MICROCHEMICAL JOURNAL
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2018
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IF 2.746
Jiashuai Yan,Ye Li,Haorui Li,Yuzhi Zhou,Huafeng Xiao,Bolin Li,Xiao Ma
In this study, Zeolite X was prepared by hydrothermal method , and the amidoxime group was loaded on the zeolite X to prepare amidoxime-modified zeolite X. The effective removal of ruthenium by amidoxime-modified zeolite X in simulated wastewater was investigated. The raw and modified zeolite X were characterized systematically using the BET method, the SEM, the FTIR, the XRD and the XPS to understand the physicochemical changes of the materials, and its sensitivity to Ru 3+ adsorption. Batch adsorption experiments were carried out to investigate the effects of adsorbent dose, contact time, solution pH, different initial Ru 3+ concentrations, temperature and the effect of competitive ions on Ru 3+ adsorption. The modified zeolite X exhibited fast removal performance reaching equilibrium within 30 min at the pH of 3, and the maximum adsorption capacity was found to be 175.4 mg/g. The XRD patterns demonstrated that the modified adsorbent still has the characteristic peak of zeolite NaX, and from the SEM, it can be seen that the modified adsorbent shown the same regular octahedral crystal structure as the zeolite X. In addition, the characterization result of FTIR and XPS indicated the amidoxime group was successfully loaded onto zeolite X. Kinetic parameters were fitted by the pseudo-second order model (R 2 = 0.9999), and the adsorption process by the modified zeolite X was chemical adsorption. The adsorption isotherms data of modified zeolite X were well-fitted to the Langmuir (R 2 = 0.9834).In the competitive ions effect, the modified zeolite X effectively captured the Ru 3+ ion in the presence of Na + and K + . Therefore, the amidoxime-modified zeolite X could be effectively used as a potential adsorbent for Ru 3+ adsorption from wastewater.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Journal of Materials Chemistry A
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2022
·Vol. 10
·期 15
·8227-8237
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IF 14.511
Siran Zhang,Wei Zhou,Jianing Mao,Kang An,Ningyan Li,Tian Qin,Liwei Chen,Xi Liu,Bingbao Mei,Zheng Jiang,Zhong-Li Wang,Yusuke Yamauchi,Yuan Liu
Supported noble metal catalysts are widely applied in energy and environmental catalytic reactions; however, noble metal particles are prone to sintering under reaction conditions. Herein, we demonstrate that the introduction of Ru ions in the LaNiO3 perovskite support produces strong interface bonding between the Pt nanoparticle catalyst and LaNiO3 support, resulting in super anti-sintering performance of the Pt nanoparticle catalyst. A novel method is developed to synthesize the supported noble metal catalysts by doping Pt and Ru ions into the lattice of LaNiO3 and then reduction in a hydrogen atmosphere. The different formation energies of both metal ions in the LaNiO3 lattice induce selective reduction of Pt ions to generate Pt nanoparticles, while Ru ions remained in the LaNiO3 support. Using CO oxidation as a probe reaction, we find that supported Pt nanoparticles on Ru doped LaNiO3 hardly change after undergoing a high temperature of 600 °C for 250 h, and the average particle size only increases from 2.1 to 2.4 nm; moreover, the high catalytic activity is maintained. In contrast, without Ru ions, the Pt particles grow from 2.9 to 10.9 nm, and the activity decreases significantly. Experimental and theoretical evidence indicates that Ru ions not only form stable Pt–O–Ru ionic bonds but also enhance the Pt–O bonding on LaNiO3.
研究领域:
催化化学
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材料科学
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理论计算
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2019
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IF 8.456
Wenfang Deng,Yi Peng,Hui Yang,Yueming Tan,Ming Ma,Qingji Xie,Shaowei Chen
Detection of hydrogen peroxide is of great significance for clinical diagnosis and biomedical research. Ratiometric detection represents an effective method that is generally based on horseradish peroxidase. In the present study, ruthenium ion-complexed carbon nitride (Ru–C3N4) nanosheets are found to serve as a peroxidase mimic and can catalyze the conversion of o-phenylenediamine to fluorescent 2,3-diaminophenazine in the presence of H2O2. The produced 2,3-diaminophenazine also results in the apparent quenching of the Ru–C3N4 photoluminescence due to the inner filter effect. These unique characteristics can be exploited for the construction of an effective, peroxidase-free ratiometric fluorescence framework for the detection of H2O2 and glucose, which has also been used in the successful detection of glucose in human serum. Results from this study not only demonstrate a new peroxidase mimic but also provide a novel ratiometric fluorescence platform for the detection of H2O2 and metabolites involving reactions of H2O2 generation in the absence of horseradish peroxidase.
