BIORESOURCE TECHNOLOGY
·
2022
·
IF 11.889
Hong Liao,Wenjun Ying,Zhina Lian,Yong Xu,Junhua Zhang
Acid salts have been shown to catalyze xylan hydrolysis selectively and efficiently for xylooligosaccharides (XOS) production while using acid salts that are non-toxic and available as feed additives can avoid separation from resulting XOS-rich hydrolysates. There is no report on XOS production with sodium bisulfate (NaHSO 4 ) hydrolysis, of significance is that NaHSO 4 as feed additive does not need to be separated. In this work, NaHSO 4 hydrolysis was firstly employed to produce XOS from poplar. XOS yield of 42.7% was reached under optimal conditions of 0.04 mol/L NaHSO 4 , 170 °C and 60 min. After hydrogen peroxide/acetic acid and sodium hydroxide treatments of NaHSO 4 -pretreated poplar, high yields of glucose (92.0%) and xylose (91.3%) were obtained at a low cellulase dose of 5 FPU/g dry mass. NaHSO 4 hydrolysis was a novel strategy to prepare XOS efficiently with simple operation steps, and XOS-rich hydrolysates could be potentially used as feed additives without NaHSO 4 separation.
研究领域:
生物化学
·
可再生资源与环境工程
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DOI
PubMed
高影响因子
SYNTHETIC COMMUNICATIONS
·
2017
·
IF 1.134
Haifei Zhang,Fengfan Zhu,Yuan Xu,Xiaoxiang Zhang,Xinbao Zhu
The synthesis of several ricinoleic acid glycol ether esters by high-pressure microwave radiation is described. Ricinoleic acid which is from castor oil reacted fastly with glycol ethers in the presence of NaHSO4 · H2O and dichloromethane (DCM) in special microwave reactor. The influences of reaction factors such as catalyst and solvent type, reaction temperature, and time were investigated and the optimal reaction conditions were obtained. The activity of catalyst had a higher performance up to the 10th cycle and the excellent values of turnover numbers and turnover frequency were obtained. Compared with the traditional esterification in reflux heating systems., the microwave-assisted process has many advantages such as shorter reaction time, less side effects, higher yield, which is a great potential for the development of green chemistry.
研究领域:
有机化学
·
绿色化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2020
·
IF 5.774
Ruyan Dou,Hao Cheng,Jianfeng Ma,Yong Qin,Yong Kong,Sridhar Komarneni
A novel catalytic system was developed by activating NaHSO 3 with CoO nanoparticles for methylene blue (MB) degradation. The CoO nanoparticles were synthesized by a facile one-pot hydrothermal method followed by calcination . The crystallinity, morphology and elemental valence of the CoO were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS), respectively. MB degradation rates of 91.5% in one minute and 99.4% in six minutes were obtained using the CoO/NaHSO 3 system, which may provide a more cost-effective and efficient way for decomposition of dye pollutants. The well-known classical quenching tests were used to investigate the free radicals involved in MB degradation along with electron paramagnetic resonance (EPR) spectra, the latter further confirmed the types of free radicals. Sulfate and hydroxyl radicals were proposed to be responsible for the excellent dye degradation achieved with the new CoO/NaHSO 3 system.
研究领域:
环境科学
·
材料科学
·
催化化学
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产品关联
DOI
高影响因子
AICHE JOURNAL
·
2022
·Vol. 69
·期 2
·e17898
·
IF 4.167
Xu Li,Jiaqi Li,Zhengze Jia,Lijun Yang,Jinxiang Dong
A new series of bio-based sulfonate gemini surfactants was synthesized through esterification of renewable linoleic acid with various alcohols and subsequent sulfonation with readily available sodium hydrogensulfite (NaHSO 3 ). Organocatalytic sulfonation of methyl linoleate with NaHSO 3 by the triethylamine and tert -butyl peroxybenzoate catalyst system was investigated, where a methyl linoleate conversion of 96.4% could be achieved while generating high purity product without tedious purification. Three resulting sodium alkyl linoleate disulfonates (SALDs) have been characterized by Fourier transform infrared, high-performance liquid chromatography, LC–MS, high-resolution mass spectrometry (HR–MS), nuclear magnetic resonance techniques, and thermogravimetric analysis. The physicochemical properties and surface properties of the SALDs at various concentrations were investigated. The results showed that the SALDs exhibited low Krafft temperature, high water solubility, foam stability (foam half-life time could reach 15 min), emulsifying ability (emulsification time of 2.0 g/L is 192 s), and good thermal stability. This study enriches the family of anionic gemini surfactants and provides reference data for facile preparation of gemini surfactants.
