SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Chao Du,Yunfei Ge,Junyi Qian,Zhijie Zhang
Solar-driven CO 2 conversion into reusable carbon forms is an attractive strategy to. reduce CO 2 emissions and provide feedstocks for industrial production. However, most of present catalysts suffer from poor light utilization and rapid charge recombination, thus severely restricting the efficiency of CO 2 photoreduction. Herein, an innovative strategy of integrating Cs 3 Bi 2 Br 9 and MnO 2 via self-assembly was established, with the aim of designing a multimodal photothermal catalyst for CO 2 reduction under full spectrum. In this hybrid, MnO 2 could combine with CBB to create an S-scheme photocatalyst with promoted carrier separation, and simultaneously acted as a “heater” to facilitate CO 2 photoreduction by effective photothermal conversion. Upon UV–vis-NIR illumination, the CBB/MnO 2 hybrid presented an impressively high CO production rate (R CO = 189.75μmol g −1 h −1 ). Theoretical calculations combined with experimental tests indicated that the excellent catalytic activity of CBB/MnO 2 could be ascribed to the synergetic effect of greatly increased carrier transfer and high photothermal conversion efficiency, resulting in considerably enhanced solar-light-driven photothermocatalysis with no extra heat input. The as-proposed catalyst in this study provides a novel and effective approach to develop highly efficient photothermal catalysts for solar-to-fuel applications.
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产品关联
DOI
高影响因子
JOURNAL OF LIPID RESEARCH
·
2020
·Vol. 61
·期 4
·580-586
·
IF 4.483
Teng-Fei Yuan (袁;腾;飞,Juan Le (乐;娟,Shao-Ting Wang (王;少;亭,Yan Li (李;艳
Analyzing global steroid metabolism in humans can shed light on the etiologies of steroid-related diseases. However, existing methods require large amounts of serum and lack the evaluation of accuracy. Here, we developed an LC/MS/MS method for the simultaneous quantification of 12 steroid hormones: testosterone, pregnenolone, progesterone, androstenedione, corticosterone, 11-deoxycortisol, cortisol, 17-hydroxypregnenolone, 17-hydroxyprogesterone, dehydroepiandrosterone, estriol, and estradiol. Steroids and spiked internal standards in 100 μl serum were extracted by protein precipitation and liquid-liquid extraction. The organic phase was dried by evaporation, and isonicotinoyl chloride was added for steroid derivatization, followed by evaporation under nitrogen and redissolution in 50% methanol. Chromatographic separation was performed on a reverse-phase PFP column, and analytes were detected on a triple quadrupole mass spectrometer with ESI. The lower limits of quantification ranged from 0.005 ng/ml for estradiol to 1 ng/ml for cortisol. Apparent recoveries of steroids at high, medium, and low concentrations in quality control samples were between 86.4% and 115.0%. There were limited biases (−10.7% to 10.5%) between the measured values and the authentic values, indicating that the method has excellent reliability. An analysis of the steroid metabolome in pregnant women highlighted the applicability of the method in clinical serum samples. We conclude that the LC/MS/MS method reported here enables steroid metabolome analysis with high accuracy and reduced serum consumption, indicating that it may be a useful tool in both clinical and scientific laboratory research.
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DOI
PubMed
高影响因子
ENZYME AND MICROBIAL TECHNOLOGY
·
2012
·
IF 2.367
Jing-Yun Wang,Cui-Li Ma,Yong-Ming Bao,Pin-San Xu
Lipase from Burkholderia cepacia was encapsulated inside zirconia particles by biomimetic mineralization of K 2 ZrF 6 induced with protamine, a natural cationic protein. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and Fourier transform infrared spectroscopy (FT-IR) were employed for the characterization of the novel immobilized lipase. SEM and TEM images showed that both the zirconia particles with and without lipase have good spherical structures with average particle sizes of 150 nm. Fluorescence microscopy demonstrated that the lipase was indeed encapsulated inside the zirconia particles. The maximum immobilization capacity of the zirconia particles was 0.15 units/mg under optimum immobilization conditions. Biochemical characterization showed that the encapsulated lipase could retain most of its initial activity. Compared with free lipase, the encapsulated lipase exhibited improved thermal, pH, and recycling stabilities. After 8 weeks of storage, no substantial loss in catalytic activity was observed for the encapsulated lipase. The conversion of the kinetic resolution of ( R,S )-1-phenylethanol with vinyl acetate as acetyl donor catalyzed by zirconia-immobilized lipase reached 49.9% with higher ee s of 99.9% under the following optimal conditions: octane as solvent, 0.1 M ( R,S )-1-phenylethanol, 70 mg immobilized lipase, 180 rpm, 50 °C for 48 h. After 6 cycles (288 h), the conversion and ee s were still 43% and 85%, respectively.
