ENVIRONMENTAL TECHNOLOGY
·
2014
·
IF 1.197
Rui-tang Guo,Wen-long Zhen,Wei-guo Pan,Jie-nan Hong,Qiang Jin,Cheng-gang Ding,Shi-yi Guo
CeO2–CuO/Al2O3 catalysts were prepared by three different methods and their activities for selective catalytic reduction (SCR) of NO with NH3 were investigated. As can be seen from the experimental results, the catalyst prepared by the single-step sol–gel (SG) method showed the best SCR activity and resistance to SO2 and H2O. In order to investigate the relationship between the preparation method and the performance of SCR catalysts, the catalysts were characterized by using Brunauer–Emmett–Teller, X-ray diffraction, temperature programmed reduction with hydrogen, temperature programmed desorption with ammonia, X-ray photoelectron spectroscopy, Fourier transform infrared and thermo-gravimetric analysis techniques. It was found that the excellent performance of CeO2–CuO/Al2O3 catalyst prepared by the single-step SG method should be resulted from its large surface area, low crystallinity, high oxygen storage capacity, high NH3 adsorption capacity, high concentration of surface chemisorbed oxygen, weak sulphation process and weak water absorption.
研究领域:
环境科学
·
催化材料科学
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DOI
PubMed
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2025
·
IF 6.2
Yongjia Cheng,Yao Chen,Jianjun Liu,Dongyang Li,Juan Zhang,Chaojie Li,Wen Yang,Zhiwei Lei
Plants release a variety of defensive volatiles in response to biotic stress. The present study examined interactions between Colletotrichum fructicola and the defense volatiles induced by this fungal species in the tea cultivar “Qiancha No. 1”. Analysis of the volatiles emitted from C. fructicola-infected leaves of “Qiancha No. 1” revealed that four volatiles showed a relative content increase of more than 2%. Fungicidal activity assays demonstrated that decanal exhibited the strongest antifungal activity among the four volatiles. Further physiological experiments demonstrated that the antifungal mechanism of decanal was associated with disruption of the cell wall and the membrane. Transcriptome analysis revealed that the genes encoding Chitinase 1, chitin synthase 1, and endochitinase42 were identified as potential targets that may be involved in cell wall degradation by decanal. Additionally, genes encoding cytochrome P450-DIT2 and multidrug resistance protein fer6 were identified as potential targets that may be associated with membrane damage. This study is the first to demonstrate that decanal acts as a direct defense volatile in the interaction between C. fructicola and “Qiancha No. 1,” highlighting its potential as an effective antifungal agent.
研究领域:
植物学
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分子生物学
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真菌学
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DOI
PubMed
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2025
·
IF 11.3
Jianping Sheng,Ye He,Fengyi Zhong,Chenyu Du,Guijie Liang,Xiaodan Ma,Yanjuan Sun,Fan Dong
Photo/electrocatalytic ammonia (NH3) synthesis via nitrous oxide (NOx) reduction is challenged by low NO solubility in electrolytes, inefficient electron and proton supply, and the high cost of separating NH3 from dilute NH4+ product solutions. In this study, we present a continuous, separation-free gas–solid photoreduction strategy for direct NH3 gas production from flue gas, enabled by dynamic band structure regulation of the photocatalyst. Comprehensive in situ characterization and theoretical analysis demonstrate that this approach utilizes photoexcited oxygen vacancies (PVO) in TiO2 to generate high-energy electrons in deep conduction bands, thereby enhancing the reduction capacity, accelerating electron transfer, and lowering the activation energy for both H2O dissociation and NO hydrogenation. The real-time tracking of NO radicals in a gas–solid system using operando EPR provides crucial mechanistic insights into high-energy electron behavior and the NO-to-NH3 conversion pathway, where these high-energy electrons not only promote efficient NO-to-NH3 conversion but also prevent toxic N2O byproduct formation, ensuring selective and efficient reduction. The optimized TiO2–PVO catalyst achieves an NH3 production rate of 79.86 ± 3.48 μmol g–1 h–1 with nearly 100% selectivity, a 16-fold improvement over pristine TiO2. This study offers valuable insights into solar-driven gas–solid NH3 synthesis from flue NOx.
