ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2022
·
IF 11.357
Zhilin Zhang,Guangzhi He,Yaobin Li,Changbin Zhang,Jinzhu Ma,Hong He
Pt/Al2O3 catalysts showing excellent activity and stability have been used in various reactions, including HCHO oxidation. Herein, we prepared Pt–Na/Al2O3 catalysts with a Pt content of 0.05 wt % to reveal the key factors determining the anchoring of Pt as well as the catalytic activity and mechanism of HCHO oxidation. Pt–Na/nano-Al2O3 (denoted as Pt–Na/nAl2O3) catalysts with 0.05 wt % Pt content could completely oxidize HCHO to CO2 at room temperature, which is the lowest Pt content used in HCHO catalytic oxidation to our knowledge. After Na addition, terminal hydroxyl groups (denoted as HO-μter) on nano-Al2O3 were transformed to doubly bridging hydroxyl groups between Na and Al (denoted as HO-μbri(Na–Al)), which atomically dispersed Pt species. Pt anchoring further promoted the regeneration of HO-μbri(Na–Al) by activating O2 and H2O, oxidizing HCHO to CO2 directly by the fast reaction step ([HCOO–] + [OH]a → CO2 + H2O). Our study revealed that the HO-μbri(Na–Al) synergistically generated by HO-μter and Na species provided anchoring sites for Pt species.
研究领域:
催化化学
·
环境科学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Zhenchao Gu,Yu Sun,Li Zhang,Mengyang Lv,Lirong Chen
Carboxylated dyes are regarded as the most effective sensitizers for TiO 2 owing to their propensity to establish more stable ester bonds with the TiO 2 surface. Despite this advantage, the prevailing sensitization protocols lack well-defined guidelines, leading to suboptimal photocatalytic performance. As typical carboxylated dyes, tetracarboxyphenyl porphyrin and tetracarboxyzinc phthalocyanine were synthesized and anchored on TiO 2 under different conditions to investigate the regularities in the sensitization conditions of carboxylated dye-sensitized TiO 2 . Significant differences in the morphology of these catalysts can be observed under different sensitization conditions. Solvents with high dye solubility, low viscosity, and high polarity are deemed more suitable for the dye-sensitized systems. The dye ratio and the duration dictate the amount of anchored dye. Agglomeration of dyes caused by high temperatures or excess dye may seriously damage the performance of the photocatalysts. In summary, among commonly used solvents such as dichloromethane, methanol, ethanol, and DMF, DMF was identified as the optimal solvent for sensitizing TiO 2 with carboxylated dyes. A dye dosage of 1 × 10 -5 mol per gram of TiO 2 was found to be sufficient to achieve uniform surface coverage without causing multilayer adsorption or aggregation. Finally, this study investigated the mechanism of how dye sensitization conditions influence the process, and the principles for selecting sensitization conditions in the future were summarized.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 10
·6131-6138
·
IF 12.732
Zhiqiang Luo,Silin Zheng,Shuo Zhao,Xin Jiao,Zongshuai Gong,Fengshi Cai,Yueqin Duan,Fujun Li,Zhihao Yuan
Benzoquinone (BQ) is a desirable cathode for aqueous rechargeable batteries because of its high theoretical capacity and low cost. However, its application is seriously hindered by the high solubility of its discharge product in electrolytes, leading to rapid capacity decay. Here, we report a highly pyridine- and pyrrole-N-doped carbon cloth (NCC) with hierarchical pores as a promising host to anchor BQ and its discharge products. The resultant cathode (BQ-NCC) exhibits an ultrahigh initial capacity of 489 mA h gBQ−1 (excluding the capacity contribution of NCC) at 0.1 A g−1 and a long cycle life with a high capacity retention of 90.4% at 0.5 A g−1 after 500 cycles. Furthermore, a pouch-type cell with a capacity of ∼0.23 A h delivers an energy density of 136.1 W h kg−1 based on the total mass of BQ-NCC and Zn foil. Our study provides a novel strategy to construct high-performance aqueous Zn-ion batteries for potential practical applications.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jing Liu,Yuhao Zhou,Zhenxue Xiao,Mengyuan Xue,Sheng Liu,Tianying Yan
