C-Journal of Carbon Research
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2024
·Vol. 10
·期 3
·84
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IF 3.9
Khurram Abbas,Haimei Zhu,Weixia Qin,Meiyan Wang,Zijian Li,Hong Bi
Bacterial infections and their increasing resistance to antibiotics pose a significant challenge in medical treatment. This study presents the synthesis and characterization of novel carbon dots (CDs) using levofloxacin (Lf), curcumin (Cur), and tea polyphenols (TP) through a facile hydrothermal method. The synthesized curcumin-tea polyphenol@carbon dots (Cur-TP@CDs) and levofloxacin-tea polyphenol@carbon dots (Lf-TP@CDs) were characterized using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy, confirming their unique structural and chemical properties. Cur-TP@CDs exhibited an average particle size of 1.32 nanometers (nm), while Lf-TP@CDs averaged 1.58 nm. Both types demonstrated significant antibacterial activity, with Lf-TP@CDs showing superior effectiveness againstStaphylococcus aureus(S. aureus) andEscherichia coli(E. coli) in broth dilution and disc diffusion assays. Biofilm inhibition assays revealed a significant reduction in biofilm formation at higher concentrations. The ultraviolet-visible (UV-vis) and photoluminescence (PL) spectral analyses indicated efficient photon emission, and electron paramagnetic resonance (EPR) analysis showed increased singlet oxygen generation, enhancing bactericidal effects. Live and dead bacterial staining followed by scanning electron microscopy (SEM) analysis confirmed dose-dependent bacterial cell damage and morphological deformities. These findings suggest that Cur-TP@CDs and Lf-TP@CDs are promising antibacterial agents, potentially offering a novel approach to combat antibiotic-resistant bacterial infections.
研究领域:
纳米技术
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药学
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材料科学
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微生物学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jiaqiao Yuan,Hongyu Lu,Xiang Gong,Mingjun Chen,Hao Lai,Shuming Wen,Shaojun Bai,Dandan Wu
The development of high-efficiency beneficiation processes for ilmenite has garnered widespread attention. This study proposed the utilize of a heterogeneous Fenton catalytic technology involving H 2 O 2 and Fe 2+ to enhance ilmenite flotation. The flotation results indicated that pre-oxidation of ilmenite with H 2 O 2 -Fe 2+ before adding collector could recover over 80 % of ilmenite from titanaugite. Electron Paramagnetic Resonance and slurry iron component concentration analyses revealed that the •OH generated within the ilmenite-H 2 O 2 -Fe 2+ catalytic system could oxidize Fe 2+ to Fe 3+ . The stronger binding capability of Fe 3+ with NaOL led to a remarkable discrepancy in floatability between ilmenite and titanaugite. Zeta potential analysis further confirmed that the oxidation degree of the ilmenite surface and the adsorption of iron species were higher than those of titanaugite. Additionally, Time-of-Flight Secondary Ion Mass Spectrometry and X-ray photoelectron spectroscopy analyses provided evidence for the selective activation of ilmenite by the H 2 O 2 -Fe 2+ . Furthermore, Density Functional Theory calculations revealed that the stable adsorption of Fe 2+ and Fe(OH) 2 + offered additional active sites on the ilmenite surface for NaOL adsorption. Moreover, the adsorption of •OH significantly affected the electronic spin density of the Fe 3d orbitals of Fe atom in ilmenite, and played a crucial positive in the surface activity of ilmenite.
