Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jiaxue Sun,Chongqing Mei,Fanmin Zhu,Zhanbin Huang,Chuanfu Li
This study is to prepare a phosphorus-modified dolomite passivation material (P-DO) through hydrothermal method and synthesis for the remediation of cadmium (Cd) in acidic soil. The surface morphology and elemental composition of dolomite and its modified materials were characterized by scanning electron microscopy and energy-dispersive spectroscopy (SEM-EDS), X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The adsorption process was simulated using adsorption models to elucidate the Cd immobilization mechanisms. Experimental results demonstrated optimal alignment with the Freundlich isotherm and pseudo-second-order kinetic model, achieving adsorption equilibrium within 8 h. Spectroscopic analysis revealed three primary binding mechanisms: coordination through oxygen-containing carbon groups, Mg-O complexation, and phosphate ligand exchange via P-OH groups. Soil remediation trials established an optimal P-DO dosage of 1%, the passivation efficiency of Cd in soil by P-DO was 54.9%. Furthermore, this treatment decreased DTPA-extractable Cd by 12.696 mg·kg - ¹ and reduced acid-soluble Cd fractions by 42.3%. In summary, the modification of dolomite enables synergistic solid waste valorization and immobilization of Cd, positioning it as a high-performance functional material for sustainable remediation technologies.
研究领域:
环境科学
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材料科学
·
土壤修复
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吸附技术
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地球化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·
IF 13.3
Yongfeng Liu,Xiuwen Shao,Zhaoju Gao,Qingyu Xie,Yupeng Ying,Xiaolin Zhu,Zhangcheng Pan,Jinpeng Yang,Hao Lin,Xiaosheng Tang,Weiwei Chen,Wei Pei,Yusong Tu
Inorganic CsPbX 3 perovskite quantum dots (PeQDs) show great potential in white light-emitting diodes (WLEDs) due to excellent optoelectronic properties, but their practical application is hampered by low photoluminescence quantum yield (PLQY) and especially poor stability. Herein, we developed an in-situ and general multidentate ligand passivation strategy that allows for CsPbX 3 PeQDs not only near-unit PLQY, but significantly improved stability against storage, heat, and polar solvent. The enhanced optical property arises from high effectiveness of the multidentate ligand, diethylenetriaminepentaacetic acid (DTPA) with five carboxyl groups, in passivating uncoordinated Pb 2+ defects and suppressing nonradiative recombination. First-principles calculations reveal that the excellent stability is attributed to tridentate binding mode of DTPA that remarkably boosts the adsorption capacity to PeQD core. Finally, combining the green and red PeQDs with blue chip, we demonstrated highly luminous WLEDs with distinctly enhanced operation stability, a wide color gamut of 121.3% of national television system committee, standard white light of (0.33,0.33) in CIE 1931, and tunable color temperatures from warm to cold white light readily by emitters’ ratio. This study provides an operando yet general approach to achieve efficient and stable PeQDs for WLEDs and accelerates their progress to commercialization.
研究领域:
材料科学
·
光电技术
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEDICINAL CHEMISTRY
·
2024
·
IF 6.8
Yinghui Ding,Xinzhong Ruan,Kun Shu,Weiyuan Xu,Yao Liu,Gengshen Mo,Jiao Xu,Yong Jian,Jilai Zhang,Lingfeng Zhang,Keren Wang,Ji-Ting Hou,Jianliang Shen,Zhihan Yan,Fangfu Ye,Jiang Zhu,Lixiong Dai
Hepatobiliary-specific magnetic resonance imaging contrast agents (MRI CAs) play a crucial role in the early diagnosis of hepatocellular carcinoma (HCC). However, only two acyclic CAs, Gd-BOPTA and Gd-EOB-DTPA, exhibit unfavorable kinetic inertness. Our study focused on the development of superior stable innovative macrocyclic CAs. By introducing a lipophilic benzyloxy group (OBn) into the H4DOTA ring (Gd-L1), we achieved significant enhancement in kinetic inertness. In vivo experiments in mice demonstrated that 40% of the dosage was distributed to the liver at 5 min, providing sustained hepatic enhancement for over 35 min. We also developed an MPO-responsive MRI CA (Gd-L3), which can participate in the “peroxidase cycle” as the substrate, generating oligomers with a 3.8-fold increase in relaxivity, and selectively enhance the lesion in an acute gout mouse model. Overall, our work represents a significant advancement in the field of hepatic and inflammatory MRI, offering promising avenues for early diagnosis and improved imaging outcomes.