研究领域:
光催化
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环境化学
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材料科学
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化学工程
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可持续能源
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Hongjing Liu,Shan Ren,Xiaodi Li,Qingqing Zhou,Yao Yang,Peng Chen,Shouning Chai,Chi He,Bofeng Bai,Fan Dong
The environmental benefits of photocatalytic oxidation of nitrogen oxides (NO x ) critically depend on the selective conversion of NO to nitrate (NO 3 − ) rather than to toxic by-products like nitrogen dioxide (NO 2 ). However, conventional photocatalysts suffer from low carrier separation efficiency and insufficient generation of reactive oxygen species (ROS), resulting in low selectivity of NO 3 − and high levels of toxic by-products. To address this issue, this study incorporates sulfur into thin-layer Bi 2 MoO 6 to induce charge rearrangement, precisely regulate electron transfer pathways, and promote the generation of targeted ROS. Experimental results showed that the S-doping Bi 2 MoO 6 catalyst exhibited exceptional photocatalytic performance, achieving 71.2 % NO removal efficiency, 93.1 % NO 3 − selectivity, a low NO₂ by-product concentration (43.2 ppb), and good cycle stability. Combining electron spin resonance (ESR) and ROS quenching experiments, the S-doping mediated electron transfer mechanism and ROS dominated by 1 O 2 were revealed, and the synergistic effect between surface electron enrichment and O 2 activation was elucidated. Theoretical calculation indicated that S 2− could act as electron capture centers to promote directional transfer of electrons by the strengthen Bi S covalent interaction, achieving high chemical adsorption activation of O 2 to trigger 1 O 2 generation. This research provides a novel strategy for steering ROS generation through directed electron transfer engineering, advancing the development of efficient and eco-friendly photocatalysts for air pollution remediation.
研究领域:
环境科学
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材料科学
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催化
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物理化学
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纳米技术
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Bing Xu,Feiyang Huang,Zhihui Luo,Changyan Ran
A compact optical fiber sensor based on a no-core fiber (NCF) segment functionalized with a Cu²⁺-imprinted chitosan/polyvinyl alcohol (CS/PVA) film was developed to enable operando on-line monitoring of Cu²⁺ with high selectivity and sensitivity in complex environmental water matrices. The optimal length of the NCF segment was determined to be 1 cm based on simulation and experimental evaluation, under which the highest sensitivity was achieved. The pseudo-second-order kinetic behavior of Cu²⁺ adsorption was first validated by analyzing the time-dependent shift of the interference valley, providing direct spectral evidence of a chemisorption-driven mechanism. A sensitivity of 0.0768 nm/μM and a detection limit of 0.1245 μM were obtained. A rapid response time of less than 20 s and excellent measurement repeatability, with strong specificity toward the target ion and relative standard deviation below 5 percent over five regeneration cycles, were also demonstrated. The sensor was further applied to spiked water samples from the Yangtze River and tap water. By integrating ion-imprinting technology with an optimized NCF-based fiber structure, a portable, cost-effective, and interference-resistant platform has been established for real-time and on-site monitoring of heavy metal ions in complex aquatic environments.
