JOURNAL OF MOLECULAR LIQUIDS
·
2018
·
IF 4.513
Guo Lin,Shixing Wang,Libo Zhang,Tu Hu,Jinhui Peng,Song Cheng,Likang Fu
In this study, corn bract was modified with thiosemicarbazide (TSC-CCB) and used to selectively adsorb Au(III) from aqueous solutions. FT-IR spectroscopy, Scanning electron microscope and X-ray photoelectron spectroscopy were used to characterize TSC-CCB and investigate the adsorption mechanism. The results suggested that the maximum adsorption amount of Au(III) was 1470.22 mg/g at 25 °C with pH of 6.0. The adsorption isotherm and kinetic data were matched adequately with Langmuir model and pseudo-second-order model, respectively. Meanwhile, TSC-CCB presented a good selectivity for Au(III) from the competitive ions. The ion exchange and chelation between Au(III) and S/N groups played an important role in the enhancement of the adsorption capacity. The regeneration experiments suggested that the TSC-CCB retained high adsorption efficiency after three cycles. TSC-CCB was a promising adsorbent for recovery Au(III) from wastewater in the view of sustainability.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR RESEARCH
·
2017
·Vol. 25
·期 12
·1153-1157
·
IF 1.405
Li Yanyan,Yin Mingying,Yan Ying,Wang Ce,Liu Xincai,Chao Danming
Electrochromic materials have attracted much attention due to their potential in intelligent applications. We report here the preparation of a crosslinked electrochromic polyurea containing oligoanilines and silicon groups (PUOSi), which shows good thermostability and interesting spectral properties. The crosslinked network structure (c-PUOSi) could be accomplished easily by virtue of hydrolysis reaction. The reversible electrochemical activity and improved electrochromic behavior have been disclosed through multiple electrochemical techniques coupled with UV-Vis spectroscopy. The stability of c-PUOSi film in the electrochemical switching measurements has been effectively enhanced through the crosslinking reaction of triethoxysilane end groups, whilst the resulting densified electroactive film shows low response speed during the electrochemical process. Our demonstrated system presents a deep understanding of structure-function relationship, which is a vital implication for the fabrication and application of the electrochromic devices.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 11
·2844
·
IF 5.076
Zheng Lu,Hu Zhou,Chao Ye,Shi Chen,Jinyan Ning,Mohammad Abdul Halim,Sardor Burkhanovich Donaev,Shenghao Wang
Iron pyrite is a cheap, stable, non-toxic, and earth-abundant material that has great potential in the field of photovoltaics. Electrochemical deposition is a low-cost method, which is also suitable for large-scale preparation of iron pyrite solar cells. In this work, we prepared iron pyrite films by electrochemical deposition with thiourea and explored the effect of sulfurization on the synthesis of high-quality iron pyrite films. Upon sulfurization, the amorphous precursor film becomes crystallized iron pyrite film. Optical and electrical characterization show that its band gap is 0.89 eV, and it is an n type semiconductor with a carrier concentration of 3.01 × 1019cm−3. The corresponding photovoltaic device shows light response. This work suggests that sulfurization is essential in the electrochemical preparation for fabricating pure iron pyrite films, and therefore for low-cost and large-scale production of iron pyrite solar cells.Keywords:iron pyrite;electrochemical deposition;thiourea;sulfurization
研究领域:
材料科学
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光伏技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Xiaoqing Yang,Huimin Xiang,Jianying Huang,Chuan Zhou,Ran Ran,Wei Wang,Wei Zhou,Zongping Shao
Lead-free inorganic Cs 2 AgBiBr 6 double perovskites have emerged as promising materials in perovskite solar cells (PSCs) to tackle the inferior stability and toxicity issues of organic–inorganic hybrid PSCs. However, the power conversion efficiencies (PCEs) of Cs 2 AgBiBr 6 solar cells are remarkably restricted by the intrinsic and extrinsic defects of Cs 2 AgBiBr 6 films. More specifically, the fast crystallization process in the formation of Cs 2 AgBiBr 6 films strongly prevents the homogeneous growth of perovskite crystals, leading to inferior Cs 2 AgBiBr 6 film quality. This work introduces a facile strategy to retard the crystallization of Cs 2 AgBiBr 6 perovskites by introducing Lewis base additives into the precursor solution. The incorporation of a strongly coordinated thiourea additive with a sulfur donor leads to the generation of a Lewis acid base adduct, which retards the crystallization process for Cs 2 AgBiBr 6 crystals, improves the quality of the Cs 2 AgBiBr 6 film, decreases the defect density and inhibits charge carrier recombination. After optimization, the cell delivers a superior PCE of 3.07%, surpassing that reported for most Cs 2 AgBiBr 6 -based solar cells in the literature, and exhibits outstanding stability with a PCE retention rate of 95% after 20 days of storage in air. This work provides an effective strategy for further improvements in the performance of inorganic lead-free Cs 2 AgBiBr 6 -based photovoltaic cells .
