Catalysis Science & Technology
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2024
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IF 4.4
Haixiang Shi,Yiyuan Xu,Tongming Su,Xuan Luo,Xinling Xie,Zuzeng Qin,Hongbing Ji
The surface acidity and structure of catalysts play crucial roles in cinnamaldehyde (CAL) selective hydrogenation to manufacture cinnamyl alcohol (COL). Herein, a Co–Fe-supported acidified bentonite catalyst (Co–Fe/ACBT) was prepared via sulfuric acid treatment of bentonite (BT) and the traditional impregnation method. The combination study, including FT-IR spectra of adsorbed pyridine and ammonia temperature-programmed desorption (NH3-TPD), showed that Co–Fe/ACBT has vast acidic sites mainly originating from surface unsaturated metal sites of ACBT, which prefer to adsorb polar >CO but not nonpolar >CC<. X-ray photoelectron spectroscopy (XPS) verified that the effect of electron transfer was significantly enhanced when the active metal was loaded on ACBT, leading to an increase in the electron cloud density of the Co species, which promoted the activation of >CO. Due to the modified electronic properties of Co species and abundant acidic sites, Co–Fe/ACBT exhibited a 90.5% conversion and 86.8% hydrogenation selectivity from CAL to COL, which are notably greater than those of the Co–Fe-supported bentonite catalyst (32.0% CAL conversion and 66.4% COL selectivity).
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ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Lulu Zhao,Huilin Hou,Shuo Wang,Lin Wang,Yang Yang,Chris R. Bowen,Jinguo Wang,Ziyi Liao,Dongjiang Yang,Ruifang Yan,Weiyou Yang
Despite the development of a range of photocatalysts for CO 2 reduction, the practical applications are significantly limited by low conversion efficiencies and their reliance on sacrificial agents, which are rooted in thermodynamic and kinetic challenges related to CO 2 conversion. Here, the engineering of Co single atoms in ultrathin single-crystal BiOCl nanosheets for boosted photocatalytic CO 2 reduction is reported. The engineering of Co atoms modulates the distribution of photogenerated charges at the catalyst surface, controlling key surface reaction dynamics and suppressing surface electron-hole recombination. This modulation also improves light absorption and enhances CO 2 adsorption and activation, leading to more efficient surface reactions. Notably, CO 2 is stably adsorbed onto the (001) face of BiOCl through a Bi-O-C(= O)-Co-O coordination unit, which lowers the activation energy for CO 2 reduction and reduces the formation energy of COOH − intermediates. As a result, the BiOCl photocatalysts achieve a CO formation rate of 183.9 µmol g −1 h −1 , when irradiated with a 300 W Xe lamp without cocatalysts or sacrificial agents. It represents an ≈13-fold increase compared to that of pristine BiOCl, and surpasses most reported Bi-based photocatalysts to date. Current work provides valuable insights into engineering of single atoms for developing advanced CO 2 -reduction photocatalysts.
