INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Ye Zhang,Yutong Wen,Yingying Li,Zhiqi Li,Zhen Wang,Bing Fan,Qiaoyu Li,Wanchen Cai,Ying Li
The infections triggered by bacteria often cause wound deterioration, and the development of safe and effective antimicrobial treatment is always highly desired. In this paper, naturally derived lignin was aminated to generate surface group functionalized lignin nanoparticles (NPs), efficiently loading Ag NPs and adsorbing L-arginine, to construct lignin-based nanoenzyme (SALL), which achieves synergistic antimicrobial treatment by chemodynamic therapy and NO gas therapy, while the dose of silver was decreased. The SALL is dispersed in eco-friendly hydrogel constructed using keratin and chitosan through realigned disulfide bond and diverse intermolecular interactions, the prepared SALL@K/C hydrogel has ideal rheological property, and strong adhesion capacity facilitating active bacteria capture, ensuring that the bacteria were immobilized within the effective range of reactive oxygen species and NO. The inhibition rates of S. aureus and E. coli were 98.5 % and 97.8 %, respectively. Meanwhile, the SALL@K/C hydrogel could achieve the delivery of hydrophobic drug curcumin for inhibiting inflammation. The study highlights a well-designed nanoenzyme-loaded hydrogel with excellent antibacterial, hemostatic, and antiinflammatory properties, offering new ideas for nanoenzyme design and antimicrobial hydrogel development.
研究领域:
生物材料学
·
医学工程
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2018
·
IF 4.841
Yongheng Xiong,Yiqing Zeng,Wei Cai,Shule Zhang,Jie Ding,Qin Zhong
The effects of various factors on the NO removal activity in the (NH 4 ) 2 SO 3 solution were investigated to explore more details and characteristics of the related reactions using full infrared sensor flue gas analyzer (FISFGA). It was found that the conversion yield of NO (9.0%–29.0%) was obviously improved with the increase of gas–liquid contact area, NO residence time and (NH 4 ) 2 SO 3 concentration as well as the adding of CuSO 4 . However, it was mainly limited by gas–liquid mass transfer rate and slightly inhibited by the gas velocity. Moreover, the FISFGA analysis revealed that two nitric oxide (NO) conversion route with different reduction product of N 2 O and N 2 existed simultaneously upon the existence form of SO 3 2− . It was confirmed by the calculations and the experiments of pH factor that the NO reduction steps were based on the following equation: (1) NO + HSO 3 − ⇋ N 2 O + SO 4 2− + H + ; (2) NO + SO 3 2− ⇋ N 2 + SO 4 2− . In this system, Eq. (1) with N 2 O product was the major pathway, but the ratio of Eqs. (2) to (1) was intensified in the presence of CuSO 4 . It is believed that the suitable additives could promote the NO reduction to N 2 furtherly.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Ying Sun,Shuhang Ren,Yucui Hou,Kai Zhang,Qi Zhang,Weize Wu
A series of environmentally benign functional ionic liquids (ILs) based on l-proline as the anion to efficiently absorb low-concentration NO have been investigated in this work. The results indicate that the ILs with an l-proline anion have high absorption capacities for 0.16 vol % NO, reaching a maximum absorption capacity of 0.51 mol of NO per mol of IL at 30 °C and ambient pressure for l-proline choline IL ([Ch][l-Pro]). The absorbed NO could be recovered from [Ch][l-Pro], and the regenerated IL had no significant loss of NO absorption capacity for at least 7 recycles. We verified the mechanism through both experimental and theoretical methods. The results indicate that the absorption of NO in [Ch][l-Pro] mainly resulted from a chemical process—NO and the secondary amine group in the anion form a NONOate with a chemical formula [l-Pro]−–(NO)–NO. We believe that this efficient and reversible absorption of low-concentration NO by the ILs has potential as a new NO capture technique.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
COMBUSTION AND FLAME
·
2023
·
IF 4.4
Yitong Zhai,Qiang Xu,Beibei Feng,Can Shao,Zhandong Wang,S. Mani Sarathy
Low-temperature (low-T) oxidation experiments of n -heptane –with and without NO addition– were experimentally and numerically investigated at stoichiometric conditions in a jet-stirred reactor. Experiments were performed at atmospheric pressure over a temperature range of 500–800 K. Reactants, intermediates, and products, were measured using synchrotron vacuum ultraviolet photoionization mass spectrometry . A detailed kinetic model was developed to gain insight into the chemical effect of NO on low-T oxidation chemistry of n -heptane. Taking 650 K as the transition temperature, the results revealed that NO addition exhibited an inhibiting effect on fuel reactivity below 650 K and a promoting effect above 650 K. The reactions of ROO + NO = RO + NO 2 and HO 2 + NO = OH + NO 2 at different temperature regions were responsible for the inhibition and promotion effects, respectively. Evidence gathered from both experimental measurements and kinetic model predictions indicated that NO addition had a significant inhibitory effect on the formation of cool flame species during the low-T oxidation process. NO suppressed low-T oxidation via the reaction of ROO + NO = RO + NO 2 , which impeded the subsequent isomerization, O 2 addition, OH-, and HO 2 -elimination reaction, and influenced product distribution of the cool flame species. The experimental observations provided detailed information about these reactive intermediates, which offered new insights into low-T oxidation phenomena and clarified the importance of NO reactions which prevent the formation of cool flame products during low-T oxidation.
