ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
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2017
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IF 3.743
Xiuzhen Zhu,Yuan Gao,Qinyan Yue,Yujiao Kan,Wenjia Kong,Baoyu Gao
Potassium tartrate (C 4 H 6 K 2 O 7 ) was utilized as a novel activating agent to prepare activated carbon with relatively high specific surface area by using less activating agent and activation time from marine waste–green alga ( Enteromorpha prolifera ) for the first time. The influences of activation temperature, impregnation ratio and activation time on the pore structure were investigated to obtain the optimum conditions (activation temperature: 700 °C, impregnation ratio: 1:1, and activation time: 30 min). Meanwhile, the activation temperature was evaluated to be the essential factor that dominated the form of pore structure in activated carbon. The green alga-based activated carbon that was prepared under optimum conditions has shown the high surface area of 1692 m 2 /g and total pore volume of 1.22 cm 3 /g, which could be used as an effective adsorbent to remove chloramphenicol. The thermodynamic data of chloramphenicol were well fitted by Langmuir isotherm model and the green alga-based activated carbon has showed high adsorption capacity of 709.2 mg/g towards chloramphenicol.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
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2021
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IF 5.455
Daliang Guo,Dinggen Hu,Zhongyu Yan,Kangshuai Yuan,Lizheng Sha,Huifang Zhao,Jianbin Chen,Bei Liu
In order to study the property of lignin-based porous carbon activated by potassium tartrate, the effects of activator types, activator/lignin mass ratio and activation temperature on the surface morphology , specific surface area and pore size distribution of alkali lignin based porous carbon materials were systematically investigated. Meanwhile, the methyl orange adsorption capacity and adsorption kinetics of the lignin-based porous carbon were also evaluated. The N 2 adsorption-desorption experiment results showed that the specific surface area value of lignin-based porous carbon materials activated by potassium tartrate (APC-J), KOH (APC-K), and NaOH (APC-Na) are 947, 1113 and 762 m 2 /g, respectively. Meanwhile, APC-J has a special microporous structure, while the pore structures of APC-K and APC-Na are mainly mesopores . The best specific surface area of lignin-based porous carbon materials was 1911 m 2 /g obtaining from APC-J-2-8 sample (mass ratio 2:1, activation temperature 800 °C). The adsorption experiment of methyl orange (MO) showed that the adsorption kinetics of APC-J-2-8 conformed to the quasi-second-order kinetic model , mainly chemical adsorption . The isothermal adsorption process conforms to the Langmuir adsorption isothermal adsorption model, which is a single molecular layer adsorption, and the maximum adsorption amounts are 526.31 mg/g.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
Journal of the Taiwan Institute of Chemical Engineers
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2018
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IF 3.849
Xiuzhen Zhu,Yuan Gao,Qinyan Yue,Yan Song,Baoyu Gao,Xing Xu
Potassium tartrate as activator was used to produce porous carbon materials (PCMs) by activating petroleum cokes (PC), fallen leaves (FL), chicken feathers (CF) and Enteromorpha prolifera (EP) under the identical conditions (activation temperature of 750 °C, impregnation ratio of 2.5:1 and activation time of 1 h). Potassium tartrate can also be self-activated to facilely synthesize PCMs simultaneously. The PCMs synthesized through various precursors showed significant discrepancies in morphologies and the porous structure was characterized by SEM and N 2 adsorption–desorption isotherm. The BET surface areas of FL-PCM (1721 m 2 /g), CF-PCM (1819 m 2 /g), and EP-PCM (2151 m 2 /g) were larger than that of PC-PCM (256 m 2 /g) and the microporosity of EP-PCM (48%) was much lower than those of others. In addition, the adsorption properties of the four PCMs under various conditions were detected by selecting chloramphenicol (CAP) as a target adsorbate. The kinetics and isotherms of adsorption processes were well fitted by pseudo-second-order and Langmuir model for four PCMs. Meanwhile, EP-PCM exhibited high adsorption capacity of 892.86 mg/g.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
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2019
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IF 6.97
Kunming Li,Hua Gao,Xiuyan Ren,Guanghui Gao
The thermochromic materials have received widespread attention due to their ability to adjust color under the environmental stimuli. However, it is still a challenge in the sensitivity of transmittance on temperature. Here, a novel type of thermochromic hydrogel is proposed and demonstrated to improve the sensitivity of transmittance to temperature. At different temperatures, the size of the micelle could be changed, giving the thermochromic ability for the hydrogel. As the temperature gradually increases to the thermochromic transition temperature (TTT), the hydrogels undergo a transition from opaque to transparent (90%) at 550 nm visible radiation the same as the near-infrared region. The reverse process occurs when the temperature drops below TTT. Meanwhile, TTT could be adjusted over a range of temperature from 25 to 35 °C by changing the content of potassium tartrate hemihydrate. This hydrogel provides a new approach to obtain thermochromic materials and has wide potential application in temperature monitoring and optical control fields.
