 3 N 4 /FeTCPP heterogeneous catalysts are prepared via a facile self-assembly approach, in which light harvest is separated from catalysis spatially and temporally. The obtained g-C 3 N 4 /FeTCPP heterogeneous catalysts exhibit high activity for CO 2 reduction under visible-light irradiation, with CO yield of 6.52 mmol g −1 in 6 h and selectivity up to 98%. Fluorescence data indicate that the electrons can efficiently transfer from the g-C 3 N 4 nanosheets to FeTCPP. The mechanism for CO 2 reduction over the g-C 3 N 4 /FeTCPP heterogeneous catalysts is proposed based on the results of quasi in-situ ESR and UV–vis measurements. This work may pave a facile approach for fabricating the high-efficient photocatalysts for CO 2 reduction, as well as better understanding the related mechanism.
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TALANTA
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2024
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IF 5.6
Kaida Kuang,Yao Lu,Yang Chen,Pei Zhang,Nengqin Jia
The traditional luminol electrochemiluminescence (ECL) sensing suffers from low signal response and instability issues. Here, an Au/ZnCuS double-enhanced g -C 3 N 4 -supported luminol ECL aptasensor is constructed for the sensitive detection of human mucin 1 (MUC1). In this platform, g -C 3 N 4 of a large specific surface area is beneficial to load more luminol illuminants. Au nanoparticles promote the decomposition of H 2 O 2 coreactants to generate more reactive oxygen (•OH and O 2 • − ) intermediates, while ZnCuS can immobilize the aptamer and simultaneously catalyze H 2 O 2 decomposition, realizing the double-wing signal amplification. Under optimal conditions, this sensor shows a good detection capability within 1.0 × 10 −4 –1.0 × 10 3 ng mL −1 and a low detection limit of 5.0 × 10 −5 ng mL −1 , as well as ideal stability, selectivity, and reproducibility. This double-enhanced aptasensor highlights a new signal-enhancement approach for early biomarker detection.
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DIAMOND AND RELATED MATERIALS
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2024
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IF 4.3
Tianyi Cui,Yuan Zhang,Mingxia Tian,Yumin Yan,Guyu Zhang,Tao Zhang,Jianbo Zhao,Jianhui Jiang
In this study, agricultural waste cotton stalk was used as biomass carbon source, calcined with TiO 2 at a high temperature, deposited in a TiO 2 lattice, and used as an electron acceptor to inhibit photogenerated electron recombination. Subsequently, it underwent secondary calcination with g-C 3 N 4 to form a C-TiO 2 /g-C 3 N 4 composite catalyst. Experimental results showed that the coupling of carbon-doped TiO 2 and g-C 3 N 4 accelerated photogenerated electron–hole pairs pair migration, effectively inhibited the recombination of photogenerated carriers, and thus improved the removal efficiency of methylene blue (MB) and tetracycline hydrochloride (TC). Upon irradiation with a 500 W xenon lamp, the degradation rates of MB and TC achieved were 92.6 % and 95.3 % in 90 min, respectively.
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APPLIED SURFACE SCIENCE
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2025
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IF 6.9
Yongqi Mu,Ran Tao,Yanxin Wang,Yongming Lv,Jiale Li,Tianyang Piao,Xiaoxing Fan
Photocatalytic nitrogen fixation presents a promising method for low-energy and environmentally friendly ammonia production. However, efficiency remains relatively low due to insufficient proton and electron supply during the photocatalytic process. In this study, ZnWO 4 /g-C 3 N 4 S-scheme heterojunction nanofibers are prepared by electrospinning combined with vapor deposition method. The ZnWO 4 /g-C 3 N 4 nanofibers are rich in oxygen vacancies and heterovalent W ions, which work synergistically to protonate water molecules, thereby providing the necessary protons for nitrogen fixation. The matched energy band structures of ZnWO 4 and g-C 3 N 4 form a built-in electric field at contact interface, which effectively separate photogenerated carriers. The one-dimensional nanofiber structure induces the carrier transport along the fiber axis and shortens the diffuse distance for carriers to active sites. As expected, the maximum photocatalytic nitrogen fixation performance of ZnWO 4 /g-C 3 N 4 reaches 144.5 μmol·L -1 ·min −1 ·g −1 , which is 19.5 times higher than that of single-component g-C 3 N 4 . After five cycles of experiments, the performance is 90.8 % of the original, showing significant stability. ZnWO 4 /g-C 3 N 4 also exhibits excellent photocatalytic nitrogen fixation activity and stability in natural river water, with practical application potential. This innovative achievement is expected to be applied in future agricultural production, promoting agriculture towards a greener and lower-carbon direction.
