CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Bingke Xie,Dongyun Chen,Najun Li,Qingfeng Xu,Hua Li,Jinghui He,Jianmei Lu
Previously, many methods have been used to reduce NOx pollution. Semiconductor photocatalytic oxidation technology has been widely used among those methods because of its environmental friendliness, high efficiency, and simple implementation. Hybrid halide perovskites with exceptional optical properties prove to be promising photocatalysis material; however, their high surface energy, unpaired bonds, and instability are obstacles to large-scale application. In this work, FAPbBr 3 /g-C 3 N 4 heterostructures were successfully synthesized by growing FAPbBr 3 nanocrystals on 2D g-C 3 N 4 nanosheets. Compared with the pristine elements, FAPbBr 3 /g-C 3 N 4 composites show significant NO removal efficiencies under 600 ppb concentration at room temperature. The high performance could be attributed to the formation of a type-II heterojunction and accelerated the separation and transfer of electrons and holes. Furthermore, cycling experiments and XRD results verify that the FAPbBr 3 /g-C 3 N 4 heterojunction owns good stability. Thus, this work not only shows the great potential prospect of halide perovskite for the photocatalysis field, but also demonstrate its promise in solving energy issues and environment science.
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高影响因子
ANALYST
·
2020
·Vol. 146
·期 2
·502-508
·
IF 3.978
Changping Wang,Fubing Xiao,Qianshan Chen,Shihong Wang,Jun Zhou,Zhaoyang Wu
A simple penicillinase functionalized two-dimensional photonic crystal hydrogel (2DPPCH) biosensor was developed for colorimetric detection of penicillin G and penicillinase inhibitors. The penicillinase can specifically recognize penicillin G and catalyze it to produce penicilloic acid, which decreases the pH of the hydrogel microenvironment and shrinks the pH-sensitive hydrogel. The particle spacing decrease of the 2D photonic crystal array induced by the hydrogel shrinkage further causes a blue-shift in the diffraction wavelength. While the hydrolysis reaction is repressed upon treatment with clavulanate potassium (a kind of penicillinase inhibitor), no significant change in the diffraction wavelength is found. The detection of targets can be achieved by measuring the Debye diffraction ring diameter or observing the structural color change in the visible region. The lowest detectable concentrations for penicillin G and clavulanate potassium are 1 μM and 0.1 μM, respectively. Moreover, the 2DPPCH is proved to exhibit high selectivity and an excellent regeneration property, and it shows satisfactory performance for penicillin G analysis in real water samples.
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高影响因子
JOURNAL OF MATERIALS CHEMISTRY
·
2011
·Vol. 21
·期 21
·7714-7722
·
IF 5.101
Qiang Peng,Xiangju Liu,Yuancheng Qin,Jun Xu,Mingjun Li,Liming Dai
A series of low band gap copolymers consisting of electron-accepting pyrazino[2,3-g]quinoxaline (PQx) and an electron-donating indolo[3,2-b]carbazole and thiophene units have been designed and synthesized by Stille coupling polymerization. Their optical and electrical properties could also be facilely fine-modulated for photovoltaic application by adjusting the donor/acceptor ratios. UV-vis measurements showed that increasing the content of PQx units led to enhanced absorption. The band gaps obtained from UV-vis spectra, CV scanning, and DFT modeling all indicated a narrowing band gap with increasing the PQx content in the copolymer structure. The photovoltaic solar cells (PSCs) based on these copolymers were fabricated and tested with a structure of ITO/PEDOT:PSS/copolymer:PCBM/Ca/Al under the illumination of AM 1.5G, 100 mW cm−12. The best performance was achieved using P3/[70]PCBM blend (1 : 3) with Jsc = 9.55 mA cm−2, Voc = 0.81 V, FF = 0.42, and PCE = 3.24%, which is the highest efficiency for the PQx and indolo[3,2-b]carbazole based devices. The present results also indicate that the efficient photovoltaic materials with suitable electronic and optical properties can be achieved by just fine-tuning the ratios of the strong electron-deficient accepters and large-π planar donors.