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Shanjian Li,Zekun Wang,Haoxuan He,Panfeng Wu
Pitting corrosion is a significant issue which significantly shorten the service life of carbon steel. In this study, imidazoline and thiourea are combined to assess the synergistic in the localized corrosion of Q235 carbon steel by a combined system. In detail, five different proportions of corrosion inhibitors are used in the simulated corrosion solution (5 wt. % NaCl + 0.5 wt. % CH 3 COOH + 1.0 wt. % Na 2 S) in the closed area to investigate the corrosion inhibition performance of Q235 steel at 80 °C. The corrosion behavior of the steel in the simulated solution was investigated using potentiodynamic polarization test and electrochemical impedance spectroscopy test. Due to the combination of imidazoline (IM) and thiourea (TU) corrosion inhibitors, the corrosion inhibitors in the simulated solution of the occlusion zone reduce the migration of corrosive anions to the occlusion zone and slowed the acidification of the solution resulting in lower concentrations of Cl - and S 2- to varying degrees and reaching a higher pH of the solution. As a result, the compounded corrosion inhibitors exhibit improved corrosion inhibition rate (80 mg/L IM+20 mg/L TU (86.91 %), 50 mg/L IM+ 50 mg/L TU (95.67 %), 20 mg/L IM+ 80 mg/L TU (86.16 %)) to Q235 steel, which is superior to that using imidazoline (63.42 %) or thiourea (92.77 %) alone. This enhanced performances fully prove the synergistic effect of imidazoline with thiourea.
研究领域:
材料科学
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腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2024
·
IF 9.5
Lu Qianqian,Xu Xinxin,Qu Aihua,Liu Liqiang,Li Yuzhe,Sun Maozhong,Xu Chuanlai,Kuang Hua
Herbicide residues in agricultural products can have adverse effects on the environment and human health, therefore, there is an urgent need to establish a sensitive, rapid, and wide-ranging detection method. In this study, haptens of phenylurea herbicides (PUs) and sulfonylurea herbicides (SUs) were analyzed and designed based on computational simulation techniques, and two high-performance broad-spectrum monoclonal antibodies against PUs and SUs were prepared. On this basis, a multi-colloidal gold immunochromatography assay (multi-CGIA) was developed to simultaneously detect 13 herbicides in wheat. The visual limit of detection (vLOD) for PUs including diuron, chlortoluron, neburon, chlorbromuron, and linuron was 1–2 µg/kg. The vLOD for SUs including metsulfuron methyl, ethametsulfuron-methyl, sulfometuron-methyl, tribenuron methyl, cinosulfuron, triasulfuron, chlorimuron-ethyl, and chlorsulfuron was 2–10 µg/kg. The results of real sample determination indicated that the multi-CGIA is accurate, stable, and reliable, and adaptable to on-site preliminary screening of actual samples.
研究领域:
分析化学
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环境科学
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农业科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMER SCIENCE
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2021
·Vol. 59
·期 9
·764-774
·
IF 0
Fang Ge,Qun Zhang,Xiaowu Wang
The tetrabutylammonium salts of ionic organo-initiator containing N,N' -diisopropylthiourea (TUA-1) or N,N' -diethylthiourea (TUA-2) serve as inexpensive initiators for the anionic polymerization of methyl methacrylate (MMA) at room temperature. The molecular weights of obtained polymers are in the range of 1500–22,700 g mol −1 and the molecular weight distributions are fairly broad ( Đ = 1.9–2.5) in optimized cases. The molar ratio of monomer to initiator can be achieved up to 800. Side-reactions, for example, backbiting, transfer reactions result in the polymerization being a non-living manner, thus leading to broad molecular weight distributions of the resulting polymers. The effects of counterion nature were also studied from the polymerization of MMA using TUA-1 anion with sodium or potassium salts as counterions under identical conditions. Detailed investigation indicates that the polymerization proceeds via a sulfur anion initiated repeated 1,4-Machael addition. In general, thioimidate initiators induced MMA polymerization feature certain induction periods, which is ascribed to slow addition thioimidate to CC double bond of MMA as a result of low initiator efficiency. Graphical
研究领域:
高分子化学
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材料科学
✓ 已验证
产品关联
DOI
RSC Advances
·
2016
·Vol. 6
·期 109
·108028-108033
·
IF 3.289
Yu-Ling Liu,Zhongxia Wang,Xiang-Bin Han,Yu-Ling Sun,Donald E. Pryor
A new thiourea-based supramolecular compound (TA)[(TU)2Cl] (1, TA = thiazolium, TU = thiourea) has been successfully synthesized and systematically characterized, including differential scanning calorimetry (DSC), variable-temperature structural analysis and dielectric measurements. 1 undergoes a structural phase transition at 213.7 K (Tc), accompanied by distinct switchable dielectric anomalies. The TA cation is disordered over four equivalent positions above the Tc and becomes less-disordered over the two equivalent positions below the Tc. The structural relative disorder-order transition of the TA cation contributes to the switching of the dielectric constant between high- and low-dielectric states. Supramolecular inclusion compounds designed with dynamic components have been proved to be a good strategy for searching for new phase transition and switchable dielectric materials.
