Journal of Energy Chemistry
·
2025
·
IF 14.9
Xiaoping Wang,Bowen Yang,Haoye Wang,Haixin Guo,Richard Lee Smith,Yaqiong Su,Xinhua Qi
Photocatalytic oxidative dehydrogenation of biomass feedstocks offers the possibility for synthesizing value-added chemicals, but the sluggish transport kinetics and rapid recombination of photogenerated charge carriers constrain photocatalysis efficiency. Spin-polarized photocatalysts, by accelerating the separation of photogenerated electrons and holes, offer a promising strategy for selective biomass valorization. Herein, polarization unit Mo was incorporated into ZnIn 2 S 4 (ZIS) with S-vacancy through Mo–S 4 coordination (Mo-Vs-ZIS) to enhance hole and proton-coupled electron transfer (PCET). Mo-Vs-ZIS spin polarized photocatalyst applied to 5-hydroxymethylfurfural (HMF) afforded a 2,5-diformylfuran (DFF) selectivity of 92.3% at a production rate of 1105.3 µmol g cat −1 h −1 , attributed to carrier transport and reaction processes. The Mo-Vs-ZIS photocatalyst efficiently (100 min) converted benzyl and furfuryl alcohols, aromatic alcohols bearing electron-rich substituents, and halogen-substituted aromatic alcohols into their corresponding aldehydes. Piezoelectric force microscopy (PFM) and Kelvin probe force microscopy analyses (KPFM) revealed that the full-space polarized electric field was formed to drive directional transfer of photogenerated carriers, facilitating bulk-to-surface charge separation. Moreover, Mo-Vs-ZIS showed high Bader charge transfer to O 2 , where Mo atomic sites functioned as an electron reservoir, driving the activation of O 2 to form •O 2 − , a kinetically favorable step for HMF oxidation and induced transfer of holes to activate C( sp 3 )–H bonds, which is a rate-determining step. Then, the critical step of PCET (•O 2 − +H + →•OOH) over Mo-Vs-ZIS gave •OOH for O–H activation to complete the reaction sequence. This spin-polarized modification strategy featuring atomic-level catalytic sites enables its application to other semiconductor photocatalysts for biomass conversion.
研究领域:
光催化
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材料科学
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化学工程
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生物质转化
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有机合成
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能源与环境科学
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半导体催化
✓ 已验证
产品关联
DOI
高影响因子
Molecular Catalysis
·
2020
·
IF 3.687
Hai-Min Shen,Lei Liu,Bei Qi,Meng-Yun Hu,Hong-Liang Ye,Yuan-Bin She
Non-solvent and non-additive oxidation of secondary benzylic C–H bonds to aromatic ketones utilizing simple metalloporphyrins as catalysts and O 2 was investigated systematically. Based on systematical studies on reaction parameters, such as the structures of porphyrins, the types of central metals, the amount of catalyst, the pressure of oxygen, and the temperature, most aromatics with secondary benzylic C–H had been converted efficiently and selectively to their corresponding aromatic ketones catalyzed by the optimized metalloporphyrin catalyst T(2,3,6-triCl)PPCo. And the selectivity towards aromatic ketones reached up to 80 %–95 % with acceptable conversions in lower catalyst-loading (2.4 × 10 −3 %, mol/mol). The highest selectivity was achieved for substrate 1,2,3,4-tetrahydronaphthalene with the selectivity of 95.0 % in the conversion of 46.3 %. The superior catalytic performance of T(2,3,6-triCl)PPCo could be mainly ascribed to its excellent plane structure, superior ability for electron transfer and low positive charge around the central metal. All of above properties promoted the formation of catalytic active species high-valence cobalt-oxo complexes, and facilitated the approach of substrates to the catalytic active centers. This work presented an optimized balance among higher selectivity, milder conditions, lower catalyst-loading, and simpler catalysts compared with current documents, which was not only an efficient, practical and significant strategy to functionalize the widely available aromatics possessing secondary benzylic C H with high efficiency and selectivity under milder conditions, but also an important instance in the effective functionalization and utilization of other C H bonds employing optimized catalytic systems based on metalloporphyrins.