研究领域:
材料科学
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光学
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生物医学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Guangyan Tian,Xue Hua,Kailong Nie,Yan Li,Kefeng Zhang,Wenqian Qu,Hongyan Ren,Junping Meng
Iron ore tailing (IOT), as a typical solid waste, is in urgent need of high value-added utilization. The resource endowment and silicate composite characteristics owe IOT inherent potentials to prepare environmental functional materials. However, the Si-O-Si(M) bonds in IOT, having both ionic and covalent bonding properties, are very strong, which makes IOT difficult to efficiently utilize. Herein, sodium silicate, magnesium sulfate and potassium sodium tartrate (PST) were simultaneously introduced to promote the reconstitution of IOT as lamellar mesoporous Mg-containing silicate adsorbent. The adsorbents possess high specific area of 280.18 m 2 /g and abundant active sites, whose adsorption capacities for aflatoxin B 1 (AFB 1 ) and tetracycline hydrochloride (TC) were 30.05 mg/g, 217.39 mg/g, respectively. It is expected that the present work could lay a theoretical and experimental foundation for the high value-added functional utilization of IOT.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
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2023
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IF 4.3
Yang Gao,Kunming Li,Xiuyan Ren,Guanghui Gao
Graphical Hydrogels with gradient opaque-transparent transition thermochromic temperature from 5 °C to 53 °C were prepared and the accuracy was controlled at 1 °C. The thermochromic property was regulated by the aggregation state of sodium dodecyl sulfate micelles by adding potassium tartrate hemihydrate and cations. The thermochromic hydrogel can serve for smart window and temperature detector/monitor. In recent years, the thermochromic hydrogel was acted as suitable sandwiching material to adjust light transmission. However, to accurately control the thermochromic temperature in a wide range still was a significant challenge. Here, a simple method was explored to prepare hydrogels with gradient opaque-transparent transition thermochromic temperature from 5 °C to 53 °C, which was regulated by the aggregation state of sodium dodecyl sulfate micelles by adding potassium tartrate hemihydrate and cations. Using Li + , Na + , and K + as cations, the accuracy was controlled at 1 °C. Moreover, the transmittance of the hydrogel was not changed when the thermochromic temperature was adjusted. As a result, an intelligent window was fabricated by utilizing thermochromic hydrogel as a sandwiching layer into the outer glass layers, which could effectively and stably regulate the visible and infrared light. The temperature monitors/detectors were also designed, which showed excellent temperature monitoring/detecting ability. Therefore, this low-cost, high-efficient, large-scale prepared thermochromic hydrogel provided more potential for intelligent temperature devices.
