ULTRASONICS SONOCHEMISTRY
·
2023
·
IF 8.4
Xuxu Wang,Jianfeng Ran,Haisheng Duan,Ying Chen,Jiaping Zhao,Shaohua Yin,Shiwei Li,Libo Zhang
High content sulfur (S 2− ) in Bayer liquor can increase alkali consumption, accelerate equipment corrosion, especially seriously affect alumina production. The removal of S 2− in Bayer liquor is studied using ultrasonic enhanced ozone method, which significantly improves the removal efficiency. Results indicate that the best removal efficiency of 93.83 % is obtained with reaction duration of 20 min, oxygen flow rate of 80 L/h, ultrasonic power of 60 W and reaction temperature of 60 °C. The comparative analysis shows that the removal efficiency of S 2− is 25.34 % higher than that of ozone (O 3 ) system after introducing ultrasound (US), indicating that US accelerates the mass transfer process of O 3 and increases the hydroxyl radicals ( OH) content. For further explanation of the mechanism of US/O 3 system, EPR and XPS spectra are applied to analyze the content of free radical and the form of sulfur in Bayer liquor, indicating that the content of free radical in US/O 3 system is more than US and O 3 systems, and all sulfur is converted to SO 4 2− after full oxidation.
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高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2020
·
IF 5.162
Hong Yao,Lei Wang,Xin Tang,Zhuo Yang,Huanyong Li,Chongzhen Sun,Xiyang Wu,Dan Xu
In this research, two novel polysaccharides (S1 and S2) from Solanum nigrum L were extracted and purified. Then homogeneity, molecular weights, major chemical contents and monosaccharide compositions of S1 and S2 were determined. Then, the effects of S1 and S2 on human faecal microbial community and short-chain fatty acid production were investigated using an in vitro fermentation model. Results showed that S1 and S2 have different impacts on human gut microbiota in vitro . S1 selectively promoted the abundance of 9 genera and the production of propionic acid, butyric acid, isobutyric acid, valeric acid and isovaleric acid; while S2 selectively promoted the abundance of 8 genera and the production of acetic acid, propionic acid, butyric acid, isobutyric acid, valeric acid, isovaleric acid and succinic acid. Also, S1 group had higher abundance of genera Butyricimonas and Megamonas and higher levels of lactic acid than S2; while S2 group had higher abundance of Megaphaera and higher levels of butyric acid, valeric acid, isobutyric acid, isovaleric acid and succinic acid comparably. We concluded that S1 and S2 may have potential prebiotic functions.
研究领域:
食品科学
·
微生物学
·
营养学
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PubMed
高影响因子
ANALYTICAL CHEMISTRY
·
2019
·
IF 6.35
Junli Guo,Lingling Yang,Huijie Xu,Chenxi Zhao,Zhenqing Dai,Zhida Gao,Yanyan Song
The level of hydrogen sulfide in the brain and vasculature has long been associated with human health and diseases. Hence, simple and robust analytical tools allowing determination of hydrogen sulfide levels are highly desirable. In this work, a biomineralization-driven ion gate in TiO2 nanochannel arrays for H2S sensing was designed and developed. The formed CuS precipitation decreased the transmembrane current in the presence of bovine serum albumin used as biological mineralizer. Label-free assay for sensing of intracellular S2– was achieved based on changes in ionic current with a detection limit of 56 MCF-7 cells. More importantly, the proposed sensing strategy was promising for reusable application through dissolution of CuS in an acidic media (pH = 1).