研究领域:
化学动力学
·
燃烧科学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2016
·Vol. 6
·期 8
·112
·
IF 2.964
Xiaobo Wang,Lei Zhang,Shiguo Wu,Weixin Zou,Shuohan Yu,Ye Shao,Lin Dong
A series of Fe–Ce–Ti catalysts were prepared via co-precipitation method to investigate the effect of doping Ce into Fe–Ti catalysts for selective catalytic reduction of NO with NH3. The NO conversion over Fe–Ce–Ti catalysts was considerably improved after Ce doping compared to that of Fe–Ti catalysts. The Fe(0.2)–Ce(0.4)–Ti catalysts exhibited superior catalytic activity to that of Fe(0.2)–Ti catalysts. The obtained catalysts were characterized by N2adsorption (BET), X-ray diffraction (XRD), temperature programmed reduction (H2-TPR), temperature programmed desorption (NH3-TPD), Fourier transform infrared (FT-IR) spectrophotometry, thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS). The data showed that the introduction of Ce results in higher surface area and better dispersion of active components on the catalyst surface and enhances the amount of surface acid sites. The interactions between Fe and Ce species were found to improve the redox ability of the catalyst, which promotes catalytic performance at low temperature. The XPS results revealed that Fe3+/Fe2+and Ce4+/Ce3+coexisted on the catalyst surface and that Ti was in 4+ oxidation state on catalyst surface. Ce doping increased the atomic ratio of Fe/Ti and Ce/Ti and enhanced the surface adsorbed oxygen species. In addition, Fe(0.2)–Ce(0.4)–Ti catalyst also showed better tolerance to H2O and SO2and up to 92% NO conversion at 270 °C with 200 ppm SO2added over 25 h, which suggests that it is a promising industrial catalyst for mid-low temperature NH3–selective catalytic reduction (SCR) reaction.Keywords:SCR;denitration;catalytic activity;synergistic effect;SO2resistance
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
·
2016
·Vol. 33
·期 12
·3407-3416
·
IF 1.408
Wu Bo,Xiong Yuanquan,Ru Jinbo,Feng Hao
A novel NO removal system is designed, where NO is initially oxidized by •OH radicals from the decomposition of hydrogen peroxide (H 2 O 2 ) over hematite and then absorbed by ammonium-based solution. According to the high performance liquid chromatography (HPLC) profile and the isopropanol injection experiments, the •OH radicals are proved to play a critical role in NO removal. The NO removal efficiency primarily depends on H 2 O 2 concentration, gas hourly space velocity (GHSV), H 2 O 2 feeding rate and reaction temperature, while the flue gas temperature slightly affects the NO removal efficiency. The low H 2 O 2 consumption makes this system a promising technique in NO removal process using wet-method. The evolution of catalyst in reaction is analyzed by scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS), Fourier Transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The nitrite ion and nitrate ion in aqueous solution are detected by the continuous phase flow analyzer. Finally, the macrokinetic parameters of the NO oxidation are obtained by using the initial rate method.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Materials Today Bio
·
2022
·
IF 10.761
Yi Feng,Hanxi Zhang,Xiaoxue Xie,Yu Chen,Geng Yang,Xiaodan Wei,Ningxi Li,Mengyue Li,Tingting Li,Xiang Qin,Shun Li,Fengming You,Chunhui Wu,Hong Yang,Yiyao Liu
