OPTICAL MATERIALS
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2024
·
IF 3.8
Lianke Zhang,Ruidan Zhang,Shuaishuai Zhang,Peng Sun
A composite photocatalyst KCN/LFO was synthesized using K-modified g-C 3 N 4 (KCN) and LaFeO 3 (LFO). The photocatalytic activity of the KCN/LFO was evaluated by degrading indole (heterocyclic organic compound). The KCN/LFO-10 (mass fraction of LaFeO 3 with 10%) displayed the highest removal rate of indole. Indole was degraded to 97.366% after 60 min. The photocurrent and electrochemical impedance spectroscopy (EIS) results suggested that the close correlation between KCN and LaFeO 3 can increasing the efficiency of photogenerated carrier separation. The capture experiment results demonstrated that ·O 2 − and ·OH is primary active substance, respectively. Moreover, the degradation efficiency of KCN/LFO-10 to indole remains stable at 87% after four successive experiments of indole photocatalytic degradation. This work presents an effective method for addressing the pollution caused by heterocyclic organic compound .
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ACS Applied Bio Materials
·
2024
·
IF 4.6
Kai Liu,Qi You,Rohil Jawed,Dong Han,Yufei Miao,Xiang Gu,Junming Dong,Christopher J. Butch,Yiqing Wang
Protective masks are critical to impeding microorganism transmission but can propagate infection via pathogen buildup and face touching. To reduce this liability, we integrated electrospun photocatalytic graphitic carbon nitride (g-C3N4) nanoflakes into standard surgical masks to confer a self-sanitization capacity. By optimizing the purine/melamine precursor ratio during synthesis, we reduced the g-C3N4 band gap from 2.92 to 2.05 eV, eliciting a 4× increase in sterilizing hydrogen peroxide production under visible light. This narrower band gap enables robust photocatalytic generation of reactive oxygen species from environmental and breath humidity to swiftly eliminate accumulated microbes. Under ambient sunlight, the g-C3N4 nanocomposite mask layer achieved a 97% reduction in the bacterial viability during typical use. Because the optimized band gap also allows photocatalytic activity under shadowless lamp illumination, the self-cleaning functionality could mitigate infection risk from residual pathogens in routine hospital settings. Both g-C3N4 and polycaprolactone demonstrate favorable biocompatibility and biodegradability, making this approach preferable over current commercially available metal-based options. Given the abundance and low cost of these components, this scalable approach could expand global access to reusable self-sanitizing protective masks, serving as a sustainable public health preparedness measure against future pandemics, especially in resource-limited settings.
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MATERIALS CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Shizheng Zhang,Hongliang Xu,Qianqian Qin,Chaoning Huang,Yongqiang Niu,Mingliang Li,Bo Song,Bingbing Fan,Gang Shao,Hongxia Lu,Hailong Wang
Vermiculite/g-C 3 N 4 /BiOBr composite (MCVB-X, X = 20, 50, 70, 90) with significantly improved photocatalytic performance was prepared by in-situ growing 20 wt%, 50 wt%, 70 wt%, 90 wt% of BiOBr nanosheets , respectively, on the surface of vermiculite/g-C 3 N 4 composite (MVC). With the increasing of BiOBr content, the photocatalytic performance of MCVB-X composites enhanced gradually. After 180 min of photocatalytic reaction under the visible light irradiation , the degradation rate of tetracycline (TC) by MCVB-50, which contained 50 wt% of BiOBr, reached 91.34 %, which was close to that of pure BiOBr and much higher than those of MVC and bulk g-C 3 N 4 (CN). The reaction rate constant (k) (0.0131 min −1 ) of MVCB-90 was 38.53 times and 6.24 times that of CN and MVC, respectively, which was also greater than that of pure BiOBr nanosheets (0.0098 min −1 ). The main reason for the significant improvement of photocatalytic performance of MCVB-X composites was that the construction of g-C 3 N 4 /BiOBr heterojunction promoted the separation and migration of photogenerated carriers and reduced the recombination rate of photogenerated electron-hole pairs. The agglomeration of BiOBr nanosheets was inhibited and contributed to the adsorption of pollutants. Moreover, the band structure , main active species (⋅O 2 − ) and photocatalytic degradation mechanism were proposed.
