INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2022
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IF 7.139
Weilin Zhong,Chao Wang,Bo Jiang,Suqing Peng,Hailun Zhao,Riyang Shu,Zhipeng Tian,Yanping Du,Ying Chen
Combining solar energy utilization and hydrogen production is an ideal model for renewable energy development. Especially the conversion of broad-spectrum solar energy into chemical energy of hydrogen and thermal energy can enrich solar energy storage methods. Herein, novel multifunctional Au/TiO 2 @n-octadecane microcapsules with core-shell structure were design and synthesized by wet chemical reduction and electrostatic adsorption self-assembly methods for photothermal hydrogen production and thermal storage . The results showed that microencapsulation of photothermal catalysts could provide an effective reaction area and excellent dispersion stability , where hydrogen production and light to hydrogen efficiency were increased in the 43% and 0.3% respectively, compared to the nanoparticle suspension system. Based on the recorded temperature variations caused by the photothermal effect, the calculated photothermal conversion efficiency and specific absorption rate of Au/TiO 2 @n-octadecane was 25.01% and 277% higher than that of Au/TiO 2 suspension. The proposed hydrogen production and thermal storage method via multifunctional microcapsules might shed some light on the study of improving full-spectrum energy conversion efficiency of solar energy.
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Journal of Environmental Chemical Engineering
·
2025
·Vol. 14
·期 1
·120944
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IF 7.2
Yong Xiang,Li Xu,Guoji Liu
Efficient recovery of Au(III) from electronic and industrial waste streams is of both economic and environmental importance. Herein, a pore-regulation strategy was developed to construct hierarchically porous NH 2 -MIL-101(Fe 1-x Cu x ). By employing 2-aminoterephthalic acid to coordinate simultaneously with Fe 3 + and Cu 2+ , the unstable Cu–O bonds were selectively removed through a mild acid-soaking treatment, thereby generating enlarged channels and hierarchical micro–mesoporous structures. The optimized framework achieved an Au(III) adsorption capacity of 944 mg g −1 , which was ∼30.7 % higher than that of unmodified NH 2 -MIL-101. Mechanistic studies demonstrated that the hierarchical pore architecture not only facilitated mass transfer but also enhanced accessibility of active sites, synergistically contributing to the superior adsorption performance. This work highlights that rational pore-channel engineering around adsorption sites can substantially boost the recovery efficiency of reducible precious metals, offering a novel design paradigm for advanced MOF-based adsorbents.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Muhammad Asim,Bushra Maryam,Shuguang Zhang,Muhammad Sajid,Alibek Kurbanov,Lun Pan,Ji-Jun Zou
The hydrogen evolution from ammonia borane is intriguing but challenging due to its sluggish kinetics. In this regard, the gold nanoparticles amalgamation with metal phosphides is speculated to be more efficient catalysts. Here, the catalysts Au/Ni 2 P and Au/CoP with the high synergetic effect of Au nanoparticles and metal phosphides were synthesized for ammonia borane hydrolysis. The activity of Au/Ni 2 P increases 4.8-fold (i.e., 0.08 to 0.40 L∙h −1 ) compared to pristine Ni 2 P, and the activity of Au/CoP increases 1.7-fold (i.e., 0.74 to 1.27 L∙h −1 ) compared to pristine CoP. This reveals that the synergetic effect of Au δ+ and (Ni 2 P) δ- is stronger than Au δ+ and (CoP) δ- which is manifested by XPS analysis. The kinetics exposes that the activation energy of Au/Ni 2 P (45.28 kJ∙mole -1 ) is greater than Au/CoP (31.45 kJ∙mole -1 ) and the TOF of Au/Ni 2 P is less than Au/CoP. This research work presents an effective approach for producing active sites of Au δ+ and (Ni 2 P & CoP) δ- for ammonia borane hydrolysis to enhance the H 2 evolution rate.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Suqing Peng,Weilin Zhong,Hailun Zhao,Chao Wang,Zhipeng Tian,Riyang Shu,Ying Chen
