RSC Advances
·
2016
·Vol. 6
·期 59
·54377-54381
·
IF 3.289
Dingyi Wang,Shengmei Guo,Rongxing Zhang,Sen Lin,Zhaohua Yan
An efficient procedure for the formation of C–S bonds via C–H functionalization was developed for the synthesis of aryl sulfides in good to excellent yields using TBAI–HBr system promoted direct sulfenylation of various compounds, such as phenols, pyrazolones, indoles and related heteroarenes. Low cost and widely available arylsulfonyl chlorides were used as the sulfur source to provide various sulfur-containing compounds. The characteristic of the present protocol is convenient, green, highly efficient with a wide-application and short reaction time.
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2021
·
IF 5.161
Beibei Chen,Zhe Dong,Jiaye Li,Mengjie Zhang,Kan Zhang
Hexagonal boron nitride (h-BN) is a promising additive used in tribology ; however, its application is limited due to its poor interfacial combination with polymer matrices induced by its inert and smooth surface. In order to tackle this problem, an innovative ZnO nanowires-decorated h-BN hybrid was first prepared, which was then applied onto epoxy (EP) to enhance its tribological properties. The results demonstrated that ZnO nanowires were in-situ grown uniformly on the exterior of the hydroxylated h-BN, which strengthened the physical and chemical interaction between h-BN and EP, since the EP chains were prone to wrap around the ZnO nanowires. When the h-BN/ZnO content was 0.5 wt%, the friction coefficient and wear rate were decreased by 81.5% and 95.4%, respectively, and the corresponding composite coating possessed superior tribological properties under harsh conditions, which was mainly because of the synergistic reinforcing and lubricating effect between the ZnO nanowires and h-BN, as well as the good interfacial compatibility between h-BN/ZnO hybrid and EP. Moreover, the corresponding enhancement mechanisms of h-BN/ZnO were proposed.
研究领域:
材料科学
·
摩擦学
✓ 已验证
DOI
高影响因子
Materials Today Chemistry
·
2026
·
IF 7.4
Mingjun Cui,Shijun Huang,Jiate Xue,Xinyu Chen,Siming Ren
2D nanocontainers are prepared with barrier, corrosion inhibition and monitoring. • BZ-P/EP coating shows higher .|Z| f = 0.01 Hz of 4.1 × 10 10 Ω cm 2 after 60 days immersion. • PH-responsive ZIF-8 enables the rapid release of Phen under acidic conditions. • Visual corrosion warning is achieved via Fe 2+ –Phen coordination. To overcome the limitations of conventional anticorrosion coatings, which typically exhibit single functionality and lack early-stage corrosion warning capability, this study presents the design and fabrication of a two-dimensional intelligent nanocontainer system. Specifically, a pH-responsive zeolitic imidazolate framework (ZIF-8) was grown in situ on hexagonal boron nitride (h-BN) nanosheets, and subsequently loaded with 1,10-phenanthroline (Phen), enabling the integration of physical barrier protection, active corrosion inhibition, and visual corrosion monitoring. UV–vis absorption spectra and electrochemical impedance spectroscopy (EIS) results demonstrate that the BZ-P nanocontainers not only provide effective corrosion inhibition but also exhibit rapid, pH-triggered release of Phen in mildly acidic conditions. After incorporation into an epoxy matrix, the resulting BZ-P/EP composite coating exhibits a high low-frequency impedance modulus (|Z| f = 0.01 Hz ) of 4.1 × 10 10 Ω cm 2 after 60 days of immersion in 3.5 wt% NaCl solution, which is approximately 2270 times higher than that of the neat epoxy coating. This improvement is accompanied by a significant reduction in oxygen content on the underlying steel surface (from 19.56 wt% to 0.62 wt%), indicating markedly suppressed corrosion. Under damaged coating conditions, the BZ-P/EP system maintains effective corrosion protection, as evidenced by a relatively high impedance modulus and low local admittance. This enhanced performance can be attributed to the synergistic effects of BN and ZIF-8, which combines structural barrier reinforcement with active corrosion inhibition. Furthermore, the released Phen molecules at damaged sites coordinate with Fe 2+ ions to form a red complex, enabling rapid and intuitive visual detection of corrosion initiation. This work provides a novel strategy for developing intelligent coating systems that integrate corrosion protection, active corrosion inhibition, and real-time monitoring, offering significant potential for applications in harsh service environments.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Zhenzhong Tao,Huaixiang Li,Dedong He,Zijun Huang,Jun Liang,Jiaming Dong,Xiaohua Cao,Yongming Luo
The reverse water gas shift (RWGS) reaction has garnered significant attention for its ability to selectively convert CO 2 into CO. However, conventional transition metal catalysts often face challenges such as the generation of byproducts at low temperatures and sintering at high temperatures. In this study, a series of Ga/Al 2 O 3 catalysts with varying Ga loadings was prepared using the impregnation method. Notably, these catalysts exhibit nearly 100% CO selectivity across a broad temperature range of 300–700 °C, with stable catalytic activity maintained after 165 h of testing at 600 °C. Characterization reveals Ga species exist as highly dispersed Ga 2 O 3 on the Al 2 O 3 support. The formation of Ga δ+- H species occurs under an H 2 atmosphere, accompanied by the creation of oxygen vacancies. In situ DRIFTS spectroscopy confirms Ga δ+ -H as the key active site for RWGS, and this species undergoes reversible regeneration in a H 2 environment. This work first reveals the pivotal role of Ga δ+ -H in driving the highly selective RWGS reaction. By promoting CO 2 activation and the formation of key formate intermediates, it achieves nearly 100% CO selectivity. This discovery provides novel design insights and theoretical foundations for developing highly efficient CO₂ conversion catalysts.
