APPLIED CATALYSIS B-ENVIRONMENTAL
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2023
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IF 22.1
Jun Wu,Ye Wang,Song Zhang,Yuxiang Liu,Feng Wang
Photocatalytic conversion of benzyl alcohol (BA) into value-added fine chemicals and hydrogen (H 2 ) in water medium provides a novel strategy for green synthesis. The construction of Z-scheme heterostructures not only realize enhanced charge-separation efficiency, but also remain strong drive force for photocatalytic reaction, which exhibit great potentials toward simultaneously generating benzaldehyde (BAD) and H 2 . Herein, we report a noble-metal-free Z-scheme photocatalytic system consisting poly(dibenzothiophene-S,S-dioxide) (PSO) and α-Fe 2 O 3 for selective oxidation of BA with synchronous H 2 production. Such nanocomposites can effectively transfer and reduce the recombination of photoexcited charge carriers, therefore maintaining the oxidizability of holes of α-Fe 2 O 3 and the reducibility of electrons of PSO. As expected, PSO-Fe 2 O 3 with a mass of ∼5 mg under optimal composition ratio exhibited an impressive photocatalytic activity with BAD and H 2 yields up to 23.1 and 29.5 μmol h −1 , respectively, which is among the top photocatalytic performance reported so far for selective photocatalytic oxidation of BA in the aqueous solution.
研究领域:
材料科学
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化学工程
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环境科学
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催化
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
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IF 8.128
Zhiliang Jin,Teng Li,Kai Wang,Xin Guo
Simple high-temperature calcination and hydrothermal methods were followed to synthesize CeO 2 and Mo-S, respectively. The efficient photocatalytic hydrogen evolution activity exhibited by the composite catalysts can be attributed to the edge active sites in Mo-S. The Mo-O bonds formed between CeO 2 and Mo-S could further accelerate the processes of separation and migration of electrons between the catalyst interfaces. The hybrid catalyst 10%-CeO 2 /Mo-S exhibiting the best hydrogen generation ability (4.3 mmol h −1 g −1 ) was obtained by optimizing the content of CeO 2 in CeO 2 /Mo-S. Analysis of the PL spectral profile and photocurrent response recorded for the system revealed that 10%-COMS exhibited excellent photogenerated carrier separation ability. Analysis of the LSV and EIS curves revealed that 10%-COMS exhibited the optimal hydrogen production potential. The charge migration resistance provided by the systems was lower than the charge migration resistance provided by CeO 2 and Mo-S. The synergism between the S-scheme heterojunctions and the Mo-O bonds helped accelerate the separation and migration of photo-induced carriers at the catalyst interfaces. The introduction of covalent bonds in the S-scheme heterojunctions and the results presented herein can potentially help develop a new method to realize photocatalytic hydrogen evolution.
研究领域:
材料科学
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能源科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Environmental Science & Technology Letters
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2021
·
IF 7.653
Wenjuan Zhang,Yue Gao,Cheng Chen,Aijing Li,Xuerui Ma,Yong Liang,Xinglei Yao,Maoyong Song,Guibin Jiang
Bisphenol S (BPS) is a bisphenol A (BPA) replacement that is widely present in the environment and in humans. The association between obesity and BPS has been reported in epidemiological studies; however, the obesogenic effect and related mechanism of BPS remain poorly understood. In this study, high-resolution microcomputed tomography analysis showed that the volume of visceral fat was significantly increased in BPS-treated mice. Moreover, BPS showed a higher potency to induce visceral fat formation in mice than BPA at the exposure concentration of 5 mg/kg/day for 14 days. Nontargeted metabolomic analysis showed that BPS exposure induced multiple metabolic disorders in the livers of BPS-treated mice. Interestingly, the body weight and volumes of visceral fat returned to normal by co-treatment with succinate in BPS-treated mice, suggesting that succinate might be the key molecule for the link between BPS and visceral obesity. Our findings highlight that BPS may act as an environmental obesogen to promote obesity.