研究领域:
材料科学
·
晶体学
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2022
·
IF 7.72
Zhe Li,Hongyu Ma,Hongpeng Zheng,Zhong Li,Fandi Meng,Rui Liu,Emeka E. Oguzie,Li Liu
A coating with both anti-corrosion function and antibacterial ability was developed by means of urea-formaldehyde resin self-assembly. The self-assembled urea-formaldehyde microspheres on basalt facilitate the formation of a good adhesion filler/coating matrix interface, which effectively promoted the corrosion resistance of the coating. Serving degradation of chemical bonds in urea-formaldehyde cause release of formaldehyde as a bactericide on the EBUF coating, thus imparting antimicrobial activity against PAO1 , B.l , and SRB , as observed. The EBUF composite coating thus exhibits combined anticorrosion and antimicrobial activity, suitable for corrosion control in severe environments.
研究领域:
材料科学
·
生物学
✓ 已验证
DOI
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2025
·
IF 6.1
Fan Gao,Lingyun Zhu,Fan Zhang,Meng Li,Hairong Lian,Sen Feng,Xinfeng Cheng,Xianling Xiang
Metformin (MET) and its metabolite guanylurea (GUA) are prevalent in aquatic environments, raising concerns about their potential risks to aquatic organisms. However, the toxicity of these compounds through different exposure routes has not been reported. This study evaluated the effects of MET and GUA on the growth of the green algae Tetradesmus obliquus and on life table parameters of the freshwater rotifer Brachionus calyciflorus through various exposure routes, including waterborne, foodborne, and combined waterborne + foodborne. Our results indicated that both MET and GUA, at concentrations of 1 mg/L and 100 mg/L, inhibited algae growth, with GUA causing greater stress than MET. Additionally, compared to waterborne exposure, foodborne and combined waterborne + foodborne exposures of MET and GUA at these concentrations significantly decreased the net reproductive rate (R 0 ), intrinsic rate of population increase (r m ), and life expectancy (e 0 ) of B. calyciflorus . Notably, the impact of exposure routes on the life table parameters of B. calyciflorus was generally greater than the impact of exposure concentrations. Therefore, previous studies focusing solely on waterborne exposure may have underestimated the toxicity of MET and GUA.
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
Nanomaterials
·
2018
·Vol. 8
·期 12
·1015
·
IF 3.504
Liangfeng Zhang,Simin Liu,Yuhua Wang,Haijun Zhang,Feng Liang
A series of gold nanoparticles (AuNPs) was prepared in situ with different cucurbit[n]urils (CB[n]s) in an alkaline aqueous solution. The nanoparticle sizes can be well controlled by CB[n]s (n=5,6,7,8) with different ring sizes. The packing densities of CB[5–8] and free surface area on AuNPs were determined. A direct relationship was found between the ring size and packing density of CB[n]s with respect to the AuNP-catalyzed reduction of 4-nitrophenol in the presence of NaBH4. The larger particle size and higher surface coverage of bigger CB[n]-capped AuNPs significantly decreased the catalytic activity. Furthermore, this work could lead to new applications that utilize AuNPs under an overlayer of CB[n]s for catalysis, sensing, and drug delivery.Keywords:gold nanoparticles;cucurbit[n]urils;controllable synthesis;catalysis
研究领域:
化学
·
材料科学
·
催化
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Minqiang Xia,Yulu Ye,Tuo Li,Yunbo Li
Gold nanoparticles (AuNPs) have outstanding catalytic properties, whereas their broader application is hindered by limited charge transport and stability. In this work, we present a simple and rapid synthesis method for immobilizing AuNPs onto filters using polythiourea, aimed at facilitating charge transport and enhancing the catalytic conversion of 2-nitrophenol in aqueous solutions. The results show an obvious enhancement in the catalytic performance of the AuNPs when immobilized onto the filter paper with polythiourea, reducing the complete conversion time from 14 min to 150 s. The optimal addition amount of polythiourea is 5.0 mL. Additionally, the kinetics and recyclability of the system were investigated; it was observed that even after 15 cycles of testing, the catalytic complete conversion time of the AuNPs immobilized on the filter with polythiourea maintained consistently at 150 s. These findings suggest a promising strategy for extending the functional lifespan of AuNPs while offering a platform for catalytic reactions.
研究领域:
材料科学
·
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）