JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Lei Liao,Shilong Song,Gaoling Liang,Xiaoqiang Wang,Ning Pan,Hao Lei,Yongde Zhang,Hao Zou,Jiajia Cheng,Jie Wen,Weifeng Zhang,Tingting Deng
Silver-loaded silica gel is widely used in spent fuel reprocessing plant due to its high adsorption efficiency of iodine and low influence of humidity and NO x . This study proposed a novel method for the disposal of iodine-loaded silver-silica gel. The elution of iodine using Na 2 S solution, the leaching of silver through HNO 3 solution. Subsequently, Zero-valent silver was synthesized via reduction of Ag + with NaBH 4 to recover silver. Additionally, the eluted iodide ions were transformed into iodosodalite and then combined with borosilicate glass powder for secondary immobilization. The results demonstrated that the elution efficiency of Na 2 S was 99.03%, the leaching efficiency of HNO 3 was 99.20%, and the recovery efficiency of Ag reached 86.93%. The iodine static saturated adsorption capacity of the silver-loaded silica gel prepared using recycled silver was 129.95 ± 3.46 mg/g, higher than original silver-loaded silica gel. In addition, the secondary immobilization body had a dense structure. The iodine leaching rate was 1.2×10 -4 g ⋅ m -2 ⋅ d -1 , which showed a good chemical stability. This work successfully realized the recycling of silver in iodine-containing silver-loaded silica gel and the safe disposal of iodine, which can provide new ideas for the disposal of iodine waste in spent fuel reprocessing plant.
研究领域:
核化学与化工
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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
GREEN CHEMISTRY
·
2019
·Vol. 21
·期 15
·4169-4177
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IF 9.405
Yang Peng,Xianghua Li,Tian Gao,Teng Li,Weiran Yang
Starch is available in large quantities and at cheap price, especially that from stale rice, root and tuber crops, etc., which makes it desirable for conversion to value-added products. A metal-free approach to convert starch to 5-methylfurfural (5-MF) using hydrochloric acid, sodium iodide and hydrogen in a biphasic solvent system has been developed. 5-MF is an important fine chemical, widely used in food, medicine, pesticides, cosmetics and other industries, and is also considered to be an important bio-gasoline precursor. I− has superior nucleophilic substitution properties and high reactivity towards C–O bond cleavage, which is crucial for this transformation. Under optimal reaction conditions, 38.0% of 5-MF and 45.6% of total organic products can be obtained from starch with 22.5% levulinic acid as the main side product. Besides, 80.8% 5-MF can be directly obtained from 5-hydroxymethylfurfural (HMF) through the same process. To the best of our knowledge, this is the first reported example of a metal-free process to convert starch and HMF directly to 5-MF. The reaction mechanism was well studied. The catalyst system was proved to be stable and was recycled five times without loss of activity.
研究领域:
化学工程
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生物质转化
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绿色化学
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产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2022
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IF 9.221
Chunqiu Xia,Xiaomin Zhang,Xiaotao Liu,Dehuai Wu,Liangqia Guo
2, 2′-azinobis-3-ethylbenzthiazoline-6-sulfonate (ABTS), 3, 3′, 5, 5′-tetramethylbenzidine (TMB), o-phenylenediamine (OPD) are typical chromogenic substrates to evaluate the activity of peroxidase-like nanozymes. However, these substrates are toxic, unstable, and the coloration reactions are slow. Herein, the classical starch-sodium iodide reagent was utilized as the chromogenic substrate to evaluate peroxidase-like activity of nanozymes. Starch-sodium iodine is less toxic, more stable and faster color reaction than ABTS, TMB and OPD. Under the catalysis of peroxidase-like nanozymes such as Mo 5 N 6 nanosheets , graphene oxide nanosheets, Fe 3 O 4 nanoparticles , CeO 2 nanoparticles, iodide ion (I – ) is oxidized by H 2 O 2 to produce blue color complex (starch-I 2 ). Taking Mo 5 N 6 nanosheets as the peroxidase-like nanozyme, the color reaction completed within 5 min at room temperature (25 ºC), and the chromogenic substrate remained stable within 30 days. The maximum reaction rate (V max ) using starch-sodium iodine as the chromogenic substrate was more than 100-fold higher than that of TMB. Based on this, a sensitive colorimetric sensor and facile portable agarose gel test kits were proposed and applied for the detection of H 2 O 2 residue in liquid milk samples with fast response.