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DOI
PubMed
高影响因子
FUEL
·
2024
·
IF 6.7
Youbin Zheng,Ze Li,Hao Guo,Cunyin Liu,Yuefeng Chen,Xiumei Han,Liang Dong,Jianbing Zang
Hydrogen evolution reaction (HER) is considered as an effective pathway for hydrogen production. Herein, to obtain efficient HER catalyst, density functional theory is employed to figure out the optimal candidate for nickel sulfide. Guided by the mechanistic screening, the highly active HER electrocatalyst, Co-substituted Ni 3 S 4 , is synthesized by one-step hydrothermal method, resembling a vesicle composed of a broken spherical membrane and encapsulated clusters of nanospheres. Cracks on membrane provide a rational entry for reactant molecules to be enclosed in the vesicle. Additionally, the enhanced intrinsic activity also attributes to the upward shift of the d-band center. From the reaction energy diagrams, the decomposition of H 2 O* is confirmed as the rate-determining step (RDS) and the energy required for the RDS is efficiently lowered by the elevated d-band center, which made the catalyst achieves 185 mV overpotential at 100 mA·cm −2 and 38 mV at 20 mA·cm −2 lower than utmost Co-Ni-S relative electrocatalyst.
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DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Bin Xu,Chuanhe Ma,Xiaoshuang Lu,Yulin Liu,Qiao Zhang,Ye Chen,Pingxiong Yang,Junhao Chu,Lin Sun
Cu 2 ZnSn(S,Se) 4 (CZTSSe) has received considerable attention as the promising absorber for thin-film solar cells. For traditional selenization process, the issues of Sn-loss, lower S/(S + Se) ratio, and unsuitable back contact interface extensively exist in CZTSSe solar cells. In present work, SnSe and SnS powder is introduced during selenization process, respectively. The effects of SnSe and SnS powder on CZTSSe films and the Mo/CZTSSe interface have been comprehensively studied. We discover that SnS not only can provide the Sn-contained vapor in selenization process but also offer S-vapor. Due to the presence of Sn-contained vapor, the number of voids in the CZTSSe absorber and Mo/CZTSSe interface decreases remarkably and the Sn-loss is effectively suppressed. The thickness of Mo(S,Se) 2 layer is significantly reduced, and the S/(S + Se) ratio in CZTSSe bulk obviously increases owing to the presence of S-vapor. As a consequence, the open-circuit voltage and fill factor of the solar cell significantly increase and the CZTSSe solar cell with efficiency of 10.07% (total area) is successfully fabricated.
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DOI
高影响因子
JOURNAL OF APPLIED ELECTROCHEMISTRY
·
2024
·
IF 2.4
Li Jingzhe,Zhang Jiaxin,Ling Yikai,Long Min,Tian Rui,Liang Ti,Nong Guangzai
Pt counter electrodes are essential components of dye-sensitized solar cells (DSSCs). However, their high cost and poor stability limit the development of these cells. In the quest for alternative materials to replace Pt, this study utilized sodium lignosulfonate as the primary raw material and successfully prepared N, S co-doped hierarchical porous carbon by adjusting the ratio of thiourea. This carbon was then fabricated into a counter electrode to replace Pt. The results showed that the N, S co-doped hierarchical porous carbon exhibited superior electrochemical performance compared to single-atom doped carbon. When used as the counter electrode in DSSCs, it achieved a power conversion efficiency of 8.62%, which is higher than the 7.98% efficiency of Pt. Furthermore, it demonstrated greater stability than Pt in stability tests. These findings confirm that N, S co-doped hierarchical porous carbon could replace Pt, thereby advancing the scientific understanding of DSSCs and promoting their application and development. Graphical Abstract
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2016
·Vol. 26
·期 40
·7224-7233
·
IF 11.382
Sheng Cao,Jinju Zheng,Jialong Zhao,Zuobao Yang,Minghui Shang,Chengming Li,Weiyou Yang,Xiaosheng Fang
Dual emission quantum dots (QDs) have attracted considerable interest as a novel phosphor for constructing ratiometric optical thermometry because of its self-referencing capability. In this work, the exploration of codoped Zn–In–S QDs with dual emissions at ≈512 and ≈612 nm from intrinsic Cu and Mn dopants for ratiometric temperature sensing is reported. It is found that the dopant emissions can be tailored by adjusting the Mn-to-Cu concentration ratios, enabling the dual emissions in a tunable manner. The energy difference between the conduction band of the host and Cu dopant states is considered as the key for the occurrence of Mn ion emission. The as-constructed QD ratiometric temperature sensor exhibits a totally robust stability with a fluctuation of ≈ I Cu / I tot versus times lower than 1% and almost no hysteresis in cycles over a broad window of 100–320 K. This discovery represents that the present cadmium-free, intrinsic dual-emitting codoped QDs can open a new door for the synthesis of novel QDs with stable dual emissions, which poise them well for challenging applications in optical nanothermometry.
