JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jing Niu,Zhelin Song,Xin Gao,Yun Ji,Yanlin Zhang
It is of great significance to achieve superior degradation of contaminants by developing efficient and stable photocatalysts . To boost the photocatalytic performance of Bi 2 WO 6 for tetracycline degradation, the Bi 2 WO 6 composites ( Bi 2 WO 6 /C@Cu 2 O) were constructed by introducing Cu 2 O coated by carbon layer (C@Cu 2 O with 5 wt% of Bi 2 WO 6 ) in this study. Bi 2 WO 6 /C@Cu 2 O presents an excellent performance on tetracycline degradation because of the generation of more active species as ∙ O 2 - and ∙ OH. Its kinetic rate constant k was 2.8 times of pure Bi 2 WO 6 and tetracycline degradation efficiency maintained outstanding stability even after 4 cycles. This benefits from the higher photogenerated charge separation and electron transfer possessed by Bi 2 WO 6 /C@Cu 2 O compared to Bi 2 WO 6 . Various intermediates of tetracycline degradation were identified and the possible degradation pathways were proposed. The tetracycline degradation by Bi 2 WO 6 /C@Cu 2 O followed a Z-scheme photocatalysis mechanism. In addition to acting as the protective layer of Cu 2 O to attenuate the photo-corrosion of Cu 2 O, the oxygen containing functional groups C O on the surface of carbon layer could provide an electron transfer channel between the interface of Bi 2 WO 6 and Cu 2 O to reduce the interfacial charge-transfer resistance and accelerate the electron transfer.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 4
·045601
·
IF 1.449
Hao Li,Genliang Hou,Qi Tian,Song Bi,Zhaohui Liu,Yangyang Lin,Jin Tang,Xunjia Su
Fluorinated graphene oxide (FGO) with high fluorine content is a suitable alternative for superhydrophobic materials due to the existence of the C–F bond. In this paper, we demonstrate a facile, large-scale method for the preparation of FGO with higher oxygen content and fluorine content by adopting proper oxidants and solvent to oxidize commercial graphite fluoride (GIF) on the basis of modified Hummers' method. Chemical composition, morphology and hydrophobicity are characterized by FT-IR, XPS, TGA, TEM and contact angle (CA) test respectively. The results indicate that the increase in oxygen content is accompanied by a decrease in fluorine content and FGO fabricated by using KMnO4 and the mixture of CH3COOH: H2SO4 with a volume ratio of 3:1 owns higher O/C and F/C ratio and superhydrophobicity. The oxidation mechanism is speculated that fluorine atom detaches from GiF in a strong oxidation environment, resulting in the restoration of sp2 C=C bond partly, and then sp2 C=C bond could be oxidized by KMnO4 or K2FeO4 efficiently. More oxygen groups broaden the applications of FGO as hydrophobic materials.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
BIOMASS & BIOENERGY
·
2025
·
IF 5.8
Shanshan Shao,Haochuan Yang,Yu Cao,Jiayuan Sun,Xiaohua Li,Shiliang Wu
This study aims to produce oxygen-containing precursors for jet fuel through directed carbonylation and C-C coupling of aqueous bio-oil (AQBO), focusing on exploring the impact of the complex compositions in AQBO and the catalyst properties on reaction mechanisms in the preparation process. There are two major limitations among current research on the preparation of jet fuel precursors from biomass: first, most studies are based on model compounds of AQBO; second, the yield of jet fuel precursors is low. In this study, to address these limitations, the mechanisms of carbonylation and C-C coupling were investigated by mixing model compounds (furfural, acetone and butyraldehyde) in AQBO, and the relative peak area of the jet fuel precursor reached 89.6 % when 16 % furfural was mixed. The priority of the coupling reaction of aldehydes and ketones was described as follows: cycloketone with linear aldehyde > cycloketone with cycloketone > cycloketone with linear ketone. Based on the investigation of active sites in the composite catalyst for carbonylation and coupling reactions, we designed an improved catalyst using red mud (RM) as a bifunctional catalyst carrier. The efficient conversion of agricultural wastes and red mud into jet fuel is achieved, with the resulting products further serving as sustainable aviation fuel (SAF) precursors, demonstrating potential for carbon intensity (CI) reduction and facilitating the valorization of low-value biomass and industrial residues.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2017