Therapeutic approaches of combining conventional photodynamic therapy (PDT) with other adjuvant treatments to sensitize PDT represent an appealing strategy. Herein, a novel synergetic “nanobomb” strategy based on glutathione (GSH)-responsive biodegradation was proposed to effectively destroy tumors expeditiously and accurately. This “nanobomb” was rationally constructed via the simultaneous encapsulation of methylene blue (MB) and l -arginine (L-Arg) into polyethylene glycol (PEG) modified mesoporous organosilicon nanoparticles (MON). The resulting L-Arg/ [email protected] initially exhibited prolonged blood circulation, improved bioavailability, and enhanced tumor accumulation in mice after tail vein injection according to the pharmacokinetic investigations, before the nanoparticles were entirely excreted. Under laser irradiation, L-Arg/ [email protected] produced remarkable reactive oxygen species (ROS) directly for PDT therapy, while a portion of ROS may oxidize L-Arg to generate nitric oxide (NO) not only for gas therapy (GT) but also serve as a biological messenger to regulate vasodilation to alleviate the tumor hypoxia. Subsequently, the rapidly released NO was further oxidized to reactive nitrogen species, which together with ROS promote immunogenic cell death by inducing G2/M cell-cycle arrest and apoptosis in cancer cells, and eventually resulting in enhanced anti-tumor immune responses. Moreover, the GSH depletion in tumor tissues induced by L-Arg/ [email protected] biodegradation can cooperate with GT to amplify the therapeutic effect of PDT. These results demonstrate that this “nanobomb” provides new ideas for clinical translation to treat tumor patients in terms of synergistic PDT-GT nanotherapy in hypoxic-solid tumors.
研究领域:
癌症治疗
·
纳米技术
·
药学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2018
·
IF 3.525
Lei Chen,Ding Weng,Jiadao Wang,Duan Weng,Li Cao
The CeO 2 -TiO 2 (CeTi) and CeO 2 /WO 3 -TiO 2 (CeWTi) catalysts were prepared by a sol-gel precipitation method and their NH 3 -NO/NO 2 selective catalytic reduction (SCR) performance was studied. N 2 O formation and effect of oxygen concentration on SCR performance over CeWTi catalyst were also investigated while varying the NO 2 /NO x ratio. Results indicate that fast SCR behavior of CeWTi catalyst has the best NH 3 -NO/NO 2 SCR performance due to the catalyst reoxidation rate by NO 2 higher than by O 2 . Compared with CeTi catalyst, CeWTi catalyst exhibits higher de-NO x performance under NH 3 -NO/NO 2 SCR conditions. As the CeTi and CeWTi catalysts exhibit similar redox property, addition of WO 3 provides more acid sites which accelerate the reaction between NH 4 NO 3 and NO to get a superior low-temperature activity. Amount of N 2 O formation shows a peak at 250 °C mainly derived from NH 4 NO 3 decomposition.
研究领域:
催化劑科學
·
環境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Hongyu Zhang,Ling Chen,Baogang Xu,Ping Yang
The strong band-to-band visible light absorption obtained by changing the bandgap of photocatalysts is desirable but challenging for TiO 2 . In this paper, a mechanochemical pre-reaction and subsequent heat-treatment process were used to create TiO 2 /g-C 3 N 4 heterojunctions. Acid-treated H 2 Ti 3 O 7 nanobelts and superior thin g-C 3 N 4 nanosheets (CN) were ground evenly and further heat-treated to grow rhombic TiO 2 in situ on the nanosheets. The heterojunctions exhibited a band gap with the absorption in visible light region. Heterojunction formation effective tunes the surface and electronic structures of the composite, resulting in significant decrease of bandgap. g-C 3 N 4 -based heterojunctions (5TCN) exhibited excellent H 2 generation (4991 μmol/g/h) and NO removal. In contrast, a TiO 2 -based composite (95TCN) revealed efficient photo reduction of Cr(Ⅵ) which was 2 times of that of TiO 2 sample and 22 times of that of CN. The photochemical reaction mechanism of TiO 2 and g-C 3 N 4 -based composites was discussed with the ratio of TiO 2 and g-C 3 N 4 . The excellent performance is ascribed to single crystal rhombic TiO 2 nanoparticles grown in situ on g-C 3 N 4 to form well-developed heterojunctions which accelerate the carrier transfer. These results inspire the electronic structure engineering of photocatalysts to improve visible light absorption and provide a magic strategy for excellent photochemical activities.