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ACS Applied Materials & Interfaces
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2025
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IF 8.2
Linsen Li,Zhuwei Yang,Hui Xiong,Ming Ma,Riguang Zhang,Zhao Jiang
The NECZ/12H-NECZ (N-ethylcarbazole/dodecahydro-N-ethylcarbazole) system is one of the commercially promising liquid organic hydrogen carriers (LOHCs). However, the dehydrogenation reaction of 12H-NECZ is still the bottleneck of the whole hydrogen storage and release process, possessing a relatively low hydrogen release rate. In this study, one kind of C3N4 (carbon nitride) mesoporous nanosheet material with abundant N vacancies was fabricated by the thermal treatment of trace S-doped C3N4, and a series of Pd-based catalysts were prepared by the impregnation reduction method. The Pd/S0.03-C3N4-Nv550 (treated by S-doped and N) catalyst with abundant N vacancies showcases the most outstanding catalytic performance, achieving a 5.41 wt % hydrogen release amount as well as 81.09% NECZ selectivity at 90 min. Combined with the experimental and computational results, the presence of trace S does not lead to structural collapse of the material and interestingly induces the generation of high concentrations of N vacancies. The N vacancies greatly facilitate the dispersion of loaded metals, offering more active sites; meanwhile, the existence of N vacancy weakens the electronic localization of C3N4 carriers, modulates the electronic structure of active metal Pd, and promotes the activation of reactants and intermediates. What is more, the Pd/S0.03-C3N4-Nv550 catalyst shows excellent stability during long-term cycle tests. It provides some reference values for the design of LOHC dehydrogenation catalysts.
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Inorganic Chemistry Frontiers
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2017
·Vol. 5
·期 2
·481-489
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IF 4.036
Wanbao Wu,Xu Li,Zhaohui Ruan,Yudong Li,Xianzhu Xu,Yuan Yuan,Kaifeng Lin
A TiO2 trapped meso/macroporous g-C3N4 heterojunction (mm-CNT) photocatalyst is fabricated by hydrolysis and sintering of tetrabutyl titanate on meso/macroporous g-C3N4 prepared via a facile hard template method. TiO2 nanoparticles are highly dispersed and some of them are trapped in the pores of meso/macroporous g-C3N4. The photocatalytic performance of mm-CNT is assessed through degradation of Rhodamine B solution under visible light irradiation, which displays much better photocatalytic performance than that over pristine meso/macroporous g-C3N4 and pristine g-C3N4. Based on the characterization results, it is reasonable to believe that the enhanced photocatalytic activity should be attributed to the unique meso/macroporous architecture and heterojunction structure, which results in improved mass transfer and enhances the separation efficiency of exciton dissociation. Besides, an optical simulation is initially utilized to study the optical absorption characteristics of mm-CNT since the optical absorption ability of a photocatalyst is one of the most important aspects influencing the photocatalytic ability. As a result, the enhanced ability of light absorption observed on the heterojunctions should be also favorable to achieve improved photocatalytic performances. On account of the analysis results, a possible photocatalytic mechanism for enhanced visible light photocatalytic activity is proposed.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Xiao Zhang,Menglin Zhang,Xinyuan Li,Baoping Xin,Jie Hao,Jinying Li,Hansheng Li,Dongxiang Zhang,Zijie Wu,Xiyan Xu,Jiatao Zhang
