SENSORS AND ACTUATORS B-CHEMICAL
·
2015
·
IF 4.097
Guoxin Song,Chunli Xu,Baoxin Li
We report a method for visual differentiation between the l - and d -forms of mandelic acid (MA). It is based on the chirality of l -tartaric acid-capped gold nanoparticles ( l -TA-capped AuNPs, ca. 13 nm in diameter) that can be used as chiral selector for l - and d -forms of MA. On addition of l -MA to a solution of the l -TA-capped AuNPs, a color change from red to blue can be seen, while no color change is found on addition of d -MA. The chiral assay can be used to determine the enantiomeric excess of l -MA in the range from −100% to 100%. The effect can be detected with bare eyes and quantified by spectrophotometry. Notably, this method does not require the complicated chiral modification. The method excels by its sensitivity, low cost, good availability of materials, and its simplicity.
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Journal of Environmental Chemical Engineering
·
2023
·
IF 7.7
Jin He,Qintie Lin,Yanrong Luo,Yuxin Liu,Xindan Fan,Junli Zheng,Kehuan Xu,Yongjie Ma
In the context of the increasing global problem of arsenic (As) contamination in soils, an efficient remediation method is urgently needed to alleviate it. In this study, a composite washing agent consisting of 0.2 mol L −1 dithionite and 0.05 mol L −1 tartaric acid (TA) in a 1:1 mixing volume ratio was prepared and used in the remediation of arsenic-contaminated soils. The results showed that the removal efficiency of arsenic was 62.47% in soil 1 at a concentration of 134 mg kg −1 and 70.08% in soil 2 at a concentration of 70 mg kg −1 . Dithionite achieved greater release of the arsenic associated with amorphous hydrous oxides of iron and aluminium (F3) and arsenic associated with crystalline hydrous oxides of iron and aluminium (F4) forms of arsenic by the reductive dissolution of iron oxides , while also reducing Fe 3+ . TA released some arsenic in the specifically adsorbed (F2) and F3 forms through acidic effects. The mechanism of arsenic removal from the composite washing agent was found to be a synergistic effect between dithionite and TA. The TA complexation formed Fe-TA complexes with Fe 2+ in solution, preventing the formation of new iron mineral phases and reducing the readsorption or precipitation of arsenic to the soil surface. Meanwhile, the formation of Fe-TA complexes kept the iron oxides dissolved, allowing more iron oxide-bound arsenic (F3 +F4) to be released. This study showed that combining TA with dithionite is a promising technology for remediating arsenic-contaminated soils because of its high efficiency.
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CHINESE JOURNAL OF CATALYSIS
·
2026
·
IF 17.2
Linxiao Wu,Yumeng Han,Jinshui Cheng,Yushuai Sang,Xiang Chen,Yaqing Zhang,Xuewen Fu,Jingshan Luo
Cu 2 O is among the most promising metal oxide semiconductors for solar water splitting, yet its performance is often limited by structural defects and poor charge transport. Here, we report a tartaric acid-assisted solution growth strategy to fabricate high-quality Cu 2 O films (T-Cu 2 O) with reduced defect density, prolonged carrier lifetimes, and enhanced electrical conductivity. Microstructural analysis reveals that T-Cu 2 O films consist of vertically aligned columnar grains exceeding 1 μm in length, spanning the entire film thickness. This contrasts with the disordered grains formed in conventional lactic acid-assisted films (L-Cu 2 O), which impede charge transport. Upon integration with overlayers and RuO x cocatalysts, the T-Cu 2 O photocathode delivers a photocurrent density of 8.0 mA cm –2 at 0 V vs . RHE—23% higher than its L-Cu 2 O counterpart. Surface photovoltage measurements further confirm significantly improved charge separation in T-Cu 2 O. This work establishes a facile solution-based strategy for producing high-quality Cu 2 O photoelectrodes with enhanced efficiency for photoelectrochemical water splitting.