Photocatalytic hydrogen production and thermal storage are effective ways to convert solar energy into storable chemical energy and thermal energy , but they only respond to specific spectrum. In order to improve the energy conversion and storage efficiency of solar energy in the solar spectrum, hydrothermal and photo-deposition method were employed to synthesized photothermal catalyst while and Au/TiO 2 @PCM composite microcapsules were fabricated by electrostatic adsorption self-assembly methods. Micro-morphologies and structures were detailed characterized by SEM , XRD , UV-Vis, etc. As calculated from the DSC results for effective, enthalpy value , the loading rates of Au/TiO 2 shell for the microcapsule were 12.6% and 15.4% corresponding to rod-shaped and sheet-shaped samples. To test their catalytic performance, the samples were dispersed in the same concentration of glycerol solution, and showed that the light to hydrogen efficiencies were 11.4‰ and 5.0‰ for ATR@PCM and ATF@PCM, respectively with the increasement of 53.8% and 56.1% comparing to their corresponding catalyst nanoparticle suspensions. Photo-thermal conversion efficiencies of ATR@PCM and ATF@PCM were 62.74% and 53.32% after 60 min-irradiations, and they were 48.22% and 25.96% higher than that of Me-PCM. Therefore, it was confirmed that the composite phase change microcapsules prepared in this study have the dual functions of energy storage and photothermal catalysis. Higher solar light to hydrogen energy conversion efficiency may be attained in future study if the stored thermal energy can be successfully employed to activate organic components for helping catalytic hydrogen generation .
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CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Yuxia Zhong,Zhihua Zhang,Min Zhang,Yujie Liao,Shudong Shi,Wenyao Chen,Liang Wang,Xinggui Zhou,Xuezhi Duan
The selective oxidation of alkanes is challenging due to the inertness of C–H bonds and the tendency for overoxidation to COx. Metal-zeolite catalysts offer a promising solution by spatially decoupling oxygen and C–H bond activation on distinct active sites. This study introduces a strategy using surface hydrophobic modification of titanium silicalite-1 (TS-1) zeolites to achieve high selectivity in propane oxidation to acetone. Hydrophobic organosilanes with methyl groups were applied via a one-step co-condensation process, followed by Au nanoparticle immobilization. The hydrophobic groups prolong the residence time of the intermediate isopropanol on the catalyst surface, enhancing its conversion to acetone while stabilizing H 2 O 2 to prevent excessive oxidation of carbon-containing species into CO 2 during the process. The modified TS-1 demonstrated excellent thermal stability and selectivity, particularly under extreme hydrogen-to-oxygen ratios conditions. The alkylated Au/TS-1 catalysts significantly improved acetone production, providing a new pathway for selective alkane oxidation.
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SEPARATION SCIENCE AND TECHNOLOGY
·
2018
·
IF 1.2
Zeyang Xiang,Shubin Wang,Yanzhao Yang,Xia Xin
The effect of spacer lengths of imidazolium gemini surfactant [C14-n-C14im]Br2 (n = 2, 4, 6) on the equilibrium, thermodynamics and kinetics of Au(III) extraction from hydrochloric acid medium were investigated in this article. The thermodynamic parameters, including the changes in enthalpy (ΔH*), entropy (ΔS*) and Gibbs free energy (ΔG*) were determined. The values of ΔH* demonstrated that the extraction of Au(III) by [C14-n-C14im]Br2 was endothermic at first and exothermic at last. The kinetics study found that extraction rate became faster when the spacer lengths were increased. Moreover, kinetics results demonstrated that the diffusion is the controlling step, and the mass transfer coefficients of Au(III) in the investigated systems indicated that the resistance of mass transfer was smaller when the spacer lengths was longer. The studies of interfacial tension further confirmed the better extractability of [C14-n-C14im]Br2 with longer spacer lengths. Our results reveal efficient and sustainable gold separation.
