INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2018
·
IF 3.141
Yuangong Zhang,Xin Wen,Yongqing Shi,Ru Yue,Libin Bai,Qingtao Liu,Xinwu Ba
Sulfur-containing polymer supported palladium nanoparticles (Pd/SPMB) were prepared by using the cross-linked poly(N,N′-methylene bis(acrylamide)) (SPMB) as the platform. The SPMB was synthesized via the reversible addition–fragmentation chain transfer (RAFT) polymerization, from which the sulfur inherently exists in the RAFT polymer due to the use of thiocarbonate as the chain transfer agent, and could be further utilized as a modifier of Pd nanoparticles. The Pd/SPMB showed size-dependent activity and selectivity in the semihydrogenation of alkynes to alkenes. The catalyst with an average Pd size of 5.3 nm was active in the semihydrogenation of both internal and terminal alkynes. Most of the surface of Pd NPs was covered (or poisoned) by sulfide and thiolate due to the moderate complexation strength between Pd NPs and SPMB, thus leading to the selectivity enhancement toward alkene. Furthermore, the catalyst was highly stable and can be reused 10 times without an appreciable loss in either activity or selectivity.
研究领域:
化学工程
·
材料科学
✓ 已验证
DOI
高影响因子
International Journal of Coal Preparation and Utilization
·
2024
·
IF 2
Yanrui Guo,Xiaogang Mu,Cunbao Deng,Hongfei Duan,Ling Qiao,Qianru Du,Peng Jing
Spontaneous combustion of coal is one of the main natural disasters in the process of coal mining, and spontaneous combustion of sulfur-containing coal is an urgent problem to be solved. In order to understand the influence of different sulfur structures and sulfur content on spontaneous combustion tendency of coal, the self-developed synchronous temperature compensation adiabatic oxidation experiment system was used to study the oxidation self-heating performance of a series of sulfur-containing “coal-like materials.” Through the analysis of the heating rate of coal containing specific sulfur structure, it is considered that the time of adiabatic oxidation temperature of different organic sulfur “coal” to rise to 70°C is dimethyl sulfoxide > phenylene sulfide > dibenzothiophene. By analyzing the oxidation temperature rise characteristics of organic sulfur models with different sulfur contents, it is believed that the higher sulfur content, the faster the low temperature oxidation reaction of “coal-like substance,” the faster the temperature rise rate, and the shorter the time to reach the uncontrollable self-heating temperature, so the shorter the spontaneous combustion period. In general, in the stage of low temperature oxidation, active sulfur containing small molecules (dimethyl sulfoxide) promote the oxidation temperature rise, stable structure, larger molecular weight of dibenzothiophene slow down the “coal-like” oxidation temperature rise.
研究领域:
矿业工程
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
HYDROMETALLURGY
·
2018
·
IF 3.3
Qiaoling Xie,Tao Lin,Fuming Chen,Dandan Wang,Bo Yang
Sulphur-containing chitosan, a water-soluble derivative of chitosan, was synthesized by using chitosan and other reagents. This sulphur-containing chitosan was combined with chitosan to recover ultra-trace palladium in HCl medium. The effects of the chelating dosages, pH, chelating precipitation rate, initial Pd concentration and coexisting cations were systematically investigated via chelating precipitation experiments. Under the optimized conditions, greater than 95% of palladium was recovered from the HCl medium, with pH ranging from 2 to 5.5 and proper dosages of chitosan and sulphur-containing chitosan, which were related to the concentration of Pd(II) ions. In addition, the presence of coexisting cations (Cu 2+ , Ni 2+ , Fe 2+ , and Sn 2+ ) had no effect on the recovery rate of palladium. The recovery mechanism of palladium by chitosan and sulphur-containing chitosan was studied via molecular weight analyses, elemental analyses, FT-IR analyses and XPS analyses. The proposed chelating precipitation method was successfully applied to the recovery of ultra-trace palladium in HCl medium.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ANALYST
·
2014
·Vol. 140
·期 2
·407-413
·
IF 3.906
Xiaoqiang Qiao,Yanjun Yang,Shijia Liu,Shiheng Chen,Xin Wang,Guangyue Li,Hongyuan Yan,Xun Yang