研究领域:
有机化学
·
催化化学
✓ 已验证
DOI
高影响因子
Molecular Metabolism
·
2024
·
IF 7
Binyu Lu,Shanshan Guo,Jialin Zhao,Xiaoting Wang,Bing Zhou
Objective Ferritin, the principal iron storage protein, is essential to iron homeostasis. How iron homeostasis affects the adipose tissue is not well understood. We investigated the role of ferritin heavy chain in adipocytes in energy metabolism. Methods We generated adipocyte-specific ferritin heavy chain ( Fth , also known as Fth1 ) knockout mice, herein referred to as Fth AKO . These mice were analyzed for iron homeostasis, oxidative stress, mitochondrial biogenesis and activity, adaptive thermogenesis, insulin sensitivity, and metabolic measurements. Mouse embryonic fibroblasts and primary mouse adipocytes were used for in vitro experiments. Results In Fth AKO mice, the adipose iron homeostasis was disrupted, accompanied by elevated expression of adipokines, dramatically induced heme oxygenase 1( Hmox1 ) expression, and a notable decrease in the mitochondrial ROS level. Cytosolic ROS elevation in the adipose tissue of Fth AKO mice was very mild, and we only observed this in the brown adipose tissue (BAT) but not in the white adipose tissue (WAT). Fth AKO mice presented an altered metabolic profile and showed increased insulin sensitivity, glucose tolerance, and improved adaptive thermogenesis. Interestingly, loss of ferritin resulted in enhanced mitochondrial respiration capacity and a preference for lipid metabolism. Conclusions These findings indicate that ferritin in adipocytes is indispensable to intracellular iron homeostasis and regulates systemic lipid and glucose metabolism.
研究领域:
分子生物学
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代谢
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细胞生物学
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内分泌学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Cell Reports Physical Science
·
2022
·
IF 7.832
Tangyou Sun,Jie Tu,Zhiping Zhou,Rong Sun,Xiaowen Zhang,Haiou Li,Zhimou Xu,Ying Peng,Xingpeng Liu,Peihua Wangyang,Zhongchang Wang
Two-dimensional materials resistive random-access memories (RRAMs) are known to exhibit excellent nonvolatile resistive switching (NVRS) performance. However, most two-dimensional materials are produced as monocrystal films with little attention paid to their stacked, discontinuous, and loose polycrystal states, which may allow for more facile atomic diffusion. Here, we propose a liquid-phase self-assembly (LPSA) method to fabricate stacked hexagonal boron nitride (h-BN) polycrystal film (SHPF) and demonstrate its NVRS behavior. Three device architectures with different electrodes are studied, all of which exhibit resistive switching behaviors. The Al/h-BN/Pt device shows 120 current-voltage (I-V) sweeps without degradation, and the Al/h-BN/ITO device exhibits an on/off ratio of ∼10 4 . The proposed LPSA method can serve as a facile and low-cost way to fabricate memory materials on arbitrary substrates. Moreover, stacked, discontinuous, and loose polycrystal film can facilitate the study of NVRS, which opens up an additional avenue for many potential functional applications.
研究领域:
材料科学
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电子工程
✓ 已验证
DOI
高影响因子
Processes
·
2022
·Vol. 10
·期 6
·1165
·
IF 3.352
Erdong Yao,Bojun Li
This paper presents a low-cost, high-temperature-resistant and high-strength polyacrylamide gel system formed by secondary cross-linking. The gel system (named JM186) used phenolic resin and organic zirconium as cross-linking agents, and the performance of the gel system was systematically evaluated under high temperature. The gel properties studied include: gel formation time, gel strength, thermal stability, sand-filled pipe sealing efficiency, and its microstructure. The concentration of polyacrylamide in JM186 gel system was as low as 0.3%, which can control the gelling time in a range of 1–9 h by adjusting the ratio of two cross-linking agents. It can resist temperature up to 120 °C without dehydration, and its highest gel strength can reach H grade. The modulus of elasticity (G’) and viscosity (G”) can reach 32.33 Pa and 3.25 Pa, respectively. DSC (differential scanning calorimetry) test indicated that the temperature of structural failure for this composite gel is 310.5 °C. The average sealing efficiency of the gel is 96.03% in sand-filled pipes. Finally, the gel microstructure was observed by cryo-scanning electron microscopy (Cryo-SEM). It was found that the gel system by secondary cross-linking has a dense and thickened network structure compared with the single cross-linker gel system. The gel is cross-linked by both the coordination bond and covalent bond, and the two cross-linking agents have a synergistic effect. This is the reason why the secondary cross-link gel system is better than the single-cross-linker gel system.
研究领域:
材料科学
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石油工程
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化学工程
✓ 已验证
DOI
高影响因子
Nanomedicine-Nanotechnology Biology and Medicine
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2021
·
IF 6.458
Song-Bin Yang,Xiao-Liu Li,Kai Li,Xin-Xin Zhang,Mei Yuan,Yi-Sha Guo,Xia Bi
Stroke is one of the most serious problems that seriously affect people's health and brings huge economic burden to society. The development of new nanocarriers with desired degradability and targeted ability is of great significance for efficient drug delivery. In recent years, nano drug delivery system has developed rapidly and applied to treat ischemic stroke . Here, we report the synthesis and functionalization of monodisperse hollow structured MnO 2 (H-MnO 2 ). The highly monodisperse H-MnO 2 with uniform morphology was obtained by in situ growing MnO 2 on solid silica nanoparticles and subsequently removing the silica core. After successive modification of poly ethylene glycol(PEG), we further verified their protective effect on ischemic stroke in our study.