研究领域:
环境分析化学
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光学传感
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重金属检测
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功能材料
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水环境监测
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产品关联
DOI
高影响因子
Advanced Science
·
2025
·
IF 14.1
Qingping Ma,Shunli Fu,Yiming Xia,Shuying Gao,Zhenxing Xia,Panpan Gu,Shijun Yuan,Jinhu Liu,Shuang Liang,Nan Li,Qinglin Yang,Weiwei Mu,Jie Liu,Xinrui Liu,Yongjun Liu,Na Zhang
The effectiveness of antitumor immunotherapy is limited to immune cell infiltration into solid tumors, primarily via T-cell migration through tumor blood vessels. This study introduces a multifunctional nitric oxide (NO)-driven hollow gold Janus nanomotor (HAM) designed to promote tumor blood vessel normalization and increase T-cell infiltration, thereby enhancing the immune response against tumors. It is revealed that self-generated NO facilitates the penetration of HAM into tumors and increases pericyte coverage of blood vessels, thereby enhancing intratumoral T-cell infiltration. HAMs then induce and capture whole-tumor antigens to enhance T-cell activation as an in situ cancer vaccine. Additionally, vascular endothelial growth factor C (VEGFC) is used in combination to induce functional lymphangiogenesis, aiding dendritic cell (DC) migration of tumor-draining lymph nodes (TDLNs). In B16F10 mice, the proportion of tumor-infiltrating T cells increased from 0.5% to 27.4% while that of mature DCs in TDLNs increased from 4.3% to 16.6%, markedly improving tumor-killing effects. Similar outcomes are observed in 4T1 tumor-bearing mice. Collectively, this study highlights the importance of paving the way for intratumoral infiltration of immune cells via nanomotors, which provides a novel idea for enhancing antitumor immunotherapeutic effects.
研究领域:
纳米医学
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肿瘤免疫治疗
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生物医学工程
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药物递送
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肿瘤微环境
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Sixin Zhang,Han Lv,Bin Cui,Dandan Zhou
Conventional Anammox systems using NO₂ − -N as an electron acceptor consistently face challenges of incomplete nitrogen removal due to NO₃ − -N production. Nitric oxide, a key intermediate in nitrogen cycling, presents a promising alternative electron acceptor for Anammox bacteria (AnAOB). To explore its feasibility, this study investigates the effects of NO on nitrogen transformations, microbial community dynamics and metabolic regulation within Anammox systems. Results revealed that NO elicited varied responses among nitrogen-transforming bacteria. Specifically, NO stimulation increased the relative abundance of AnAOB by 20.1 %–40.2 %, while suppressing nitrite-oxidizing bacteria (NOB) and denitrifiers (DNB). Consequently, the NO-dependent Anammox pathway contributed 15.4 % of total nitrogen removal and the NO₂ − -based pathway improved by 49.4 % according to isotope tracing. This shift was attributed to the ability of AnAOB to moderately uptake and efficiently utilize NO, maintaining intracellular NO levels 13.6 %–45.6 % lower than other bacteria, thereby avoiding oxidative stress and enhancing core metabolism. Additionally, NO facilitated ecological niche differentiation, strengthening interspecies cooperation mediated by metabolites, particularly between AnAOB and DNB ( Planctomycetia bacterium , Cyanobacteria bacterium CYA , etc.). Notably, NO supplementation increased NH 4 + -N removal by 1.5–1.9 times, with ΔNO₃ − -N/ΔNH₄ + -N decreasing by 45.2 %–54.8 %. These findings underscore the potential of NO-enhanced Anammox systems for advanced nitrogen removal in wastewater treatment.