In this study, a novel type of pyridinium-based tags, 1-[3-[(2-iodo-1-oxoethyl)amino]propyl]-4-methylpyridinium bromide (IMP) and 1-[3-[(2-iodo-1-oxoethyl)amino]propyl]-4-propylpyridinium bromide (IPP), were designed, synthesized, and applied to the derivatization of thiol-containing peptides. With model peptides as the sample, the labeling efficiency and the stability of the peptide derivatives were investigated. The results indicate that nearly 100% derivatization yield was achieved with the developed tags and the peptide derivatives were stable at room temperature for at least one week. Furthermore, improved ionization efficiency and increased charge states were achieved via both matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MS) and electrospray ionization (ESI) MS, of which IPP exhibited the more obvious improvement of ionization efficiency. Further analysis of tryptic digests of bovine serum albumin (BSA) and α-transferrin, showed that increased identification efficiency of the thiol-containing peptides was achieved by combination with IMP or IPP derivatization. For example, the identification efficiency of the thiol-containing peptides of α-transferrin increased more than 42% upon combination with the IMP or IPP derivatives. We anticipate the novel tags are promising for highly efficient thiol-containing peptide identification in proteome research, especially for low concentrations.
研究领域:
生物化学
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蛋白质组学
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分析化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Shun Zhang,Shiyu Miao,Xiaoqiang An,Huachun Lan,Huijuan Liu,Jiuhui Qu
Heterogeneous process with low mass transfer rate is limited in the treatment of large-volume Ni-containing wastewater. The homogeneous reaction provides a promising strategy to solve this problem, but phase transition process of Ni 2+ removal and its potential impact on activated sludge system are rarely explored. Herein, the Ni 2+ removal efficiency and process were firstly investigated in detail by using S-containing reagent with dithioamino groups. When the dosage of reagent concentration was controlled at 5–10:1(Ni), Ni 2+ can be rapidly and completely removed within 1 min. Additionally, other coexisting Cu 2+ , Co 2+ , Cd 2+ , and Pb 2+ could be synchronously removed with more reagent adding, while the typical organics (e.g., humic/citric acid) in water and high concentration of chemical oxygen demand (3800 mg L −1 ) in actual wastewater, exhibited negligible inhibition for Ni 2+ capture. The phase transition was visually investigated by charge coupled device camera and paticle size change. Experimental characterizations demonstrate that the dithioamino groups in capture reagent could efficiently chelate with Ni 2+ , which can be validated by the theoretical calculations. Vitally, the utilization of reagent cannot affect the nitrification activity of aerobic sludge system through short-term experiment and 29 months of operation while ensuring total Ni removal efficiency. These findings highlight an opportunity for using S-containing organic reagents to remove heavy metal ions from actual wastewater, especially in the application of the sewage treatment plant with bulky water.
研究领域:
环境科学
·
污水处理
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2022
·
IF 5.895
Linhui Feng,Heping Cui,Pusen Chen,Khizar Hayat,Xiaoming Zhang,Chi-Tang Ho
An Amadori rearrangement product (ARP) derived from ribose (Rib) and glutathione (GSH) was prepared and identified as N-(1-deoxy-d-ribulos-1-yl)-glutathione by ultraperformance liquid chromatography–tandem mass spectrometry and NMR. Thermal treatment of the ARP aqueous solution was conducted, and a relatively high temperature was found to accelerate the degradation of the ARP. The concentration of furans formed at 120 °C was more than 6.39 times that at 100 °C, and especially, the high temperature favored the formation of furfural and 4-hydroxy-5-methyl-3(2H)-furanone through deoxyosone dehydration. The promoting role of extra-added GSH or its constituent amino acids was investigated in the volatile formation during thermal processing of the ARP. Both, the added GSH and its constituent amino acids, could timely capture glyoxal (GO) and methylglyoxal (MGO) to facilitate Strecker degradation, which improved pyrazine formation. Compared with glycine and glutamic acid, cysteine was the most effective extra-added amino acid to react with GO and MGO to produce pyrazine and methylpyrazine. More importantly, the cysteine degraded from extra-added GSH effectively accelerated the generation of sulfur-containing volatile compounds through the reaction of cysteine degradation products with furans and shorter-chain α-dicarbonyl compounds.