研究领域:
材料科学
·
环境科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
Green Energy & Environment
·
2022
·
IF 12.781
Yanqin Li,Junqi Tian,Zhisong Liu,Zhongqi Liu,Dong Dong,Fu Wang,Wei Wang,Minmin Liu,Jianming Dan,Yongsheng Li,Feng Yu,Bin Dai,Yunbo Yu
Photo-assisted SCR (PSCR) offers a potential solution for removal of NO at room temperature. MnTiO x as PSCR catalyst exhibits superior performance with NO removal of 100% at the room temperature. Electron paramagnetic resonance (EPR) analysis revealed the presence of numerous oxygen vacancies on MnTiO x . Optical carrier density functional theory (DFT) calculations showed that the three-dimensional orbital hybridization of Mn and Ti is significantly enhanced under light irradiation. The MnTiO x catalyst exhibited excellent electron–hole separation ability, which can adsorbe NH 3 and dissociate to form NH 2 fragments and H atoms. In-situ diffuse reflectance infrared fourier-transform spectroscopy (DRIFTS) indicated that the optical carrier enhanced NH 3 adsorption on MnTiO x , which makes it possess excellent PSCR activity. This work provided an additional strategy to NO removal with PSCR catalysts and showed potential for use in photocatalysis.
研究领域:
环境科学
·
催化化学
·
理论计算化学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2025
·
IF 5.3
Jing Li,Suxia Ma,Nuo Xu
Fly ash, a solid waste rich in silicon (Si) and aluminum (Al), offers significant potential for valorization through the high-value synthesis of zeolites, exemplifying the waste-to-wealth approach. We determined the optimal synthesis conditions for FA-β zeolite using the alkali fusion hydrothermal synthesis method, with fly ash as the primary raw material. The conditions included a NaOH/FA ratio of 1.2, a SiO2/Al2O3 ratio of 30, an H2O/Al2O3 ratio of 1200, a TEAOH/Al2O3 ratio of 14, a β-seed addition of 7.5%, and hydrothermal conditions of 140 °C for 72 h. XRD and FTIR analyses confirmed that the diffraction peaks of the synthesized fly ash-based zeolite align well with the standard pattern of commercial β zeolite. Removal experiments indicated that the efficiency of nitrogen oxides removal hinges on the adequate oxidation of NO. Under optimized conditions, the FA-β zeolite demonstrated a removal efficiency of 83%. ESR analysis revealed that the removal mechanism involves the oxidative elimination of NO, catalyzed by FA-β zeolite through the decomposition of H2O2 to OH radicals. This novel synthesis method, which utilizes fly ash as the raw material to prepare β zeolite, offers advantages in terms of cost-effectiveness and environmental protection. It holds significant potential for applications in environmental conservation.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2019
·
IF 4.309
Fei Rao,Gangqiang Zhu,Mirabbos Hojamberdiev,Weibin Zhang,Shiping Li,Jianzhi Gao,Fuchun Zhang,Yuhong Huang,Yu Huang
Highly exposed active facets and surface oxygen vacancies (OVs) are beneficial for the photocatalytic removal of various harmful organic compounds. In this study, uniform Zn2+-doped BiOI microspheres, assembled by ultrathin nanosheets with highly exposed {001} facets, with OVs were successfully synthesized for NO removal under visible light irradiation. The phase structure and chemical states are analyzed by means of X-ray diffraction and X-ray photoelectron spectroscopy, respectively. The transmission electron microscopy observations reveal that replacing Bi3+ with Zn2+ can lead to the increased exposure of the {001} facets. X-ray photoelectron and electron paramagnetic resonance spectroscopy results confirm that low-state Zn2+ increases the number of OVs, indicating that an increased number of OVs and a reduced thickness of the nanosheets can enhance the photocatalytic activity for the removal of NO. The photo-oxidative removal efficiency of NO over 3%Zn-BiOI reaches 53.6% and remains highly stable (52.9%) for up to 210 min under visible light irradiation. The calculation of interface adsorption confirms that OVs and Zn2+ can not only offer a donor energy level to extend the solar response range but also act as adsorption sites for low concentration of NO and O2 to optimize the transmission capacity of surface charge carriers. Moreover, this work systematically explains the function of OVs and Zn2+ in the adsorption process of NO. The in situ Fourier transform infrared spectroscopy supports understanding of the photo-oxidative removal mechanisms of NO over Zn-BiOI: (i) the byproducts were bidentate nitrites (bi-NO2–), chelate nitrites (ch-NO2–), and bridging nitrites (br-NO3–) in the dark condition and (ii) the final products were bridging nitrites and bidentate nitrites (bi-NO3–) under visible light irradiation. OVs are found to play an important role both in the dark adsorption and photo-oxidative removal of NO by the 3%Zn-BiOI sample.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）