研究领域:
材料科学
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化学
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工程
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产品关联
DOI
PubMed
高影响因子
Small
·
2026
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IF 11.8
Hengzhuo Cai,Junfeng Lin,Wanyang Lyu,Lingyi Yi,Xubing Lu,Xingsen Gao,Jun-Ming Liu,Sujuan Wu
All-inorganic CsPbI 3 perovskite solar cells (IPSCs) are regarded as promising candidates due to their ideal bandgap and excellent thermal stability. However, their practical application is hindered by phase instability and severe interfacial defects, which lead to performance degradation and poor durability. Here, this work proposes a low-temperature synergistic regulation strategy that combines oxamide additive with potassium tartrate interfacial modification to simultaneously optimize interface and adjust bulk crystallization process of CsPbI 3 film. The incorporation of oxamide effectively suppresses iodide vacancy defects, promotes uniform crystal growth and reduces non-radiative recombination, while the buried-interface modification by potassium tartrate regulates the energy-level alignment, passivates interfacial traps and promotes carrier extraction. Benefiting from this dual regulation, the modified CsPbI 3 -based IPSCs achieve a power conversion efficiency of 18.89% and exhibit significantly improved environmental stability. This work provides a simple, effective and scalable approach to address the intrinsic phase instability and interfacial defect problems in CsPbI 3 -based IPSCs.
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产品关联
DOI
PubMed
高影响因子
Small
·
2024
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IF 13
Hongmei Luo,Lichao Jiang,Yuxin Guo,Min Li,Longyu Hu,Hao Wu,Wei Cui,Rong Ran
Developing conductive hydrogels with both high strength and fracture toughness for diverse applications remains a significant challenge. In this work, an efficient toughening strategy is presented that exploits the multiple enhancement effects of anions through a synergistic combination of mineralization, salting-out, and ion coordination. The approach centers on a hydrogel system comprising two polymers and a cation that is highly responsive to anions. Specifically, polyvinyl alcohol (PVA) and chitosan quaternary ammonium (HACC) are used, as PVA benefits from salting-out effects and HACC undergoes ion coordination with multivalent anions. After just 1 h of immersion in an anionic solution, the hydrogel undergoes a dramatic improvement in mechanical properties, increasing by more than three orders of magnitude. The optimized hydrogel achieves high strength (26 MPa), a high Young's modulus (45 MPa), and remarkable fracture toughness (67.3 kJ m −2 ), representing enhancements of 860, 3200, and 1200 times, respectively, compared to its initial state. This breakthrough overcomes the typical trade-off between stiffness and toughness. Additionally, the ionic conductivity of the hydrogel enables reliable strain sensing and supports the development of durable supercapacitors. This work presents a simple and effective pathway for developing hydrogels with exceptional strength, toughness, and conductivity.
研究领域:
材料科学
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生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
TOXICOLOGY LETTERS
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2021
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IF 4.374
Shanqi Guo,Yangyi Zhang,Shuo Wang,Tong Yang,Baojie Ma,Xiaojiang Li,Yizhuo Zhang,Xingkang Jiang
Antimony is a common environmental contaminant that causes biological toxicity in exposed populations worldwide. Previous studies have revealed that antimony promotes prostate cancer growth by stabilizing the c-Myc protein and mimicking androgen activity. However, the role of lncRNAs in the regulation of antimony-induced carcinogenesis remains unknown, and the precise mechanisms need to be explored. In the present study, we found that chronic exposure to antimony promoted cell growth and lipid metabolic disequilibrium in prostate cancer. Mechanistically, we identified a long noncoding RNA molecule, PCA3, that was substantially upregulated in LNCaP cells in response to long-term antimony exposure. Functional studies indicated that abnormal PCA3 expression modulated antimony-induced proliferation and cellular triglyceride and cholesterol levels. In addition, PCA3 levels were found to be inversely correlated with MIR-132-3 P levels by acting as a decoy for MIR-132-3P. Besides, SREBP1 directly interacted with MIR-132-3 P to increase cell growth and disrupt lipid metabolism by targeting its 3’UTR regions. Taken together, our results revealed that lncRNA PCA3 promotes antimony-induced lipid metabolic disorder in prostate cancer by targeting MIR-132-3 P/SREBP1 signaling.