研究领域:
食品科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2023
·Vol. 41
·期 12
·1836-1845
·
IF 4.3
Li Wen-Jing,Pan Xiang-Qiang,Zhu Jian,Zhang Zheng-Biao
We present a ring-opening polymerization of bridged cyclic lactone utilizing alcohol as the initiator and organic base as the catalyst. Bridged γ -butyrolactone monomers (PhSGBL and PhSeGBL) were synthesized efficiently from commercially available 3-cyclohexene-1-carboxylic acid. Due to the ring strain of the bridged structure, ring-opening polymerization of this type of γ -butyrolactone derivative was successfully carried out under mild conditions, e.g. , using ethylene glycol as the initiator and a commercial catalyst [1,5,7-triazabicyclo [4.4.0 dec-5-ene (TBD)] as the catalyst at 30 °C. The obtained polymer could be degraded to its monomer for recycling in the presence of ZnCl 2 as a catalyst. PhSGBL and PhSeGBL could also be copolymerized with ε -caprolactone to tune the glass transition temperature. Additionally, the hydrophilicity of the obtained sulfur-containing polymers could be adjusted by selectively oxidizing the thioether side group to sulfone/sulfoxide, which offered a way to tune the hydrophilicity of polyester. On the other hand, the obtained selenium-containing compound could be degraded in the presence of m -CPBA (3-chloroperbenzoic acid), which offered potential application in sustained drug release.
研究领域:
材料科学
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2023
·
IF 3.8
Dong Yan,Jia Tan,Li Tang,Dong Chen,Liping Yuan,Zizhi Huang,Dongfang Zou,Qiang Tao,zhengde Tan,Jiyong Deng,Yunchu Hu
In order to obtain cotton fabrics with high efficiency flame retardance, a new ammonium phosphate type active flame retardant N, N -bis (ammonium phosphate) cysteine (NP-BG), which is nonleaching, covalent attached, durable, functional flame retardants, was synthesized by Mannich reaction and applied to the flame-retardant modification of cotton fabrics. Test results such as FTIR and XPS showed that cotton fabrics had been successfully grafted with NP-BG. The LOI of cotton fabrics treated with 30 % flame retardant was as high as 40.2 %, and after 50 washes, the LOI of cotton fabric was still as high as 28.8 %; demonstrating the durability of flame retardance. The thermogravimetric-infrared coupling (TG-FTIR) test results showed that the flame retardant could change the thermal decomposition pathway of cotton fabric and produce a large amount of residual carbon, thus reducing the decomposition of cotton fiber and the release of flammable gas. In addition, cone calorimetry (CONE) experiments showed that the total heat release (THR) and heat release rate (HRR) of cotton fabrics were significantly reduced after the flame-retardant treatment. These findings indicate that NP-BG is a new flame-retardant material with good application prospects.
研究领域:
材料科学
·
纺织工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Fanyun Chen,Chen Tian,Xuelin Pan,Qingshan Gao,Qingwei Wang,Liyuan Chai,Zhang Lin
Metallurgical sulfur-containing wastes (MSCWs) is an important secondary resource for recovering element sulfur in chemical and metallurgical industries. However, it is challenging to simultaneously achieve high recovery rate and sulfur purity, due to the multiple impurities combining with sulfur in these wastes. In this paper, we developed a novel method of pressure induced melting-crystallization to efficiently recover sulfur from MSCWs. The effects of condition parameters on the sulfur recovery rate and purity were optimized through response surface methodology. The single objective optimization results showed that the interaction between melting temperature and slurry concentration had a great influence on sulfur purity. The slurry concentration and pressure had great influence on sulfur recovery rate. The results of multi-objective optimization showed that under the conditions of pressure 1.2 MPa, slurry concentration 14.9% and melting temperature 140.9℃, the highest sulfur purity and recovery rate could reach 93.0% and 89.1% respectively. Mechanism investigation revealed that the high efficiency of sulfur recovery was ascribed to recrystallization of molten sulfur under the combined action of pressure and water, forming dense sulfur blocks and separating hydrophilic impurities. This work provides a new way to recover sulfur resources from MSCWs with sulfur content higher than 50%.
