CHEMISTRY OF MATERIALS
·
2016
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IF 9.407
Jie Fu,Qingwen Tian,Zhengji Zhou,Dongxing Kou,Yuena Meng,Wenhui Zhou,Sixin Wu
Additional elements in the Cu2ZnSn(S,Se)4 (CZTSSe) absorber layers can play a crucial role in improving the performance of thin film solar cells. In this paper, a significant performance enhancement of CZTSSe thin film solar cells was achieved by the partial substitution of the Zn2+ cation with Cd2+. A small amount of Cd2+ can be successfully incorporated into the host lattice of CZTSSe to form a homogeneous Cu2Zn1–xCdxSn(S,Se)4 (CZCTSSe) alloy material. We demonstrated that the crystal growth and the band gap of CZCTSSe thin films are affected by the Cd doping level. Additionally, the impact of Cd content on the space-charge density (Nc-v) and the depletion width (Wd) of CZCTSSe solar cells was systematically investigated. By this cation substitution approach, the power conversion efficiency of the solar cells based on the CZCTSSe absorber was successfully increased from 5.41 to 8.11% for the optimal composition (x = 5%).
研究领域:
材料科学
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光伏技术
·
半导体物理
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DOI
高影响因子
Journal of Environmental Sciences
·
2021
·
IF 5.565
Biran Zhu,Ziniu Wang,Lei Lei,Yongyong Guo,Jian Han,Bingsheng Zhou
Cadmium (Cd), a ubiquitous environmental hazardous heavy metal, poses a significant threat to the health of aquatic organisms, including teleosts. Although the toxic profile of Cd is well recognized, little is known regarding the overall view of toxic responses to varying aquatic environmental parameters (e.g., water hardness) at an individual level. Herein, differences in water hardness were partially mimicked by adjusting Ca 2+ levels in E3 medium. As an in vivo model, zebrafish embryos were exposed to variable Ca 2+ levels (NV, normal Ca 2+ ; LV, low Ca 2+ ; HV, high Ca 2+ ) alone or combined with 30.7 µg/L Cd 2+ (NC, LC, and HC, respectively) until 144 hr post-fertilization. The genome-wide transcriptome revealed differentially expressed genes between groups. Functional enrichment analysis found that biological processes related to metabolism, particularly lipid metabolism, were significantly disrupted in NC and LC treatments, while a remission was observed in the HC group. Biochemical assays confirmed that the decrease in Ca 2+ enhanced synthesis, inhibited mobilization and increased the storage of lipids in Cd 2+ treatments. This study suggests that the toxic effect of Cd on biological pathways will be influenced by Ca 2+ , which will improve the toxicological understanding and facilitate accurate assessment of Cd.
研究领域:
毒理学
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环境科学
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分子生物学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2024
·Vol. 35
·期 17
·1-9
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IF 2.8
Xu Changyuan,Yin Hongming,Song Wenqiang,Wang Qun,Zhao Fengjiao
When employing the conventional melt quenching technique for the preparation of Mn 2+ -doped glasses, it is observed that Mn 2+ readily undergoes oxidation to Mn 3+ during high-temperature melting. Typically, researchers incorporate reducing agents into the synthesized raw materials or utilize a reducing atmosphere when preparing samples to mitigate this phenomenon. In this study, a novel approach was proposed to suppress Mn 2+ oxidation and enhance its luminescent properties. The zinc phosphoborate glasses based on 28.1P 2 O 5 –10.9B 2 O 3 –28.1ZnO (P–B–Zn) were prepared using the traditional melt quenching method. The effect of Cd 2+ on the red emission of Mn 2+ was studied by doping 2.9 mol% Mn 2+ and changing the concentration of Cd 2+ in the glasses. The analysis of photoluminescence emission (PL) spectroscopy and photoluminescence excitation (PLE) spectroscopy revealed a significant enhancement in the red emission resulting from the 4 T 1 (G) → 6 A 1 (S) transition of Mn 2+ under 409 nm excitation after doping with Cd 2+ ions. When the doping content of Cd 2+ is 19 mol%, the luminescence intensity of Mn 2+ reaches its maximum value, which is 4.24 times higher than that of undoped Cd 2+ . The results of the absorption and transmission spectra indicate a weakening of the 5 E g → 5 T 2g transition of Mn 3+ and an increase in the transparency of the glasses. The significant reduction in the absorption peak of Mn 3+ suggests that doping Cd 2+ can effectively inhibit the oxidation of Mn 2+ to Mn 3+ , as further confirmed by X-ray photoelectron spectroscopy (XPS) analysis.