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yalai Cen,Yuelan Fang,Xiaokun Li
High blood pressure is a serious condition that increases the risk of stroke and chronic disease. Amlodipine besylate (ADB), a calcium channel blocker, is employed in the management of hypertension. On this basis, the development of an uncomplicated and stable approach for the detection of ADB is very necessary. NiCo 2 O 4 has a strong structural stability, a large specific surface area, while g-C 3 N 4 has rich surface active sites, based on the advantages of both materials. NiCo 2 O 4 @g-C 3 N 4 nanocomposites were fabricated via a triple-stage hydrothermal synthesis-thermal polymerization-high-temperature calcination method, the material allowed for the creation of an ultrasensitive electrochemical sensor to measure ADB. The redox behavior of ADB at modified electrodes was analyzed using cyclic voltammetry and differential pulse voltammetry. Research shows NiCo 2 O 4 @g-C 3 N 4 /GCE composite electrodes are not easily fall off, have good repeatability, high stability, and strong anti-interference. The composite electrode has a highly sensitive signal response to ADB. At optimal parameters, the linear detection range of ADB on the composite electrode is 0.8–70 μM, with a minimum detectable concentration of 0.026 μM. This sensing platform exhibited reliable performance for real-world sample detection. The proposed method establishes an innovative detection platform for ADB, holding great promise for practical applications.
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QUIMICA NOVA
·
2025
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IF 0.7
Meng Shuangyan,Liu Bin,Xie Minglin,Yun Chaoxin,Qiang Jin,He Kaizhou,Yang Zhiwang,Wang Xiangqian
A composite photocatalyst, xTCN (xOTiO2/g-C3N4, where x represents the added quantity of graphite carbon nitride (g-C3N4)), was synthesized using a straightforward one-step hydrothermal method with H2O2 as an oxidant. The H2O2 incorporation into the xTCN composite facilitated the enrichment of oxygen (O) in titanium dioxide (TiO2). This synthesis process effectively reduced the bandgap energy, minimizing the recombination of photogenerated carriers. Concurrently, an O atom was integrated into the g-C3N4 molecule, which altered its bandgap structure and enhanced the photogenerated electron-hole separation efficiency. The dual modification effect was observed when 0.9TCN was used as the catalyst, which converted 77% of benzalcohol with a selectivity exceeding 99%. Additionally, five cycles of reuse only slightly decreased the benzalcohol conversion (by 16%) and selectivity (by 9%), indicating good reusability of the xTCN photocatalyst. The xTCN photocatalyst had an unchanged molecular structure before and after the photocatalytic reaction, demonstrating its superior light stability. The potential photocatalytic reaction mechanism was explored through an active species capture experiment and a Mott-Schottky (M-S) curve test. The results of these studies suggested that •O2- and •OH were the primary reactive species in the photocatalytic reaction.
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MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 12
·1-10
·
IF 5.3
Wang Linhai,Hu Xiao,Yao Guoqing,Chen Qinhua,Wang Sicen
A visual aptasensor based on the combination of graphitic carbon nitride loaded with platinum nanoparticles (PtNPs/g-C 3 N 4 ) and deoxyribonuclease I (DNase I) was developed for detecting acetamiprid. The prepared PtNPs/g-C 3 N 4 exhibited excellent peroxidase (POD)-like activity, demonstrating the capacity to oxidize the colourless o-phenylenediamine (OPD) to produce the coloured product diaminophenazine (DAP) in the presence of hydrogen peroxide (H 2 O 2 ). The DNA aptamer of acetamiprid can adsorb onto the surface of PtNPs/g-C 3 N 4 , thereby inhibiting its POD activity. The binding of acetamiprid to its aptamer results in the aptamer desorbing from the surface of PtNPs/g-C 3 N 4 and subsequent digestion by DNase I. Ascribed to the synergistic effect of these factors, the aptasensor can achieve the rapid on-site detection of acetamiprid based on the acetamiprid-induced the colour change of the solution just with the smartphone. Furthermore, due to the remarkable fluorescence signal of DAP at 570 nm, the aptasensor under fluorescence mode enables highly sensitive and quantitative detection of acetamiprid with a linear range of 1 ng/mL to 4 µg/mL and a detection limit as low as 0.31 ng/mL. The aptasensor has successfully realized the detection of acetamiprid in river water and cucumber samples, offering a novel perspective for the rapid assessment of environmental pollution and food safety risks associated with acetamiprid residues. Graphical abstract
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ChemistrySelect
·
2025
·Vol. 10
·期 32
·e03728
·
IF 2
Yong Rui Wang,Su Dan Bao,Agula Bao,Zheng Ming Li,Bodeligeteng Huang
Graphical This study develops nitrogen-enriched porous carbon materials using chitosan and g-C 3 N 5 through hydrothermal carbonization and pyrolysis. The optimized adsorbent (S200-6) exhibits a high CO 2 adsorption capacity (3.98 mmol/g at 298 K, 1 bar), large specific surface area (2306 m 2 /g), and excellent selectivity (14.3 for CO 2 /N 2 ). Carbon capture and storage are crucial because of the environmental issues caused by excessive CO 2 emissions. Porous carbon is considered the most promising adsorbent. The precise adjustment of the pore structure and surface active sites of samples is necessary to increase their CO 2 adsorption capacity. In this study, chitosan-based N-doped porous carbon materials were developed using g-C 3 N 5 as the self-sacrificial templating agent and N dopant, respectively, via hydrothermal and pyrolytic activation methods. CO 2 adsorbents possessing a large specific surface area (2084–2450 m 2 /g), microporous structure, and N content were synthesized by varying the hydrothermal temperature and g-C 3 N 5 ratio. The maximum CO 2 adsorption capacity of the highest-performing adsorbent S200-6 was 3.98 mmol/g at 298 K and 1 bar. After 10 CO 2 adsorption and desorption cycles, S200-6 retained 94% of its initial adsorption capacity, indicating its excellent reusable stability. This study demonstrates the feasible preparation of porous carbon materials through a combination of g-C 3 N 5 with hydrothermal and pyrolytic activation methods and reveals the application potential of S200-6 as a CO 2 adsorbent.