研究领域:
生物传感
·
医学诊断
·
材料科学
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PubMed
高影响因子
Nanoscale
·
2024
·Vol. 16
·期 28
·13654-13662
·
IF 5.8
Naiwei Wei,Hong Zhu,Danni Yan,Shuai Yang,Lili Xu,Shengli Zhang,Yuhui Dong,Yousheng Zou,Haibo Zeng
I–III–VI quantum dots (QDs) have gained widespread attention owing to their significant advantages of non-toxicity, large structural tolerance, and efficient photoluminescence potential. However, the disbalance of reactivity between the elements will result in undesired products and compromised optical properties. Reducing the activity of highly reactive group IB elements is the most common approach, but it will reduce the overall reactivity and lead to a wide dispersion of QD sizes. In this study, we propose a method to improve the overall reactivity of the reaction system using the highly active IIIA precursor InI3, which triggers rapid nucleation and promotes the formation of Ag(In,Ga)S2 (AIGS) QDs, resulting in monodisperse particle size distributions and a significantly improved photoluminescence quantum yield (PLQY) (from 12% to 72%). Furthermore, narrow band edge emission is realized by coating a gallium sulfide (GaSx) shell on the basis of obtaining high-quality AIGS QDs. The core/shell QDs exhibit a 90% PLQY with a full width at half maximum (FWHM) of only 31 nm at 530 nm. This study provides a viable design strategy to synthesize monodisperse AIGS QDs with a narrow peak width and efficient luminescence, promoting the application of AIGS QDs in the field of luminescent displays.
研究领域:
材料科学
·
纳米技术
·
光学
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2023
·
IF 4.5
Peng Wang,Liping Hao,Hongxin Wang,Liu Xuanwen
Nickel-iron layered double hydroxides (NiFe LDH) are subject to surface reconstruction by the applied anodic potential in alkaline media, and the reconstructed metal hydroxyl oxides are often considered to be the actual active material for oxygen evolution reaction (OER), so how to facilitate surface reconstruction is crucial for their performance. In this paper, the surface reconstruction of NiFe LDH nanosheets was successfully induced by S 2- corrosion using rapid wet chemical engineering without affecting their crystal structure and nanomorphology; Notably, the NiOOH species formed on the corroded S-NiFe LDH/NF surface participate in the OER process as active species. The electrochemical measurements show that S-NiFe LDH/NF has a low overpotential of 250 mV and a Tafel slope of 26.3 mV dec -1 at 50 mA cm −2 . This work provides a simple activation strategy for the surface reconstruction of NiFe LDH, which is an important reference for the design of advanced catalysts.
研究领域:
材料科学
·
电化学
·
催化科学
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高影响因子
Small
·
2025
·
IF 12.1
Lizhuo Qi,Jing Li,Yuanyuan Liu,Kaihua Liu,Meiri Wang,Hongtao Cui
The behavior transformation of battery-type materials to extrinsic pseudocapacitive behavior is accomplished by suppressing their phase transition. The resulting extrinsic pseudocapacitive materials are a valuable supplement to intrinsic pseudocapacitive materials, enriching the connotation of pseudocapacitive materials. Nevertheless, the research on this category of materials remains inactive as of now, probably due to the as yet unclear phase transition suppression mechanism and the associated electrochemical mechanism. In this work, the battery-type Co(OH) 2 is selected as a research object to create an extrinsic pseudocapacitive material by S 2− doping. It is revealed that the K + intercalation/deintercalation is the essential reason for the phase transition of CoOOH that is irreversibly converted from Co(OH) 2 , leading to its battery-type behavior. Whereas, the fully protonated CoOOH produced due to the high reaction activity of S 2− doped Co(OH) 2 only allows the intercalation/deintercalation of H + . During the process of intercalation/deintercalation of H + , CoOOH retains the P3 structure, thereby giving rise to extrinsic pseudocapacitive behavior. The electrochemical measurement results indicate that this extrinsic pseudocapacitive material and the assembled device have electrochemical performance equivalent to that of intrinsic pseudocapacitive materials.
研究领域:
材料科学
·
电化学
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PubMed
高影响因子
Small
·
2023
·Vol. 19
·期 40
·2302819
·
IF 13.3
Kaixuan Ding,Hongping Wu,Zhanggui Hu,Jiyang Wang,Yicheng Wu,Hongwei Yu
Salt-inclusion chalcogenides (SICs) have been receiving widespread attention due to their large second harmonic generation (SHG) responses and wide bandgaps, however most of them suffer from small birefringence limiting their technical application. Herein, by introducing the π -conjugated (S 2 ) 2− units in the ionic guest of salt-inclusion structure, the first disulfide-bond-containing SIC, [Ba 4 (S 2 )][ZnGa 4 S 10 ] has been synthesized. It exhibits the widest bandgap up to 3.39 eV among polychalcogenides and strong SHG response as large as that of AgGaS 2 (AGS). Importantly, its birefringence reaches a max value of 0.053@1064 nm among AGS-like SICs, indicating it is a promising IR nonlinear optical (NLO) material. Theoretical calculations reveal that the π -conjugated (S 2 ) 2− units and covalent Ga S layers favor the enhanced birefringence and large SHG response. This work provides not only a new type of SIC for the first time, but also new lights on the design of IR NLO materials.