研究领域:
医学
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生物材料学
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神经科学
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Shaoxiong Li,Huiyu Duan,Tong Xu,Yueshuai Wang,Longcheng Zhang
Abstract Direct seawater electrolysis at industrially relevant current densities is constrained by chloride adsorption, competing chlorine oxidation, and accelerated anode corrosion. Here, we identify interfacial stannate formed during anodic operation as a key species responsible for suppressing Cl– adsorption and competing chlorine evolution. Operando Raman spectroscopy, inductively coupled plasma mass spectrometry, and time-of-flight secondary ion mass spectrometry reveal the partial dissolution of incorporated Sn species and the enrichment of stannate at the reconstructed catalyst–electrolyte interface, while density functional theory calculations further support its role in weakening Cl– adsorption. The resulting Sn-containing NiFe anode requires an overpotential of 377 mV to reach 1 A cm–2 and sustains operation at 1 and 2 A cm–2 for 1500 and 850 h, respectively. An anion-exchange-membrane electrolyzer further delivers 1 and 4 A cm–2 at cell voltages of 1.90 and 2.54 V at 80 °C, operates continuously for 1000 h at 1 A cm–2, and withstands 4500 start–shutdown cycles over 250 h. These results establish a direct link between working-state stannate chemistry and long-term chloride resistance under ampere-level seawater electrolysis.
✓ 已验证
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Shuai Wang,Haoran Wang,Jiguo Tu,Lei Huang,Shenzhen Deng,Bingang Xu,Lei Wei
Hydrogen evolution reaction and Zn dendrite growth, originating from high water activity and the adverse competition between the electrochemical kinetics and mass transfer, are the main constraints for the commercial applications of the aqueous zinc-based batteries. Herein, a weak H-bond interface with a suspension electrolyte is developed by adding TiO2 nanoparticles into the electrolytes. Owing to the strong polarity of Ti–O bonds in TiO2, abundant hydroxyl functional groups are formed between the TiO2[110] active surface and aqueous environment, which can produce a weak H-bond interface by disrupting the initial H-bond networks between the water molecules, thereby accelerating the mass transfer of Zn2+ and reducing the water activity. In consequence, the Zn||Zn symmetrical cells display reversible Zn plating/stripping behaviors with a high Coulombic efficiency of 99.7% over 700 cycles. Moreover, the TiO2-based suspension strategy is also applicable to other zinc salt systems and exhibits fast plating/stripping behaviors. The suspension electrolyte enables long-term full cells, including Zn||PANI hybrid capacitors and Zn||ZnVO full batteries.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Jianguo Wang,Meng Chen,Xiangkun Elvis Cao,Xianglei Liu,Peidong Wei,Qiao Xu,Haichen Yao,Enda Ci,Qingfeng Zhang,Shushan Lv,Yang Tian,Yongliang Li
Thermal energy, encompassing both heating and cooling demands, accounts for the largest share of global energy consumption. Harvesting thermal energy from the environment, including the Sun and darkness, holds promise for decarbonizing thermal sectors, but suffers from low efficiency and intermittency. Here, inspired by ginkgo leaves featuring wax-coated vertical palisade cells, a 24-h bidirectional thermal energy harvesting approach is developed by integrating spectrally selective aerogels with anisotropic composite phase change materials (CPCMs). During daytime, sunlight is captured, converted into heat, and stored in anisotropic CPCMs with high axial thermal conductivity (24.16 W·m −1 ·K −1 ) and an anisotropy ratio of 3.7. Under one-sun irradiation, a high solar thermal energy storage efficiency of 87.5% with a peak temperature of 382.3 K is achieved by leveraging spectrally selective aerogels exhibiting “greenhouse effects”. At night, a maximum radiative cooling power of 118.8 W·m −2 is attained, enabling cold energy storage at a temperature 4.0 K below ambient. The proposed leaf-inspired device operates continuously over 24 h, delivering annual thermal energy savings of 5321.4 MJ·m −2 ·yr −1 , outperforming standalone solar thermal and radiative cooling systems by 44.8% and 223.3%, respectively. This bioinspired bidirectional energy harvesting strategy employing both solar and outer space resources, establishes a promising approach toward a carbon-neutral thermal energy supply.