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HYDROMETALLURGY
·
2023
·
IF 4.7
Hongrui Xiang,Zhihui Yang,Xiaobo Min,Yanjie Liang,Cong Peng,Xiaoyun Liu,Rui Yuan,Qingwei Wang,Feiping Zhao
The recovery of germanium (Ge) from zinc residue leachate has attracted increasing attention. Herein, this study report on the development of a tartaric acid functionalized chitosan (TA-CS) material serving as an efficient adsorbent for Ge(IV). The introduction of TA resulted in abundant protonatable hydroxyl and carboxyl groups , which endows materials with excellent buffering capacity under acidic conditions. Adsorption kinetics and isotherms showed a fast and efficient adsorption capacity of 57.28 mg/g for Ge(IV). In binary systems, Ge(IV) was preferentially adsorbed over Zn(II), a major coexisting ion, with a separation factor of 3.22. The SEM–EDS FT-IR, XPS and DFT results revealed that mechanisms in combination, including electrostatic adsorption, complexation, hydrogen bonding, and ion exchange, promoted the immobilization of Ge(IV) on TA. The TA-CS material also exhibited great reusability with an adsorption efficiency of 70% after 3 recycles. For the recovery of Ge(IV) in practical zinc residue leachate, the TA-CS material showed superior affinity toward Ge(IV) and a 10-fold higher of adsorption capacity compared to that of pristine chitosan. Together, TA-CS demonstrates that it is a viable and economical material for the separation and preconcentration of Ge(IV) from zinc residue leachate.
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ENVIRONMENTAL POLLUTION
·
2018
·
IF 4.358
Jian Zhang,Wei Li,Ying Li,Lixiang Zhou,Yeqing Lan
Schwertmannite (SCH) has strong adsorption ability to As(III). However, there are few reports on the stability of SCH load with As(III) (SCH-As(III)). In this study, the effects of tartaric acid (TA), pH and coexisting ions including K + , Ca 2+ , Al 3+ and CO 3 2− on the photoreductive dissolution of SCH- As(III) and the release of the adsorbed As (III) were investigated. The results showed that under UV irradiation TA could greatly enhance the release of total Fe and total As from SCH-As(III). Nevertheless, the total Fe and total As in the solution decreased when TA was consumed up. Compared to SCH, the reductive dissolution of SCH-As(III) was obviously suppressed. In the dark, TA could slowly enhance the dissolution of SCH-As(III), but its effect on the release of adsorbed As(III) was weak. Low pH was conducive to the release of iron and arsenic. Ca 2+ , K + , and CO 3 2− promoted the decrease of the dissolved total Fe in the later reaction. However, Al 3+ inhibited the decrease of the dissolved total Fe and total As. The analyses of FTIR and XRD demonstrated that the mineralogical phase of SCH-As(III) after reaction changed. With light, the dissolved total Fe and total As existed mainly as Fe(II) and As(V), respectively. This is because Fe(II) was generated via ligand to metal charge transfer and As(III) was oxidized to As(V) by ·OH produced during the reaction. Thus, this study provides us with a comprehensive understanding of the stability of SCH-As(III) and the release of adsorbed As(III) in natural environments.
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PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2016
·
IF 2.74
Qian Tan,Yixin Leng,Jun Wang,Chunxiang Huang,Ye Yuan
The solubility data on solid–liquid equilibria (SLE) of racemic tartaric acid in ethanol + water mixtures were measured in the temperature range of (293.15 to 318.15) K at 0.1 MPa by acid–base titration method. In the binary solvent mixtures the solubility of racemic tartaric acid increases with rising temperature and decreases with increasing ethanol content. The modified Apelblat equation, λ h equation and CNIBS/R–K equations were applied to describe and predict the change tendency of solubility. Computational results show that the modified Apelblat equation is superior to the others. Furthermore, a predictive version of the NRTL model was proposed for the description of the non-ideality of the racemic tartaric acid–ethanol–water system. The predicted values were compared with the experimental data. The agreements are good. By using the van't Hoff equation the molar enthalpy, entropy and Gibbs free energy changes of solution were calculated. A linear ∆ sol H versus ∆ sol S compensation plot with a positive slope was obtained by means of enthalpy–entropy compensation effect.