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Jinbao Li,Jialin Zhang,Chi Zhang,Qiao Yao,Xuan Zhao,Li Ma,Jing Bai,Yunting Liu,Yanjun Jiang,Guanhua Liu
Abstract Unspecific peroxygenase (UPO) catalyzes selective oxyfunctionalization of C–H bonds using H2O2 but suffers from enzyme instability and substrate solubility issues. To address these challenges, a cobalt and nitrogen co-doped carbon nanotubes electrocatalyst with two-electron oxygen reduction performance was developed to electrocatalytically generate H2O2 in situ to avoid the damage from adscititious H2O2. This approach maintains the H2O2 concentration in the reaction system to balance the reactivity and oxidative inactivation of UPO. Meanwhile, a covalent organic framework (COF, TpTa) with good biocompatibility was selected as the carrier to prepare AaeUPO@TpTa immobilized enzymes, enhancing enzyme stability and substrate enrichment. By integrating the in situ H2O2 generation system via electrocatalysis with immobilized enzyme catalysis, and using 4-ethylbenzoic acid as a model substrate, the reaction achieved a 99.1% yield of 4-(1-hydroxyethyl)benzoic acid after 16 h, with broad substrate applicability and excellent enantioselectivity (94–99% ee). The constructed electroenzymatic cascade catalysis system enables efficient C–H bond hydroxylation.
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 3
·123051
·
IF 7.5
Yonghao Wang,Shiying Li,Youmei Liu,Zhiwei Zou,Xiaomei Zheng,Yongjing Wang
Electrocatalytic nitrate reduction to ammonia (NO₃RR) offers a promising route for wastewater treatment and nitrogen resource recovery. In this work, a FeNi alloy-loaded carbon material (FeNi-C) was evaluated about NO 3 RR performance and the role of different active hydrogen (H*) was illustrated. FeNi(1:1)-C obtained at 700 °C exhibits a 96.6% NO 3 ⁻ -N removal and 99.6% NH₄ ⁺ -N selectivity at −1.5 V and it maintains excellent performance over 10 cycles without metal leaching. Furthermore, high-concentration nitrate can be converted to ammonium, recovered as struvite. Mechanism analysis indicate that a high surface coverage of adsorbed atomic hydrogen (H* ads ) is more crucial for enhancing the selectivity of nitrate-to-ammonia conversion compared with the free H*（H* free ）in the electrolyte. Tafel slope combined with verification experiments reveal that an optimal Ni 0 /Ni 2+ (≈2) facilitates water electrolysis to enables FeNi(1:1)-C forming a high surface coverage of H* ads . Thereby, FeNi(1:1)-C maintains an abundant H* ads -covered reductive-microenvironment surface, promoting fast conversion between H* ads and the adjacent nitrogen-containing intermediates and suppressing the competing hydrogen evolution reaction (HER). Furthermore, this reductive-microenvironment surface also helps protect the FeNi alloy from oxidation, endowing its superior stability. This work highlights the superior role of H* ads over H*（H* free ）in the electrolyte.