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ANALYTICAL CHEMISTRY
·
2024
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IF 6.7
Jiancong Ni,Shengxiu Huang,Weiqiang Yang,Qiaoling Chen,Zhenyu Lin
Glycolysis, a pivotal step in yeast metabolism, plays an indispensable role as a carbohydrate utilization process crucial for cellular survival. Developing advanced technologies to elucidate this fundamental physiological process holds significant scientific implications. Electrochemiluminescence (ECL) imaging exhibits the advantage of negligible background interference and facilitates straightforward visualization, thereby conferring significant value in biomolecular observation. In this study, we present an ECL imaging method for investigating yeast metabolism by utilizing the endogenetic NADH as an efficient coreactant for ECL generation. The yeast glycolysis process drives the conversion of NAD+ to NADH, resulting in enhanced ECL response as well as the increased brightness of ECL images that can be used for quantification of yeast activity. There was a linear correlation between the reciprocal of both the gray value of ECL image and yeast concentration within the range of 6.25 × 106 – 6.25 × 108 CFU/mL. Due to the highly efficient coreactant behavior of NADH, our method demonstrated excellent selectivity with minimal interference. Furthermore, we employed this approach to investigate some toxic inhibitors on yeast metabolism, yielding reliable results. This ECL imaging method not only avoids the use of additional coreactants but also provides a sensitive and intuitive approach for monitoring yeast metabolism, demonstrating great potential in revealing various complex biological processes.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Haiyan Ji,Zhaowen Wu,Tong Li,Guidong Ju,Huaming Li,Yong Wang,Hui Xu,Junfeng Liu
The high energy requirements of water electrolysis, driven largely by the sluggish kinetics of the oxygen evolution reaction (OER), hinder its widespread application for hydrogen production. This study presents an innovative alternative by replacing OER with the thermodynamically favorable furfural oxidation reaction (FOR), utilizing a CuPt nanowire (NW)/Cu electrocatalyst. The incorporation of Pt into Cu NWs significantly enhances FOR activity, enabling the production of value-added furoic acid alongside hydrogen gas at reduced voltages. The CuPt NWs/Cu catalyst also exhibits excellent hydrogen evolution reaction (HER) performance in alkaline media. By employing CuPt NWs/Cu as both the anodic and cathodic catalyst, we develop a two-electrode electrolyzer that integrates FOR and HER, allowing simultaneous hydrogen production at both electrodes. Operating at a current density of 10 mA cm −2 , the system requires an exceptionally low cell voltage of 0.39 V and an electricity consumption of 0.47 kWh per m 3 H 2 , demonstrating its efficiency for energy-saving bipolar hydrogen generation.
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JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
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2024
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IF 4.5
MengYing Lei,Qing Chen,Yang Wang,Gang Wang
Oral absorption of carrier-free self-assembly nanoplatform was limited by mucus barrier, p-gp efflux and liver metabolism. In this study, Pip-Cur-TA nanoparticle were constructed by co-assembly of tannic acid, curcumin and piperine via inter-molecular hydrogen-bonded and π-π interaction to improve the oral chemotherapy. The optimized Pip-Cur-TA nanoparticle showed an average diameter of 60 nm with a drug encapsulation efficiency of 67.02 % and loading capacity of 61.37 %. Pip-Cur-TA nanoparticles showed pH-dependent drug release, mucosal adhesion, inhibition of p-gp and liver metabolism and improved membrane permeability. Oral Pip-Cur-TA nanoparticle produced high oral delivery efficiency and relative oral bioavailability of 12.84 % in rats, and further showed significant tumor inhibition on PC-3 tumor cells. These findings confirmed that Pip-Cur-TA nanoparticle might be a promising oral drug formulation for chemotherapy.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Fengliang Cao,Qingshan Zhao,Xiaojie Tan,Libo Wang,Yikun Zhao,Wei Deng,Linjie Zhi,Mingbo Wu
Optimizing the local environment of metal active centers bonded by nitrogen ligands (M−N 4 ) through additional axial coordination provides a promising approach to enhance the reaction kinetics of heterogeneous catalysis. However, achieving precise targeting and construction of efficient active sites remains a major challenge. In this study, under the guidance of density functional theory (DFT) calculations, we precisely position and engineer atomic Co–N 4 active sites with axial O coordination on porous carbon nanosheets (Co 1 /NOC) for boosted aromatic nitroreduction through a novel template-anchoring strategy. The resulting Co 1 /NOC catalyst exhibited unprecedented catalytic activities towards a series of functionalized nitroaromatics with a record overall turnover frequency (TOF) of 38022 h −1 under mild reaction conditions, 7.6- and 38 times higher than that of Co–N 4 sites (Co 1 /NC) and commercial Pd/C catalysts, respectively, standing ahead of the reported catalysts. Targeted DFT calculations reveal that axial oxygen coordination efficiently promotes the electronic delocalization of the Co center, which dramatically facilitates the formation and utilization of reactive H* species, enhances the selective adsorption of nitroaromatics, and accelerates the conversion of aromatic nitroreduction, eventually attaining exceptional catalytic performance. This work offers a new avenue for precisely tailoring the coordination environment of single-atom catalysts to achieve advanced catalytic performance in chemical transformations.