·Vol. 31
·期 12
·e3854
·
IF 2.319
Xiaojun Ma,Guanghui Lv,Xu Cheng,Weijian Li,Rui Sang,Yong Zhang,Qiantao Wang,Li Hai,Yong Wu
An environmentally friendly palladium(II) catalyst supported on cyclodextrin-modified h-BN was successfully prepared. The catalyst was characterized by FT-IR, SEM, TG, XRD and XPS, and the loading level of Pd in h-BN@β-CD@Pd(II) was measured to be 0.088 mmol g −1 by ICP. It exhibits excellent catalytic activity for the Suzuki and Heck reactions in water, and can be easily separated and consecutively reused for at least nine times. In addition, a series of pharmacologically interesting products were successfully synthesized using this catalyst to demonstrate its potential applications in pharmaceutical industries. Above all, this work opens up an interesting and attractive avenue for the use of cyclodextrin-functionalized h-BN as an efficient support for hydrophilic heterogeneous catalysts.
研究领域:
材料科学
·
催化化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Kangwang Wang,Mingjie Wu,Peifeng Yu,Hector F. Garces,Ying Liang,Longfu Li,Lingyong Zeng,Kuan Li,Chao Zhang,Kai Yan,Huixia Luo
Despite ongoing research, the rational design of non-trivial topological semimetal surface states for the selective photocatalytic CO 2 conversion into valuable products remains full of challenges. Herein, we present the synthesis of lattice-matched 1 T-OsCoTe 2 for the photoreduction upgrading of CO 2 to tri-carbon (C 3 ) alkane (propane, C 3 H 8 ) by the integration of experimental work and theory prediction/calculation. Experimental studies suggested a high electron-based selectivity of 71.2 % for C 3 H 8 and an internal quantum efficiency of 54.6 % at 380 nm. In-situ X-ray photoelectron spectroscopy and X-ray absorption fine structure spectroscopy demonstrated that Co and Os atoms coordinated with Te atoms enable an efficient Os―Te―Co electron transfer to activate the generation of *CH 3 , *CHOCO and *CH 2 OCOCO. Density functional theory calculations further confirmed Os―Te―Co electron bridging on the improved CO 2 conversion kinetics. To our knowledge, this is the first report suggesting the role of Os atoms in accelerating the photocatalytic CO 2 conversion activity of the topological semimetal 1 T-OsCoTe 2 .
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 16
·118672
·
IF 6.3
Xiaoyang Jiao,Anwei Xu,Changbai Long,Mingcong Qing,Fenglong Li,Kuntong Zhang,Lei Hu,Xiangdong Ding,Jun Sun
SiC whiskers (SiC w ) and Y 2 O 3 reinforced (Hf 0.5 Zr 0.5 )C ceramics are designed to realize superior oxidation and ablation resistance at 2500 °C. MoSi 2 , TaSi 2 , and SiB 6 (with varying SiC w contents) are further introduced as sintering aids and modifying components to enhance density and improve ablation resistance. The introduction of SiB 6 leads to higher oxidation and ablation resistance due to the in-situ formation of borides with high thermal conductivity. The borides and SiC jointly serve as rapid heat transfer pathways, facilitating the release and mitigation of thermal stresses during ablation. Meanwhile, an appropriate amount of SiC w serves as toughening and high-temperature self-healing phases, while Y 2 O 3 suppresses the crystalline transformation. Thus, a dense and stable oxide layer is developed during ablation. Therefore, the designed SiC w -Y 2 O 3 -SiB 6 -(Hf 0.5 Zr 0.5 )C exhibits near-zero damages under a 1050 s ablation at 2500 °C, with mass and linear ablation rates of −0.220 μm/s and −0.071 mg/(cm 2 ·s), respectively.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Electronic Materials