研究领域:
环境工程
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微生物生态学
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废水处理
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生物地球化学
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氮循环
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DOI
高影响因子
Advanced Composites and Hybrid Materials
·
2025
·Vol. 8
·期 4
·1-23
·
IF 21.8
Yin Xiujuan,Xue Shuqin,Ji Jiaqi,Zhao Mingyu,Shao Min,Yin Likang,Zhang Saisai,Liu Lei,Li Bin,Zhang Lei,Li Yuan,Wang Xiao
Liver fibrosis (LF) is a leading cause of liver-related mortality worldwide. Although antifibrotic drugs are commonly used in clinical practice, their efficacy remains limited. Excessive reactive oxygen species (ROS) in the fibrotic liver microenvironment play a crucial role in LF progression. Nanozymes, owing to their enzyme-mimicking catalytic activity and antioxidant properties, offer a promising strategy for LF treatment. Vanadium-based nanozymes exhibit ROS-scavenging capabilities and promote fibrosis reversal, while zirconium (Zr)-based metal–organic frameworks (MOFs), such as UiO-66, possess excellent biocompatibility and catalytic activity. However, the therapeutic efficacy of nanozymes is hindered by their intrinsic catalytic limitations. Ultrasound (US), a non-invasive therapeutic modality, has been shown to enhance nanozyme activity and improve treatment outcomes. In this study, we developed a dual-nanozyme composite (UiO-66/V 2 C/L-Arg/pPB, UVLp) with targeted ROS-scavenging and L-arginine (L-Arg) delivery capabilities. Upon ultrasound exposure, UVLp releases L-Arg and nanozymes, facilitating nitric oxide (NO) generation, alleviating oxidative stress, and mitigating liver fibrosis. This work introduces a novel ultrasound-activated nanozyme platform for LF therapy, providing valuable insights for clinical translation.
研究领域:
纳米医学
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肝病学
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诊疗一体化
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生物医学工程
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 13.2
Zequn Lin,Fangrong Tan,Zhanglu Lei,Yangtian Bian,Hongtao Qi,Weichang Li,Qianqian Yu
Chronic diabetic wounds present a formidable clinical challenge due to persistent hyperglycemia, impaired angiogenesis, and recurrent bacterial infection, often resulting in delayed healing. Here, we report a multi-responsive electrospun fibrous platform (ACE/ZAZ/Arg) that integrates pH- and NIR-responsive ZnO₂@Au@ZIF-67 nanozymes (ZAZ NPs) within the fiber shell and L-arginine (L-Arg) in the core. The coaxial electrospinning design enables hierarchical structural evolution and allows for sustained, sequential release of therapeutic agents. Mechanistically, ZAZ NPs catalyze glucose oxidation and trigger Fenton-like reactions to generate hydroxyl radicals (·OH), while L-Arg produces nitric oxide (NO) in the presence of hydrogen peroxide (H₂O₂). These reactive species act synergistically to enhance antibacterial efficacy and support wound repair, with NIR irradiation further amplifying the therapeutic outcome through photothermal conversion. In vitro studies confirmed excellent cytocompatibility, hemocompatibility, and enhanced endothelial tube formation, indicating strong pro-angiogenic potential. In an infected diabetic rat model, the ACE/ZAZ/Arg platform achieved rapid photothermal heating, significantly reduced bacterial burden, and accelerated wound closure to 98.0% within 14 days. Histological analysis demonstrated complete re-epithelialization, increased collagen deposition, and well-organized dermal tissue without detectable systemic toxicity. Together, this study presents a multifunctional fibrous platform that combines cascade antibacterial mechanisms, NO-mediated pro-healing activity, and structural guidance, offering a promising strategy for the treatment of chronic diabetic wounds.
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产品关联
DOI
高影响因子
ACS Nano
·
2026
·
IF 16
Han Chen,Yanxia Gao,Jiaxin Du,Runlong Hao,Xuanhao Wu,Lidong Wang,Zhongbiao Wu
The electrochemical nitric oxide reduction reaction (NORR) provides a promising pathway for mitigating air pollutant NO while generating valuable ammonia (NH3). However, most research has focused on high NO concentrations (≥10%), which contrast with industrial dilute streams (≤1%), where conventional catalysts, such as single-atom catalysts (SACs), struggle with insufficient active site density and limited *H supply, while nanoparticle catalysts suffer from hydrogen evolution reaction (HER) competition. To address these challenges, we designed a hybrid catalyst consisting of atomically dispersed Co–N4 satellitic sites and Co(111) nanoparticles (Co SA-NPs). Through electronic interaction, Co(111) facilitated enhanced water dissociation to generate *H, while Co–N4 sites strengthened NO adsorption and activation. This cooperative mechanism promoted rapid *H spillover, enabling selective NO hydrogenation to NH3 while suppressing HER. Under 1% NO, Co SA-NPs achieved a significant NH3 yield rate of 11389 μg cm–2 h–1, which is 2.6 to 243.9 times higher than all previously reported NORR catalysts. At industrially relevant and ultralow concentrations (0.05, 0.1, and 0.5%), it maintains a notable average Faradaic efficiency of 93.6% and NH3 yield rates (556, 948, and 3120 μg cm–2 h–1 respectively) among the highest reported under such challenging conditions. Furthermore, the catalyst demonstrated durability with >85 h of stable operation, and a cumulative NH3 production reaching the gram-scale, showcasing its practical potential. Techno-economic analysis (TEA) revealed that NORR with Co SA-NPs could achieve zero-cost NO treatment and even generate profit, compared to traditional NH3–SCR.