研究领域:
有机化学
·
材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Yating Zhu,Xin Yang,Junlian Qiao,Xin Zhang,Xiaohong Guan
Bisulfite-activated permanganate oxidation (PM/BS) technology is an emerging oxidation process that can rapidly oxidize organic contaminants and degrade some permanganate-resistant organic contaminants. For the first time, the influences of PM/BS technology as a pre-oxidation process on the formation potentials of disinfection by-products (DBPFPs) during chlorination of humic acid (HA) solution and three natural water samples were investigated. The results revealed that PM/BS pre-oxidation only slightly affected the DBPFPs of HA in the absence of Br - although it changed the structure of HA according to the fluorescence characterization result. With the presence of Br - , PM/BS pre-oxidation enhanced the generation of trihalomethanes but inhibited that of nitrogenous DBPs (N-DBPs) during chlorination of HA. The toxic risk analysis showed that the toxicity of the generated DBPs from chlorinating HA solution without Br - only changed slightly after PM/BS pre-oxidation but it was decreased by 14% in the presence of 150 μg/L Br − due to PM/BS pre-oxidation. This should be associated with the inhibiting effect of PM/BS pre-oxidation on the generation of N-DBPs and several haloacetic acids in the presence of Br - . Because of the complex matrix of natural water samples, PM/BS pre-oxidation had minor influence on the amount and the potential toxicity of DBPs generated during chlorination. The above results suggested that PM/BS technology could be an alternative of the drinking water pretreatment.
研究领域:
环境科学
·
水处理工程
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Rongrong Han,Yijing Li,Houshen Li,Yanguang Song,Jilian Yu,Junling Duan,Shiyun Ai
Cellulose nanocrystals (CNCs) is extensively applied in bio-based biodegradable materials due to its unique properties. In this paper, an efficient oxidation method was proposed for the preparation of CNCs at mild reaction conditions (room temperature, 3 h) using a sodium bisulfite (NaHSO 3 ) activated potassium permanganate (KMnO 4 ) system. Subsequently, indoleacetic acid (IAA) modified CNCs (CNCI) were prepared by reacting CNCs with IAA, and the physical and chemical properties of CNCI were investigated by scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analyser (TGA) and X-ray photoelectron spectroscopy (XPS). The modification of CNCs broadened the applications of CNCs, and the incorporation of CNCI into pectin-based films improved the physical properties (including mechanical property, UV resistance, hydrophobicity) of pectin film (P). Besides, the obtained P-CNCI film showed good antibacterial property and it could be used for strawberry preservation. This study provided an efficient, environmentally friendly and economical method for the preparation and modification of CNCs, which showed potential applications in the manufacture of advanced functional materials.
