ORGANIC & BIOMOLECULAR CHEMISTRY
·
2023
·Vol. 21
·期 16
·3417-3422
·
IF 3.2
Yuyan Zhao,Xu Jiang,Shihuan Zhou,Jin Tian,Piao Yang,Yanli Chen,Quan Zhang,Xianlin Xu,Yongzheng Chen,Jiawei Yang
Optically pure sulfoxides are noteworthy compounds that find wide applications in various industrial fields. Here, we report a methionine sulfoxide reductase B (MsrB) homologue that exhibits high enantioselectivity and broad substrate scope for the kinetic resolution of racemic (rac) sulfoxides. This MsrB homologue, named liMsrB, was identified from Limnohabitans sp. 103DPR2 and showed good activity together with enantioselectivity towards a series of aromatic, heteroaromatic, alkyl and thioalkyl sulfoxides. Chiral sulfoxides in the S configuration were prepared in approximately 50% yield and 92–99% enantiomeric excess through kinetic resolution at an initial substrate concentration of up to 90 mM (11.2 g L−1). This study presents an efficient route for the enzymatic preparation of (S)-sulfoxides through kinetic resolution.
研究领域:
生物化学
·
酶工程
·
工业生物技术
✓ 已验证
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2024
·
IF 2.7
Xue Xing,Weiwei Cao,Zhaoxin Wu,Xiaohong Bai,Jiarui Gao,Xiaozhen Liang,Bo Wang,Chao Wang,Dalian Shi,Linwei Lv,Yonglin Bai
A series of ZnS 0.75 O 0.25 :0.1%Ce 3+ , x %Tb 3+ phosphors were prepared by high temperature solid state reaction method. These phosphors exhibited two mixed phases consisting of hexagonal phase ZnS and hexagonal phase ZnO with the average particle size of 13.83 μm and emitted blue-green light. The luminescence mechanism consisted of Zn vacancy defects, the 5d 1 → 2 F 5/2 radiative transitions of Ce 3+ , the 5 D 4 → 7 F 5 and 5 D 4 → 7 F 6 radiative transition of Tb 3+ induced by the energy transfer of Ce 3+ → Tb 3+ . An equation for the variation of the fluorescence lifetime of ZnS 0.75 O 0.25 :0.1%Ce 3+ , x %Tb 3+ phosphors with concentration of Tb 3+ fraction was obtained by exponential fitting. The short fluorescence lifetime could be tuned within the range of 113 μs to 550 μs with the increase of Tb 3+ concentration, and the color was tunable from blue to blue-green, which is of important application in the field of high-energy particle detection.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Haoqi Guo,Mengxi Fu,Rui Du,Razium Ali Soomro,Li Guo,Xin Huang,Mimi Wang,Chunming Yang,Danjun Wang
The inefficient charge separation and transport remains a bottleneck in photocatalysis. While various strategies have been explored to improve this process, most focus on single-sided modulation either the conduction-band electrons or valence-band holes, limiting overall improvement. Herein, an innovative coupling modification approach is adopted where Ru and α-Fe 2 O 3 (FO) nanoparticles are integrated onto ZnIn 2 S 4 (ZIS) to prepare Ru/ZnIn 2 S 4 /α-Fe 2 O 3 , and constructs dual charge transfer pathways for electrons and holes. This bidirectional channel configuration significantly enhances carrier separation and accumulation, enabling Ru as an electron (e − ) mediator and FO as a hole (h + ) extraction facilitator, driving simultaneous redox reactions, and enabling substantial improvement in the photocatalytic sulfur oxidation process coupled with hydrogen generation. This approach enhances interface charge separation/spatial accumulation and provides valuable guidance for designing and developing advanced high-efficiency photocatalytic systems.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2024
·
IF 6.3
Pengkun Zhang,Haoyu Wang,Yujie Lai,Yunzhuo Xu,Longyan Chen,Qinhan Wu,Dong-Hau Kuo,Dongfang Lu,Mengistu Tadesse Mosisa,Jiqing Li,Jinguo Lin,Xiaoyun Chen