Lithium–sulfur (Li–S) batteries, with promising potential for high energy density, remain compelling candidates for next-generation energy storage systems. However, they still suffer from huge challenges such as severe shuttle effects and sluggish redox kinetics. A strategic approach involves the meticulous design of host materials at the molecular level, emphasizing the construction of efficient sulfiphilic organic molecules as anchoring sites for lithium polysulfides (LiPS). In this study, a series of benzamides (benzamide, 2-fluorobenzamide, and 2,6-difluorobenzamide) are introduced onto carboxylic multiwalled carbon nanotubes (C-CNT) to graft sulfur hosting materials with tailored functional interfaces for Li–S batteries. Through a comparative study, we identify the semi-ionic C−F bond and carbonyl functional group as active centers, presenting a synergistic strategy via Li···O and Li···F bonds for anchoring LiPS. The optimized cathode material of sulfur-based carbon nanotubes grafted with 2-fluorobenzamide exhibits outstanding electrochemical activity, achieving a high reversible capacity of 944.8 mAh/g under a high sulfur loading (5.5 mg cm −2 ) and low electrolyte usage (8 µL mg −1 ). Our study underscores the potential of tailoring the molecular structure of host materials to effectively immobilize LiPS for high-performance Li–S batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SURFACE REVIEW AND LETTERS
·
2018
·
IF 0.734
MAO ZHOU,XIAOCAI LIANG,YUQING MIAO
The preparation of ultrathin Ni layer onto the surface of glassy carbon electrode (GCE) by molecule anchoring method was studied in this paper in which two steps were involved: molecule anchoring (GCE-M) and ultrathin Ni layer adsorption (GCE-M-Ni). The result showed that by simply anchoring some molecules (purpald, bismuthiol I, DPTA, EDTA-2Na, ferrotitanium and thiourea) onto the surface of GCE, the adsorption of Ni layer would be improved relatively, thus improving the electrocatalytic ability of GCE toward sucrose, fructose and glucose. It was believed that the anchoring of these molecules helped the following adsorption of Ni layer. Good electrocatalytic characteristics for sugars oxidation of GCE-purpald-Ni were observed in this work with the immediate response, wide linear range from 0 μ M to 800 μ M and low detection limit down to 0.49 μ M for the sensing of total sugar (TS) concentration. The common interfering molecule such as ascorbic acid was proved of no interfering effect on the detection. Also, GCE-purpald-Ni was successfully applied to detect TS concentration in orange juice samples with high recovery rate of more than 85%. It is concluded that the molecule anchoring method can be used to the adsorption of ultrathin Ni layer onto the surface of GCE and works as one of the promising nonenzymatic sensings toward sugars.
研究领域:
分析化学
·
电化学
·
生物传感
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 20
·11119-11126
·
IF 2.936
Faqin Tong,Shuangshuang Chen,Zhao Chen,Xuemin Lu,Qinghua Lu
Enhancing the azimuthal anchoring energy of the aligning film is a key requirement to improve the quality of liquid-crystal displays. Based on the assumption of mesogenic side groups being able to align liquid-crystal (LC) molecules, we have designed a novel transparent polyimide bearing cyanobiphenyl mesogenic side chains, which has a similar structure to that of liquid crystal 5CB. A pyrimidyl diamine monomer with a cyanobiphenyl mesogenic unit was first synthesized, and then co-polymerized with 4,4′-diaminodiphenyl ether and 4,4′-oxydiphthalic anhydride. The obtained polyimide (PI) exhibited good thermal stability and mechanical properties, as well as high optical transparency with transmittance of up to 86% in the wavelength range 450–700 nm. By evaluating the adhesion force between PI films and LCs with a super-sensitive microelectro-mechanical balance system, we have verified that appending mesogenic groups on the side chains of PI strengthens intermolecular interactions between the LC and PI surfaces, thereby enhancing the surface anchoring energy. Compared with the unmodified PI, the anchoring energy of the derivatized PI was improved more than 2.2-fold. By virtue of its good transparency and strong anchoring energy, this PI would seem to be an ideal candidate as a LC alignment film, and the concept of mesogens aligning LCs may open a new door in the design of LC alignment films.