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高影响因子
CATALYSIS TODAY
·
2018
·
IF 4.667
Shuanglong Ma,Sihui Zhan,Yuguo Xia,Pengfei Wang,Qianlei Hou,Qixing Zhou
The Ag/ZnO/g-C 3 N 4 composite photocatalyst, which was synthesized by thermal polymerization of a melamine precursor combined with solvothermal reaction, was used as a visible-light-driven biocide toward Escherichia coli ( E. coli ). The Ag/ZnO/g-C 3 N 4 composite displayed considerably increased visible-light-driven bactericidal activity compared to g-C 3 N 4 , Ag/g-C 3 N 4 , and ZnO/g-C 3 N 4 powders. The photocatalytic destruction of E. coli cells was verified by fluorescence-based cell live/dead analysis and SEM. The mechanism of increased bactericidal effect was studied by UV–vis diffuse reflectance spectroscopy, photoluminescence spectroscopy, photocurrent response, and electrochemical impedance spectroscopy (EIS). The enhanced photocatalytic bactericidal effect was attributed to the matching conduction band levels of g-C 3 N 4 and ZnO and the surface plasmon resonance (SPR) effect of Ag nanoparticles, which resulted in enhanced adsorption of visible light, reduced recombination of free charges, and rapid separation and transportation of photogenerated electrons-holes. The disinfection mechanism was investigated using different chemical scavengers and electron spin-resonance spectroscopy (ESR), and indicating the important role of h + and H 2 O 2 . Furthermore, taking into account the bulk availability and better bactericidal effect of Ag/ZnO/g-C 3 N 4 , this work provides a new pathway to develop advanced materials for water disinfection.
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高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 11
·16795-16804
·
IF 0
Li Haiyu,Xu Mingze,Zhang Tingsong
The issue of water pollution has emerged as a formidable challenge, prompting a pressing need for solutions. The utilization of metal nanoparticles with surface plasmon resonance and semiconductor composite photocatalysts is regarded as a highly effective approach to solve this problem. g-C 3 N 4 is an effective catalyst for the degradation of organic pollutants. Its photocatalytic performance is usually enhanced by the use of the noble metal Au Ag. However, the high cost of these materials limits their application. In this study, we present the synthesis of Al NPs/g-C 3 N 4 nanocomposites using the bridging effect of ligands. The characterized of transmission electron microscopy (TEM), X-ray diffractometer (XRD) and ultraviolet-visible spectroscopy (UV-Vis) proved that Al NPs/g-C 3 N 4 with a wider light absorption range were successfully synthesized. The effects of ligands, (glutathione (GSH), glutamic acid (GAG), and cysteine (CYS)), Al diameter (40 to 200 nm) and the ratio of Al to g-C 3 N 4 (1:1 to 5:1) on the photocatalytic degradation of methylene blue (MB) by Al NPs/g-C 3 N 4 were also evaluated. The results showed that the optimum degradation efficiency of Al NPs/g-C 3 N 4 for MB at 5 mg/L reached 100% within 60 min, which was 11 times higher than that of pure g-C 3 N 4 . The principal analysis of Al enhancing the photocatalytic performance of g-C 3 N 4 was studied through transient photocurrent spectroscopy (TPC), electrochemical impedance spectroscopy (EIS), and steady-state transient fluorescence spectroscopy (PL). The results confirmed that hot carriers generated by localized surface plasmon resonance (LSPR) of Al nanoparticles increase the carrier concentration. In addition, the Schottky barrier generated by Al and g-C 3 N 4 could also improve the carrier separation rate and increase the carrier lifetime. This work is expected to solve the problem of organic wastewater treatment and lay the foundation for subsequent research on photocatalysis. Graphical abstract
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xue Bai,Jiangna Xing,Xin Huang,Shiyu Sun,Na Wang,Ting Wang,Hongxun Hao
In recent years, g-C 3 N 4 has shown excellent advantages as a metal-free visible light-responsive catalyst in the field of environmental remediation. However, the pristine g-C 3 N 4 still has drawbacks such as small specific surface area, low visible light utilization and severe photogenerated carrier recombination. In this paper, a 3D spongy g-C 3 N 4 material (SC x ) was prepared using melamine and oxalamide based on the supramolecular self-assembly strategy. The role of oxalamide in the supramolecular self-assembly process and the effect on the morphology of g-C 3 N 4 were investigated and analyzed. The optical and photoelectrochemical properties of materials were studied using UV vis DRS, PL, EIS, etc., and the results indicate that porous structure, the increase of specific surface area and decrease of bandgap are the main reasons for enhanced degradation performance of 3D spongy g-C 3 N 4 . The results show that SC1 exhibits the best degradation rate (reaching 88.8 % within 60 min) and the reaction rate constant (0.0740 min −1 ). In addition, the SC1 has broad applicability to organic pollutants, excellent anti-interference ability and long-term stability. Furthermore, the degradation pathways were proposed using LC-MS and practical aquatic ecosystems experiments evaluated the toxicity of degradation products. Finally, the photocatalytic degradation mechanism was proposed based on free radical capture experiments and ESR spectra.