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BIOSENSORS & BIOELECTRONICS
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2024
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IF 10.7
Yanpei Xu,Haoyu Wu,Meng Sun,Hongyu Song,Chuxiao Sun,Fudong Jia,Qi Wang
In the detection of biomolecules, surface plasmon resonance (SPR) sensors require high sensitivity. In this study, we propose a sensitivity-enhanced functionalized plasmonic interface based on Ag–TiO 2 –Co(OH) 2 nanosheets structure. Compared to unmodified SPR sensors, the sensitivity of the sensor decorated with TiO 2 and Co(OH) 2 nanosheets is increased by 130.84%, reaching 5764.27 nm/RIU. This enhancement is attributed to the high refractive index of the coating, as well as the high specific surface area and abundant active sites provided by the synthesized Co(OH) 2 nanosheets with a multi-grooved structure. Additionally, employing a double-antibody sandwich method, the antibody-functionalized plasmonic interface enables specific detection of human serum albumin (HSA). The linear response of this sensor was in the wide range of 0.4–150 μM, and the LOD reached 154.89 nM(K D is approximately 1.73 × 10 −6 M). This novel SPR sensor offers a new strategy for biochemical sensing and provides a highly sensitive platform for immunoassays.
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Journal of Central South University
·
2017
·Vol. 24
·期 8
·1727-1735
·
IF 0.601
Gao Zheng-cai,Li Li-qing,Li Hai-long,Chen Ruo-fei,Wang S.,Wang Yang-gang
A zeolitic imidazolate hybrid membrane (Co-IM-mIM) containing two imidazolate ligands deposited on a macroporous α-alumina support was prepared by pre-depositing and secondary growth technique. XRD, TGA and SEM characterizations demonstrate that a stable and thin, but dense and pure-phase Co-IM-mIM membrane can be obtained on the macroporous-alumina discs in Teflon-lined autoclave at 120 °C after pre-depositing by dip-coating at room temperature. No visible cracks, pinholes or other defects were observed on the membrane layer. The gas separation studies of Co-IM-mIM membrane were carried out at 25 °C and 1×10 5 Pa, showing ideal selectivity of 6.95, 5.25, 3.40 for H 2 /CO 2 , H 2 /N 2 and H 2 /CH 4 , respectively, and a permeance of 17.37× 10 −6 mol/(m 2 ·s·Pa) for H 2 . The influence of temperature and trans-membrane pressure on hydrogen separation and permeation was also carried out. The gas permeation and selectivity demonstrate that this membrane may have potential applications for efficient H 2 separation.
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FlatChem
·
2024
·
IF 5.9
Siqi Gong,Jing Li,Fan Zhao,Mengdie Yan,Chenghao Huang,Guanzhong Huo,Chunli Li,Bing Wu,Jiapeng Liu
The emerging energy-saving and environmentally friendly capacitive deionization (CDI) technology has attracted more and more attention. However, it remains a great challenge to develop CDI electrode materials with excellent comprehensive properties. Herein, the porous N, P co-doping Ti 3 C 2 T x MXene (N, P-Ti 3 C 2 T x ) was prepared successfully by combining simple flocculation with an annealing process. Benefitting from the synergistic effect of the combination of porous structure and co-doping of N and P heteroatoms, the N, P-Ti 3 C 2 T x exhibits substantial specific surface area, which provides more surface bounding active sites for electrochemical reactions, thus assisting to boost the CDI performance. As a result, the N, P-Ti 3 C 2 T x exhibited an admirable salt (Na + ) adsorption capacity of 53.3 mg g −1 and exceptional recycling property. Impressively, the N, P-Ti 3 C 2 T x also exhibited superior desalination performance of Pb 2+ , characterized by an exceptionally high desalination capacity of up to 168.2 mg g −1 at 1.2 V, and the corresponding desalination rate reached 0.047 mg g −1 s −1 . Additionally, the deionization mechanism involved was elucidated through a series of characterizations. This work will furnish an effective avenue for the innovative design of MXene-based electrode materials toward high-performance CDI.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-12
·
IF 15.7
Chen Yonghuan,Li Xiuying,Yue Xinru,Yu Weihua,Shi Yuesen,He Zilong,Wang Yuanfeng,Huang Yu,Xia Fan,Li Fengyu