研究领域:
材料科学
·
光学
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PubMed
高影响因子
CELL RESEARCH
·
2021
·Vol. 31
·期 10
·1047-1060
·
IF 25.617
Hu Wei,Zhang Yong,Fei Panyu,Zhang Tongtong,Yao Danmei,Gao Yufei,Liu Jia,Chen Hui,Lu Qiao,Mudianto Tenny,Zhang Xinrui,Xiao Chuxuan,Ye Yang,Sun Qiming,Zhang Jing,Xie Qi,Wang Pei-Hui,Wang Jun,Li Zhenhai,Lou Jizhong,Chen Wei
The outbreak of SARS-CoV-2 (SARS2) has caused a global COVID-19 pandemic. The spike protein of SARS2 (SARS2-S) recognizes host receptors, including ACE2, to initiate viral entry in a complex biomechanical environment. Here, we reveal that tensile force, generated by bending of the host cell membrane, strengthens spike recognition of ACE2 and accelerates the detachment of spike’s S1 subunit from the S2 subunit to rapidly prime the viral fusion machinery. Mechanistically, such mechano-activation is fulfilled by force-induced opening and rotation of spike’s receptor-binding domain to prolong the bond lifetime of spike/ACE2 binding, up to 4 times longer than that of SARS-S binding with ACE2 under 10 pN force application, and subsequently by force-accelerated S1/S2 detachment which is up to ~10 3 times faster than that in the no-force condition. Interestingly, the SARS2-S D614G mutant, a more infectious variant, shows 3-time stronger force-dependent ACE2 binding and 35-time faster force-induced S1/S2 detachment. We also reveal that an anti-S1/S2 non-RBD-blocking antibody that was derived from convalescent COVID-19 patients with potent neutralizing capability can reduce S1/S2 detachment by 3 × 10 6 times under force. Our study sheds light on the mechano-chemistry of spike activation and on developing a non-RBD-blocking but S1/S2-locking therapeutic strategy to prevent SARS2 invasion.
研究领域:
病毒学
·
分子生物学
·
生物物理学
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高影响因子
Inorganic Chemistry Frontiers
·
2025
·Vol. 12
·期 23
·7706-7715
·
IF 6.4
Jingdong Yan,Xiangran Kong,Shichao Cheng,Tao Liu,Hongwei Leng,Yunfei Shang,Zuotao Lei,Chunhui Yang
Birefringent crystals, capable of modulating the polarization state of light, play a critical role in laser technologies such as communication and quantum optics. Despite remarkable progress in commercial birefringent crystals across the ultraviolet to near-infrared spectrum, the design of novel mid- and far-IR (MFIR) birefringent crystals faces fundamental challenges from inherent infrared absorption and poor optical anisotropy in these wavelength ranges. To address this, the first compound Ba2La2Sb4S10(S2) in the Ba–La–Sb–S system was successfully synthesized, driven by the stereochemically active lone pair (SCALP) effect. Ba2La2Sb4S10(S2) has a medium band gap (1.86 eV) and exhibits large birefringence (0.53 at 1064 nm). IR and Raman spectra confirm its broad transmission range (1–14 μm) with negligible absorption, demonstrating its suitability for MFIR optical devices. Furthermore, detailed analysis of the structure–property relationship, derived from first-principles calculations, reveals that the strong SCALP effect of Sb3+ in the structure significantly enhances the birefringence. This study not only provides a highly promising MFIR birefringent crystal but also validates the effectiveness of the SCALP-driven design strategy in the design of high-performance infrared birefringent materials.