·
2026
·Vol. 8
·期 15
·6545-6553
·
IF 4.7
Liu Qianzuo,Sun Sifan,Li Jiawei,Yang Haoran,Xiang Xinyue,Hao Ying,Yan Xuehua,Zhang Ting,Li Tie
Hydrogen peroxide (H 2 O 2 ), a key reactive oxygen species in physiological and pathological processes, demands highly sensitive detection for biological and biomedical research, yet developing electrocatalytic materials with high sensitivity, low detection limit, and excellent stability remains a challenge. Herein, a Fe−C@Fe/Ce−C bilayer heterojunction composite was fabricated for H 2 O 2 detection. Benefiting from its unique heterojunction architecture and synergistic Fe/Ce/carbon interactions, the as-prepared nanocomposite exhibits the exceptional H 2 O 2 sensing performance, with a wide linear range of 0.5−6000 µM, a high sensitivity of 490.5 μA·mM −1 ·cm −2 , a low detection limit of 0.12 µM, excellent anti-interference selectivity against common biological interferents, and outstanding long-term stability with no obvious performance variation after 11 days of continuous testing. The robust built-in electric field arising from the heterojunction facilitates interfacial charge transfer and accelerates H 2 O 2 activation, boosting sensing behavior. Furthermore, the flexible electrochemical sensor was fabricated via the screen-printing technology, which enables reliable real-time monitoring of intracellular H 2 O 2 released from HeLa cells, showing great potential for biological sensing. This work provides a promising design strategy for high-performance flexible electrochemical sensors and deepens the understanding of heterojunction and built-in electric field roles in electrocatalytic sensing systems.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Ran Wang,Zhiding Zheng,Zhuo Li,Xiaoxiang Xu
Photocatalytic C-C coupling is a green and sustainable route to produce value-added chemicals. However, the product selectivity is generally non-tunable and there is a lack of an in-depth understanding of the dependence of product selectivity on the band structure of the semiconductor photocatalyst. Here, Zn x Cd 1-x S solid solutions have been explored for photocatalytic C-C coupling using benzyl alcohol as a typical reactant. The conversion rate of benzyl alcohol and selectivity of C-C coupling products is inherently linked to the solid solution level of Zn x Cd 1-x S which can be readily tuned. An optimal solid solution level has been found at Zn 0.6 Cd 0.4 S (x = 0.6) which delivers a conversion rate of 91.61% and a selectivity of 98.83% for C-C coupling products. These findings not only deepen the understanding on factors that affect product selectivity but also justify the usefulness of solid solutions in tuning the C-C coupling reactions.
✓ 已验证
产品关联
DOI
高影响因子
CHROMATOGRAPHIA
·
2022
·Vol. 85
·期 8
·743-754
·
IF 2.213
Lin Min,Li Xinxin,Zhang Hongfeng,Ji Wenquan,Shi Yuhan,Li Qinran,Zhang Chenxi,Deng Qiliang
Abstract The C-terminal epitope imprinted polymers on the silica were prepared by reversible addition-fragmentation chain transfer (RAFT) strategy with C-terminal nonapeptide of cytochrome c (Cyt c) as the template. 4-cyano-4-(phenylcarbonothioylthio) phetanoic acid was immobilized on the silica as a chain transfer agent to regulate the polymerization of the imprinted layer to enhance the recognition performance of the imprinted materials for the peptide and target protein. Additionally, zinc methacrylate was used as a functional monomer to form the imprinted sites through the synergistic effect of Zn 2+ chelating, hydrogen bonding and electrostatic attraction, which further improved the recognition between polymers and protein. The molecularly imprinted polymers prepared with RAFT strategy show good recognition for the epitope peptide and Cyt c with imprinting factors of 7.96 and 6.17, respectively, which is higher than those prepared without RAFT strategy. Furthermore, the imprinted polymers have a good binding capacity and imprinting factor for Cyt c in multi-proteins selective recognition and have good reusability. The performance of Cyt c recognition in bovine serum by the epitope imprinted polymers was calculated by HPLC and the results demonstrated the well selectivity and potential application for Cyt c recognition in biological sample. Graphical abstract
