TALANTA
·
2021
·
IF 6.057
Pengcheng Ma,Xiaoyan Ma
In this work, based on the dual catalytic properties of copper (Cu) particles for methanol oxidation and persulfate initiated radical polymerization , a temperature-controlled catalytic electrode, defined the PNIPAM-Cu@CP, was constructed by electrodepositing Cu particles on a carbon paper electrode and triggering the polymerization of the temperature-sensitive polymer N-isopropylacrylamide (PNIPAM) on the surface of the electrode, which is expected to be applicated in the micro-direct methanol fuel cell (DMAC) for detection of methanol crossover and also has temperature recognition and high-temperature self-protection functions. Cu particles and PNIPAM were characterized by X-ray diffraction (XRD), fourier-transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM) for their specific structure and morphology. The cyclic voltammetry (CV) results showed the proposed electrode as a temperature-controlled switch-like methanol sensor, has a wide linear range (1–300 mM and 300–1200 mM), excellent sensitivity (72.8 μA cm −2 mM −1 and 11.5 μA cm −2 mM −1 ) and a low detection limit of 0.3 mM for methanol. In addition, the sensor also has excellent selectivity and temperature-triggered switchable electrocatalytic activity . The efficient and simple preparation method of the electrode is expected to be used in the development of a methanol sensor for real-time methanol detection in micro-DMAC.
研究领域:
材料科学
·
电化学
·
传感技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2024
·
IF 13
Wentao Qu,Jian Zhu,Guozhong Cao,Shulin Chen,Yongwen Tan,Baohui Chen,Ming Zhang
Zinc-iodine batteries (Zn-I2) are extremely attractive as the safe and cost-effective scalable energy storage system in the stationary applications. However, the inefficient redox kinetics and “shuttling effect” of iodine species result in unsatisfactory energy efficiency and short cycle life, hindering their commercialization. In this work, Ni single atoms highly dispersed on carbon fibers is designed and synthesized as iodine anchoring sites and dual catalysts for Zn-I2 batteries, and successfully inhibit the iodine species shuttling and boost dual reaction kinetics. Theoretical calculations indicate that the reinforced d-p orbital hybridization and charge interaction between Ni single-atoms and iodine species effectively enhance the confinement of iodine species. Ni single-atoms also accelerate the iodine conversion reactions with tailored bonding structure of I─I bonds and reduced energy barrier for the dual conversion of iodine species. Consequently, the high-rate performance (180 mAh g −1 at 3 A g −1 ), cycling stability (capacity retention of 74% after 5900 cycles) and high energy efficiency (90% at 3 A g −1 ) are achieved. The work provides an effective strategy for the development of iodine hosts with high catalytic activity for Zn-I2 batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiaolei Hu,Weiye Qu,Junxiao Chen,Dongrun Xu,Jing Liu,Yangyang Dong,Rui Liu,Zhen Ma,Xingfu Tang
Selective catalytic reduction (SCR) of NO x with NH 3 over V 2 O 5 -based catalysts has been widely used to control NO x emissions from power plants, but its application is largely limited in other industrial boilers because of insufficient catalytic efficiency at low temperatures. Here we resolve this problem by mechanistically designing a highly active Ce-W/TiO 2 catalyst with reactants-coupling dual catalytic sites. The results demonstrate that W and Ce are highly dispersed on the surfaces of Ce-W/TiO 2 to form dual catalytic sites, which act as acid-base pairs favorable for NH 3 and NO adsorption, respectively, thereby allowing the reaction of adsorbed NH 3 on the W site with oxidized NO species (NO 3 − ) adsorbed on the adjacent Ce site to proceed along a low-activation-energy pathway via Langmuir-Hinshelwood mechanism. Compared with Ce/TiO 2 , a W-Ce synergy gives rise to more abundant Ce 3+ on Ce-W/TiO 2 , which facilitates the activation of O 2 during SCR process, thus improving the low-temperature SCR performance. Therefore, the design of the dual catalytic sites based on the properties of reactants provides an alternative approach to developing highly active SCR catalysts.