研究领域:
生物化学
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纳米生物学
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分析化学
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产品关联
DOI
高影响因子
GREEN CHEMISTRY
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2020
·Vol. 22
·期 21
·7468-7475
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IF 9.48
Shengqin Liu,Huan Feng,Teng Li,Yantao Wang,Nianxin Rong,Weiran Yang
Propionic acid (PA), a valuable chemical widely used in the food and feed industry, is currently produced by the petrochemical industry. Selective production of PA from bio-based lactic acid (LA) is difficult due to the high activation energy of the hydroxyl group at the α position of the carboxyl group. Herein, a metal-free catalytic system for the highly selective transformation of bio-based LA to PA, which was used as the solvent to simplify the separation step, is reported using NaI as the catalyst. Under the optimal reaction conditions, a >99% yield of PA can be obtained from LA. A heat-induced radical-activated hydrogen mechanism was proposed based on the kinetic study and intermediate capture. The metal-free system can be reused five times without any loss in activity, and the PA product is easily separated. In addition, a two-step method using cellulose as the raw material to produce PA was conducted. This strategy offers a green and efficient approach to synthesize PA from biomass resources.
研究领域:
化学工程
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绿色化学
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催化
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DOI
高影响因子
ACS ES&T Engineering
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2021
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IF 0
Jia-Qi Chen,Guannan Zhou,Chuan-Shu He,Qi Li,Yi-Ran Wang,Yang Mu
Although the existence of ubiquitous natural organic matter (NOM) exerts significant effects on the performance of zerovalent iron (ZVI), size-dependent response of the reactivity of ZVI toward NOM under both aerobic and anaerobic conditions has not been considered. In this study, the oxic removal and anoxic removal of the pollutant diatrizoate (DTA) by mechanochemically prepared ZVI of varying sizes in the presence of humic acid (HA), a typical NOM, were investigated comparatively. When oxygen was present, the effect of HA on DTA degradation transformed from promotion to inhibition as the particle size of ZVI decreased from microscale (mZVI) to nanoscale (nZVI). By contrast, in the absence of oxygen, HA always suppressed DTA removal regardless of ZVI size. Under aerobic conditions, HA complexed with Fe(III) (hydr)oxides and then detached from the mZVI surface, leading to the depassivation effect and promotion of atomic hydrogen (H*), while HA and HA–Fe(III) complexes coated the surface of nZVI with a relatively smaller size and suppressed the formation of H*. Under anaerobic conditions, adsorbed HA and associated HA–Fe(II) complexes covered the surfaces of mZVI and nZVI to different extents, resulting in the occupation of active sites and inhibiting generation of H*. This study provides an in-depth insight into the interaction between ZVI and NOM and may serve as theoretical guidance for the application of ZVI-based technologies.
研究领域:
环境科学
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化学工程
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材料科学
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DOI
PHYTOMEDICINE
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2024
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IF 6.7
Chengda Ren,Chengyu Hu,Ming Hu,Yan Wu,Yang Yang,Fang Lu
Background Melatonin is an antioxidant that also has anti-inflammatory effects. It has been reported to delay the progression of age-related macular degeneration (AMD), however, the mechanism has not been fully recognized. Purpose The aim of the present study was to investigate the effects of melatonin on sodium iodate (SI)-induced retinal degeneration and elucidate the specific mechanisms, then, provide novel targets in AMD treatment. Methods Retinal degeneration mouse model and in vitro retinal pigment epithelium (RPE) death model were established by SI treatment. Melatonin was administrated intraperitoneally at a concentration of 20, 40 or 80 mg/kg for in vivo study or treated at 48 h before SI treatment. To confirm the therapeutic effects of melatonin on mouse, the retinal structure and visual function were evaluated. The specific cell death rates were determined by CCK-8 assay, PI staining and protein level of RIPK3. The cytosolic or mitochondrial calcium levels were determined by Fluo-4AM or Rhod-2AM staining. Mitochondrial functions including mitochondrial dynamics, mitochondrial membrane potential, or mitochondrial permeability pore opening were evaluated. The proteins involved in endoplasmic reticulum (ER) stress were measured by western blot assay while the genes expression in calcium signaling pathway were measured by RT-qPCR. Results We show that melatonin protects RPE cells from necroptosis and NLRP3 inflammasome activation induced by SI. Mechanistically, melatonin suppresses ER stress and intracellular calcium overload triggered by SI through restoring the function of SERCA2. Silencing of SERCA2 or blocking of melatonin receptors inhibit the protective effects of melatonin. Melatonin reduces mitochondrial Ca 2+ levels and restores mitochondrial membrane potential. Constant mitochondrial Ca 2+ overload directly promote cell necroptosis through mitochondrial fission. Inhibition of mitochondrial fission by Mdivi-1 prevent necroptosis induced by SI without altering the level of mitochondrial Ca 2+ . Conclusions The results confirmed that melatonin protects RPE cells from SI-induced injury by regulates MT2/SERCA2/Ca 2+ axis. This study highlighted the potential of melatonin in the treatment of AMD and elucidated the mechanism and signaling pathway that mediate the protective effects.