研究领域:
材料科学
·
显示技术
✓ 已验证
DOI
PubMed
高影响因子
PHYSICS OF FLUIDS
·
2024
·Vol. 36
·期 6
·
IF 4.1
Li Gu-Yuan,Yu Jia-Jia,Duan Cheng-Cheng,Sun Shouli,Wu Chun-Mei,Li You-Rong
In this work, efficient microfluidic flow rate tuning based on the asymmetric flow of nematic liquid crystal 5CB under a horizontal temperature gradient is studied. Rectangular microchannels with the width of 100 μ m are fabricated through soft lithography and treated with homeotropic surface anchoring conditions. Polarized optical microscopy is applied to explore the unique optical anisotropic characteristics of the nematic liquid crystal. The asymmetric velocity profiles in the microchannel are obtained by particle tracking velocimetry. The effects of temperature, flow rate, and aspect ratio on the velocity profile and split ratio of the asymmetric flow are quantitatively studied for the first time, while the mechanism of the flow asymmetry of the nematic liquid crystal is discussed. The results show that the asymmetric flow of the nematic liquid crystal occurs after the horizontal temperature gradient is applied, with the velocity in the heated region markedly higher than its counterpart. The split ratio of the asymmetric flow increases with the increase in the temperature gradient and the decrease in the flow rate. The aspect ratio influences the asymmetric flow through approaches of average velocity and surface anchoring strength, while the former is more distinct. The impacts of temperature gradient, flow rate, and aspect ratio on the flow asymmetry of nematic liquid crystals are caused by the coupling between physical properties, velocity field, and director field. Microchannels based on the asymmetric flow characteristics of nematic liquid crystals can act as a novel kind of temperature-controlled microvalve to achieve efficient microfluidic flow tuning.
研究领域:
物理学
·
微流控技术
·
材料科学
✓ 已验证
DOI
高影响因子
Materials Horizons
·
2024
·
IF 12.2
Shuo Ding,Zhuoyuan Kong,Yipeng Shen,Piaoyang Shen,Chunyan Wu,Lei Qian,Xinyu Zhang,Long Hu,Hao Chen,Chaoyu Xiang
A novel ion anchoring strategy stabilizes perovskite phase, yielding ambient stable perovskite films and ultra-stable perovskite light-emitting diodes (PeLEDs) with an unprecedented operational half-lifetime over 37.2 years at 100 cd/m² and exceeding 27% efficiency, marking a new stability benchmark for next-generation display and lighting applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Shuaitao Qin,Zhongjie Cui,Zhuoqi Wen,Dan Yang,Haiyang He,Jinchan Zhao,Mingliang Zhang,Shiliang Mei,Wanlu Zhang,Ruiqian Guo
Colloidal indium phosphide (InP) quantum dots (QDs) have attracted worldwide attention due to their intrinsic environmental friendliness and excellent optical properties. The incorporation of metal ions has been a common way to modify the properties of InP QDs and some metal ions have been confirmed to be effective in preparation of blue-emitting InP QDs. Herein, the interfacial anchoring effect of rare earth metal ions neodymium(III) (Nd 3+ ) is unveiled for the first time by analyzing the alteration of spectra, size, and composition of QDs after Nd doping. It is evidenced that Nd substitutes for In of InP during the process of nucleation. More crucially, Nd is anchored at the surface of InP and inhibits their further growth at the high temperature of shelling. This ensures that the size of InP QDs and the absorption peak position are almost maintained during shell growth. It is demonstrated that the emitting wavelength of InP/ZnS core/shell QDs is systematically tunable through varying Nd amounts. Finally, the optimized InP/ZnS QDs exhibiting an emission peak of 470 nm with a photoluminescence quantum yield of 44%, and a full width at half-maximum of 46 nm are prepared.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2024
·
IF 20.2
Chunxue Wang,Zhao Li,Xin Sun,Yuan Li,Lei Shi,Shunzheng Zhao,Kai Li,Ping Ning,Fei Wang
Ag-based catalysts show high activity in NH 3 -selective catalytic oxidation (NH 3 -SCO). The anchoring states of Ag species determines its valence and dispersion, thereby influencing the performance of Ag-based catalysts. Herein, we elucidated that the content and anchoring strength of the hydroxyl (OH) groups on support together affect the anchoring states of Ag. TiO 2 has few OH groups but high anchoring strength, the anchored Ag is in a highly dispersed oxidized state, while the unanchored Ag is aggregated in a metallic state (Ag 0 ), so it presents an unevenly sized dispersion and mainly in oxidized state. SiO 2 has abundant OH groups but weak anchoring, and can excessively agglomerate into large Ag 0 nanoparticles (Ag 0 NPs). Therefore, the introduction of SiO 2 can regulate the anchoring states of Ag on the TiO 2 support, making Ag presents highly dispersed Ag 0 NPs, thus following a reaction mechanism with lower energy barriers and significantly improving the NH 3 -SCO performance.