研究领域:
材料科学
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光学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2020
·
IF 2.369
Xiaomei Wang,Zhen Liu,Fa Zhou,Jianhan Huang
Imidazolium salt-incorporated postcross-linked porous polymers, namely, IL-PVB-pc-80%, were developed, and they were evaluated for the adsorption of rhodamine B (RB) and Cd2+ from aqueous solution. After N-vinylimidazole and p-dichloroxylene were inserted in the skeletons, IL-PVB-pc-80% contained both ionized imidazole moieties and plentiful mesopores. The adsorption experiments indicated that IL-PVB-pc-80% has excellent adsorption properties with a maximum capacity of 693.5 mg/g for RB and 373.3 mg/g for Cd2+. The adsorption mechanism revealed that the incorporated imidazolium salts were significantly beneficial for the adsorption.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2019
·
IF 2.931
Zhi-Qiang Zhou,Yuan-Ping Liao,Jing Yang,Shan Huang,Qi Xiao,Li-Yun Yang,Yi Liu
Developing simple and sensitive non-aggregation strategy for detecting Cd 2+ is necessary for improving the selectivity and sensitivity of probe. Here, we establish a simple, rapid and ratiometric strategy for the recognition of Cd 2+ based on the formation of core-shell ZnSe/CdS structure using ZnSe quantum dots (QDs). The transformation from binary ZnSe QDs to core-shell ZnSe/CdS QDs both change the elemental composition and structure of ZnSe QDs, leading to the changes in band gap of ZnSe QDs, which could be observed in the UV–vis spectra. In the detection process, ZnSe QDs only possess absorption peak at 343 nm, the formation of ZnSe/CdS after the addition of Cd 2+ leads to the appearance of the new peak at 397 nm, while other heavy metal ions could not cause the appearance of new absorption peak. Therefore, this strategy shows good selectivity for Cd 2+ detection. Based on this strategy, the limit of detection (LOD) for Cd 2+ is 11 nM by UV–vis spectroscopy with a desirable relation of linearity (R 2 = 0.999) between A 397 /A 343 and Cd 2+ contents, which is superior to the LOD of most reported nanomaterials . The response time for Cd 2+ detection is as short as 60 s, which is suitable for rapid detection. This ratiometric probe has also been applied to the detection of Cd 2+ in tap water samples, the recovery of Cd 2+ was between 94.9% and 105.6% for tap water samples, indicating the high accuracy of our ratiometric assay. Our strategy not only provided a new method for detecting Cd 2+ , but also put forward an implication that the band energy changes of QDs caused by heavy metal ions can be applied in the selective and sensitive detection of heavy metal ions.
研究领域:
分析化学
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环境科学
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材料科学
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DOI
PubMed
高影响因子
JOURNAL OF FLUORESCENCE
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2024
·
IF 2.6
Liao Shihua,Xiang Jiamei,Wu Shaogui
This study presents a facile one-pot solvothermal synthesis of high-performance green fluorescent carbon dots (G-CDs) using o-phenylenediamine and ethylenediamine as precursors. The G-CDs show excellent optical, temporal, and chemical stability. Notably, they exhibit the highest quantum yield of 24.2% in ethanol and a strong green emission peaking at 546 nm under 440–490 nm excitation. In addition, G-CDs have outstanding salt resistance and multi-solvent compatibility. Due to its bright photoluminescence, G-CDs can be used as a secure ink for anti-counterfeiting. More remarkably, Cd 2+ ions can efficiently quench the fluorescence of G-CDs with a detection limit of 0.152 µmol/L, enabling accurate quantification of Cd 2+ in water systems. The simple synthesis of high-performance G-CDs expands their applicability in sensing and bioimaging.