研究领域:
眼科学
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药理学
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细胞生物学
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分子生物学
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产品关联
DOI
PubMed
高影响因子
INORGANIC CHEMISTRY
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2024
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IF 4.3
Shouyuan Li,Jiahui Xue,Lei Ji,Xinyuan Li,Jiatao Zhang
Core–shell nanocrystals (C–S NCs) are an essential class of materials whose structural engineering has attracted wide attention due to their tunable optical and electrical properties, especially noble metal@semiconductor (NMS) C–S NCs with flexible plasmon-exciton coupling. Due to their diverse critical applications, especially aqueous biological applications, herein we propose an aqueous topological strategy enabled by cation exchange reactions (CER) to synthesize various plasmonic Au@semiconductor C–S NCs, in which environmentally friendly triphenylphosphine (TPP) is used as an initiator instead of inflammable tributyl phosphine (TBP). The introduction of the milder, solid TPP facilitated a new aqueous CER strategy for synthesizing Au@semiconductor NCs with tailored chalcogenide compositions and morphologies. For example, the as-synthesized Au@ZnS C–S NRs had better absorption and biocompatibility and exhibited excellent photodynamic therapy efficacy.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
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IF 6.3
Zhiqiang Gao,Li Ding,Hongying Lv,Yaheng Zhang,Yalin Yu,Shi Cheng,Yukai Zong,Dongdong Ge,Shouqiang Huang
The detrimental effects of chloride (Cl − ) ions on industrial wastewater necessitate the in-situ monitoring of Cl − , which is challenging due to the limited availability of field-applicable analytical methodologies. Herein, a novel and compact apparatus (CPB-FC-Cl) was developed for the precise quantification of Cl − in wastewater. This innovative system utilizes the rapid halide exchange of cesium lead bromide (CsPbBr 3 ) perovskite nanocrystals (NCs) with Cl − , a process marked by a pronounced wavelength blueshift and a vivid fluorescence transition from green to blue. The software in the CPB-FC-Cl system automatically identified the fluorescence emission peaks and displayed the Cl − concentration values on the user interface. The detection experiments conducted on actual hydrochloric acid wastewater confirmed the device’s ability to accurately measure Cl − concentrations within 5 min, achieving an accuracy of 98.98 %. The CPB-FC-Cl system exhibited high selectivity in the presence of various coexisting substances in hydrochloric acid wastewater, and its resistance to potential interferences supports its suitability for precise Cl − quantification. The stability of the CPB-FC-Cl system showed an average detection accuracy of 98.96 % over multiple cycles, which underscores its robustness for long-term monitoring applications.
研究领域:
环境科学
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分析化学
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Shiyang Chen,Yao Zheng,Jianyu Gong,Shuhua Mo,Yuechen Ren,Junran Xu,Minsheng Lu
Widespread occurrence of sulfides in domestic and industrial wastewater contributes to environmental pollution and poses risks to human health. Therefore, the development of highly selective, sensitive, and rapid sulfur ion (S 2− ) detection probes in aquatic ecosystems is of paramount importance. In this study, lignin-stabilized silver nanoprisms (EHL@AgNPRs) were prepared using the seed growth and self-assembly methods. Based on this, a novel, high-performance, and environmentally friendly S 2− colorimetric detection method was proposed. Lignin is believed to coat the surface of AgNPRs through cation-π and electrostatic interactions, acting as an excellent dispersant and stabilizer to prevent aggregation and shape deformation. This allows AgNPRs to maintain localized surface plasmon resonance (LSPR) characteristics and superior colorimetric sensing sensitivity towards S 2− even after 30 d. The EHL@AgNPRs exhibited remarkable selectivity towards S 2− with a minimum detection limit of 41.3 nM. The conjugation of lignin with AgNPRs offers a highly promising approach for the rapid detection of S 2− in natural aquatic environments and for the valorization of lignin.