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DOI
高影响因子
Small
·
2022
·Vol. 18
·期 31
·2202544
·
IF 15.153
Yichao Wang,Meijie Liu,Chunxu Wu,Jiapeng Gao,Min Li,Zipeng Xing,Zhenzi Li,Wei Zhou
Major issues in photocatalysis include improving charge carrier separation efficiency at the interface of semiconductor photocatalysts and rationally developing efficient hierarchical heterostructures. Surface continuous growth deposition is used to make hollow Cu 2-x S nanoboxes, and then simple hydrothermal reaction is used to make core-shell Cu 2-x S@ZnIn 2 S 4 S-scheme heterojunctions. The photothermal and photocatalytic performance of Cu 2-x S@ZnIn 2 S 4 is improved. In an experimental hydrogen production test, the Cu 2-x S@ZnIn 2 S 4 photocatalyst produces 4653.43 µmol h −1 g −1 of hydrogen, which is 137.6 and 13.8 times higher than pure Cu 2-x S and ZnIn 2 S 4 , respectively. Furthermore, the photocatalyst exhibits a high tetracycline degradation efficiency in the water of up to 98.8%. For photocatalytic reactions, the hollow core-shell configuration gives a large specific surface area and more reactive sites. The photocatalytic response range is broadened, infrared light absorption enhanced, the photothermal effect is outstanding, and the photocatalytic process is promoted. Meanwhile, characterizations, degradation studies, active species trapping investigations, energy band structure analysis, and theoretical calculations all reveal that the S-scheme heterojunction can efficiently increase photogenerated carrier separation. This research opens up new possibilities for future S-scheme heterojunction catalyst design and development.
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DOI
高影响因子
ChemElectroChem
·
2019
·Vol. 7
·期 4
·914-921
·
IF 3.975
Weiyuan Guo,Kang Ding,Shixiong Mei,Xingxing Li,Xiaoyu Feng,Siguang Guo,Jijiang Fu,Xuming Zhang,Biao Gao,Kaifu Huo,Paul K. Chu
Graphical Two for the price of one : Hollow spheres consisting of in situ generated SnS nanosheets (SnS@C HSs) conformally coated with S-doped carbon are fabricated using polystyrene spheres as the self-sacrifice template and carbon source. Thanks to the unique structure, the SnS@C HSs exhibit excellent performance for both lithium- and sodium-ion batteries. Although tin sulfide is a promising anode material for lithium- and sodium-ion batteries due to the layered structure and high theoretical capacity, the large volume expansion and poor kinetics have seriously hindered further development and application. In this work, hollow spheres consisting of in situ generated SnS nanosheets (SnS@C HSs) conformally coated with S-doped carbon are fabricated using polystyrene spheres as the self-sacrifice template and carbon source. The SnS@C HSs with a large SnS interlayer distance, S-doped carbon matrix, and hollow structure not only relieve the pressure caused by volume expansion during cycling, but also promote fast transfer of lithium/sodium ions leading to a high pseudocapacitance. The SnS@C HSs have excellent electrochemical properties in both LIBs and SIBs such as high capacity, high rate, and outstanding cycling stability. The use of a self-sacrifice template is demonstrated to be a convenient and efficient strategy to design and prepare carbon-coated metal hollow spheres for efficient energy storage and conversion.