研究领域:
材料科学
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分析化学
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环境科学
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DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Yinggui Zhu,Min Zhao,Xiaojuan Hu,Xiaofang Wang,Ling Wang
In this paper, we report a novel rare earth metal complex with the weak ligand of aromatic sulphonic acid (pyridine-3-sulfonic acid, 3-pSO 3 H), and characterized by FT-IR, UV–vis, energy-dispersive X-ray spectroscopy (EDX), electrochemiluminescence spectra, etc. Then an excellent electrochemiluminescence (ECL) signal was observed with K 2 S 2 O 8 as the coreactant in NaAc-HAc buffer solution. For another thing, the electrochemical properties of the compound have been thoroughly investigated in acetonitrile solution, the possible ECL reaction mechanism was proposed as well. Furthermore, a simple and straightforward ECL platform was reported for sensitive and selective detection of Cd 2+ due to the effective quenching after addition of Cd 2+ . Other heavy/transition metal ions do not interfere with the sensing. The limit of detection is determined as 0.13 nM, the results suggested that as-prepared complex could be a promising material for developing ECL senors to detect the Cd 2+ rapidly indwell in environmental and practical samples.
研究领域:
分析化学
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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
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2016
·
IF 2.567
Lilu Qin,Liangguo Yan,Jian Chen,Tiantian Liu,Haiqin Yu,Bin Du
The amino-functionalized magnetite/kaolin clay (MKC) was synthesized via a simple solvothermal method and used to remove Pb2+, Cu2+, and Cd2+ from aqueous solutions. In comparison, the kaolin clay (KC) and MKC were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, and scanning and transmission electron microscopy with energy dispersive spectrometry. The results indicated amino-functionalized MKC was formed with Fe3O4 particles adhering to the surface by interactions with negatively charged KC. The optimal experimental conditions were evaluated, and the adsorption performance of MKC for Pb2+, Cu2+, and Cd2+ was far better than that of KC. This was mainly caused by adding an amino group, in which the amino group displayed complexing ability toward metal ions. In kinetic data representation, the pseudo-first-order, pseudo-second-order, and Elovich models were employed, and the second one gave the better fitting. Langmuir, Freundlich, and Dubinin–Radushkevich models were chosen for isotherm data correlation, of which the first one showed better suitability. The X-ray photoelectron spectroscopy analysis of MKC before and after adsorption further revealed that the adsorption mechanisms of Pb2+, Cu2+, and Cd2+ could be a combined reaction of complexation between functional groups and metal ions and electrostatic attraction. In addition, MKC can be rapidly separated using only a magnet after the adsorption process.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
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2020
·
IF 6.182
Liping Man,Quanlong Xu,Wenhao Li,Wei Chen,Weiwei Zheng,De-Kun Ma
Oxygen vacancies (OVs) can adjust surface and electronic structures of materials and behave as active sites, extend spectral responsive range, and promote the transfer and separation of photogenerated carriers. Therefore surface properties and photocatalytic activities of materials can be enhanced via the incorporation of OVs . However, the influences of OV concentration inside a material on its adsorption ability for heavy metal ions associated with surface and photocatalytic activities under different atmospheres are still unexplored. In this work, in order to obtain highly efficient adsorbents and photocatalysts, rose-like Bi 2 O 2 CO 3 hierarchical microspheres with rich OVs (Bi 2 O 2 CO 3 -ROVs) and deficient OVs (Bi 2 O 2 CO 3 -DOVs) were synthesized through a facile hydrothermal route and H 2 O 2 oxidation treatment, respectively. Bi 2 O 2 CO 3 -ROVs hierarchical microspheres showed 2.4-times larger adsorption capacity than Bi 2 O 2 CO 3 -DOVs counterparts. The former also showed significantly enhanced photocatalytic activity for Rodamine B (RhB) degradation in aqueous solution under air, N 2 , and Ar atmospheres than the latter, especially under anaerobic conditions. Our work demonstrated that OV engineering could provide a new strategy for enhancing adsorption capability and photocatalytic activity under both aerobic and anaerobic conditions of materials.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Cang Zhang,Ling He,Junhao Li,Kunpeng Shi,Peng Chang,Yujie Zheng,Yong Yang,Dacheng Zhou,Jianbei Qiu