研究领域:
环境科学
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材料科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemCatChem
·
2024
·
IF 3.8
Cong Luo,Haoru Tang,Houfang Lu,Kejing Wu,Yingying Liu,Yingming Zhu,Binshen Wang,Bin Liang
Graphical A high glycerol carbonate yield of 90 % is achieved by the one–pot reaction of CO 2 , propylene oxide, and glycerol catalysed by DBU–based PIL, which can be facilely recovered and steadily reused without deactivation. The development of efficient heterogeneous catalysts for upgrading CO 2 , a greenhouse gas, and glycerol (Gly), an untapped biomass resource, into glycerol carbonate (GC) remains a challenge. Herein, 1,8-diazabicyclo[5.4.0] undec–7–ene (DBU)–based poly (ionic liquid)s (PILs) were constructed for the one–pot synthesis of GC from CO 2 , Gly, and propylene oxide. Among them, P−DVB−DBUVBI–1 exhibited the best catalytic performance, achieving a GC yield of 90 % under optimal reaction conditions (100 °C, 6 h). The PIL catalyst was easily recovered and reused, as demonstrated by stable activity over five cycles. Density functional theory calculations showed that owing the strong positive charge delocalization ability of DBU onium, DBU–based PILs exhibit high nucleophilicity, which is the key to their efficient catalytic performance in the one–pot reaction.
研究领域:
化学
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材料科学
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环境科学
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催化
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产品关联
DOI
高影响因子
Nanoscale
·
2024
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IF 5.8
Dong Wang,Zhiwei Zhang,Xuetao Yan,Tianliang Li,Yingying Chen,Zhenzhen Li,Lingyan Feng
Circularly polarized luminescence (CPL) is a fascinating luminescence phenomenon that has garnered significant research attention for chiroptical applications. In this study, we developed a highly sensitive chiroptical sensor by co-assembling G-quartet nanofibers and nonchiral nitrogen sulfur-doped carbon dots (N–S-CDs) for dual ion detection. The N–S-CDs were synthesized using the one-step microwave method, and a helical G-quartet-based nanofiber structure (g-fiber) was simultaneously formed from guanosine 5′-monophosphate (GMP) in the presence of Sr2+. An adjustable helical G-quartet-based nanofiber provided an optimal chiral environment for CPL emission, with a dissymmetry factor (glum) reaching ±0.02. Notably, the left-handed (L-) and right-handed (R-) helical chirality of the complex was determined by switching between kinetic trap states and thermodynamic equilibrium during the reaction process. An optimized CPL sensor was developed based on chiral CDs/g-fiber composite materials, utilizing sensitive CPL as the signal output of dual detection for Hg2+ and I−. Similar limits of detection (LODs) were achieved for both L-/R-nanocomposites, with the best results being 83.5 nM for Hg2+ and 142.8 nM for I−. These values are comparable with or even better than those obtained with other optical analytical methods. Since CPL biosensors are relatively rare to date, our work presents a new horizon for the application of chiral CPL composites in biological assays.
研究领域:
分析化学
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材料科学
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生物传感
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产品关联
DOI
PubMed
高影响因子
Arabian Journal of Chemistry
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2024
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IF 5.3
Jin Liu,Qian Zhong,Yanjin Wang,Zezhi Zhang,Huiqin Zheng,Bin Yan,Yurong Shi
Designing photocatalysts with p-n heterojunction structures is an effective way to boost the separation of photogenerated carriers and stimulate the photocatalytic degradation activity. Herein, an efficient visible-light responsive AgI/BiSI p-n heterojunction photocatalyst was successfully constructed. X-ray photoelectron spectroscopy (XPS), photoluminescence (PL) spectroscopy, and electrochemical measurements confirmed that the AgI/BiSI p-n heterojunction structure was beneficial to the separation and transfer of photogenerated carriers, promoting the generation of main active species (•O 2 − and h + ). Furthermore, the photocatalytic degradation rate constants of Acid Red 1 (0.4699 min −1 ) and metronidazole (0.0730 min −1 ) over the optimal AgI/BiSI were about 8.4 and 3.0 times higher than those over pure AgI, respectively. This work provides a heterojunction engineering strategy to design high-efficient photocatalysts for the degradation of refractory organic pollutants.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）