✓ 已验证
DOI
高影响因子
Coatings
·
2026
·Vol. 16
·期 6
·711
·
IF 3.4
Hui Liu,Yu Zhu,Xin Cheng,Zhenhua Dong,Qiang Liu
Superhydrophobic materials offer promising prospects for utilization in energy, environmental, and related fields. However, their long-term stability in natural environments is constrained by factors such as mechanical wear and aging, which compromise their practical effectiveness and service life. While notable experimental results have been obtained worldwide, scalable application remains limited by the complexity of the requisite fabrication processes. In this study, a durable superhydrophobic coating was developed through a facile one-step process, utilizing a polyaspartic ester (PAE) matrix reinforced with a composite of self-synthesized fluorinated silica (F-SiO2) and hexagonal boron nitride (h-BN) micro-/nano-structures. This strategy effectively enhanced filler dispersion within the resin matrix and promoted hydrophobicity, yielding a stable superhydrophobic surface. The resulting coating exhibits significant potential for scalable application. The optimized coating demonstrated a water contact angle of 161.2° and a roll-off angle of 7.6°, showing excellent repellency to water, corrosive liquids, and fluids across a wide pH range, along with remarkable self-cleaning performance. Benefiting from the synergistic enhancement of h-BN and F-SiO2, the coating also exhibits superior mechanical durability, maintaining a contact angle of 144.4° after 1000 abrasion cycles. Furthermore, in low-temperature anti-icing tests, the coating significantly delayed ice formation on its surface. Notably, after 1000 h of UV aging tests, the F-SiO2@BN/PAE coating retained its intact superhydrophobic structure, with the water contact angle only slightly decreasing from 159.6° to 152.8°, still within an excellent superhydrophobic state, demonstrating outstanding weather resistance. By integrating surface functionalization with mechanical reliability through a facile one-step fabrication process, this study provides significant insights for the large-scale application of hydrophobic materials in the energy and transportation sectors.
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.2
Chenchen Xiong,Weihuan Li,Jiarui Xing,Shengjun Chen,Yulin Wang,Yang Zhou
Low toughness remains an enduring constraint to cementitious materials. Manipulating calcium silicate hydrate (C-S-H), the “genetic component” of cement, which determines mechanical properties of cementitious materials, presents an attractive strategy for intrinsic toughening. However, the modulation is constrained by small-length scale and limited enhancement. Herein, this work proposes an approach to fabricate nacre-mimetic C-S-H bulk composite with brick-mortar microstructure. The composite exhibits an excellent combination of high flexural strength, toughness and impact resistance, with toughness surpassing pure C-S-H and cement paste by factors of over 1000 times, and even outperforming that of natural nacre, reinforced cement-based materials and existing reported C-S-H-based materials. The nacre-mimetic C-S-H composite also exhibits a 20- to 30-fold increase in impact resistance and flexural strength compared to pure C-S-H, respectively. Multi-scale simulations reveal strengthening and toughening mechanisms, including molecular-scale coordination, nano-asperities, viscoplastic deformation, and crack deflection across micro-macro scales. The developed C-S-H nacre not only achieves remarkably high toughness and broadens the potential for scalable application, but also paves a way for designing advanced bioinspired cementitious and silicate-based materials in structural applications.
✓ 已验证
DOI
高影响因子
EUROPEAN POLYMER JOURNAL
·
2020
·
IF 3.862
Yuejia Zhu,Yongzhu Hu,Zhenjiang Li,Bo Liu,Yuanyuan Qu,Zhihao Zhang,Tianfo Guo,Yongqiang Li,Luoyu Gao,Kai Guo
Hydrogen bond donor (HBD) and organic base binary cocatalyst established a gold standard in organocatalytic ring-opening polymerizations (ROPs). In depth probe of the mechanisms revealed that proton abstraction of the acidic H on the HBDs by the bases do occur frequently. A truly simple HBD and Lewis base (LB) cocatalysis, however, was elusive. We proposed genuine HBD/LB cocatalyst for ROPs by introducing 3-amino-1,2,4-benzothiadiazine-1,1-dioxide (ABTD) as a bidentate H-bond donor and triethylamine (TEA) as a mild Lewis base. ROPs of lactide (LA) and trimethylene carbonate (TMC) in solutions at room temperature were success. The mild ROPs produced polylactide (PLA) of predictable molecular weights (from 1.6 to 26.7 kg mol −1 ) and extremely narrow dispersities (Đ 1.01 to 1.06). Furthermore, well-defined diblock copolymers PTMC-b-PLA were synthesized. NMR titration experiments verified exclusive H-bond donor activation of the monomer and TEA activation of the hydroxyl chain end without trace of proton abstraction.