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Nanoscale
·
2015
·Vol. 7
·期 38
·15915-15923
·
IF 7.394
Minghan Xu,Shusheng Xu,Zhi Yang,Mengjun Shu,Guili He,Da Huang,Liling Zhang,Li Li,Daxiang Cui,Yafei Zhang
The desired control of particle size, doping element composition, and surface structure of carbon dots (CDs) are vital for understanding the fluorescence mechanism and exploring their potential applications. Herein, nitrogen-doped CDs (N-doped CDs) have been synthesized with tartaric acid and various alkylol amines (monoethanolamine, biethanolamine and triethanolamine) under microwave irradiation. A systematic investigation was performed to characterize the N-doped CDs. It is found that with increasing nitrogen proportion, the fluorescent quantum yield and lifetime of N-doped CDs increases, whereas cell toxicity decreases. In other words, N-doped CDs synthesized by tartaric acid and monoethanolamine have the highest nitrogen content, the highest fluorescent quantum yield, the longest lifetime and the lowest cell toxicity. A corresponding mechanism has been proposed. Moreover, as-synthesized N-doped CDs have been applied for selectively detecting the Fe3+ ion and writing letters as a fluorescent ink.
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GREEN CHEMISTRY
·
2026
·
IF 9.2
Rutong Jiang,Bin Bian,Ruoyan Li,Qijun Wu,Daihui Zhang,Caoxing Huang,Chenhuan Lai,Mi Li,Qiang Yong
Developing a clean, efficient, and economically viable pretreatment strategy that enables the co-production of xylooligosaccharides (XOS) and fermentable sugars from woody biomass remains a major challenge in sustainable biorefinery. Although hydrothermal and dilute organic acid pretreatments are effective for XOS production, their ability to enhance subsequent enzymatic hydrolysis is often limited. Post- delignification treatments can improve saccharification, but they typically require large solvent inputs, resulting in environmental and economic burdens. Here, we present a green and facile Tween-assisted tartaric acid pretreatment that achieves both high yield of XOS and significantly enhanced enzymatic digestibility of birch. Under optimized conditions (0.4% tartaric acid, 0.5% Tween 80, 170 °C, 40 min), this process produced 43.2% XOS and enabled 77.7% glucose release from pretreated residues. Structural characterization revealed that Tween molecules etherify with lignin hydroxyl groups, reducing lignin hydrophobicity and enhancing cellulose accessibility of pretreated residues. Surface plasmon resonance, fluorescence quenching, and molecular docking analyses collectively confirmed that this in situ lignin modification mitigates the non-productive binding between enzyme and lignin, boosting enzymatic hydrolysis efficiency without an additional delignification step. This clean, low-cost, and scalable strategy effectively integrates the valorization of hemicellulose and cellulose in a single and sustainable process. Our study also offers molecular-level insights into surfactant-enabled lignin modification that could be widely deployed in the biorefining field.
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ACS Omega
·
2021
·
IF 3.512
Huichao Zhu,Jianjun Yang,Mingyuan Wu,Qingyun Wu,Jiuyi Liu,Jianan Zhang
A series of tartaric acid (TA) esters with different side chain lengths [dibutyl TA esters (DBTAE)-Cn], as plasticizers for poly(vinyl chloride) (PVC), is herein reported. Their structures have been fully characterized using proton nuclear magnetic resonance and Fourier-transform infrared spectroscopy. Their compatibility and plasticizing effect for soft PVC were evaluated using thermogravimetric analysis, dynamic mechanical analysis, tensile testing, and migration testing. The results showed that all these TA esters exhibit good plasticizing performance. At a concentration of 30 phr in PVC, the best results for the plasticizing effect, in terms of glass transition temperature reduction and elongation at break, were achieved when the ester DBTAE-C4 was used. However, the longer side chains of these esters improved the thermal stability of soft PVC blends yet exacerbated the migration behavior of these esters from PVC films in n-hexane. The properties of the plasticized PVC blends depended on the structural features of DBTAE-Cn. The plasticizing performances of the esters DBTAE-C1 and DBTAE-C4 rivaled that of dioctyl phthalate (DOP), suggesting that they have the potential to replace DOP in soft PVC materials.