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DOI
高影响因子
Polymer Chemistry
·
2018
·Vol. 9
·期 13
·1674-1683
·
IF 4.927
Liguo Xu,Fan Zhou,Min Liao,Rongrong Hu,Ben Zhong Tang
The development of a new polymerization methodology affords polymer materials with new structures and functionalities. Multicomponent polymerizations (MCPs) as a facile tool for preparing multifunctional polymers with complicated structures have attracted increasing attention from polymer scientists, owing to their high efficiency, high atom economy, simple procedure, structural diversity, and environmental benefit. In this work, a series of efficient one-pot multicomponent polymerizations of diynes, disulfonyl azides, and N-protected isatins are developed to afford oxindole-containing poly(N-acylsulfonamide)s with advanced properties. After optimization of the polymerization conditions, the MCP can proceed smoothly at room temperature or 30 °C in dichloromethane/t-BuOH with CuI as the catalyst and LiOH as the base, generating poly(N-acylsulfonamide)s with high molecular weights of up to 30 600 g mol−1 in excellent yields of up to 98%. This MCP enjoys general applicability of a series of electron-rich or electron-deficient alkynes and alkyl group or aromatic group-substituted isatins, generating six poly(N-acylsulfonamide)s from different combination of monomers, and nitrogen gas as the only byproduct, demonstrating high atom economy and environmental benefit. The obtained poly(N-acylsulfonamide)s can be dissolved in alcohol or alcohol/water mixtures, but cannot be dissolved in THF or dichloromethane, which show opposite solubility after the polymers are acidified with HCl, indicating reversibly tunable hydrophilicity of the polymers. Furthermore, water can participate in the MCP as the fourth component when the MCP is conducted in DMF with CuI as the catalyst and Na2CO3 as the base, generating random copolymers consisting of 3-alkenyloxindole moieties and two chiral center-containing 3-hydroxyindole moieties in the backbone. Some of the oxindole-containing poly(N-acylsulfonamide)s exhibit yellow to red emission in their solid state. These MCPs provide an efficient approach for the synthesis of functional polymers with unique structures, which directly build the oxindole and N-acylsulfonamide moieties in situ, demonstrating high synthetic efficiency.
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Zihan Yang,Jingkai Yang,Lixia Li,Wanning Cao,Jiao Zhang,Hongli Zhao,Liqin Wang
The challenge of creating effective S-scheme visible-light photocatalysts persists due to the inactive visible-light-driven component and the low band-gap characteristics of semiconductors. In this work, we developed a novel F-BiVO 4 /g-C 3 N 4 /CdS dual S-scheme photocatalyst using a sonochemical method. The removal efficiency of Cr(VI) and ciprofloxacin (CIP) can reach 98 % and 90 % in 5 min and 30 min, respectively, under simulated solar illumination. The excellent photocatalytic activity can be attributed to the efficient carrier separation and transport with the help of internal electric field at the interface. This work also reveals the reduction process of Cr(VI), as well as the intermediates and pathways involved in the CIP degradation, taking into account practical situations and expanding its potential applications. This research presents promising prospects for the design of bismuth-based dual S-scheme heterojunctions in the field of environmental remediation.
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高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Hua Zhou,Liangdong Ye,Shanrong Li,Ziwei Li,Zhouqiao Wei,Zhiyi Huang,Shaorong Lu,Dongming Chen,Zuocai Zhang,Yuqi Li
Compatibilizers allow for the combination of two materials with vastly different polarities. The dosage of most compatibilizers must be more than 5 wt% to be effective—an expensive high dosage level that changes polymer composite properties. Thus, in this study, renewable resource epoxidized soybean oil (ESO) was used as the raw material to synthesize the end-hydroxyl group bio-based compatibilizer ESO-g-S-HPG. The experimental results revealed that composites prepared with ESO-g-S-HPG had better mechanical properties (i.e., tensile strength , impact strength , and energy storage modulus) than those prepared with a commercially available compatibilizer (TA 1618). The addition of 1 wt% of ESO-g-S-HPG significantly enhanced the interfacial compatibility between the HDPE and CaCO 3 , making it a good candidate for application in the field of HDPE composite filling and reinforcement, as evidenced by the minimal voids revealed by the scanning electron microscopy results. The molecular dynamics simulation results revealed that hyperbranched compatibilizers can eliminate filler aggregation and enhanced filler-matrix interaction, yielding effects that are better than those of linear compatibilizers. The compatibilizer proposed here can be a useful material for the fabrication of the next generation of composites applied in diverse industrial fields.
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高影响因子
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