Low-dimensional halide perovskites, as distinguished members of the perovskite family, have garnered significant attention due to their exceptional optical properties. However, strategies for dimensional phase-structure transition using low-dimensional precursors remain underexplored. Herein, a room-temperature two-step supersaturation recrystallization (SR) method was developed. The precursor perovskite Cs 3 Sb 2 Cl 9 was first synthesized, followed by the modulation of its luminescence properties. Subsequently, it was found that the addition of 1 mol CsCl and 1 mol MnCl 2 ·4H 2 O successfully yielded the two-dimensional (2D) metal halide perovskite Cs 4 MnSb 2 Cl 12 . Specifically, Mn 2+ ions were incorporated as luminescent centers, where equimolar CsCl and MnCl 2 ·4H 2 O (1 mmol each) induced a 2D phase-structure transition, enabling effective emission control. To address the weak orange-red emission of Cs 4 MnSb 2 Cl 12 , Cd 2+ was strategically doped to form Cs 4 Cd x Mn 1- x Sb 2 Cl 12 series. With increasing Cd 2+ content, non-monotonic luminescence enhancement was observed, reaching maximum intensity at x = 0.8. This is attributed to the Cd 2+ doping, which weakens the Mn–Mn coupling and breaks the symmetry of the [MnCl 6 ] 4− octahedra, thereby converting the parity-forbidden d–d transition of Mn 2+ into a partially spin-allowed transition and enhancing the Mn 2+ emission. Simultaneously, the improved crystallinity reduces the defect density, thus diminishing non-radiative decay via defect sites and ultimately leading to enhanced luminescence efficiency. This work enriches synthesis strategies for 2D metal halide layered perovskites and provides a novel approach for luminescence control of Sb-based systems.
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高影响因子
ANALYST
·
2022
·Vol. 147
·期 23
·5437-5444
·
IF 5.227
Shan Luo,Xianwen Kan
A new kind of internal reference probe was developed to construct a ratiometric electrochemical sensor for accurate and sensitive Cd2+ detection. AuPt nanoclusters (AuPt NCs) were synthesized and then evenly distributed on reduced graphene oxide (rGO) to form a nanocomposite (AuPt–rGO), which showed peroxidase-like activity and catalyzed the oxidation of o-phenylenediamine (OPD) to 2,3-diaminophenazine (DAP) in the presence of H2O2. It was found that DAP was further reduced on the electrode with a constant current intensity whether Cd2+ was added or not, which enabled it to function as an excellent internal reference probe. Thus, the ratio between the reduction currents of Cd2+ and DAP (iCd2+/iDAP) was proposed to monitor Cd2+ based on the ratiometric strategy. Additionally, the high surface area and good conductivity of AuPt–rGO endowed the sensor with enhanced sensitivity. A wide linear range and a low limit of detection were measured at 5.0 × 10−8–1.0 × 10−4 mol L−1 and 3.1 × 10−8 mol L−1, respectively. Compared with the single signal sensors, this ratiometric sensor presents more accuracy and reliability in the detection of Cd2+, facilitating the quantification of Cd2+ concentration in different water samples with good recoveries. The novel internal reference probe proposed here shows great possibilities for accurate and sensitive Cd2+ detection based on the ratiometric strategy.
研究领域:
分析化学
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环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
ACS Omega
·
2025
·
IF 4.3
Mengfan Duan,Zhuo Wang,Weiping Zhu,Yufang Xu,Xuhong Qian
The recent discovery of heavy metal pollution in Chinese herbs has raised serious concerns for both human health and the environment. Researchers’ attention has been drawn to the toxicity and bioaccumulation of heavy metal ions. In this paper, a new technical method for preparing ethylene glycol-bis (β-aminoethyl ether)-N,N,N′,N′-tetra acetic acid (EGTA)-functionalized cotton fiber was innovatively proposed, and on this basis, heavy metal ions were successfully removed. First, the surface of cotton fiber (FC) was modified with amino group by reactive dye dyeing method to obtain FN (amino-modified cotton fiber). Subsequently, EGTA anhydride was grafted onto FN to obtain FNE (EGTA-modified cotton fiber). The interaction between materials and metal ions was systematically studied by isothermal titration calorimetry and other methods. The results showed that the adsorption capacity of FNE for Cd2+, Pb2+, and Hg2+ could reach 18.87, 25.84, and 6.69 mg/g, respectively. More importantly, FNE can be reused at least five times in an acidic environment. Furthermore, it is possible to efficiently eliminate heavy metal ions from Chinese herb extracts without compromising the active ingredients. This research provides a brand-new idea and method for solving the problem of removing heavy metal ions from Chinese herb extracts.
研究领域:
环境科学
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材料科学
·
生物学
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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）