研究领域:
矿物加工工程
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化学工程
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材料科学
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产品关联
DOI
高影响因子
ACS ES&T Engineering
·
2024
·
IF 7.4
Xiao Ge,Wenjing Li,Jie Wang,Yangfan Yuan,Hongxia Xu,Bin Gao,Shengsen Wang,Xiaozhi Wang,Yuen Wu
The ability of single-atom catalysts (SSCs) to degrade refractory organic pollutants in peroxymonosulfate (PMS)-based heterogeneous catalysis can be compromised due to less diversity in reactive species and unfavorable affinity with PMS. Herein, the as-prepared ternary atomic-scale site catalyst comprising single-atomic Fe/Ce sites and Fe cluster sites (Fe-Ce-BC-900) could completely remove concentrated 4-chlorophenol (4-CP, 40 mg L–1) in aqueous solution within 30 min, 1.20–1.35 times more efficient than Fe SSCs or Ce SSCs. The reactive oxygen species (ROSs) could be highly diversified on the ternary atomic-scale sites because of the Janus mechanisms: the production of nonradicals (1O2) through PMS oxidation and the generation of radicals (SO4•– and •OH) via PMS reduction on the ternary catalytic sites, which accounted for oxidative degradation of concentrated 4-CP. Density functional theory (DFT) calculations indicated that the ternary catalytic sites enhanced the uneven charge distribution and down-regulated the d-band center of Fe-Ce-BC-900 as compared to Fe-BC-900 and Ce-BC-900 catalysts, thereby optimizing the adsorption energy of PMS molecules and promoting electron transfer between metal sites and adjacent oxygen atoms. This study provides valuable insights into the configuration of multicatalytic sites for detoxification of organic-contaminants-polluted wastewater.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Ge Bai,Chunhua Niu,Xuexue Liang,Lan Li,Yulong Feng,Zhong Wei,Kai Chen,Klemen Bohinc,Xuhong Guo
Calcium peroxide (CaO 2 ) is commonly used as a hydrogen peroxide (H 2 O 2 ) donor to eliminate bacterial infections. However, the rapid dissociation of CaO 2 and the explosive release of H 2 O 2 have limited the development of CaO 2 in the antibacterial field. Therefore, a series of silver nanoparticles (AgNPs) functionalized bacteria-triggered smart hydrogels (CSA-H) that integrate sustained release of nanoparticles and localized chemodynamic sterilization were constructed. The pH-responsive hydrogel formed through the Schiff base reaction enables the responsive release of CaO 2 nanoparticles while simultaneously regulating the concentration of H 2 O 2 within the bacterial infection microenvironment. AgNPs are capable of reacting with H 2 O 2 under mildly acidic conditions to produce hydroxyl radicals with enhanced antimicrobial activity. The antimicrobial results demonstrated that AgNPs functionalized silicon dioxide-coated calcium peroxide (CaO 2 @SiO 2 /AgNPs) nanoparticles exhibited enhanced bactericidal activity compared to AgNPs or CaO 2 alone. Furthermore, CSA-H hydrogels exhibited significant antibacterial activity against S. aureus and E. coli under the dual effect of AgNPs and pH-driven Fenton-like reactions. This chemodynamic antibacterial platform is environmentally responsive and provides a promising strategy for creating multifunctional hydrogels loaded with nano-enzymes, thus advancing the development of AgNPs in chemodynamic-antibacterial related applications.
研究领域:
生物医学工程
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纳米医学
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微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2025
·
IF 9.8
Shun Wang,Guoming Sun,Yanzhao Wang,Shuo Tian,Zuoxiu Xing,Wenyu Jiao,Qing Li,Mengke Wang
Precise and convenient detection of azodicarbonamide (ADC) is indispensable for safeguarding food safety and public health. Herein, a new ratio fluorescence strategy was strategically designed for monitoring ADC with excellent sensitivity and strong resistance to interference based on gold nanoclusters anchored cobalt oxyhydroxide nanocomposite (AuNCs@CoOOH). The AuNCs@CoOOH integrated two functions of CoOOH (quencher and mimetic oxidase) and fluorescence property of AuNCs, which can catalyze oxidation of non-fluorescent thiamine to fluorescent thiochrome. Meanwhile, the fluorescence emitted by AuNCs was attenuated by CoOOH via a fluorescence resonance energy transfer, forming a ratio response. Owing to analyte-initiated reduction of CoOOH, the AuNCs@CoOOH recognized glutathione. Coupling with specific reactions of ADC and glutathione, a ratio-based fluorescent platform is devised for sensitive detection of ADC, achieving a detection limit of 0.034 μM. The method proved an effective way for accurately monitoring ADC in flour samples, thereby enhancing its practical utility in ensuring food safety.