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高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2025
·Vol. 26
·期 8
·3764
·
IF 4.9
Songjie Fan,Xiaotian Chang,Yan Qiao,Xiaoxiao Zhao,Jiafu Zhao,Heshui Zhu,Yingqian Han,Chao Zhang
G-quadruplex (G4) structures have emerged as critical regulatory elements in viral genomes and represent potential targets for antiviral intervention. In this study, we identified and characterized G4 structures in the unique long (UL) region of the Pseudorabies virus (PRV) genome, highlighting their role as novel antiviral targets. Bioinformatic analysis revealed two guanine-rich regions (R1 and R2) that form stable G4 structures, as confirmed by fluorescence assays, circular dichroism (CD) spectroscopy, and immunofluorescence staining. Notably, these G4 structures exhibit a tandem repeat arrangement, a previously unreported feature in the PRV genome. Epiberberine (EPI), a natural G4-stabilizing ligand, bound to and stabilized these structures, leading to the inhibition of Taq polymerase progression. Functional assays demonstrated that EPI effectively suppressed PRV replication in vitro while having no significant impact on viral entry or release. In vivo, EPI treatment significantly improved survival rates and reduced viral loads in multiple organs, including the brain, heart, lungs, and kidneys of infected mice. These findings provide new insights into the role of G4 structures in PRV replication and demonstrate that EPI exhibits potential antiviral activity by targeting G4 structures.
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DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Lanyu Qi,Guofeng Ma,Ronghui Kou,Ziyao Wang,Hongling Zhang,Yanhong Yang
The Fenton-like process is a highly efficient and widely applied advanced oxidation technology for degrading organic pollutants under dark conditions. However, its development is limited by low H 2 O 2 utilization, incomplete mineralization, and limited optimal pH range. We developed a CoAl-LDH/porous g-C 3 N 4 catalyst via high-temperature thermal polymerization with NH 4 HCO 3 as a dynamic gas template and urea as a precursor. The reaction rate constant of CoAl-LDH/porous g-C 3 N 4 -H 2 O 2 system for degradation of Rhodamine B is 0.0199 min −1 , which is about 1.58 times that of the CoAl-LDH-H 2 O 2 system. Moreover, the catalyst sustained performance over four cycles and maintained high activity in degrading three different substrates. The high catalytic activity is attributed to the rich porous structure of g-C 3 N 4 , the presence of abundant active sites, and the synergistic interaction between the CoAl-LDH and g-C 3 N 4 , which promotes the generation of ·OH, 1 O 2 , ·O 2 − , facilitating pollutant degradation. This study highlights the potential of this CoAl-LDH/porous g-C 3 N 4 -based Fenton-like system for applications in dye wastewater treatment.
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高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2025
·Vol. 39
·期 2
·e7996
·
IF 0
Liang Ma,Xue-Wen Liu,Geng-Jun He,Xia Hu,Yuan-Dao Chen,Song-Bai Zhang
The selective detection of G-quadruplex DNA has the potential to reveal its biological function and provide important information for cancer diagnosis and treatment. Herein, a ruthenium(II) complex containing a two-armed benzimidazole ligand (bimbpy) ( RC1 ) has been developed as a selective luminescence probe toward G4 DNA. RC1 exhibited distinguishable luminescence response to G4 DNA, such as HTDNA, c-MYC, and 22AG. Especially, in the presence of HTDNA, the luminescence intensity of RC1 increased to 6.1-fold. The limit of detection is 30 nM for HTDNA. However, it showed a small change in luminescence intensity against doubled-strand and single-strand DNA. The DNA binding experimental results indicated that RC1 effectively stabilized G4 DNA through hydrogen bonds and π-π stacking. The selectivity of RC1 to G4 DNA might be due to the increase in the rigidity of the two-armed benzimidazole ligand after binding to G4 DNA. Therefore, the design of ruthenium(II) complexes with a two-armed ligand will be an effective method to obtain Ru(II)-based G-quadruplex luminescent probes by adjusting the degree of rigidity of the two arms.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2025
·
IF 8.3
Xu Jia,Zhiqi Song,Jiaqi Zhang,Jiaolong Qiao,Liuxue Zhang,Xiulian Wang,Shuyan Jiao,Guomin Yu
To enhance the hydrogen production efficiency and stability in photocatalysis, a ternary heterojunction composite CdS@Ce-MOF/g-C 3 N 4 was developed by in-situ growth of Ce-MOF and CdS on graphitic carbon nitride (g-C 3 N 4 ). The synthesized composite not only mitigated the photocorrosion of sulfides but also established a stepwise energy-level alignment and built-in electric field within the heterojunction. These structural advantages effectively facilitated the separation of photogenerated electron-hole pairs and suppress their recombination, thereby significantly improving photocatalytic hydrogen evolution performance. Under simulated sunlight irradiation, the composite exhibited a hydrogen production rate of 4953.125 μmol g −1 , which is 7 times higher than that of pristine g-C 3 N 4 . Moreover, the hydrogen evolution rate remained stable with negligible degradation after multiple cycling tests, demonstrating excellent durability. The CdS@Ce-MOF/g-C 3 N 4 composite, with its superior hydrogen generation capacity and robust stability in photocatalytic water splitting, provides a promising alternative for advancing research on high-performance photocatalysts.