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产品关联
DOI
PubMed
高影响因子
Energies
·
2018
·Vol. 11
·期 5
·
IF 2.676
Zhitao Han,Dongsheng Zhao,Dekang Zheng,Xinxiang Pan,Bojun Liu,Zhiwei Han,Yu Gao,Junming Wang,Zhijun Yan
In order to enhance the mass transfer efficiency between gas–liquid interfaces, NaClO2mist generated by an ultrasonic humidifier was used to remove NO from simulated flue gas. The effects of some key parameters (the gas flow rate, the NaClO2concentration in the solution, the inlet NO concentration, the NaClO2solution pH) on NO removal efficiency were investigated preliminarily. The results showed that NaClO2mist could oxidize NO with a much higher efficiency compared with other mists containing either NaClO or H2O2as oxidants. With an increase in the gas flow rate from 1.5 to 3.0 L·min−1, the atomizing rate of the NaClO2solution increased almost linearly from 0.38 to 0.85 mL·min−1. When the gas flow rate was 2.0 L·min−1, a complete removal of NO had been reached. NO removal efficiency increased obviously with an increase in the NaClO2concentration in the solution. With an increase in the inlet NO concentration, the ratio of NO in the flue gas and NaClO2in the mist increased almost linearly. Furthermore, the NaClO2mist exhibited a relatively stable and high NOxremoval efficiency in a wide pH range (4–11) of NaClO2solutions. The reason for the high NO removal efficiency was mainly ascribed to both the strong oxidative ability of NaClO2and the improved mass transfer at the gas-liquid interface.
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DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Guanyu Liu,Huiyun Xia,Wenshuo Zhang,Lifang Song,Qiwei Chen,Yanhui Niu
Photocatalytic coating has been widely studied as a promising material to remove air pollutants. However, the effectiveness and long-term effect of photocatalysis in high relative humidity environment is still the main challenge in this field. In this study, a fluorinated WO 3 -TiO 2 nanorods/SiO 2 epoxy photocatalytic superamphiphobic coating (FTSE coating) was prepared using a simple spraying method. The micromorphology and chemical composition of FTSE coating was characterized by SEM , EDS, FT-IR, XPS and TGA techniques. The advanced contact angle and hysteresis angle test show that the FTSE coating had excellent superamphiphobicity. The mechanical abrasions , corrosion resistance and UV aging tests show that the FTSE coating exhibited reasonable durability. Besides, the NO degradation efficiency of hydrophilic and superamphiphobic coatings with contact angles of 20.19°, 87.74°, 162.93° and 164.47° was tested in different humidity environment. The results showed that the superamphiphobic coating exhibited more superior photocatalytic degradation efficiency (84.02%) than the hydrophilic coating (51.38%) at a high relative humidity (RH=98%). Finally, FTSE coating exhibited prominent photocatalytic stability and the synergistic effect of photocatalysis and self-cleaning. After 30 d outdoor weathering test, the NO degradation efficiency decreased by 13.07% and recovered to the original level after flushing. The improvement mechanism of NO degradation performance was proposed based on the characteristics of superamphiphobic surface.
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DOI
高影响因子
危险品化学品经营许可证（带存储）