研究领域:
材料科学
·
纳米技术
·
高分子科学
·
表面化学
·
食品包装
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
·
2019
·
IF 2.983
Yaohui Gao,Ziwei Hu,Jiamin Wu,Zan Ning,Jingyi Jian,Ting Zhao,Xiaochen Liang,Xingjie Yang,Zi Yang,Qinyu Zhao,Jianping Wang,Zhigang Wang,Nicoleta Elena Dina,Ana Maria Raluca Gherman,Zhengjin Jiang,Haibo Zhou
Palmatine is a protoberberine alkaloid separated from several plants and application as an anti-inflammatory and antibacterial agent in the therapy of gastrointestinal and genitourinary disorder. Thus, the fast quantification of palmatine is important in clinic medical assays. Herein, we report simple, fast and sensitive colorimetric visualization and surface-enhanced Raman spectroscopy (SERS) dual-mode detection of palmatine basing on bimetallic size tunable silver shell capped gold nanoparticles (Au@Ag NPs). Interesting, the best signals output for dual-mode sensing of palmatine were both 5 nm Ag shell thickness of Au@Ag NPs. Meanwhile, we found that the addition of NaHSO 4 significantly improves the aggregating sensitivity of Au@Ag NPs to trace palmatine. Upon exposure to 0.1 μM level palmatine, NaHSO 4 -optimized Au@Ag NPs solution exhibits a highly sensitive color change from orange to green and rapid aggregation kinetics within the initial 5 min, which can directly be seen with the naked eye and monitored by UV–vis absorbance spectra. In addition, we measured palmatine by SERS with the excellent enhancement effect of Au@Ag NPs for further increase the sensitivity and selectivity. More importantly, other protoberberine alkaloids do not interfere with this dual-mode sensor due to the different interaction force between Au@Ag NPs and these alkaloids, and the applicability of the sensor is well demonstrated in real samples with satisfactory results. This provide a fast and simple assay for the rapid detection of palmatine in traditional Chinese medicine, the limit of detection (LOD) is 0.13 μM by the naked eye and 0.10 μM by UV–vis spectroscopy. Therefore, the size-tunable of NaHSO 4 -optimized Au@Ag NPs can be used not only as a naked-eye sensor of palmatine, but also as a highly selective SERS probe.
研究领域:
纳米技术
·
分析化学
·
药学
·
中医药
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xuerui Bai,Maiqian Nie,Zhenjun Diwu,Lei Wang,Hongyun Nie,Yan Wang,Qiuyue Yin,Bo Zhang
2-Hydroxymuconic semialdehyde (2-HMS) is a useful intermediate in organic synthesis, but there are few reports for its preparation. 2-HMS accumulates in phenol-containing wastewater treated with Pseudomonas stutzeri N2. This work has studied the extraction of 2-HMS so that the phenolic wastes of high concentration may be used to produce 2-HMS. When 4.25 mmol/L phenol was degraded by Pseudomonas stutzeri N2, the accumulated 2-HMS can reach 3.79 ± 0.08 mmol/L within 30 h. A saturated solution of NaHSO 3 was added into the 2-HMS culture, and white rod-like precipitates formed gradually. Through SEM, XRD and FT-IR, the precipitates were identified as monoclinic hexagonal crystals of α-hydroxy sulfonate sodium with high purity. In the presence of NaOH, α-hydroxy sulfonate sodium could be reduced to the desired 2-HMS product. The optimized conditions were characterized to be 3 mol/L NaOH solution, 5 min and 50 °C. The conversion rate of α-hydroxy sulfonate sodium was up to 87.3 ± 0.2%, and 0.42 ± 0.02 mmol/L 2-HMS were obtained.
研究领域:
环境科学
·
生物技术
·
有机化学
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产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Mengjie Ma,Yi Zhang,Yujin Ji,Qi Shao,Kui Yin,Wenxiang Zhu,Junjun Yang,Fan Liao,Zhenglong Fan,Yang Liu,Youyong Li,Mingwang Shao,Zhenhui Kang
Poisoning species, such as methanol and air pollutants, degrade the electrocatalytic activity for oxygen reduction reaction (ORR). Here, via taking advantage of the varied electronic property of nano-silicon, a versatile strategy is reported for enhancing the catalytic activity and anti-poisoning ability toward ORR by decorating noble metal catalysts with the size-controlled silicon nanoclusters (DS). Consequently, DS-Pd exhibits the enhanced ORR performance with a large halfwave potential of 0.892 V and an onset potential of 1.010 V. More importantly, it also shows enhanced anti-poisoning performance in methanol, NaNO 2 and NaHSO 3 electrolytes, compared to those of commercial Pt/C and Pd/C catalysts. Mechanism studies reveal that the synergistic effect between Pd and more oxygen-philic and less poison-philic Si nanoclusters largely abbreviate the absorption of poisoning species on the active sites. This strategy also improves the methanol-tolerant performance of Pt based catalysts, providing a versatile strategy for the fabrication of methanol-tolerant ORR catalysts.