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MICROCHEMICAL JOURNAL
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2021
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IF 4.821
Hao Zhou,Qing Lu
In this work, a facial electrochemical method was developed for the sensitive triclosan (TCS) detection. The Au nanoparticles-electrochemically reduced graphene oxide (Au-ErGO) composite was deposited on glassy carbon electrode (GCE) by electrochemical way. Dodecanethiol (DDT) monolayers further self-assembled on Au-ErGO by forming Au-S bond. SEM, AFM, EDS, Raman, contact angle test and electrochemical way were applied to characterize the composites. The wrinkled Au-ErGO film would provide more active sites for TCS oxidation. More importantly, DDT monolayers could reduce the non-faradic current derived from the electrolyte. Therefore, the electrochemical response of TCS was effectively amplified on DDT/Au-ErGO/GCE with low background current. Under optimal conditions, the linear response of TCS on the modified electrodes ranged from 0.500 nM to 20.0 µM. The detection limit was calculated to be 0.253 nM. The modified electrode presented a reliable, sensitive and selective determination of TCS. Moreover, the sensor exhibited favorable analytical performance in lake water and daily chemicals.
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SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Zhuan-li Bao,Hui Zhong,Xiao-rong Li,An-ran Zhang,Yi-xin Liu,Ping Chen,Zhi-peng Cheng,Hai-yan Qian
Herein, a novel electrochemical sensor based on core-shell Au@Ag nanoparticles deposited on carboxylated graphene (CG) was constructed for the simultaneous electrochemical determination of nitrite (NO 2 − ) and iodide (I − ). The CG/Au@Ag nanocomposite was prepared via two-step simple chemical reduction method. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to characterize the CG/Au@Ag nanocomposite. Au@Ag nanoparticles were distributed on the CG surface, providing more active sites for the electrocatalytic active center. The strong synergistic effect between Au@Ag nanoparticles and CG improved the conductivity of nanoparticles and provided a significant electrocatalytic performance on the flexible sensor. The CG/Au@Ag modified electrode showed a wide linear concentration range of 2.5–1250 μM, a low detection limit of 0.15 μM for NO 2 − and corresponding linear ranges of 3.5–1000 μM (peak I) and 500–1000 μM (peak II), and the detection limit of 0.1 μM for I − . It also demonstrated good anti-interference ability against various common interfering substances. Finally, the sensing platform was successfully applied to simultaneous determination of NO 2 − and I − in real samples. The present electrochemical strategy is promising to broaden the practical electrochemical application in environment.
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HYDROMETALLURGY
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2018
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IF 3.3
Zhike Wang,Boshuang Zhang,Cunling Ye,Lingyun Chen
Metal organic frameworks (MOFs) have diverse applications in adsorption/separation fields. However, little is known about MOFs as adsorbents for the adsorption of Au(III) from aqueous solutions. In this work, a highly porous MOFs, ZIF-8, was modified by thiourea (TU) via coordination-based post-synthetic modification strategy. Compared with pristine ZIF-8, the TU functionalized ZIF-8, TU*ZIF-8, exhibited a remarkable Au(III) adsorption ability with a saturation adsorption capacity of 4262.8 mg/g although its surface area and pore volume decreased with TU loading. Interestingly, the adsorption efficiency of Au(III) was >99% with a broad Au(III) concentration range of 50–400 mg/L using only 20 mg TU*ZIF-8. Meanwhile, TU*ZIF-8 showed an encouraging selectivity for Au(III) in the presence of some metal ions such as Cu(II), Cr(VI), Pb(II), Cd(II), Mn(II), Mg(II), and Co(II). The improved adsorption of Au(III) on TU*ZIF-8 is explained by the synergistic effect of electrostatic interaction and coordination interaction. Particularly, the coordination interaction between Au(III) and TU of TU*ZIF-8 plays a major role in the Au(III) adsorption process of TU*ZIF-8. This work suggests a potential application of functionalized MOFs for the efficient recovery of gold from aqueous solutions.