研究领域:
生物医学工程
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临床诊断
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材料科学
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产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2023
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IF 8.4
Qingteng Lai,Yanke Zhang,Wei Chen,Zhengchun Liu
In this study, an ultrasensitive electrochemical-detection system based on a target “turn-on” signal-enhancement pseudocapacitor was established for microRNA-141 (miRNA-141) detection. A three-dimensional porous film was constructed on the electrode surface in situ by chitosan, catechol and nanomaterials (gold nanoparticles and nitrogen-doped carbon nanotubes). When miRNA-141 hybridized with the probe on the electrode, ferrocene (Fc) was specifically introduced into the electrode surface, and then a pseudocapacitor containing Fc, ruthenium ion (Ru 3+ ), catechol, and electrode formed (“turn on”). Fc and Ru 3+ consumed in the electrode reaction can quickly recover to the original valence state on the surface of catechol/quinone and again participated in the electrode reaction. A "one to many" relationship existed between the target and the signal molecule Fc, which contributed to the improvement of the sensor sensitivity. The signal strength and stability of Fc improved and thus improved the sensitivity and stability of miRNA-141 detection. The concentration information of miRNA-141 was collected from the change in Fc signal strength. The linear detection range was 0.5 fM to 800 pM, and the detection limit can be calculated as 43.73 aM. This system overcame the problems of low reliability and weak signal of the traditional electroactive-ion labeling method, which relied on the change in electrostatic attraction/repulsion before and after probe–target hybridization.
研究领域:
生物化学
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纳米技术
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电化学
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生物传感器
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癌症诊断
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产品关联
DOI
高影响因子
ADVANCED MATERIALS
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2024
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IF 27.4
Shuyu Wang,Miaomiao Cheng,Shenghui Wang,Wei Jiang,Feifei Yang,Xiaomei Shen,Lirong Zhang,Xiyun Yan,Bing Jiang,Kelong Fan
Radiotherapy (RT), essential for treating various cancers, faces challenges from tumor hypoxia, which induces radioresistance. A tumor-targeted “prosthetic-Arginine” coassembled nanozyme system, engineered to catalytically generate nitric oxide (NO) and oxygen (O 2 ) in the tumor microenvironment (TME), overcoming hypoxia and enhancing radiosensitivity is presented. This system integrates the prosthetic heme of nitric oxide synthase (NOS) and catalase (CAT) with NO-donating Fmoc-protected Arginine and Ru 3+ ions, creating HRRu nanozymes that merge NOS and CAT functionalities. Surface modification with human heavy chain ferritin (HFn) improves the targeting ability of nanozymes (HRRu-HFn) to tumor tissues. In the TME, strategic arginine incorporation within the nanozyme allows autonomous O 2 and NO release, triggered by endogenous hydrogen peroxide, elevating NO and O 2 levels to normalize vasculature and improve blood perfusion, thus mitigating hypoxia. Employing the intrinsic O 2 -transporting ability of heme, HRRu-HFn nanozymes also deliver O 2 directly to the tumor site. Utilizing esophageal squamous cell carcinoma as a tumor model, the studies reveal that the synergistic functions of NO and O 2 production, alongside targeted delivery, enable the HRRu-HFn nanozymes to combat tumor hypoxia and potentiate radiotherapy. This HRRu-HFn nanozyme based approach holds the potential to reduce the radiation dose required and minimize side effects associated with conventional radiotherapy.
研究领域:
肿瘤学
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纳米技术
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生物化学
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治疗学
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放射肿瘤学
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DOI
PubMed
高影响因子
Journal of Materials Chemistry A
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2024
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IF 10.7
Yujie Wei,Jianying Wang,Yahang Shang,Chang Lv,Xiaoyang He,Tao Wang,Zuofeng Chen,Lvlv Ji,Sheng Wang
Transition metal dichalcogenides are recognized as promising electrocatalysts for hydrogen evolution reaction (HER), but their catalytic performances still require further enhancement. Herein, Ru-doped cubic CoSe2 with leaf-like microarray hollow structure supported on carbon cloth (Ru-c-CoSe2@CC) is rationally fabricated via a strategy involving in situ growth of Co-ZIF, Ru3+ ions etching and selenization steps. The chemical etching step transforms the precursor sample from Co-ZIF to RuCo-LDH and the subsequent selenization step observes crystal phase transformation and Ru-doping of CoSe2 to form Ru-c-CoSe2. Compared with orthorhombic CoSe2 and pristine c-CoSe2, the optimized electrocatalyst Ru-c-CoSe2/CC-3 shows significantly enhanced HER catalytic performance in both acidic and alkaline media. Theoretical investigations demonstrate the charge-transfer redistribution triggered by Ru dopants, optimizing the electronic states of the adjacent Co atoms with boosted intrinsic catalytic activity. Additionally, the leaf-like microarray hollow structure is highly desirable in active site expose and mass transfer due to its superaerophobic interfacial property.
研究领域:
材料科学
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电化学
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催化
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）