研究领域:
材料科学
·
电化学
·
催化
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2017
·
IF 2.625
Wenxi Xia,Jiangli Fan,Lizhu Zhang,Jingyun Wang,Jianjun Du,Xiaojun Peng
The dichromate as an industrial oxidant has a very extensive application. However, as one of the heavy metal elements, chromium has become a great threat to the organism and environment due to its carcinogenicity and mutageicity. So far, there is only a small number of detection and imaging methods for dichromate. In this work, a new fluorescent probe RhoCr for detecting dichromate based on in situ Cr 3+ -controlled opening of spirolactam-ring in a rhodamine dye after Cr 2 O 7 2− reduced to Cr 3+ by NaHSO 3 in solution and self-reduction in organism is reported, which displays a strong enhancement of fluorescence emission (λ em 582 nm), fast response (completed within 2 min) and excellent sensitivity (DL 1.18 nM). RhoCr successfully obtained fluorescence images of the intracellular Cr 2 O 7 2− . In addition, the effect have been exhibited in tap water and pool water, which will be crucial to the detection of dichromate in the environment.
研究领域:
分析化学
·
环境科学
·
细胞生物学
·
材料科学
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产品关联
DOI
高影响因子
FIBERS AND POLYMERS
·
2020
·Vol. 21
·期 6
·1229-1237
·
IF 1.797
Zhang Yiyi,Zhang Nan,Wang Qiang,Yu Yuanyuan,Wang Ping,Yuan Jiugang
Most modifications of wool focused on its surface due to the existence of the cuticle scales. For instance, chlorination, oxidation and protease treatments were used to break down or remove the scales. However, these modifications usually severely damaged the internal structure of wool. In this paper, a novel approach based on surface micro-dissolution was employed to modify the surface of wool to minimize the internal damage of wool, and improve the surface-related properties of wool. The micro-dissolution system used NaHSO 3 /urea to dissolve the scale layer of wool. After being micro-dissolved with NaHSO 3 /urea system, scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), fluorescence microscopy, Fourier transform infrared spectroscopy (FTIR), and the Allwörden reaction were utilized to characterize the treated wool. Furthermore, felting shrinkage, strength loss and wettability of the treated wool were determined. The results showed that NaHSO 3 /urea system could dissolve the scale layer from outside to inside. The fluorescence microscopic images further indicated that low concentration of NaHSO 3 /urea system can dissolve the surface of wool without the serious damage of internal structure. Moreover, the micro-dissolution system can be controlled to dissolve the scale layer on the surface of wool slightly by adjusting the reaction conditions. The presented method is simple, easy to operate, and economical, thereby can open up new directions for the surface modification of wool.
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
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2024
·
IF 1.9
Tianle Li,Shaocong Pang,Luo Zhao,Liangliang Yan,Xiuhua Zheng,Yuxiu An
During the drilling process, the hydration and expansion of shale are one of the main reasons for wellbore instability, which can lead to stuck drilling and economic losses. A novel shale inhibitor (ADG) was successfully synthesized by thermal polymerization using Acrylamide (AM), Dimethyl diallyl ammonium chloride (DMDAAC) and Graphene as raw materials, Ammonium persulfate, and Sodium bisulfite as initiators. In order to study the structural characteristics of ADG, Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), Thermogravimetric loss test (TG), and Scanning electron microscopy (SEM) test were conducted. Simultaneously, linear swelling test, mud making test, sedimentation test, contact angle test, and montmorillonite (MMT) impregnation test were conducted to evaluate its inhibitory performance. ADG can reduce the expansion height of bentonite test blocks from 6.4 mm to 2.06 mm. After adding ADG, the settling speed can be effectively accelerated, with a settling time of only 15 min and a settling height as low as 60 mm. SEM analysis revealed that ADG had a regular flake-like structure. Compared to conventional shale inhibitors, ADG can increase the contact angle of bentonite test blocks from 26.8° to 46.8°, improving their hydrophobicity. Mechanistic studies suggested that ADG molecules could adsorb on the shale surface and block surface pores, reducing the contact area between shale and water. Additionally, small ADG molecules could penetrate the pore interiors and form hydrophobic films. The dual mechanism of ADG, inhibiting hydration and providing physical blockage, further demonstrated its excellent inhibitory performance.
研究领域:
材料科学
·
化学工程
·
石油工程
·
地质学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）