研究领域:
环境科学
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代谢生物学
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毒理学
✓ 已验证
产品关联
DOI
高影响因子
ENZYME AND MICROBIAL TECHNOLOGY
·
2021
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IF 3.493
Siyu Ren,Xinkuan Cheng,Long Ma
Natural fluorinated products are rare and attract great attention. The de novo fluorometabolites biosynthetic pathway in microbes has been studied. It is revealed that the carbon-fluorine (C-F) bond is formed by an exotic enzyme called fluorinase (FLA) when using fluorine ions and S -adenosyl- l -methionine (SAM) as substrates. However, the resource of the precursor SAM is still elusive. To solve this, a novel methionine adenosyltransferase from Streptomyces xinghaiensis (SxMAT) was identified and characterized. We proved that SAM was enzymatically synthesized by SxMAT, an enzyme that mediated the reaction between adenosine triphosphate (ATP) and l -methionine ( l -Met) with 99% diastereoisomeric excess ( d.e. ) and 80% yield. Such high diastereoselectivity had never been reported before. SxMAT was a Co 2+ -dependent metalloenzyme. The results showed that the metal cobalt ion contributes to the activity and selectivity of SxMAT. Molecular docking was performed to reveal its catalytic mechanism. The optimal temperature and pH were 55 °C and 8.5, respectively. Lastly, a two-step tandem enzymatic reaction using SxMAT and FLA both from S . xinghaiensis to generate 5’-fluoro-deoxyadenosine (5’-FDA) was performed. This implied that SxMAT may be present in this fluorometabolites biosynthetic route. These results suggested that SxMAT could be a useful biocatalyst for the synthesis of optically pure ( S )-S-adenosyl- l -methionine, an important nutraceutical. In addition, SxMAT will probably play an important role in the biosynthetic pathway of fluorinated natural products in bacteria.
研究领域:
生物化学
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酶学
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生物催化
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天然产物化学
✓ 已验证
DOI
PubMed
高影响因子
Chemistry-An Asian Journal
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2025
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IF 3.3
Xianghan Li,Hongyan Shu,Xinna Xu,Yalan Wang,Lingzhi Zhao,Ying Liu,Juanjuan Peng
Cathepsin S (CatS) is a lysosomal enzyme belonging to the papain family of cysteine proteases. Studies have demonstrated that CatS plays a pivotal role in antigen presentation and is associated with Alzheimer's disease, atherosclerosis, and obesity, positioning it as a potential target in related disorders. Consequently, the development of a selective and straightforward method for detecting CatS is crucial. In this study, we introduce a colorimetric approach utilizing gold nanoparticles (AuNPs) and CatS-specific peptides for the detection of CatS activity. The CatS enzyme cleavage peptides, PMGAPC or PMGAPC-NH 2 , can stabilize AuNPs in a hydrosaline solution without aggregation. Upon hydrolysis of PMGAPC or PMGAPC-NH 2 by CatS, the AuNPs aggregate with a color change from red to blue. After optimizing the size of the AuNPs and the concentration of the peptides, the limits of detection for CatS were both to be 10 nM, when PMGAPC or PMGAPC-NH 2 were used to protect the AuNPs. Therefore, this colorimetric assay, which employs peptides and AuNPs, enables not only a selective but also a simple detection of CatS, visible to the naked eye.
研究领域:
生物化学
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医学诊断
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纳米生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
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2024
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IF 3.8
Worku Lakew Kebede,Kuo Dong-Hau,Chen Xiaoyun
Metal oxide semiconductor photocatalysts have received remarkable consideration as a promising technology for environmental remediation and energy conversion. Oxysulfide semiconductors have narrow band gaps which are appropriate for photocatalytic removal of toxic organic pollutants under visible light illumination. For the elimination purpose of these pollutants, Mo(O,S) 2 , Mn(O,S) 2 , and Mn–Mo(O,S) 2 oxysulfide catalysts containing various Mn contents were synthesized at low temperatures via a simple method. The structural, morphological, electrochemical, compositional, and optical properties of the as-synthesized catalysts were exhaustively characterized. The photocatalytic degradation activity of the bares Mo(O,S) 2 , Mn(O,S) 2 , and other Mn–Mo(O,S) 2 compositions were evaluated over different types of organic pollutants