研究领域:
材料科学
·
光学
·
无机化学
·
凝聚态物理
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2017
·
IF 6.065
Zheng-Zhe Zhang,Jia-Jia Xu,Zhi-Jian Shi,Ya-Fei Cheng,Zheng-Quan Ji,Rui Deng,Ren-Cun Jin
Previous studies investigating the risk of engineered nanoparticles (NPs) to biological wastewater treatment have primarily tested NPs individually; however, limited data are available on the impact of NPs on the anaerobic ammonium oxidation (anammox) process. In this study, the toxicity of CuNPs on anammox granules was investigated individually and in combination with CuONPs or ZnONPs. Exposure to CuNPs at 5 mg g −1 suspended solids (SS) decreased the anammox activity to 47.1 ± 8.5%, increased the lactate dehydrogenase level to 110.5 ± 3.4% and increased the extracellular N 2 H 4 concentration by 16-fold but did not cause oxidative stress. The presence of CuONPs or ZnONPs at 5 mg g −1 SS did not significantly aggravate or alleviate the toxicity of the CuNPs; however, the introduction of EDTA or S 2− could attenuate the adverse effects of the CuNPs, CuONPs and ZnONPs on the anammox granules. EDTA captured Cu ions, whereas S 2− shielded and deactivated Cu ions and passivated CuNPs. Therefore, our results indicated that the toxicity of NPs was dependent on the amount of active metal reaching the anammox cells. Overall, the results of this study have filled knowledge gaps and provided insights into the combined toxicity of NPs on anammox biomass.
研究领域:
环境工程
·
微生物学
·
水处理技术
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PubMed
高影响因子
INORGANIC CHEMISTRY
·
2026
·Vol. 65
·期 31
·18314-18324
·
IF 4.6
Zhu Lingfeng,Chen Hao,Liu Xinyue,Shen Quanyi,Yang Suyu,Pu ZeRui,Liu Lizhong,Wu Huifang
Stable
fluorescent sulfur quantum dots (SQDs) were generated directly
through a one-step process via S 2– -mediated regulation
(SMR) of residual polysulfides present in analytical-grade sodium
thiosulfate, eliminating the need for the conventional acid-induced
formation of elemental sulfur from sodium thiosulfate. During this
process, S 2– not only hydrolyzes to produce OH – , which promotes the cleavage of sulfur chains in the
residual polysulfides, but also rapidly captures the generated elemental
sulfur and converts it into abundant polysulfides. These polysulfide
intermediates subsequently undergo nucleation and structural reorganization,
ultimately yielding highly stable SQDs enriched with surface negative
charges. Steady-state and transient fluorescence spectroscopy reveals
that the SQDs produced via SMR (denoted as S 2– -SQDs)
exhibit a quantum yield of 11.13% and a fluorescence lifetime of 9.24
ns, together with significantly enhanced long-term photostability
compared with SQDs prepared under alkaline regulation alone. Furthermore,
the S 2– -SQDs enable rapid and selective fluorescence
sensing of bilirubin, with a detection limit as low as 0.23 μM.
This work provides new mechanistic insights into the fabrication of
stable sulfur-based quantum emitters. More importantly, it highlights
the often-overlooked role of residual sulfur species in commercial
reagents and underscores their substantial contribution to the formation
and luminescence behavior of SQDs.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Jie Yang,Huan Zhou,Jie Li,Cunbing Xu,Yifan Li,Sifan Wang,Jiangbo Chen
The solid–liquid phase equilibria of the Ba2+//Cl–, S2–, and OH––H2O quaternary system and its three subternary systems at 298.15 K are studied via the isothermal solubility phase equilibrium method. The solubility data, liquid properties of density and pH, and phase diagrams of the ternary and quaternary systems are obtained. Solid species of Ba(OH)2·8H2O, BaCl2·2H2O, Ba(OH)Cl·2H2O, and BaS exist in the quaternary system and corresponding ternary systems at 298.15 K. The four solid species build up two invariant points, one disproportionate and one proportionate, and four phase regions. The largest phase area is covered by Ba(OH)·8H2O, and the lowest water point is the proportionate invariant point saturated by BaCl2·2H2O, Ba(OH)Cl·2H2O, and BaS.
研究领域:
化学
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）