The rising accumulation of pollutants, including heavy metals and toxic organics, necessitates effective environmental remediation to protect health and biological systems. In this study, a cubic cerianite CeO 2 -like Co/S co-doped CeO 2 sulfur-oxide catalyst (labeled as CeCoOS) with super catalytic reduction performance of pollutants with NaBH 4 as a reducing agent under dark was prepared via a green and facile preparation method. Transition metal Co 2+ -cation and S 2− -anion co-doped CeO 2 adjusted the energy bandgap and introduced oxygen vacancy (Vo), which converted Ce 4+ around Vo into Ce 3+ to maintain electric neutrality. The heterovalent Ce 4+ /Ce 3+ states in Co/S-CeO 2 enhance the electron lifetime and facilitate fast electron transfer . The valence transition between Ce 4+ /Ce 3+ and Vo make the Co/S co-doped in CeO 2 catalyst increase its electrochemically active surface sites and accelerate the pollutants reduction reaction. The CeCoOS-3 with Co/S dopants has an excellent catalytic reduction activity to completely reduce 20 ppm toxic 4-NP in 10 min, 50 ppm organic dyes of MB, RhB, and MO in 6 min, and 50 ppm heavy metal Cr 6+ in 10 min. The CeCoOS-3 sulfur-oxide catalyst also exhibited excellent stability in the reusability test. Therefore, CeCoOS sulfur-oxide catalysts are expected to be used for dye decolorization, detoxification of organic toxins, and reduction of electroplating wastewater.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ACS ES&T Water
·
2024
·
IF 4.8
Wei Yang,Wei Li,Haixiao Zhao,Xiao Ma,Feiyang Xia,Qian Tan
Nitrogen pollution causes eutrophication and algal blooms worldwide. Algae-derived organic sulfides can interact with organisms to affect nitrogen cycling, but the associated patterns and mechanisms remain unclear. This study investigated the effects of dimethylsulfoniopropionate (DMSP), an important bioactive sulfide, on nitrogen transformation and removal at the water–sediment interface in microcosm systems (water–sediment and water–sediment–biofilm–benthos). Results showed that DMSP altered the dynamics of total nitrogen and dissolved inorganic nitrogen in overlying water, particularly promoting 74.39% reduction of nitrate in the system containing biofilm and benthos. The presence of DMSP in conjunction with biofilm and bioturbation affected the nitrogen transformation in the sediment. DMSP increased the content of dissolved organic carbon but decreased the content of dissolved oxygen in water. Moreover, it was converted to sulfate in water, enhancing the abundance of bacteria capable of denitrification and sulfur oxidation (such as Pseudomonas) as well as related genes, including narGHI, norBC, soxA, soxC, soxY, and soxZ, in the biofilm. This observation suggests that the process of sulfur oxidation promotes denitrification. The current study highlights the potential applications of DMSP in water purification systems and presents a novel biological approach to aquatic management.
研究领域:
环境微生物学
·
水污染治理
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2024
·
IF 9.7
Shuyan Yin,Yi-Xuan Wang,Cheng Hou,Jing Wang,Jing Xu,Xinbai Jiang,Dan Chen,Yang Mu,Jinyou Shen
Anammox coupled partial S 0 -driven autotrophic denitrification (PS 0 AD) technology represents an innovative approach for removing nitrogen from wastewater. The research highlighted the crucial role of biofilm on sulfur particles in the nitrogen removal process. Further analysis revealed that sulfur-oxidizing bacteria (SOB) are primarily distributed in the inner layer of the biofilm, while anammox bacteria (AnAOB) are relatively evenly distributed in inner and outer layers, with Thiobacillus and Candidatus Brocadia being the dominant species, respectively. Except for anammox and PS 0 AD processes, 15 N isotope labeling tests determined that sulfur reshaped nitrogen metabolism pathways, providing solid evidence for the occurrence of sulfammox process. SOB and AnAOB collaborate in nitrogen and sulfur conversion, with SOB-drived PS 0 AD processes reducing nitrate to nitrite for AnAOB to remove ammonia. Conversely, the nitrate produced from anammox process can be reused by SOB. Metagenomic analyses verified that SOB drove the PS 0 AD process through encoding soxBYZ gene, while AnAOB might play an important role in simultaneously driving the anammox and sulfammox processes. These findings underscore the importance of biofilm and clarify the nitrogen-sulfur cycle mechanisms within the coupled system.