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NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Limei Yang,Ye Liu,Rongxue Wang,Linqian Hou,Yaling Yang
A K-doped carboxylated polydopamine (PDA) modification of the g-C3N4 (K-g-C3N4@PDA) nanozyme was effectively performed by one-step potassium salt-assisted thermal copolymerization and hydrothermal strategies. K-g-C3N4@PDA showed excellent peroxidase (POD)-like activity, and ferric ammonium citrate (FAC) efficiently promoted the generation of hydroxyl radicals (˙OH). Furthermore, K-g-C3N4@PDA oxidized 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) in the presence of H2O2 to produce a blue-green product, and FAC boosted the POD-like activity with an exceptional linear relationship and low detection limit (0.018 μg mL−1). Importantly, a recovery rate of 94.09–105.17% was attained when the developed method was effectively used to assess FAC in culinary salt samples using a spiking procedure.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Han Zhang,Shuqing Chen,Guodong Zhang,Yongbin Wang,Zichen Cui,Fei Chen,Yukun Du,Guanghui Gu,Tianyu Bai,Changlin Lv,Wenkang Yang,Shiqi Xu,Jianwei Guo,Weiqing Kong,Yongming Xi
Addressing the clinical challenge of spatiotemporal coordination between vascularization and osteogenesis in bone repair, this study develops a composite scaffold system integrating piezoelectric stimulation and controlled drug release to achieve sequential regulation of angiogenesis-osteogenesis coupling. Combining piezoelectric barium titanate/nano-hydroxyapatite/polycaprolactone (BTO/nHA/PCL, BHP) with metformin (Met)-loaded GelMA (G@Met) hydrogels, the BHP/G@Met scaffolds are fabricated through dual-nozzle 3D printing. Material characterization confirms hierarchical porosity, stable piezoelectric output under ultrasound (US), and sustained drug release kinetics aligned with early-phase vascularization requirements. In vitro co-culture models demonstrate enhanced endothelial cell migration and tubular network formation during the initial 7d phase, followed by potent osteogenic differentiation of mesenchymal stem cells at intermediate (14d) and terminal (21d) periods. Dual-animal models reveal superior bone regeneration with extensive neovascularization and osseous tissue infiltration. Transcriptome sequencing and network pharmacological analyses identify PI3K-AKT signaling as the central pathway for BHP/G@Met coordinating sequential angiogenesis-osteogenesis. By synergizing piezoelectric bioelectrical cues with spatiotemporal drug delivery, BHP/G@Met pioneers a chronologically adaptive strategy to match the spatial-temporal bone healing microenvironments, offering a paradigm for dynamic tissue regeneration.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Yinghan Xu,Zi Liu,Hui Dong,Zhaoxia Shi,Xuefei Li,Yaocun Yue,Meng Yuan,Enyuan Zhang,Mengyi Li,Yitong Chen,Miaotian Xu,Yanli Zhou
Herein, we propose an all-DNA self-assembled G-quadruplex/hemin DNAzyme nanosphere (GHN) and apply it to construct an electrochemical biosensor for sensitive detection of kanamycin (KAN). Unlike conventional metal-core-dependent biosensors, the GHN eliminates inorganic components, offering superior biocompatibility, simplified synthesis, and reduced environmental hazards. High loading of G-rich sequences was achieved by performing multiple branches of the hybridization chain reaction on self-assembled DNA spherical core. In addition to exhibiting excellent catalytic performance, the GHN inherently provides a strong current response, facilitating highly sensitive detection of target analytes. Through a one-step displacement reaction triggered by the target, the GHN is captured on the electrode surface, generating a measurable current signal. Under optimal experimental conditions, the electrochemical signal of the proposed sensor showed a good linear relationship with the logarithm of the KAN concentration over the range of 0.1 pM to 1 μM, with a detection limit of 71 fM (S/N = 3). For practical applications, the sensor achieved 93.98% to 102.0% recovery in spiked milk samples, demonstrating its reliability in complex matrices. The target-independent synthesis of GHN allows facile reconfiguration by altering aptamer sequences, enabling universal detection of environmental pollutants and biomarkers. This platform offers a new approach for early monitoring of antibiotic residues, which is expected to provide valuable references for the formulation of relevant environmental protection policies and the safeguarding of human health.