The risk of radionuclide leakage always threats ecological security and human health, making the recovery of uranium from nuclear wastewater a meaningful and urgent issue. However, the low-cost and efficient capture of uranium remains a challenge at present. In this study, a homemade photocatalyst of iron coordinated graphitic carbon nitride (g-C 3 N 4 ) co-doped with phosphorus and oxygen (OPFCN), which was facilely synthesized through a novel one-step thermal polymerization method, exhibited superior photoelectric efficiency and photocatalytic activity towards the photo-reductive capture of uranium(VI). The simultaneous Fe coordination and P/O co-doping in framework of g-C 3 N 4 played a synergistic effect in charge reconstruction, in which electrons migration driven by coordinated Fe and lone electron pairs delocalization from doped P/O enormously increased electron density and enhanced charge transfer, thus effectively promoting the separation of photogenerated charge carriers. The specific surface area, pore volume and average pore size of OPFCN reached 70.2 m 2 ·g −1 , 0.157 cm 3 ·g −1 and 7.78 nm, respectively, exhibiting a trend increasingly beneficial for photocatalytic adsorption and mass transfer with successive introduction of Fe, P and O into original g-C 3 N 4 . With the simultaneous introduction of Fe, P and O, the optical absorption edge underwent a significant redshift and fluorescence emission intensity dropped by 75 % compared to that of CN, demonstrating the enhanced visible light capturing ability and significantly inhibited recombination of photogenerated charge carriers in OPFCN. As a result, a uranium capture rate of over 98 % was achieved with catalyst dosage of only 5:1 at pH 5 with OPFCN, demonstrating its competitive photo-reductive activity towards uranium(VI) uptake compared with previously reported g-C 3 N 4 -based photocatalysts. Meanwhile, OPFCN exhibited remarkable reusability and stability with even over 65 % uranium recovery rate and almost unchanged peak patterns in XRD and FT-IR in fifth reuse recycle. Additionally, it was demonstrated that e − and O 2 •− were the direct active species to realize the photoreduction of uranium(VI) over OPFCN, in which e − played the dominant role. The modification method of simultaneous Fe coordination and P/O co-doping would be expected to effectively promote the utilization of g-C 3 N 4 -based photocatalysts towards photo-reductive recovery of uranium(VI) from radioactive wastewater.
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OPTICAL MATERIALS
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2024
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IF 3.8
Mengyao Xue,Jingwei Han,Xing Dai,Yucai Ge,Yunhua Zhang,Zibin Hai
Cu 2 O–SiC/g-C 3 N 4 composite photocatalysts with excellent photocatalytic performance under visible light were synthesized for the first time via a facile approach combining calcination with hydrothermal reaction. Comprehensive characterization of the synthesized samples encompassing composition, morphology, structure and photoelectric properties was conducted utilizing techniques such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), diffuse reflectance spectroscopy (DRS), photoluminescence spectroscopy (PL), and electrochemical impedance spectroscopy (EIS). Results unequivocally demonstrate successful preparation of the ternary composite through Cu 2 O loading onto SiC/g-C 3 N 4 , evincing markedly elevated activity compared to individual counterparts and binary composites. Notably, in the presence of the prepared Cu 2 O–SiC/g-C 3 N 4 , the degradation rate of methyl orange reached 93.70 % under illumination with a visible LED light rated at 5 W. The notable enhancement in photocatalytic performance of the ternary composites is primarily ascribed to the synergistic effects stemming from the formation of p-n junctions between Cu 2 O and g-C 3 N 4 , alongside the Z-scheme configuration established between Cu 2 O and SiC. Free radical quenching experiments corroborated •O 2 − and h + as the principal redox species mediating the visible light quenching process. This study not only presents a feasible strategy for the fabrication of Cu 2 O-based ternary composites with significantly augmented photocatalytic performance but also delineates a novel avenue for the design and construction of composite photocatalysts facilitating enhanced charge-carrier generation and separation concomitantly.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Weilun Yu,Xing You,Yuanchen Wu,Chuanpeng Li,Qiyao Wang,Xiaohang Yang,Xingbo Bian,Yi Lu