研究领域:
分析化学
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食品安全
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纳米材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yao Zhu,Ziyu Yuan,Jian Rong,Tao Zhang,Dongya Yang,Jianming Pan,Fengxian Qiu
Self-propelled nano/micromotors are the frontier of separation materials because they are capable of converting external energy in the surrounding environment into kinetic energy for their autonomous movement. In this work, a bioinspired flower-shaped hierarchical teamed boronate affinity (TBA)-imprinted Pt-free micromotor is introduced based on waste rape pollen as a biotemplate due to its merits of sustainability, rich source and low price. Such micromotor, composed of MnO 2 nanosheets as a catalytic medium, Mg-Al layered double hydroxides (LDH) nanosheets as large surface area substrate and functional surface imprinted polymers as identification subject, exhibits autonomic motor behavior powdered by oxygen bubbles generated by the decomposition of H 2 O 2 and selective recognition and separation for shikimic acid (SA). The hierarchical flower-shaped structure affords more accessible recognition sites for SA, which thus facilitates the separation process. Moreover, in combination with the TBA strategy, the micromotor can precisely recognize the target via boronate affinity between boronic acids and cis -diols from SA while showing strong binding capacity under neutral conditions. Benefiting from the pluripotent role of pioneering boronate affinity-covalent imprinted technique, hydrogen bonds interaction and nanoconfinement effect, the resulting affinity towards SA is evidently enhanced with maximal adsorption capacity of 129.51 mg g −1 at neutral pH in the presence of H 2 O 2 . After five capture/release cycles, the adsorption capacity remains above 85 %. This proposed flower-shaped hierarchical micromotor expands the scope of potential materials for the adsorption of SA and provides a new and promising direction for fabricating adsorbents applied in the separation and purification of natural products.
研究领域:
材料科学
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生物工程
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产品关联
DOI
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
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2025
·
IF 8.4
Yu Deng,Jie Liu,Xiaohui Wu,Tao Zhou,Mingjie Huang
The robust redox cycle of the catalytic center is essential for enhancing sustainable water purification in Fenton-like catalysis. However, the unequal of electron donation and acceptance, especially slow reductive half-reactions, often limit the process. Herein, we developed a photocatalytic heterojunction by integrating cuprous oxide (Cu 2 O) with hexagonal boron nitride (h-BN). The h-BN component acts as an electron sink, promoting electron-hole pair separation and efficient Cu + regeneration. This design enhances peroxymonosulfate (PMS) activation for bisphenol A (BPA) degradation, achieving rate constants 3.79 and 12.22 times higher than Cu 2 O/PMS/Light and Cu 2 O/PMS systems, respectively. Moreover, the formation of the heterojunction optimizes the electronic structure of Cu 2 O by upshifting the d-band center. This results in stronger PMS adsorption compared to pristine Cu 2 O. Enhanced surface binding weakens the O-O bond in PMS, enabling a shift from a nonradical to a mixed radical-nonradical degradation pathway for BPA. This strategy offers an effective approach of heterostructures to modulating both the kinetics and pathways of Fenton-like catalysis for environmental remediation.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2025
·
IF 12.1
Huimin Yi,Chenyi Wang,Baoxin Ge,Fangjie Xu,Pengyang Jiang,Min Zhou,Fangshu Xing,Caijin Huang
Achieving a precise understanding and accurate design of heterogeneous catalysts based on bioinspired principles is challenging yet crucial to digging out optimal materials for artificial catalysis. Here, an ADH-mimicking dual-site photocatalyst (YCuCdS) is developed, and demonstrates the powerful effects of atomic site configuration and proton transfer environments on alcohol-amine coupling. Mechanism studies reveal that the alcohol substrate is effectively dehydrogenated at the Y sites, forming the carbonyl intermediates that rapidly experience condensation with the amine. Meanwhile, the released hydrogen species (H ads ) migrate from adjacent Cu sites to active S atoms, promoting H 2 production and hindering the over-hydrogenation of imine. As a result, a high imine yield of 92% is achieved, along with an H 2 production rate of 7400 µmol g −1 h −1 . This work showcases an effective strategy for the design of heterogeneous catalysts with bioinspiration.