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高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Yao Lu,Mengjie Fu,Cheng Cheng,Haocheng Yang,Xinyi Ni,Jiayuan Guo,Shihai Cao
Photocatalytic technology and peroxymonosulfate (PMS) based advanced oxidation technology have been proven to be simple and effective strategies for recalcitrant organic pollutants degradation. In this work, we designed and prepared a coupled photocatalytic and advanced oxidation system for sulfamethazine (SMR) antibiotics degradation. Firstly, a series of Z-scheme Co 9 S 8 /g-C 3 N 4 heterojunction photocatalysts are prepared by a simple two-step method and further work as PMS activators. The prepared Co 9 S 8 /g-C 3 N 4 photocatalysts exhibit a great improvement in electron-hole pairs migration and visible-light response due to heterojunction formation. In addition, the g-C 3 N 4 acts as a substrate to anchor the Co 9 S 8 nanoparticle, which suppresses the Co 9 S 8 leaching and prevents the Co 9 S 8 oxidation. Consequently, the Co 9 S 8 /g-C 3 N 4 /PMS system displayed an improved SMR degradation ability (93 % for Co 9 S 8 /g-C 3 N 4 /PMS vs. 86 % for Co 9 S 8 /g-C 3 N 4 ). After the fourth cyclic degradation experiment, the Co 9 S 8 /g-C 3 N 4 /PMS system still maintained a comparatively high degradation rate. Considering its good properties and better degradation performance, we propose that the synergistic effect of photocatalytic technology and PMS possess a promising prospect for application in environmental treatment.
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高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Hui Zhang,Ziqi Wang,Yahui Ji,Feifei Chen,Fei Wang,Gen Liu
Background Glutathione (GSH) serves as a pivotal antioxidant within biological systems. Dysregulated GSH levels are associated with a spectrum of pathologies, including carcinogenesis, hepatic dysfunction, and neurodegenerative disorders. Developing robust GSH detection methodologies is essential for assessing cellular health, facilitating early diagnosis of disease states, and tracking therapeutic efficacy. Electrochemiluminescence (ECL), which integrates electrochemical reactions with luminescent output, offers low background noise, making it highly suitable for biomolecule analysis. ECL-based GSH assays employing advanced nanomaterials are anticipated to amplify signals at low GSH concentrations, thereby playing a critical role in clinical diagnostics and biochemical research. Results This study presents a novel ECL sensor for the ultrasensitive detection of GSH, utilizing chromium/g–C 3 N 4 –loaded carbon nanospheres (CNs@Cr/g-C 3 N 4 ) composites. Carbon spheres (CNs) and chromium (Cr) can improve the ECL properties of g-C 3 N 4 . However, the ECL signal of CNs@Cr/g-C 3 N 4 is quenched (off-state) due to complex formation with Cu 2+ . Upon GSH addition, the higher coordination affinity between GSH and Cu 2+ partially restores the ECL signal of g-C 3 N 4 (on-state), allowing for quantitative GSH detection. Under optimized conditions, the linear detection range for GSH extends from 5.0 × 10 −9 to 1.0 × 10 −4 M with a limit of detection (LOD) of 3.3 × 10 −10 M (S/N = 3), alongside high selectivity, stability, and reproducibility. More notably, the as-proposed ECL sensor was successfully applied to the quantification of GSH in real drug samples with excellent recovery rates. Signifiance In contrast to traditional techniques for GSH detection, our approach involves a one-time chemical modification of the electrode, eliminating the need for complex probe immobilization steps and streamlining the detection process. Besides, this “off-on” ECL sensing strategy, leveraging Cu 2+ and CNs@Cr/g-C 3 N 4 , offers an innovative approach for developing advanced sensing systems. And this method is user-friendly, cost-effective, holding significant potential for applications in clinical diagnostics and pharmaceutical analysis.
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高影响因子
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