Synthetic drugs fundamentally reshape the illicit drug market due to their low cost, ease of production, and rapid manufacturing processes. However, current drug detection methods, which rely on complex instruments, have limited applicability and often neglect the influence of pH fluctuations, leading to potential bias and unreliable results. Herein, we propose co-calibration DNA probes on a nanoconfined biosensor (N C B S ), covering the range of sweat pH 3–8 to achieve significantly enhanced target signal recognition. The N C B S exhibits a linear response range of 10 3 -10 8 fM with a low limit of detection (LOD) of 3.58 fM in artificial sweat. Compared to the single-aptamer N C B S , the dual-aptamer N C B S offers a broader linear response range, primarily due to the synergistic effects of changes in surface wettability and the capture of hydrion, which together reduce signal interference in proton transport. The linear response range doubles, and its detection sensitivity improves by 4–5 orders of magnitude compared to existing drug detection methods. This sensing strategy expands the application scope of aptamer-based composite probes, offering an approach for ultra-sensitive drug detection and demonstrating significant potential in sweat sensing and drug monitoring fields.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Linyun Zhang,Shanxin Li,Xuzhou Jiang,Hongying Yu,Yijing Sun
Metal organic frameworks (MOFs) have been widely used as microwave absorption (MA) materials owing to their varied structures and large specific surface area. However, it is still challenging to endow MOF derivatives with a rational structure to achieve outstanding microwave absorption. In this work, the hollow Co@C nanorods (HCCN) with lots of winding carbon nanotubes on the surface are obtained based on a template-sacrificing method which employs ZnO nanorods as templates and ZIF67 nanoparticles as ornaments. The HCCNs possess large pore size and specific surface area, efficiently improving the impedance matching . The 1D structure, abundant heterointerfaces and defects trigger strong conduction loss, interfacial and dipole polarization, respectively. Therefore, HCCNs exhibits excellent MA properties: the strong reflection loss of −66.8 dB at the thickness of 2.1 mm and the effective absorption bandwidth of 5.68 GHz at 2.5 mm. Radar cross section (RCS) simulation results have confirmed the practicality of HCCNs. This study proposes an inspiration for the structural designing of MOF materials and derivatives to realize amazing MA performance.
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WATER SCIENCE AND TECHNOLOGY
·
2024
·Vol. 90
·期 4
·1132-1148
·
IF 2.5
Wang Rui,Dai Zhineng,Zhang Wenqi,Ma Chao
View large Download slide View large Download slide Close modal Efficient degradation of industrial organic wastewater has become a significant environmental concern. Electrochemical oxidation technology is promising due to its high catalytic degradation ability. In this study, Co–Bi/GAC particle electrodes were prepared and characterized for degradation of 1,4-dioxane. The electrochemical process parameters were optimized by response surface methodology (RSM), and the influence of water quality factors on the removal rate of 1,4-dioxane was investigated. The results showed that the main influencing factors were the Co/Bi mass ratio and calcination temperature. The carrier metals, Co and Bi, existed mainly on the GAC surface as Co 3 O 4 and Bi 2 O 3 . The removal of 1,4-dioxane was predominantly achieved through the synergistic reaction of electrode adsorption, anodic oxidation, and particle electrode oxidation, with ·OH playing a significant role as the main active free radical. Furthermore, the particle electrode was demonstrated in different acid–base conditions (pH = 3, 5, 7, 9, and 11). However, high concentrations of Cl − and NO 3 - hindered the degradation process, potentially participating in competitive reactions. Despite this, the particle electrode exhibited good stability after five cycles. The results provide a new perspective for constructing efficient and stable three-dimensional (3D) electrocatalytic particle electrodes to remove complex industrial wastewater. A Co–Bi/GAC particle electrode for the 3D/E system was prepared by the one-step method. The production of ·OH was increased significantly by adding a 3D particle electrode. Fast and effective removal was achieved in the high range of initial 1,4-dioxane concentration. The Co–Bi/GAC particle electrode has a high catalytic activity. The 1,4-dioxane was removed via electrode adsorption and oxidation synergy.
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