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Wenjie Li,Lifen Li,Qineng Xia,Song Hong,Lijun Wang,Zhibo Yao,Tai-Sing Wu,Yun-Liang Soo,Hao Zhang,Tsz Woon Benedict Lo,Alex W. Robertson,Qingya Liu,Leiduan Hao,Zhenyu Sun
Electrochemical CO 2 reduction (ECR) to commodity chemicals offers a promising way for mitigating the greenhouse effect and driving the transition from fossil-fuel dependence to a sustainable economy. To this end, the design and development of active and robust electrocatalysts is key. Here we report for the first time that incorporation of bismuth (Bi) single atoms on defective CuO could significantly enhance the ECR reaction to C 2 H 4 by decreasing C–C coupling barriers. The overpotential for C 2 H 4 production is lowered by at least 50 mV, along with a two-fold improvement in the faradaic efficiency, reaching 60% at 400 mA cm −2 . The high performance is maintained even after 20 h of consecutive electrolysis. Control experiments along with density functional theory calculations suggest that the joint incorporation of Bi and oxygen vacancies greatly promotes CO 2 adsorption and lowers C–C coupling energy barriers, thereby improving the C 2 H 4 selectivity.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Gui Li,Jianjie Hao,Jiayan Li,Pengyu Dai,Bo Wang,Yuanqi Li,Yi Tan,Xueqiang Cao
This work firstly evaluated the effect of temperature on the preparation of SiC coating using Al 2 O 3 as catalyst by pack cementation (PC) method. SiC/ZrB 2 -SiC-Si (ZSS) and SiC/ZrB 2 -SiC-Al 2 O 3 (ZSA) coating were prepared on the surface of C/C composites by PC combined with atmospheric plasma spraying (APS). The objective of this work is to study the influence of Si and Al 2 O 3 additives for ablation performances of ZrB 2 -SiC coating. The coated samples were subjected to ablation test, and the phase composition and microstructure evolution were investigated. The results indicated that SiC/ZSA coating had better ablation resistance because phase transformation and growth of ZrO 2 grain was restrained by Al 2 O 3 .
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 14
·9307-9318
·
IF 12.732
Tianle Zheng,Jianwei Xiong,Bingying Zhu,Xiaotang Shi,Ya-Jun Cheng,Hongbin Zhao,Yonggao Xia
Lithium secondary batteries (LSBs) have witnessed explosive growth in the last decade. A wide operating temperature window is crucial for practical applications. A new concept is developed to expand the temperature window between −20 °C and 150 °C, where a competitive decomposition process between the electrolyte and solvent is manipulated with adiponitrile (ADN) over a wide temperature range. The decomposition of ethylene carbonate (EC) solvent and anions of lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and lithium oxalyldifluoroborate (LiODFB) is regulated with ADN via a temperature-dependent lithium solvation mechanism. As a result, a SEI layer with a rich inorganic component is formed at elevated temperatures, leading to improved performance in lithium titanate (LTO)/Li, lithium iron phosphate (LFP)/Li, and LiNi0.5Co0.2Mn0.3O2 (NCM523)/Li batteries over a wide temperature range. It enables a coulombic efficiency (CE) of 97.39% at 100 °C and more than 100 hours of cycling of Li/Li batteries at 150 °C, as well as stable cycling of LFP/Li batteries in the temperature range between 120 °C and −20 °C. Stable cycling performance is demonstrated with the LTO/Li batteries over a wider temperature range from −40 °C to 150 °C. High-temperature electrochemical stability is exhibited at 5C, with a capacity retention ratio of 87.94% at 120 °C and 99.93% at 100 °C after 1000 cycles.
✓ 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）