研究领域:
医学成像
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药物化学
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分子生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
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IF 5.518
Fangfang Ren,Simin Li,Wenqing Zheng,Qianyi Song,Wenhui Jia,Yaqin Nan,Haijiao Jia,Jia Liu,James Jianmin Bao,Youxin Li
In this paper, an active, recyclable and stable magnetic palladium nanocatalyst (Fe 3 O 4 @SiO 2 -DTPA-Pd) was reported which could catalyze Suzuki coupling reaction. The Pd was stably hold by the three nitrogen atoms at the inside and four acetic acid groups at the outside of the chelating ligand ethylenediaminepentaacetic acid (DTPA) on the surface of core-shell magnetic Fe 3 O 4 @SiO 2 microspheres . The prepared Fe 3 O 4 @SiO 2 -DTPA-Pd was systematically characterized. Results showed its size was 10–20 nm with 0.535 mmol/g Pd 2+ /Pd 0 . It could monodisperse in liquid, was thermally stable and good magnetic response from the high saturation magnetization value at 35.9 emu/g. Its activity was evaluated through Suzuki coupling reactions between 14 types of aryl halides and phenylboronic acid under optimized reaction conditions. It exhibited excellent activities and good applicability to substituted iodobenzene and bromobenzene . The yield of 4-bromobenzonitrile was up to 97.93%. Furthermore, the Fe 3 O 4 @SiO 2 -DTPA-Pd catalyst was stable, reusable and conveniently recovered by applying an external magnetic field. After 20 consecutive reaction cycles, the yield was still above 85%, which showed a superior heterogeneous advantage over other catalysts reported in the literature and had the huge potential in actual application of industry.
研究领域:
化学
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催化
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 20
·9707-9719
·
IF 7.233
Jia Zhou,Tianliang Li,Chunlei Zhang,Junyuan Xiao,Daxiang Cui,Yingsheng Cheng
Multifunctional nanoplatforms have been developed into advanced drug delivery systems for cancer therapy. In this study, we report a charge-switchable nanocapsule with multistage pH-responsive behaviors. First, DOX-encapsulated and oleylamine-embedded hollow structures with a diameter of 132 ± 21 nm are prepared via the double emulsion method. Subsequently, the hollow structures are encompassed by Gd-DTPA-, chlorin e6 (Ce6)-, and folate (FA)-modified BSA to form tumour-targeted, dual NIR/MR imaging-guided and chemo–photodynamic therapeutic nanoplatforms. Importantly, the nanocapsule can intelligently switch its surface charge to positive under mildly acidic conditions (pH 6.5) with no release of Ce6 and DOX, which is confirmed by ξ-potential and cumulative release measurements. Moreover, confocal imaging pictures demonstrate that acid-sensitive DOX sealed in nanocapsules is progressively released into the nuclei of MGC-803 cells. These advantages as well as FA-targeting facilitate effective endocytosis and synergistic therapeutic efficacy. Selective tumour accumulation and long tumour retention time are further indicated by NIR/MR in vivo imaging. In addition, excellent therapeutic efficacy combined with chemotherapy (DOX) and photodynamic therapy (PDT) is observed with the tumour eventually ablating at the 15th day. All results demonstrate that the as-prepared nanocapsules hold great potential for clinical cancer theranostics.