研究领域:
可再生能源
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热工工程
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材料科学
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可持续技术
·
仿生学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2022
·Vol. 12
·期 1
·1-8
·
IF 4.996
Weng Yue,Su Chun-Jen,Jiang Haoyang,Chiang Chien-Wei
Site-selectively chemical bioconjugation of peptides and proteins can improve the therapeutic exploration of modified protein drugs. Only 3.8% natural abundance of phenylalanine in protein and nearly 90% of proteins contain at least one phenylalanine residue in their sequenced, showing the potential in biopharmaceutical utility of the phenylalanine bioconjugation. However, the covalent bioconjugation of native phenylalanine is one of the most challenging problems in protein modification. Herein, an approach to protein modification is described that relies on a photoredox method for the site-selective bioconjugation of phenylalanine. This methodology has been validated on peptides as well as protein insulin using a straightforward and mild condition. In addition, based on characterization by near-UV CD spectroscopy and small angle X-ray scattering (SAXS), this pyrazole labeling approach permitted the insulin hexamer to completely dissociate into the monomeric form, thus making it a potential candidate for use as rapid-acting insulin for the treatment of diabetes.
研究领域:
生物化学
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药物化学
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分子生物学
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2021
·
IF 7.46
Changying Cao,Quanhong Chang,Huijie Qiao,Runze Shao,Xin Guo,Guina Xiao,Wangzhou Shi,Lei Huang
The diffusion of generated H + ions in glucose sensing process is critical for the sensitivity of sensor. Although many glucose sensors assembled by two dimensional (2D) materials (MXene, graphene, MoS 2 et al.) have been extensively studied, the detailed analyses about the diffusion of H + ions are still rarely reported. Herein, hybrid Ti 3 C 2 -rGO film is fabricated by electrostatic self-assembly utilizing the 2D Ti 3 C 2 and graphene sheets to focus on the H + ion’s diffusion dynamic properties related to the sensing performance. Through controlling the graphene content, this hybrid Ti 3 C 2 -rGO film provide the effective H + ion diffusion channels. Based on the comprehensive analyses of cyclic voltammogram (CV) and electrochemical impedance spectroscopy (EIS), the corresponding localized conduction and enzymatic reaction at interfaces between the Ti 3 C 2 -rGO electrodes and glucose solution were investigated. According to the Warburg impedance in Nyquist plot from EIS, it is certified that the H + ion diffusion in low frequency range may play a significant role in the sensing mechanism of the glucose sensor. Moreover, the relationship derived from the interaction including interlayer spacing, H + ion diffusion and the sensing performance further reveal the H + ion diffusion as the dominant origin of the enhanced glucose sensitivity. This analysis will provide fundamental insight into the electrode structures assembled with 2D materials to optimize the sensor design in terms of ion transport dynamics.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Wen Liao,Fangxia Xie,Lulu Zhang,Qing Xi,Long Cao,Yawen Wang,Yunfang Wang,Houfen Li,Rui Li,Caimei Fan,Jianxin Liu,Jiancheng Wang
Photocatalytic water splitting for hydrogen evolution (PHE) is an effective and sustainable strategy to alleviate energy shortages and environmental issues. However, active hydrogen (H*), as a critical intermediate, has low generation and desorption rates that limit the development of PHE. Herein, a ZnCdS/MoO 3-x heterojunction is prepared by a two-step solvothermal method and applied to a photocatalytic hydrogen evolution reaction under visible light conditions. The band structure and electron spin resonance (ESR) confirm the formation of an S-scheme heterojunction in ZnCdS/MoO 3-x , promoting the utilization of photo-generated carriers and thereby enhancing H* generation on ZnCdS. Furthermore, in-situ ESR, quasi in-situ Raman spectroscopy and in-situ DRFTIRS spectroscopy demonstrate that the H* is subsequently transferred from ZnCdS to MoO 3-x via the hydrogen spillover effect. The H* is then confined within the lattice of MoO 3-x and forms H x MoO 3-x in situ. Finally, the electrochemical tests and DFT calculations demonstrate that the H x MoO 3-x acts as a “hydrogen pump”, lowering the H* desorption barriers and ultimately enhancing the hydrogen evolution of the system. Therefore, the optimum hydrogen evolution rate of ZnCdS/MoO 3-x reaches 7.9 mmol·g −1 ·h −1 , which is 26.3 times higher than that of pure ZnCdS, along with a hydrogen storage capacity of 0.36 wt%. This work offers a novel approach for achieving efficient and sustained PHE reactions by modulating the generation and desorption rates of the intermediate H*.
研究领域:
光催化
·
材料科学
·
能量转换
·
环境科学
·
物理化学
✓ 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）