under visible light illumination. The addition of Mn in Mo(O,S) 2 structure improved the photodegradation activity, and Mn–Mo(O,S) 2 -30 was found to be the best composition with superior photodegradation performance towards the four cationic, anionic, and neutral dyes. The degradation efficiency of 10 ppm of MB, and MO dyes reach 99.7 % and 98.6 %, within 30 and 120 min, respectively. Mn–Mo(O,S) 2 -30 catalyst also shows a good photodegradation performance on Rh B and NR organic pollutants. According to the recycling test, the catalyst exhibited excellent performance. The photodegradation follows pseudo-first order kinetics with a rate constant of 0.097 and 0.036 min −1 for MB and MO dyes, respectively. The trapping experiment showed that superoxide anion radicals (O 2 •- ) and holes (h + ) are the responsible active species for the degradation on MO and MB, respectively. The novelty of using Mn–Mo(O,S) 2 -30 for various dyes degradation lies in its remarkable catalytic properties.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Jiawen Yan,Ke Sang,Xiaohan Jiang,Qiming Li,Fuyi Jiang,Yanli Zhou
In this study, amorphous MoS 3 -modified porous Co 4 S 3 -embedded N,S co-doped carbon polyhedron (Co 4 S 3 @NSC/MoS 3 ) was rationally prepared via a multi-step method. One-dimensional linear-like MoS 3 with a high specific capacity of 894 mAh g −1 and abundant active sites compensated for the low capacity of Co 4 S 3 , thus enhancing the sodium ion storage capacity of the entire electrode. Moreover, three-dimensional N,S co-doped carbon networks (NSC) significantly inhibited large volumetric fluctuations in Co 4 S 3 and MoS 3 , thereby sustaining the structural stability and enhancing the electron transfer efficiency. As a new anode material for sodium-ion half batteries, the constructed Co 4 S 3 @NSC/MoS 3 with rapid Na + diffusion and charge transfer kinetics demonstrated better sodium storage properties than Co 4 S 3 @NSC. At a rate of 0.5 A g −1 over 100 cycles, the reversible specific capacity of Co 4 S 3 @NSC/MoS 3 reached 594 mAh g −1 . Even when cycled at a rate of 2 A g −1 for 600 cycles, the charge capacity was stable at 435 mAh g −1 . The rate performance of Co 4 S 3 @NSC/MoS 3 was also found to be remarkable; when the rate increased to 10 A g −1 , the average capacity was retained at 382 mAh g −1 . Apart from half cells, reduced graphene oxide (rGO)-modified Na 3 V 2 (PO 4 ) 3 composite (Na 3 V 2 (PO 4 ) 3 @rGO) was used as the cathode material to match with Co 4 S 3 @NSC/MoS 3 . The assembled full batteries were analyzed and their electrochemical properties were discussed. They also exhibited outstanding rate capability and high-rate long-life cyclic property. Even at 1 A g −1 over 500 cycles, the discharge capacity was stably maintained at 246 mAh g −1 . The outstanding sodium storage properties of Co 4 S 3 @NSC/MoS 3 mainly depended on the cooperative effects of MoS 3 and Co 4 S 3 @NSC, indicating the potential application of Co 4 S 3 @NSC/MoS 3 in energy storage fields.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Yingqi Chen,Yufei Cheng,Junfeng Zhao,Wenwan Zhang,Jianhua Gao,Hui Miao,Xiaoyun Hu
Antimony sulfide (Sb 2 S 3 ) is a relatively abundant and environmentally friendly emerging photovoltaic material, which has been gradually applied in solar cells and photocatalysis. It has high light absorption capacity, but it suffers many deep-level defects and is prone to recombination of electron-hole pairs within itself. Here, by constructing the Sb 2 S 3 /CdIn 2 S 4 S-scheme heterojunction, we avoided the problem that electrons and holes cannot be separated and transported effectively due to many Sb 2 S 3 defects (more recombination centers), and improved its application in the field of photoelectrochemical water splitting. Meanwhile, in order to further improve the performance of Sb 2 S 3 /CdIn 2 S 4 photoelectrode, we introduced CdS energy platform between Sb 2 S 3 and CdIn 2 S 4 to form a Sb 2 S 3 /CdS/CdIn 2 S 4 cascaded S-scheme heterojunction. Compared with Sb 2 S 3 monomer, Sb 2 S 3 /CdS/CdIn 2 S 4 had higher absorbance intensity, IPCE value, ABPE value, and lower charge transfer resistance. In addition, the photocurrent density of the Sb 2 S 3 /CdS/CdIn 2 S 4 photoelectrode was about 4.20 mA/cm 2 (1.23 V vs. RHE), which was 1.3 times higher than that of the Sb 2 S 3 /CdIn 2 S 4 photoelectrode (3.29 mA/cm 2 ) and 3.2 times higher than that of monomer Sb 2 S 3 photoelectrode (1.32 mA/cm 2 ). This method offers new prospects for optimizing the performance of antimony chalcogenides photoelectrodes for photoelectrochemical water splitting.