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TALANTA
·
2025
·
IF 6.1
Yuanyuan Li,Jiayi Peng,Hong Chen,Weiling Yue,Yixuan Liu,Xiaojun Luo,Lu Yang
The widespread accumulation of androgenic steroid endocrine disruptors in water and food has garnered increasing attention due to their significant risks to ecosystems and human health. These steroids, which cannot be completely eliminated, highlight the urgent need for advanced detection technologies. In this study, we present a novel emulsion-induced interface-anisotropic assembly strategy to synthesize bowl-like mesoporous polydopamine (PDA) particles, which exhibit high sensitivity in surface-enhanced Raman scattering (SERS) detection. In-situ reduction of chloroauric acid leads to the formation of Au nanoparticles (NPs) on the PDA surface, where synergistic Au-N interactions enhance the SERS performance. The distinctive bowl-like structure generates abundant "hot spots" on both sides, resulting in exceptional sensitivity. The low relative standard deviation (RSD) values (<11.7 %) across different PDA@Au NPs, along with real sample analyses (1.9–4.0 %), confirm the high reproducibility and uniformity of the SERS substrates, all achieved without the use of additional reducing agents. This cost-effective and straightforward method eliminates the need for complex surface treatments, making it particularly suitable for real-time detection of anabolic steroids across various matrices. These findings underscore the potential of bowl-like PDA materials for broader applications in clinical diagnostics, environmental monitoring, and sports doping control.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Zhiwei Wang,Yefan Zhou,Junsheng Wang,Yun Wang,Jianwei Zhao,Wenjia Xu,Yuhua Feng
Currently, hybrid noble metal nanostructures have garnered significant interest due to their exceptional properties and diverse applications in fields such as catalysis, energy conversion, plasmonic sensing, and surface-enhanced Raman scattering (SERS). In this work, we report the highly site-specific growth of a single Ag island on both the concave face and the sharp tip of concave Au nanocube (c-AuNC) seeds, resulting in different c-AuNC-Ag Janus heterostructures. This site specificity was achieved by combining the surface curvature effect of the c-AuNCs with strong ligand-mediated interfacial energy control. Further integration of interfacial energy and growth kinetic control led to the formation of c-AuNC-(Ag)n core–satellite structures with varying numbers of Ag satellites. Benefiting from the continuous tunability of the interfacial energy and growth kinetics, the structural evolution of the c-AuNC-Ag hybrid structures continuously occurred, enabling precise control of the Au–Ag bimetallic structures. Notably, the resulting c-AuNC-Ag structures showed tunable intense localized surface plasmon resonance (LSPR) absorptions within the 400–1000 nm wavelength along with strong SERS signals. The broad spectral absorption and strong SERS made the c-AuNC-Ag structures promising candidates for SERS and LSPR-based applications, including sensing, imaging, light energy harvesting, and conversion. Moreover, the effective synthetic control demonstrated in this work could facilitate the development of advanced hybrid metal nanomaterials with valuable properties, further broadening their application potential across various fields.
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Analytical Methods
·
2024
·
IF 2.7
Huanxin Xiao,Weiguang Chen,Mingxia Lin,Shilin Jiang,Xiping Cui,Suqing Zhao
Cervical cancer (CC) remains one of the most severe global health challenges affecting women, primarily due to persistent infection with high-risk human papillomavirus (HPV) subtypes, particularly with HPV16 and HPV 18. Effective detection of these high-risk HPV strains is crucial for CC prevention. Current screening programs for HPV DNA include PCR and in situ hybridization, which are accurate and sensitive. However, these approaches demand a high level of expertise, along with expensive instruments and consumables, thus hindering their widespread use. Therefore, there is a compelling demand to develop an efficient, straightforward, and cost-effective method. Herein, we propose a lateral flow immunoassay (LFIA) method based on Au@PdPt nanoparticles for the simultaneous detection and genotyping of HPV16 and HPV18 within 15 min. This innovative approach allows for qualitative assessment by the naked eye and enables semi-quantitative detection through a smartphone. In this study, under optimal conditions, the qualitative visual limits of detection (vLOD) for HPV16 and HPV18 reached 0.007 nM and 0.01 nM, respectively, which were 32-fold and 20-fold more sensitive than conventional AuNPs-LFIA for HPV16 and HPV18, respectively. Meanwhile, semi-quantitative limits of detection (qLOD) for HPV16 and HPV18 were 0.05 nM and 0.02 nM, respectively. In conclusion, our formulated approach represents a significant step forward in HPV detection and genotyping, with the potential to enhance accessibility and effectiveness in the early diagnosis of CC at the point of care and beyond.
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