研究领域:
催化化学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Xunlong Cheng,Xuran Ding,Jun Wang,Shuai Wang,Hong Zhong,Junhui Wang,Changzheng Wang,Zhanfang Cao,Xin Ma
To address the challenge of difficult flotation separation between spodumene and aluminosilicate minerals, this work synthesized a long-chain carboxylic acid surfactant featuring amide groups, N-Oleoylglycine, as a high-performance collector. Experimental results demonstrate that N-Oleoylglycine exhibits significantly improved collecting power for spodumene compared to conventional sodium oleate, along with superior selectivity in distinguishing spodumene from feldspar. Under optimized conditions (5 × 10 −4 mol/L concentration, pH 7.0), N-Oleoylglycine achieved 89.39 % flotation recovery for spodumene, contrasted with merely 9.78 % for feldspar, highlighting its exceptional separation efficacy. Nuclear magnetic resonance (NMR) analyses reveal that the deprotonated amide nitrogen coordinated with Al 3+ ions on spodumene surfaces. Density functional theory (DFT) calculations further identify the amide and carboxyl groups as the primary functional groups responsible for its collector properties. DFT calculations also predict that in the adsorption configuration of N-Oleoylglycine with Al ions, the Al ions form complexes with the N atom of the amide group and two carbonyl oxygen atoms, respectively Multiple characterization techniques — including contact angle measurements, FTIR spectroscopy, and XPS analysis — collectively substantiated that N-Oleoylglycine achieves selective adsorption on spodumene through synergistic interactions between its amide and carboxyl moieties. Notably, the self-assembly capability of amide groups through intermolecular hydrogen bonds enables ordered collector molecular arrangement on mineral surfaces, suggesting potential for advancing mineral separation technologies.
研究领域:
矿物加工工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENZYME AND MICROBIAL TECHNOLOGY
·
2024
·
IF 3.4
Yidi Liu,Zhanzhi Liu,Xuehong Guo,Ke Tong,Yueheng Niu,Zhiyu Shen,Hanzhi Weng,Fengshan Zhang,Jing Wu
The substantial accumulation of polyethylene terephthalate (PET) plastic waste in the environment has exacerbated the issue of plastic pollution. The biodegradation of PET plastics using biological enzymes has garnered considerable attention due to its efficiency and environmentally friendly nature. Nevertheless, the low binding affinity of PET plastics presents a significant limitation to the application of biocatalysts in their degradation. This study endeavors to engineer a fusion protein comprising the anchor peptide LCI, derived from Bacillus subtilis A014, and a thermally stabilized variant of Thermobifida fusca cutinase, D204C/E253C (Tfuc2), with the objective of augmenting its polyethylene terephthalate (PET) degradation efficacy. The findings demonstrate that LCI exhibits a high binding affinity for PET, and the hydrolytic efficiency of the LCI-containing fusion protein is enhanced by a factor of 1.8–34.5 compared to the free Tfuc2 enzyme. The enzymatic characteristics and molecular dynamics simulation outcomes indicate that the improved hydrolytic efficiency of PET may originate from the flexible oscillatory behavior of LCI, which exhibits a high binding affinity for PET. This study presents a novel methodology for the enzymatic degradation of PET plastic waste.
研究领域:
环境科学
·
生物化学
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）