研究领域:
癌症治疗
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药物递送系统
·
纳米技术
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成像技术
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2023
·
IF 8.2
Qingqing Wang,Xiaoli Jia,Mingchao Jin,Ruijie Guo,Baolong Niu,Hong Yan,Huifang Wang
In this study, a kind of magnetically recyclable adsorbent for dyes was synthesized by grafting diethylenetriamine pentaacetate acid (DTPA) to the composite of Fe 3 O 4 microspheres and crosslinked chitosan (CS). The microstructures, molecular structure, crystal structure, and magnetic hysteresis loops of the chitosan matrix adsorbent before and after grafting was characterized. The results suggested that DTPA was covalent bonded with the composite of Fe 3 O 4 microspheres and chitosan. The modified composite has larger specific surface area and can realize rapid solid-liquid separation. Batch experiments were conducted to optimize the parameters affecting the adsorption of methyl orange (MO). The adsorption process could be better described by pseudo-second-order kinetics model and Langmuir isotherm equation, and its saturated adsorption capacity of the modified adsorbents was 1541.5 mg·g −1 at 25 °C, which was 1.40 times of that the unmodified adsorbent (1104.1 mg·g −1 ). The obtained values of the thermodynamic parameters indicated that the adsorption was a spontaneous process. The regeneration experiment proved the stability and reproducibility of the adsorbent even after five cycles of adsorption-desorption. The primary adsorption mechanism was electrostatic interaction and hydrogen bonding. The adsorbent could be potentially applied for removing dyes from wastewater in wide pH of range, especially acid wastewater.
研究领域:
环境科学
·
化学工程
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材料科学
·
水处理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2024
·
IF 8.2
Zhiqin Chen,Qizhen Liu,Dan Chen,Yingjie Wu,Yasir Hamid,Qiang Lin,Shijun Zhang,Ying Feng,Zhenli He,Xianyuan Yin,Xiaoe Yang
Plant growth regulators (PGR) and plant growth-promoting bacteria (PGPB) have the potential in phytoremediation of heavy metals (HMs) contaminated soils. However, their sole application may not yield the optimal results, thus necessitating the combined application. The present study aimed to enhance the phytoremediation efficiency of Sedum alfredii Hance ( S. alfredii ) in acidic and alkaline soils through the combination of PGR (Brassinolide, BR) and PGPB ( Pseudomonas fluorescens , P. fluorescens ). The combination of BR and P. fluorescens (BRB treatment) effectively increased the removal efficiency of S. alfredii for Cd, Pb, and Zn by 355.2 and 155.3 %, 470.1 and 128.9 %, and 408.4 and 209.6 %, in acidic and alkaline soils, respectively. Moreover, BRB treatment led to a substantial increase in photosynthetic pigments contents and antioxidant enzymes activities, resulting in a remarkable increase in biomass (86.71 and 47.22 %) and dry mass (101.49 and 42.29 %) of plants grown in acidic and alkaline soils, respectively. Similarly, BRB treatment significantly elevated the Cd (109.4 and 71.36 %), Pb (174.9 and 48.03 %), and Zn levels (142.8 and 104.3 %) in S. alfredii shoots, along with cumulative accumulation of Cd (122.7 and 79.47 %), Pb (183.8 and 60.49 %), and Zn (150.7 and 117.9 %), respectively. In addition, the BRB treatment lowered the soil pH and DTPA-HMs contents, while augmenting soil enzymatic activities, thereby contributing soil microecology and facilitating the HMs absorption and translocation by S. alfredii to over-ground tissues. Furthermore, the evaluation of microbial community structure in phyllosphere and rhizosphere after remediation revealed the shift in microbial abundance. The combined treatment altered the principal effects on S. alfredii HMs accumulation from bacterial diversity to the soil HMs availability. In summary, our findings demonstrated that synergistic application of BR and P. fluorescens represents a viable approach to strengthen the phytoextraction efficacy of S. alfredii in varying soils.
研究领域:
环境科学
·
植物修复
·
土壤学
·
微生物学
·
植物生理学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）