研究领域:
材料科学
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能源科学
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光催化
✓ 已验证
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Xiaoxue Ke,Changcun Tang,Renzhi Xiong,Yanhe Xiao,Baochang Cheng,Shuijin Lei
It is an important strategy to design composite materials with a special microstructure and a tunable electronic structure through structural compatibility. In this work, a novel hexagonal/cubic ZnIn2S4 polymorphic heterophase junction with a three-dimensional multihierarchical structure is successfully constructed by in situ growth of hexagonal ZnIn2S4 nanosheets on the surface of cubic ZnIn2S4 flower-like microspheres prepared by topological chemical synthesis. On the one hand, the multihierarchical architecture provides large specific surface area, abundant active sites, and excellent light trapping capability. On the other hand, the construction of a direct S-scheme heterophase junction enables the formation of a special charge-transfer channel under the force of a built-in electric field, which not only improves the separation efficiency of carriers but also ensures the stronger reaction activity of charges. The prepared ZnIn2S4 heterophase junction composite photocatalyst exhibits greatly boosted photocatalytic efficiency in rhodamine B degradation, hexavalent chromium reduction, and water splitting for hydrogen production, which are 12.3, 6.5, and 3.1 times higher than that of pure hexagonal ZnIn2S4 and 8.1, 5.1, and 2.3 times higher than that of pure cubic ZnIn2S4, respectively, demonstrating its significant potential for applications in energy and environmental fields.
研究领域:
材料科学
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环境科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2023
·
IF 10.9
Haozhen Zhang,Jingjing Liu,Yong Zhang,Bei Cheng,Bicheng Zhu,Linxi Wang
Constructing step-scheme (S-scheme) heterojunctions has become a popular strategy for efficient photocatalytic H 2 O 2 generation. Herein, we in situ grew BiOBr nanosheets (NSs) on a Schiff-base covalent organic framework (COF) with large π-conjugated structures to prepare S-scheme BiOBr/COF photocatalysts for H 2 O 2 synthesis. The highest photocatalytic H 2 O 2 production performance of the composite sample constituting the S-scheme heterojunction is 3749 µmol g −1 h −1 , which was 1.85 and 27 times the rates of COF and BiOBr, respectively. The construction of S-scheme heterojunction contributed to efficient carrier transfer and separation in space and enhanced redox power. Moreover, the lying-down O 2 -adsorption configuration on the COF surface favors the concerted two-electron O 2 reduction process, which greatly reduced the reduction potential requirement for O 2 -to-H 2 O 2 conversion. The synergy between the S-scheme heterojunction and the unique O 2 –COF interaction boosted photocatalytic H 2 O 2 production activity.
研究领域:
材料科学
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环境科学
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化学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2017
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IF 5.651
Yunping Tang,Guomei Zhang,Zheng Wang,Dan Liu,Linglu Zhang,Yafeng Zhou,Ju Huang,Fangmiao Yu,Zuisu Yang,Guofang Ding
(S)-3-chloro-1-phenyl-1-propanol ((S)-CPPO) is an important chiral intermediate predominantly used in the synthesis of the chiral side chain of (S)-fluoxetine. In this study, carbonyl reductase (CBR) from Novosphingobium aromaticivorans was successfully expressed in recombinant E. coli . The enzymatic activity of the recombinant CBR was significantly increased to 1875 U/mL in the fed-batch fermentation in a 10 L fermenter and recombinant CBR was then purified and characterized. By regenerating NADH with glucose dehydrogenase, 100 g/L 3-chloro-1-phenyl-1-propanone (3-CPP) was successfully converted to (S)-CPPO with a conversion of 100% and ee value of 99.6% after 12 h at 30 °C in PBS buffer (pH 7.0), which are the highest reported to date for the bio-production of (S)-CPPO and presented great potential for green production of (S)-CPPO at industrial scale.
研究领域:
生物技术
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酶学
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药物化学
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工业生物催化
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Xiaoying Xu,Shaofeng Dong,Jialong Lv,Guocheng Huang,Qiaoshan Chen,Jinhong Bi
The carrier transfer mechanism of S-scheme heterojunctions has been extensively explored, yet their impact on light absorption performance remains ambiguous. In this work, a finely designed S-scheme heterojunction was developed by coupling oxidation photocatalyst a specific covalent organic framework (COF)-TaTp, and reduction photocatalyst SnS 2 (SS) for in-situ H 2 O 2 photo-production and sterilization. The optimized 10% SS/TaTp achieved a 3.45- and 16.87-fold enhancement in H 2 O 2 generation than pure TaTp and SS, respectively, with significant improvements under visible and near-infrared (NIR) light. In-situ XPS, EPR, and Kelvin probe force microscopy (KPFM) verified the S-scheme charge transfer mechanism, underscoring accelerated photo-induced electrons migration and strengthened redox capacity. The internal electric field of 10% SS/TaTp was calculated to be 2.14 and 4.63 times stronger than TaTp and SS. Intriguingly, the electron localization function and partial density of states analyses revealed that the interfacial C-N-S covalent bonds finely tuned the energy band structure and generated hybrid energy levels in the heterojunction, thus improving light harvesting and catalytic performance in both visible-light and NIR region. This work highlights the role of interfacial covalent interactions in tuning energy levels in COF-based S-scheme photocatalysts.
研究领域:
材料科学
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环境科学
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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）