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MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 12
·820
·
IF 5.3
Quang Phan Quang Huy,Khoa Huynh Anh,Nguyen Hoang Cao,Trung Nguyen Tran Nhat,Minh Dang Thanh Cong,Nhung Tran Nguyen Cam,Khoa Tran Dang,Nghia Nguyen Ngoc,Ha Huynh Ky Phuong,Hieu Nguyen Huu
To enable rapid, on-site monitoring of amoxicillin and ensure controlled administration, we have developed a paper-based analytical device (PAD) incorporating a molecularly imprinted polymer (MIP) anchored on graphitic carbon nitride (g-C₃N₄) nanosheets. The MIP@g-C₃N₄ composite was synthesized via in situ polymerization of 3-aminopropyl triethoxysilane (APTES) and tetraethyl orthosilicate (TEOS) around amoxicillin templates on g-C₃N₄, yielding highly specific binding cavities upon template removal. The g-C₃N₄ nanozyme’s intrinsic peroxidase-like activity catalyzes the oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to its blue oxidized form (oxTMB) in the presence of hydrogen peroxide. In the absence of amoxicillin, a vivid blue signal develops, whereas competitive binding of amoxicillin at the MIP sites inhibits nanozyme activity, causing a proportional decrease in color intensity. Analytical characterization demonstrated a linear response over 0–100 µM amoxicillin, with a limit of detection (LOD) of 0.97 µM. The integration with the PAD format permits semi-quantitative visual readout and quantitative determination via a portable smartphone, all within minutes and without the need for complex instrumentation. When applied to spiked milk and tap water, the MIP@g-C₃N₄ sensor achieved recoveries of 92–105% with negligible interference from structurally related antibiotics. The marriage of MIP selectivity, g-C₃N₄ nanozyme catalysis, and low-cost PAD architecture delivers a user-friendly, field-deployable platform for rapid amoxicillin screening, promising significant potential to bolster antibiotic stewardship and mitigate overdose-related health risks across clinical, environmental, and food-safety applications. Graphical
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Caizhen Zu,Xishun Peng,Yi Long,Man Peng,Cunwei Wang,Haili Zhang,Zhangwei Tan,Yuxue He,Zhongchen Bai
Detecting antibiotic residues in food is a critical challenge for food safety assurance. This study developed a surface-enhanced Raman scattering (SERS) sensor based on two-dimensional graphitic carbon nitride (g-C 3 N 4 ) loaded with Au@Ag core-shell nanostructures (g-C 3 N 4 /Au@Ag) for detecting nitrofurantoin (NFT) residues in honey. The g-C 3 N 4 /Au@Ag thin film was fabricated by sequentially depositing g-C 3 N 4 nanosheets, Au nanoparticles, and Ag nanoparticles onto a stainless steel substrate via an electrochemical deposition method. This SERS sensor could synergistically amplify SERS signals by combining the localized surface plasmon resonance (LSPR) from the Au@Ag nanostructures with the charge transfer between the g-C 3 N 4 semiconductor and Au@Ag nanostructures. The optimized SERS sensor achieved an exceptional SERS enhancement factor of 3.8 × 10 6 for NFT in aqueous solutions, with a limit of detection (LOD) of 0.72 nM. Moreover, this SERS sensor could also recognize NFT residues in honey matrices at an LOD of 5 nM. These results provide a novel strategy for the highly sensitive detection of antibiotic residues in food safety monitoring, highlighting its potential for rapid screening of NFT residues in food.
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