研究领域:
化学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Siying Zhao,Xiaotong Liu,Yulan Wang,Haoqing Tang,Tian Tian,Yizhi Yue,Qiang Weng,Tao Liu
Furious dendritic growth and destructive parasitic reactions (hydrogen evolution reaction, corrosion, and passivation) severely degraded the development of aqueous Zn-ion batteries (AZIBs) in the field of grid and stationary energy storage. Herein, trace amount of tetracycline hydrochloride (TC-HCl) additive (only 0.5 mM) is employed as a mediator to steer a stable Zn anode-electrolyte interface. Informed by theoretical calculations and experiment analysis, TC molecule with zincophilic groups can remodel the solvation sheath and disrupt H-bonds network due to its high electronegative O atoms, which effectively expedites the desolvation process and reduces the electrochemical activity of solvent water. Additionally, the TC molecules are preferentially adsorbed on the Zn electrode than active water molecules, which are beneficial for steering uniform nucleation and restricting the erosion of electrode. Benefitting from these synergistic effects, the Zn//Zn symmetric cell containing TC-HCl additive exhibits an ultra-long cycle life of exceeding 2200 h at 1.0 mA cm −2 and 1.0 mAh cm −2 . Accordingly, the practical Zn//α-MnO 2 full cell using the modified electrolyte also demonstrates the enhanced performance. This study provides valuable insights into the widespread use of trace electrolyte additives and facilitates the industrialization of AZIBs with long lifespans.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Jiami Ma,Zhixin Hu,Weihong Guo,Cheng Ni,Pan Li,Bosheng Chen,Songhua Chen,Jinlong Wang,Yanbing Guo
Ground−level ozone (O 3 ) pollution poses a significant threat to both ecosystem sustainability and human health. The catalytic decomposition of O 3 presents as a promising technology to address the issues of O 3 pollution. This study undertook the synthesis of various functionalized metal−organic framework (MOF) catalysts ( i.e., X-MIL-53(Fe) (X = H, NH 2 , NO 3 )) to delve into the influence of ligand functional groups on skeletal structure and catalytic efficacy, particularly focusing on unraveling the mechanism of O 3 catalytic decomposition under humid conditions. NH 2 -MIL-53(Fe) catalyst achieved complete O 3 decomposition under ambient temperature and high humidity conditions (RH=75 %), exhibiting a reaction rates (mol·m −2 ·s −1 ) 129 and 10.5 times greater than that of MIL-53(Fe) and NO 2 -MIL-53(Fe). The NH 2 group promotes electron flow within the backbone towards the hydroxyl group (OH) linked to Fe atom. In humid O 3 , H 2 O molecules augment the interaction between O 3 and NH 2 -MIL-53(Fe), and OH is converted to·O 2 − after deprotonation, promoting O 3 decomposition. Additionally, leveraging three−dimensional (3D) printing technology, a monolithic catalyst for O 3 decomposition was prepared for application. This study not only advances understanding of the mechanisms underlying O 3 decomposition but also offers practical solutions for addressing O 3 pollution at humid conditions.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
Materials
·
2019
·Vol. 12
·期 24
·4112
·
IF 2.972
Yongzhe Tang,Peng Zhang,Mingxiao Zhu,Jiacai Li,Yuxia Li,Ziguo Wang,Liangsong Huang
Epoxy–boron nitride composites are promising insulating materials, and it is highly important to understand their insulating performances at different temperatures with different nano-doping amounts. In this study, we investigated the effects of different mass fractions of epoxy–micron hexagonal boron nitride composites on their thermal conductivity, as well as the effects of temperature and mass fraction on their insulating performances. The results demonstrated that the thermal conductivity of epoxy–micron hexagonal boron nitride composites was superior to that of neat epoxy. The thermal conductivity of epoxy–micron hexagonal boron nitride composites increased with the mass fraction of hexagonal boron nitride, and their dielectric constant and dielectric loss increased with temperature. The dielectric constant of epoxy–micron hexagonal boron nitride composites decreased as the mass fraction of hexagonal boron nitride increased, while their dielectric losses decreased and then increased as the mass fraction of hexagonal boron nitride increased. Due to internal heat accumulation, the alternating current breakdown strength of epoxy–micron hexagonal boron nitride composites increased and then decreased as the mass fraction of hexagonal boron nitride increased. Additionally, as the temperature increased, the composites transitioned from the glassy state to the rubbery or viscous state, and the breakdown strength significantly degraded.
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）