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
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Yan Zhou,Zefeng Wang,Shengnan Zhang,Le Deng
Integrating the advantages of catalytic hairpin components and multi-foot DNA walker, we designed a 16S rRNA detection probe template for pathogen bacteria, which utilizes DNA ligation quencher and dual catalytic [email protected] walker to induce signal recovery. The dual catalytic [email protected] walker uses the walking position of the target on the AuNP as a foothold to promote the reaction, so that the biosensing of the low-abundance target sequence can induce signal recovery. During the entire experiment, no enzyme is required, which can avoid the limitation of enzyme degradation under unfavorable conditions and the inability to detect the target. Most importantly, the detection template has the advantages of high sensitivity, and its detection limit is significantly better than that of single hairpin DNA walker probe. As the detection system can sensitively and rapidly detect its targeted bacteria and not rely on any enzyme and sophisticated instrumentation, it has great potential for sensitive and specific pathogenic bacteria detection.
研究领域:
分子生物学
·
生物传感
·
病原体检测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Shuo Feng,Bing Xiao,Meng Wu,Yun Wang,Rufen Chen,Hui Liu
In this study, copper phosphide (Cu 3 P) was used as a heterogeneous catalyst for peroxydisulfate (PDS) activation and Orange II degradation. This catalyst functions over a broad pH range, from 3.0 to 9.0 and the degradation rate of Orange II is 95.2% at 15 min under optimal conditions. The rapid degradation kinetics can be described by the Behnajady-Modirshahla-Ghanbery (BMG) equation. Sulfate radical, the main reactive oxidizing species, along with OH and O 2 − , were responsible for pollutant degradation. The Cu 3 P catalyst exhibited good stability and excellent anti-interference performance toward Cl − , NO 3 − , and HCO 3 − anions. The removal efficiency of Orange II remained close to 100%, even after five rounds of recycling reactions. The rapid catalytic mechanism of Cu 3 P is attributed to the dual-catalysis center in Cu 3 P (Cu and P) and simultaneous existence of three cycles ( Cu II → Cu III → Cu II , Cu I → Cu II → Cu I , and Cu δ+ → Cu 1+δ+ → Cu δ+ ) on the surface and interior of Cu 3 P. This study sheds new light on the fabrication of high-performance heterogeneous catalysts to solve the environmental problems.
研究领域:
环境科学
·
催化化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Binshu Sun,Jianhong Zheng,Dewu Yin,Huile Jin,Xin Wang,Quanlong Xu,Aili Liu,Shun Wang
Cocatalyst can greatly facilitate the charge separation efficiency and decrease the activation barrier of a specific reaction, thus contributing the improved photocatalytic performance. Herein, PdS/CdS/MoS 2 was synthesized via a facile microwave-assisted approach. Owing to the coexistence of PdS and MoS 2 , respectively serving as oxidation and reduction cocatalyst, PdS/CdS/MoS 2 displayed enhanced photocatalytic performance in both hydrogen production (6610 μmol·g −1 ·h −1 ) and benzylamine oxidation (87% conversion) in comparison with the individual and binary composite counterparts. The improved photocatalytic activity was mainly attributed to the high charge separation efficiency and lowed activation barrier. Furthermore, the introduction of PdS can timely extract photogenerated holes from CdS, which effectively inhibits the photo-corrosion of CdS, endowing it with high stability. This work paves the way for developing efficient chalcogenide photocatalysts.