研究领域:
癌症生物学
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毒理学
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分子生物学
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环境健康
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产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
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2018
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IF 2.687
Licheng Lin,Zhentao Li,Xi Song,Yanpeng Jiao,Changren Zhou
In this study, chitosan and lanthanum hydroxide composite aerogel beads were prepared for phosphorus adsorption via co precipitation and supercritical carbon dioxide drying technique. The porous structure of composite aerogel beads was investigated by scanning electron microscope (SEM), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET) measurements. The results showed that the aerogel bead with mass ratio of chitosan to lanthanum chloride 100:50 exhibited a larger surface area of 172.74 m 2 /g and a pore volume of 1.05 cm 3 /g, respectively. Also the phosphorus adsorption kinetics of the aerogel bead showed a faster adsorption rate and the larger adsorption capacity (148.33 mg/g) for phosphorus. In addition, adsorption kinetics model analysis showed that the phosphorus adsorption process fitted both pseudo-first order and pseudo-second order kinetic model.
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
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2021
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IF 6.953
Mi Feng,Jipeng Yan,Bin He,Xinyan Chen,Jian Sun
It is important to convert waste shrimp shells into chitin and its derivatives, but it still faces disadvantages of pollution and long process. In this research, deep eutectic solvents made from choline chloride (ChCl) and p-toluenesulfonic acid monohydrate (TsOH) were used to convert shrimp shells into chitin or carbon materials through adjustment of temperature with a dissolution-regeneration method in one step. Obtained precipitates and regenerated products gradually changed from chitin to carbon materials with the temperature adjusted to 130 °C and 110 °C, respectively. The α-chitin with the highest purity of 97.9 ± 0.1 wt% was prepared using 15 wt% ChCl/TsOH (1:2, n:n) aqueous solution at 70 °C, and the yield was 59.4 ± 1.9 wt%. Moreover, the carbon materials prepared by ChCl/TsOH (1:4) treatment with water and ethanol as anti-solvent were S/N/O-doped carbon materials, which exhibited potential in the supercapacitor with a specific capacitance of 24.8 and 19.3 F/g at 1 A/g, respectively.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
BIOMATERIALS
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2022
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IF 15.304
Yiqiong Liu,Dailin Xu,Ying Liu,Xiao Zheng,Jie Zang,Wanli Ye,Yuge Zhao,Ruiqing He,Shuangrong Ruan,Tingting Zhang,Haiqing Dong,Yan Li,Yongyong Li
Tumor hyaluronan (HA) accumulation is closely associated with the formation of a hypoxic microenvironment that is highly immunosuppressive and severely hinders the efficacy of antitumor therapeutics. To address this problem, we develop an effective HA attenuation strategy that uses an integrated nanosystem based on mesoporous polydopamine (mPDA) with excellent photothermal conversion efficiency to boost hyaluronidase (HAase) activity remotely. Upon light irradiation, the thermal effect generated by mPDA not only directly kills tumor cells that produces an in situ vaccine effect, but also significantly boosts HAase activity (∼5 folds), leading to marked HA break down. Photoheat and HA degradation synergistically reduce tumor HIF-1α expression and reverse immunosuppressive responses. Using the synergistic treatment in a breast cancer model, we find decreased infiltration of immunosuppressive cells, including myeloid-derived suppressor cells, M2 macrophages, and regulatory T cells , increased immune-activated cells, such as mature dendritic cells and CD8 + T cells, and reduced immune checkpoint PD-L1 expression. The resulting relief from tumor microenvironment immunosuppression significantly contributes to an enhanced antitumor effect. This study provides an effective strategy to improve the hypoxic tumor microenvironment and simultaneously promote immune-mediated tumor regression.
研究领域:
癌症生物学
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免疫治疗
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纳米技术
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光热治疗
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肿瘤微环境
✓ 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）