研究领域:
化学工程
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生物化学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yali Song,Ziyan Li,Cairong Yang,Xiaojing Zhang,Qiong Wang,Xiaoyu Wen,Hongzhong Zhang,Long Huang
A simple method for preparing C self-doped g-C 3 N 4 (CCN) was proposed by calcining urea and barbituric acid to effectively degrade sulfamethoxazole (SMX). X-ray photoelectron spectroscopy and element content analysis implied C atom replaced the original position of the bridging N atom to form CCN. Compared to g-C 3 N 4 , the absorption edge of CCN was red-shifted. As a result, the band gap of CCN was reduced, which improved the light absorption capacity of CCN and the separation efficiency of photogenerated electron-hole. Ultimately, the photocatalytic activity of CCN was finally boosted. CCN can effectively degrade SMX under visible light. Among CCN with various C dosage, when 0.05 g of barbituric acid was added in the preparation process, the obtained sample (CCN-0.05) exhibited uppermost degradation efficiency on SMX, which can reach 99.0 % after irradiation for 60 min. Additionally, the first-order kinetic reaction rate constant (0.086 min −1 ) was 8.9 times higher than that of g-C 3 N 4 (0.0097 min −1 ). Electron paramagnetic resonance and trapping experiments showed that the dominant reactive species on SMX degradation were surface ·O 2 − and photogenerated holes by CCN-0.05 under visible light. Moreover, CCN-0.05 can still achieve effective removal of SMX under actual water backgrounds and showed selective degradation on sulfonamides.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Minghao Xu,Mei Qin,Xuerui Yang,Lei Zhou,Hui Liu
In this study, CoCuFe-LDH with SO 4 2− as interlayer anion was prepared by a pot solvothermal method, which exhibited excellent peroxymonosulfate (PMS) activation performance for the degradation of sulfamethoxazole (SMX) over a wide pH range (3.0–12.0). Under the optimal condition, the SO 4 2− -CoCuFe-LDH/PMS system resulted in 99.1 % SMX (10 ppm) degradation in 4 min. Even for 50 ppm SMX, the degradation efficiency and COD removal rate approached 93.3 % and 70.0 % within 10 min, respectively. The current catalyst showed excellent stability after 5 times recycling experiments. The high-valent metal-oxo species were the major reactive oxygen species, and the SO 4 •− , • OH, O 2 •− , and 1 O 2 were involved in the degradation of pollutant. The SO 4 2− interlayer could expand the interlayer spacing of LDH, which facilitated the diffusion of PMS and pollutants within the interlayer and improved the utilization efficiency of the active sites. The current study provided novel insights into the designation of LDH structures in advanced oxidation processes.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2024
·
IF 6.5
Hang Li,Kaisheng Yao,Tianhang Liu,Tianhang Han,Qi Wang,Aozhou Wang,Weiwei Lu
Bimetallic AuPd plasmonic photocatalyst is a promising candidate for catalyzing selective oxidation of aromatic alcohol. However, developing a simple one-step method for the preparation of free-standing AuPd nanostructures with excellent photocatalytic performance remains a huge challenge. Here, a facile liquid–liquid interface route was exploited to one-pot prepare free-standing AuPd alloy nanowires (NWs) under mild conditions. Specifically, Au 1 Pd 1 NWs are grown via oriented attachment at chloroform-water interface and 40 °C with Na 2 PdCl 4 and HAuCl 4 as precursors and 1-naphthol as reductant. Au 1 Pd 1 NWs possess many advantages, such as thin diameter (4.0 nm), large aspect ratio, abundant defects and strong Au-Pd electronic interaction. During benzyl alcohol oxidation to benzaldehyde, Au 1 Pd 1 NWs exhibit excellent photocatalytic activity and durability. At 40 min of visible light illumination, 98 % conversion of benzyl alcohol and 100 % selectivity to benzaldehyde are finished. After five cycles, Au 1 Pd 1 NWs still maintain high photocatalytic activity. Compared to pure Au NWs, alloying Pd with Au in Au 1 Pd 1 NWs dramatically enhances photocatalytic activity. The results indicate that the generated abundant •O 2 – under illumination play an important role in significantly improving benzyl alcohol oxidation to benzaldehyde.
研究领域:
材料科学
·
催化化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ANALYTICAL CHEMISTRY
·
2024
·
IF 6.7
Mei Li,Ling Zhang,Wei Liu,Yan Jin,Baoxin Li
Oxygen vacancy (Ov) is known to act as an active center of the metal oxide. Quantification of surface Ov is vital for understanding the quantitative structure–activity relationship. Facile quantification characterization of surface Ov is highly desirable but still challenging. In this study, we presented a simple colorimetric method for rapidly quantifying surface Ov. As an example of metal oxide nanoparticles, Co3O4 was used to catalyze the 3,3′,5,5′-tetramethylbenzidine (TMB)-H2O2 colorimetric reaction. It was found that the absorbance of the TMB-H2O2 system was dependent on the surface Ov amount in Co3O4. The investigation of the mechanism showed that the Ov-dependent absorbance would be attributed to the activity of surface Ov to easily adsorb and dissociate H2O2 into a hydroxyl radical (•OH). The absorbance signal of the TMB-H2O2 system acted as a probe to estimate the surface Ov. This colorimetric measurement could be completed in less than 20 min. The Ov concentrations obtained by the proposed colorimetric method matched well with those obtained by X-ray photoelectron spectroscopy. This method does not require any complex operation and expensive equipment and can be performed in any ordinary chemical laboratory. So, this colorimetric method is expected to become an alternative approach for quantifying the surface Ov in metal oxide nanoparticles. This method will provide essential insights into the rational design and application of Ov.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）