研究领域:
材料科学
·
光催化技术
✓ 已验证
产品关联
DOI
高影响因子
ENERGY
·
2024
·
IF 9
Liang Zhu,Wei Cai,Jie Li,Dengyu Chen,Zhongqing Ma
Co-catalytic fast pyrolysis of torrefaction deoxygenated pine wood (PW) and high-density polyethylene (HDPE) in dual-catalyst (metal oxidize and zeolite) system is an effective technology to produce renewable bio-aromatics. In this work, the torrefaction deoxygenation pretreatment (TDP) was carried out to remove oxygen element from PW prior to catalytic fast pyrolysis (CFP). 56.90 % oxygen could be removed at TDP temperature of 300 °C, releasing in the oxygen carrier of CO 2 , CO, H 2 O, alcohols, acids, phenols , etc. Then, the synergistic effect between the metal oxide and the HZSM-5 in dual-catalyst system was also investigated. Among these metal oxides (Al 2 O 3 , MgO, CaO, ZnO, and Fe 2 O 3 ) and hierarchical HZSM-5, the dual-catalyst of CaO and hierarchical HZSM-5 (treated by 0.2 M NaOH) was the optimal combination. The layout mode between feedstock and dual catalyst was also optimized. The highest yield of aromatics was produced in layout Mode 8, where the CaO was mixed with torrefied PW, but the hierarchical HZSM-5 and HDPE were laid in separated layers. The mixing of CaO and torrefied PW promoted the conversion of the macromolecular oxygenates into micromolecular oxygenates. Then, these small-molecular oxygenates could enter the hierarchical channel of HZSM-5, being converted into aromatics by undergoing the Diels-Alder reaction.
研究领域:
能源科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Jie Liu,Hao Deng,Qing-Chun Yin,Min-Fu Wu,Lin Luo,Hong Wang,Zhen-Lin Xu,Bao-Zhu Jia
Organophosphorus pesticide residues pose significant threats to food safety and environmental health, and their monitoring methods demand sensitivity and anti-interference capability. In this study, we developed a novel ratiometric fluorescent immunosensor for fenitrothion (FN) detection by employing chitosan-modified platinum nanoparticles (Ch-Pt NPs) as catalytic nanozymes. Ch-Pt NPs exhibit oxidase-mimicking activity, enabling the oxidation of ascorbic acid (AA) and o -phenylenediamine (OPD) to produce dehydroascorbic acid (DHAA) and 2,3-diaminophenazine (DAP, Em = 568 nm), respectively. Then, DHAA further reacted with the remaining OPD to generate quinoxaline derivatives (DFQ, Em = 430 nm). These two products further form ratiometric fluorescent signals. Taking AA as a breakthrough point, the dual-catalytic cascade of natural enzymes and nanozymes was achieved by the combination with the alkaline phosphatase (ALP) -based enzyme-linked immunosorbent assay (ALP-ELISA). Compared with the conventional colorimetric ELISA, the proposed sensor demonstrated a nearly 20-fold enhancement in sensitivity (detection limit: 0.48 ng/mL) and achieved satisfactory recoveries of 80.0–108.3 % in spiked samples. The ratiometric fluorescent immunosensor demonstrates outstanding performance and holds great potential for extensive applications in the field of pesticide monitoring.
研究领域:
食品安全
·
环境健康
·
生物传感
·
纳米酶技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials Today
·
2025
·
IF 22
Huan Liang,Hongtu Xu,Yang Yang,Kejun Yin,Zhijun Yang,Zefeng Chen,Enjian He,Yixuan Wang,Shuhan Zhang,Yen Wei,Qiulin Chen,Guoli Wang,Yan Ji
The introduction of dynamic covalent bonds (DCBs) endows liquid crystal elastomers (LCEs) with reprocessability while maintaining structural integrity, expanding their potential applications in advanced shape-morphing devices. Actuation stability of covalent adaptable LCEs is critical for prolonging service life; however, existing solutions may compromise reprocessability and reuse. Here, we propose a dual-catalyst strategy to achieve both long-term actuation stability and efficient programmability in covalent adaptable LCEs. A volatile catalyst and a thermal-latent catalyst are applied, each enabling transesterification but functioning independently in two sequential stages. In the first stage, stable actuation in the presence of the latent catalyst is realized, withstanding up to 10,000 cyclic actuation — significantly surpassing the maximum of 1,000 cyclic actuation reported in previous works. In the second stage, efficient reprocessability is achieved by activating the thermal-latent catalyst to release a strong base. Moreover, the spatial–temporal activation of the latent catalyst enables localized, gradient, and stepwise orientation. This strategy provides a novel solution to balancing the trade-off between actuation stability and reprocessability, which can also be extended to other covalent adaptable networks.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2016
·Vol. 40
·期 3
·1982-1987
·
IF 3.277
Chen Chen,Jun Lv,Wanyi Chen,Yang Xiang,Juan Zhang
A colorimetric method is developed for the determination of the activity of β-lactamase (β-Lac) and the screening of its inhibitors based on cysteine-induced gold nanoparticle (AuNP) aggregation. The widely used penicillin is served as a β-Lac substrate, and the strong reduction capability of its corresponding product, which can react with Cu(II) to form Cu(I) conjugates, is utilized in the method. The double catalyzed signal amplification is accomplished via the addition of both β-Lac and Cu(II) which can catalyze the oxidization of cysteine into cystine. The activity of β-Lac is determined at levels as low as 2.36 U mL−1. The inhibitory effects of clavulanic acid and sulbactam are tested and give 0.92 and 0.06 μM, respectively. The assay is simple, rapid, easy-operated, and selective, and the proposed method has a great potential not only for the detection of β-Lac activity but also for the screening of the inhibitors.