研究领域:
环境微生物学
·
废水处理工程
·
分子生态学
✓ 已验证
DOI
高影响因子
FUEL
·
2018
·
IF 4.908
Jian Liu,Rui-tang Guo,Ming-yuan Li,Peng Sun,Shu-ming Liu,Wei-guo Pan,Shuai-wei Liu,Xiao Sun
Mn/TiO 2 catalyst is a promising candidate for future utilization in low-temperature NH 3 -SCR reaction, but its bad resistance to SO 2 is still a great challenge for practical application. In this study, Eu was successfully used as the additive to improve its resistance to SO 2 under SCR conditions, while the pretreatment of Mn/TiO 2 and MnEu/TiO 2 catalyst by SO 2 + O 2 had a strong deactivation effect on them. In situ DRIFT study clarified that the deactivation of Mn/TiO 2 -S (SCR + SO 2 ), Mn/TiO 2 -S (SO 2 + O 2 ) and MnEu/TiO 2 -S (SO 2 +O 2 ) were mainly originated from the inhibited adsorption of NH 3 and NOx species, as well as the formation of a large amount surface sulfate species on them, which had a strong blacking effect on the SCR reactions over the three catalysts via both E-R and L-H routes. After the addition of Eu, SCR reaction over MnEu/TiO 2 catalyst with the existence of SO 2 took place through L-H pathway, accompanied by the generation of less surface sulfate species, which brought about the excellent SO 2 tolerance of MnEu/TiO 2 catalyst under SCR conditions.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2021
·Vol. 306
·期 3
·2000606
·
IF 4.367
Pengfei Jiang,Jiulin Shen,Yao Wang,Jibin Zhang,Xiangfu Liu,Guoli Tu
Due to the development of dynamic flexible organic light-emitting diode displays, colorless polyimides (CPI) as the supporting or protecting optical films, are facing significant challenges due to the requirements of optical, mechanical, thermal, and chemical properties. Typical CPIs are derived from TFDB (2,2-bis(trifluoro-methyl)-4,4′-diaminobiphenyl)/6FDA (4,4′-(hexafluoroisopropylidene)diphthalic anhydride), which still need to be improved in both dimensional stability and optical performance. In this communication, a strong electron acceptor group, the sulfoxide bond, is first introduced into the TFDB block of CPI chains. Based on this introduction, the distribution of the electron cloud in the polymer chain is reconstructed under the strongly pulling electron effect, and the spatial conformation of the polymer chain is also affected by the rigid and twisted sulfoxide group. The influences on CPI's optical properties, especially the refractive index and the retardation, are studied and discussed in detail by experimental results and theoretical calculations. It is shown that the CPI with the sulfoxide group exhibits higher optical transparency, lower yellow index, phase retardation and coefficient of thermal expansion, which is an ideal material for CPI optical films.
研究领域:
材料科学
·
光学工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2019
·
IF 6.669
Zhuqiu Sun,Bowen Pang,Jinying Xi,Hong-Ying Hu
Eight species of mixotrophic sulfide oxidizing bacteria (SOB) were isolated from activated sludge and identified using 16S rRNA sequence analysis. The effects of organic substances, dissolved oxygen (DO) and nitrate on sulfide oxidation and bacterial growth were studied in this work. The results showed that Paracoccus sp . (N1), Pseudomonas sp. (N2) and Pseudomonas sp. (S4) have strong adaptability to environments with low DO and high concentrations of organic substance. An SOB additive was optimized in artificial, odorous water. The optimized SOB additive is a blend of 80% N1 and 20% N2 bacteria solution with absorbance equal to 0.5 at a wavelength of 600 nm (OD 600 ), and the optimal dose of the additive is 20 ml/L. Oxidation-reduction potential (ORP), ammonia-nitrogen (NH 3 -N) and released H 2 S in an odorous river were measured with and without SOB additive, and the results indicated that the optimized SOB additive has excellent performance for odorous river bioremediation.