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Journal of Materials Chemistry B
·
2020
·Vol. 9
·期 1
·125-130
·
IF 5.344
Huibo Wang,Fang Lu,Chongqing Ma,Yurong Ma,Mengling Zhang,Bo Wang,Yue Zhang,Yang Liu,Hui Huang,Zhenhui Kang
Gram-positive bacteria are one of the most common pathogens causing severe and acute infection, and hospital infection caused by Gram-positive bacteria have increased significantly. Also, as antibiotics have been widely used, abusing of antibiotics is becoming an increasingly serious problem which is followed by dangerous drug resistance. Here, we developed a series of cationic carbon dots (CDs) with high-performance as antibacterial agents by using tartaric acid and m-aminophenol as precursors. The surface charge of these CDs can be regulated from +4.5 ± 0.42 mV to +33.2 ± 0.99 mV by increasing the contents of pyridine N and pyrrolic N in CDs. Further antibacterial experiments show that 250 μg mL−1 of CDs with +33.2 ± 0.99 mV can selectively kill Gram-positive bacteria and the antibacterial efficiency can reach approximately >99%. These CDs with positive surface charge can be selectively absorbed on the cell walls of Staphylococcus aureus (S. aureus) via electrostatic interaction and then disturb their physiological metabolism, eventually leading to bacterial death. The present work provides a novel method to adjust the surface charge of CDs and apply these CDs as alternative antibacterial agents.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2023
·Vol. 31
·期 4
·6411-6424
·
IF 5.8
Li Yujia,Bi Erping
The interactions between organic pollutants and iron minerals play an important role in their environmental fate. In this study, the effects of low-molecular-weight organic acids (LMWOAs) on the adsorption and degradation of tetracycline (TC) on goethite were investigated. Tartaric acid (TA) was taken as the representative of LMWOAs to study the influencing mechanism through batch experiments and microscale characterization. In addition, the properties of TC-TA clusters under different pHs were determined by density functional theory (DFT) calculations. The results showed that all five LMWOAs inhibited TC adsorption and degradation. The preferential adsorption of TA on goethite changed TC adsorption from inner spherical to outer spherical complexation and mainly inhibited TC adsorption and degradation of the singly coordinated hydroxyl group. TC degradation rate decreased from 0.0287 to 0 h −1 in the first stage. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy results showed that TA could influence the interactions of amide groups, C = O on the A-ring, and dimethylamino group of TC with goethite, and the formation of ≡Fe(II) was inhibited. In addition to competing for the effective sites, the effects of complexation between TA and TC in solution should be considered. According to DFT calculations, hydrogen bonds could be formed between the carboxyl group of TA and the H atom of TC at different pH. These findings can provide evidence for estimating the contribution of adsorption and degradation to TC removal by iron oxides with the coexistence of LMWOAs in a soil–water environment. Graphical Abstract
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ENVIRONMENTAL TECHNOLOGY
·
2019
·
IF 1.918
Ying Li,Cheng Chen,Yao Wu,Yijie Han,Yeqing Lan
The synergism of CuS and tartaric acid (TA) in the reduction of Cr(VI) with an irradiation of simulated solar light was investigated through observing the effects of solution pH, temperature, CuS loading and TA concentration on the removal efficiency of Cr(VI). Approximately 32% and 54% of the initial Cr(VI) (100 µmol/L) were reduced within 180 min by TA and CuS with light, respectively. Under the same condition, however, almost a complete removal of the initial Cr(VI) was achieved within 130 min in the coexistence of CuS and TA. In the case, it is considered that Cr(VI) was rapidly reduced in two main pathways. One is that H2S produced from the dissolution of CuS in weak acidic solution directly reduced Cr(VI) to Cr(III). The other is that Cu(II) released from CuS reacted with TA to form complexes with photochemical activity, producing Cu(I) through ligand-to-metal electron transfer, and then the reduction of Cr(VI) was coupled with a conversion of Cu(I) to Cu(II). Thus, a cycle catalytic system was established for the reduction of Cr(VI). Moreover, it is observed that the reaction could be divided into two stages: the initial chemical reduction of Cr(VI) by H2S and the later photochemical reduction of Cr(VI) by Cu(II)–TA complexes.
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