The most promising and environmentally friendly strategy to address the greenhouse effect is to utilize renewable solar energy and semiconductor photocatalytic technology to convert excessive CO₂ into valuable chemicals. However, the unsatisfactory photoreduction activity and product selectivity of pristine semiconductor remain significant barriers to their large-scale industrial application. In this study, graphitic carbon nitride (g-C 3 N 4 ) was selected as a model photocatalyst, and HZSM-5 zeolite with a high Si/Al ratio of 500 was employed to synthesize g-C 3 N 4 /HZSM-5 composite via a simple thermal polymerization method. The incorporation of HZSM-5 zeolite, characterized by its rich pore structure, significantly increased the composite's specific surface area, thereby reducing the transportation distance of photoexcited charge carriers and enhancing photoelectric conversion efficiency. The pore structure of HZSM-5 zeolite facilitated the enrichment of CO 2 , increasing the local reactant concentration. Additionally, the specific pore micro-environment exhibited a lower adsorption strength for the reduction product (CO), preventing its further conversion into undesired by-products. Furthermore, the weak acidity of the micro-environment contributed to the stabilization of intermediates, such as -HCO 3 and -COOH, promoting specific reaction pathways. As a result, the g-C 3 N 4 /HZSM-5 composite achieved high CO 2 photoreduction activity and CO selectivity (>95 %). This work highlights the potential of designing composite photocatalysts with tailored micro-environments for efficient and selective CO 2 photoreduction.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yingkun Shi,Zijun Niu,Argenis Rodas-Gonzalez,Songlei Wang,Yihua Wang,Lingfan Yang
Guanosine 5′-monophosphate (GMP) is an ubiquitous compound in food and contributes significantly to food flavour due to its prominent umami properties. In this study, the development of MXene/g-C 3 N 4 /Au-COOH was synthesised by electrostatic self-assembly. The strong adsorption-catalysis ability of nanocomposites was utilised to attach the GMP to the surface of electrode. The surface morphology, functional groups and chemical bonds were analysed via several techniques, such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), fourier transform infrared (FT-IR), and x-ray photoelectron spectroscopy (XPS). Under the optimised conditions, the GMP concentration detected by the sensor had a linear relationship in the range of 0.1–480 μM (S/N = 3) with a low detection limit of 0.0292 μM. Meanwhile, the MXene/g-C 3 N 4 /Au-COOH/GCE has good selectivity, reproducibility and stability. The applicability of the sensor in meat had been successfully verified by four actual samples (chicken broth, fish broth, pork and beef). This study presented a possible strategy to the field of evaluation of meat flavour.
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MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Hong Zhang,Zhigao Zhang,Longyang Han,Mingqin Zhao,Pengfei Liu,Zhen Luo
Aflatoxin B 1 (AFB 1 ) has seriously threatened human health, so it is vital to construct an efficient detection strategy for AFB 1 analysis. An exquisitely designed ratiometric electrochemical aptasensor for sensitive detection of AFB 1 has been successfully developed in this work. DNA tetrahedral scaffold (DTS) is used to fix the DNA probes, 3D DNAzyme walker is employed to amplify the detection signals, and the composite material AuNP/ZIF-67/g-C 3 N 4 acts as the sensing surface of the detection electrode. In the presence of AFB 1 , the 3D DNAzyme walker induced the release of the oligonucleotide attached ferrocene (Fc) from the detection electrode and is simultaneously grafted the DNA-modified methylene blue (MB) onto the electrode, leading to a seesaw-like ratiometric electrochemical aptasensor. This ratiometric electrochemical aptasensor provides an outstanding AFB 1 analysis in the linear range of 2.0 fg·mL −1 to 1.0 ng·mL −1 with the limit of detection (LOD) 0.67 fg·mL −1 . It provides new idea for the analysis of other contaminants in foodstuffs.
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