研究领域:
环境微生物学
·
水处理工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Wulve Fan,Zhiliang Zhu,Xiaochang Liu,Hua Zhang,Yanling Qiu,Daqiang Yin
Nitrogen oxides and sulfur oxides , as the dominant toxic gases in the atmosphere, can induce severe human health problems under the composite pollutant conditions. Currently the effect of nitrogen or sulfur oxides in atmospheric environment to the degradation and cytotoxicity of triphenyl phosphate (TPhP) on atmospheric particle surfaces still remain poorly understood. Hence, laboratory simulation methods were used in this study to investigate the effect and related mechanism. First, particle samples were prepared with the TPhP coated on MnSO 4 , CuSO 4 , FeSO 4 and Fe 2 (SO 4 ) 3 surface. The results showed that, when nitrogen or sulfur oxides were present, more significant TPhP degradation on all samples can be observed under both light and dark conditions. The results proved nitrogen oxides and sulfur oxides were the vital influence factors to the degradation of TPhP, which mainly promoted the OH generation in the polluted atmosphere. The mechanism study indicated that diphenyl hydrogen phosphate (DPhP) and OH-DPhP were two main stable degradation products . These degradation products originated from the phenoxy bond cleavage and hydroxylation of TPhP caused by hydroxyl radicals . In addition, no TPhP related organosulfates (OSs) or organic nitrates (ON) formation were observed. Regarding the cytotoxicity, all the particles can induce more significant cellular injury and apoptosis of A549 cells , which may be relevant to the adsorbed nitrogen oxides or sulfur oxides on particles surfaces. The superfluous reactive oxygen species (ROS) generation was the possible reason of cytotoxicity. This research can supply a comprehensive understanding of the promoting effect of nitrogen and sulfur oxides to TPhP degradation and the composite cytotoxicity of atmospheric particles.
研究领域:
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Reaction Chemistry & Engineering
·
2021
·Vol. 6
·期 8
·1475-1482
·
IF 4.239
Yanxin Wang,Kaiyue Yao,Duanjian Tao,Nian Xiang,Wei Wang,Zehui Zhang
In this study, Al2O3/nitrogen-doped carbon supported cobalt catalysts (Co–NC/Al2O3-T, where T represents the pyrolysis temperature) were successfully prepared by a one-step pyrolysis method and studied for the hydrodeoxygenation of sulfoxides into sulfides. The structure of the Co–NC/Al2O3-T catalysts was greatly affected by the pyrolysis temperature, and thus the pyrolysis temperature showed a great influence on the catalytic activity of the Co–NC/Al2O3-T catalysts. The Co–NC/Al2O3-500 catalyst demonstrated excellent catalytic performance for the hydrodeoxygenation of sulfoxides into sulfides with yields from 94% to 98% under mild conditions (80 °C and 10 bar H2), and the catalytic activity of Co–NC/Al2O3-500 was found to be comparable with that of reported noble metal catalysts. Both the support and the metallic cobalt nanoparticles crucially contributed to the excellent catalytic activity of the Co–NC/Al2O3-500 catalyst. More importantly, the Co–NC/Al2O3-500 catalyst showed a good stability after five runs.
研究领域:
催化化学
·
材料科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2011
·
IF 3.074
Ning Ding,Ying Zheng,Cong Luo,Qi-long Wu,Pei-fang Fu,Chu-guang Zheng
Chemical-looping combustion (CLC) has been recognized as an energy-efficient method for CO 2 capture. For calcium sulfate (CaSO 4 ) oxygen carrier, the rapid fall in the mechanical strength and reactivity limits its application in CLC. In this study, Taguchi robust design method with L 9 orthogonal array was implemented to optimize extrusion condition for the preparation of binder-supported CaSO 4 oxygen carriers. The orthogonal experiment results showed the addition of SB powder enhanced both mechanical strength and conversion of CaSO 4 , and the optimal extrusion condition was 30 g CaSO 4 , 12 g SB powder, 2.5 mL acetic acid, and 15 mL water. The favorable oxygen carriers were comprehensively studied in a fixed bed reactor. The results of reduction test showed the mass-based reaction rates of the binder-supported CaSO 4 were significantly increased, because the fresh samples had the higher surface area which was evidenced by pore structure analysis. Moreover, the favorable performance of binder-supported CaSO 4 was explained by formation of CaAl 2 O 4 which had excellent thermal stability and provided a stable nanosized framework between the crystal grains observed by field emission scanning electron microscope (FESEM).
研究领域:
能源科学
·
材料科学
✓ 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）