研究领域:
冶金工程
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2018
·Vol. 23
·期 2
·401
·
IF 3.098
Jun-Bo He,Hao Shi,Yue Wang,Xin-Lei Gao
To obtain novel structural antioxidants that have different antioxidant mechanisms, four 2-(alkylthio)-N-(4-(phenylamino)phenyl)acetamides2a–das dual functional antioxidants are designed, synthesized, and confirmed by1H-NMR, FTIR, MS, and elemental analysis. The antioxidant behavior of compounds2a–das additives of base oil triisodecyl trimellitate (TIDTM) is evaluated by non-isothermal and isothermal DSC analyses. The results showed all compounds can greatly increase the incipient oxidation temperature (IOT) and oxidation induction time (OIT) of TIDTM, especially, compound2cexhibited an OIT value of 72.5 min at 230 °C, which is almost 28 times the length of TIDTM. Moreover, compounds2a–ddo not affect the tribological performance of TIDTM. The mechanism of antioxidants involved an intramolecular synergism are proposed. This work demonstrates compound2ccan be used as a novel potential antioxidant additive of TIDTM; in addition, it would inspire the emergence of highly potent antioxidants with different antioxidant mechanisms.Keywords:sulfur-containing 4-aminodiphenylamine;dual functional antioxidants;antioxidant mechanism;intramolecular synergism
研究领域:
化学
·
材料科学
·
分析化学
✓ 已验证
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
·
2025
·
IF 6.3
Le Ma,Jun Nie,Xiaoqun Zhu
High-refractive-index (HRI) liquid monomers containing unsaturated acrylate double bonds possess advantages such as photocurability at room temperature and environmental friendliness. However, introducing acrylate groups often reduces the refractive index of monomers. Although small-molecule sulfur-containing structures have high refractive indices, their pungent odors restrict their applications. In this study, a series of sulfur-containing monomers have been successfully prepared through the optimized combination of sulfur elements, benzene rings, and acrylates. These monomers are in a liquid state, and the refractive index performance has reached an advanced level among photocurable monomers. Furthermore, the optical properties (refractive indices, transmittances), curing properties (double-bond conversion and rate of polymerization), and thermal stability (TGA) of the polymer films have been emphatically investigated. The polymer film has a refractive index of 1.648–1.672 at 589 nm, an Abbe number of 22.20–29.32, a transmittance of >90 % at 550–800 nm, a double-bond conversion of 70–92 %, and a maximum weight-loss rate (T max ) temperature of 354–363 ℃, glass transition temperature (T g ) of 45.91 °C–58.45 °C. It exhibits excellent optical properties, curing properties, and thermal stability, opening up new possibilities for the applications of HRI materials.
研究领域:
高分子化学
·
材料科学
·
光学材料
·
光固化树脂
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2024
·Vol. 17
·期 7
·1598
·
IF 3.1
Yongqi Liu,Shasha Chu,Yuebing Xu,Xinyu Chen,Hao Zhou,Jinlin Li,Yanjie Ren,Xintai Su
Upcycling Cr-containing sulfate waste into catalysts for CO2hydrogenation reaction benefits both pollution mitigation and economic sustainability. In this study, FeCrO3/Fe2O3catalysts were successfully prepared by a simple hydrothermal method using Cr-containing sodium sulfate (Cr-SS) as a Cr source for efficient conversion and stable treatment of Cr. The removal rate of Cr in Cr-SS can reach 99.9% at the optimized hydrothermal conditions. When the synthesized catalysts were activated and used for the CO2hydrogenation reaction, a 50% increase in CO2conversion was achieved compared with the catalyst prepared by impregnation with a comparable amount of Cr. According to the extraction and risk assessment code (RAC) of the Reference Office of the European Community Bureau (BCR), the synthesized FeCrO3/Fe2O3is risk-free. This work not only realizes the detoxification of the Cr-SS but transfers Cr into stable FeCrO3for application in a catalytic field, which provides a strategy for the harmless disposal and resource utilization of Cr-containing hazardous waste.
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）