研究领域:
生物化学
·
医学诊断
·
药物开发
✓ 已验证
产品关联
DOI
高影响因子
ACS Catalysis
·
2022
·
IF 13.7
Anon Bunrit,Teera Butburee,Meijiang Liu,Zhipeng Huang,Keerati Meeporn,Chaiyasit Phawa,Jian Zhang,Sanchai Kuboon,Huifang Liu,Kajornsak Faungnawakij,Feng Wang
Herein, we developed photo–thermo-dual catalytic strategies for the production of γ-valerolactone (GVL) from levulinic acid (LA) and its ester using platinum-loaded TiO2 as a dual-functional catalyst. Both catalytic systems were evaluated under mild reaction conditions. In the photocatalysis system, a base plays crucial roles in the conversion of LA and EL to GVL. The control experiments reveal that plausible mechanistic pathways of both systems proceed via the hydrogenation of the ketone group of LA to the corresponding alcohol as a major intermediate followed by a subsequent cyclization step to GVL. This dual-functional catalyst provides alternative strategies for the conversion of LA and its ester into GVL, which could pave the way for biomass utilization in a more effective and practical manner.
研究领域:
催化
·
生物质转化
·
化学工程
·
可持续化学
✓ 已验证
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Qingqing Li,Yingying Sun,Wenjie Liu,Jianna Yu,Guoxing Jing,Wen Liu,Xiaoyun Zhang,Suiping Wang,Wenshan Li
Aflatoxin B1 (AFB1) is considered one of the most toxic and carcinogenic substances. Developing sensitive and accurate methods for detecting AFB1 in foodstuffs remains a major challenge. Herein, a label-free colorimetric aptasensor was constructed for the detection of AFB1 in peanuts, utilizing dual catalytic hairpin assembly (CHA) for signal amplification. Where, the recognition of AFB1 by its aptamer (Apta) induces the formation of an Apta-AFB1 complex, causing the trigger chain (T) to release from the Apta-T complex. The released T triggers the first CHA reaction in the presence of hairpins H1, H2, and H3, producing H1-H2-H3 complexes. Each sticky end of these complexes serves as the initiating strand for the second CHA cycle, exposing a G-rich sequence from H5 that induces the formation of a G-quadruplex/hemin DNAzyme. This DNAzyme catalyzes the H 2 O 2 -mediated oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB), resulting in a color change. Under optimal conditions, the colorimetric signal is linearly related to the logarithm of AFB1 concentration in the range of 50 pM to 1.1 nM, with a detection limit of 13.49 pM. The spiked recoveries for AFB1 in peanuts range from 95.28 % to 104.50 %. This aptasensor provides a sensitive and accurate method for detecting trace amounts of AFB1, which is crucial for ensuring food safety.
研究领域:
食品安全
·
生物传感
·
分子生物学
✓ 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）