SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Bingbing Liu,Suying Dong,Peiying Li,Shengpeng Su,Wenjuan Wang,Shuzhen Yang,Yanfang Huang,Hu Sun,Guihong Han
Indium (In) is a typical critical metal, and the recycling of waste In-Tin oxide (ITO) target can alleviate the In resource supply scarcity. The dismantling and preprocessing of waste ITO targets inevitably introduce metallic impurities, posing significant challenges for In recovery, particularly the separation of In from Sn and the removal of other impurities. This study developed an integrated hydrometallurgical process to prepare high-purity nano-In 2 O 3 from high-impurity waste ITO, highlighting on the leaching and separation mechanisms of In, Sn, Al, and Mo. The process consists of HCl leaching for Mo separation, selective sulfide precipitation for In/Sn separation, TOA/TBP synergistic extraction for In/Al separation, and calcination for nano-In 2 O 3 preparation. Under optimal conditions, HCl leaching extracted over 94% of In, Sn, and Al while selectively suppressing Mo dissolution to below 13%. The HCl leaching, sulfide precipitation, and solvent extraction mechanisms are also discussed in this study. The final In 2 O 3 product was 99.98% pure, with about 25 nm average particle size and 77.8% overall In recovery. This work provides an efficient route for high-purity nano-In 2 O 3 production from high-impurity wastes.
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Applied Materials Today
·
2024
·
IF 7.2
Le Huy Thai,Le Thi Thanh Nhi,Truong Chau Giang,Nguyen Minh Hiep,Truong Quang Trung,Tran Quang Hung,Le Hoang Sinh
A new 3D printed multicolor Prussian blue-viologen inorganic-organic hybrid electrochromic device was successfully developed using digital light processing. Photocurable 1-(2 cyanophenyl)-1′-(2-hydroxyethyl)-[4,4′-bipyridine]-1,1′-diium (CPHEV)-based ionogel was printed on ITO glass as an electrochromic layer. The thin film of Prussian blue (PB) was electrodeposited on another ITO glass as an ion storage layer. With PB thin film, the ECDs exhibited a bleaching time 330 times faster than that of ECDs without PB. The ECD showed excellent electrochromic performance with a high color contrast ratio of 93.4 % at -2.5 V with a pulse width of 5 s. Moreover, the ECDs also exhibited multi-coloration in L*a*b* color space with the highest different color points (ΔE* ab ) value of 75.2 between the bleaching state and coloring state. A high coloration efficiency of the ECD was obtained at 296 cm 2 C -1 corresponding to 60 % of a full optical switch at -2.5 V. The 3D printed ECD was successfully demonstrated using digital light processing (DLP) with high dimensional accuracy and resolution.
研究领域:
材料科学
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电化学
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纳米技术
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光电技术
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CERAMICS INTERNATIONAL
·
2026
·
IF 5.6
Qi Cheng,Ye Yang,Chengzhang Chen,Xinyu Ji,Ying Du,Jia Li,Weijie Song
In order to improve the electrochromic properties, especially, the long-term cyclic stability, for the sputtered WO 3 film, various film annealing treatments including the substrate heating during film deposition and also the post-treatment in muffle furnace or in rapid thermal annealing (RTA) facility are usually adopted. However, these traditional annealing techniques have the obvious limitations in high cost, poor operational convenience and low thermal utilization efficiency. Herein, an in-situ electrical annealing initiated by the intrinsically attached ITO transparent electrode is proposed to directly anneal the contacted room-temperature-sputtered Nb-doped WO 3 (WNO) electrochromic film. After a systematic exploration on the in-situ electrical annealing parameters, the perfect temperature and time are screened out as 250 °C and 10 min, respectively. The annealed film at this point owns an outstanding cyclic stability, i.e., after 3000 electrochemical cycles, the light modulation keeps almost unchanged from 60.5 % to 59.9 %. The much denser and more robust microstructure resulted from the in-situ electrical annealing is responsible for such a higher electrochemically cyclic stability. Moreover, the laminated electrochromic device made of the in-situ electrically annealed WNO film is found to operate well. This work firstly demonstrates that the in-situ electrical annealing is practically viable for the treatment of room-temperature-sputtered electrochromic film.
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MICROCHIMICA ACTA
·
2019
·Vol. 186
·期 9
·1-7
·
IF 5.479
Zhang Bing,Jia Yejing,Wang Jing,Hu Xing,Zhao Zhihuan,Cheng Yan
A sensitive photoelectrochemical (PEC) immunoassay for the carcinoembryonic antigen (CEA) is described that is based on the use of C 3 N 4 -BiOCl semiconductor on an ITO electrode. The photocurrent of the modified electrode was measured under visible light illumination. It increased in presence of L-cysteine due to rapid separation of the photoexcited electrons and holes. A sandwich-type immunoassay in a 96-well microtiter plate format used CuO nanoparticles as label for the secondary antibody. The Cu 2+ is released from the CuO in the sandwich complex by treatment with acid. The free Cu 2+ combined with both the cysteine and the electron receptors of C 3 N 4 and BiOCl. Under optimal conditions, this dual action immensely decreases the photocurrent of the PEC system, and the response is inversely proportional to the CEA concentrations from 0.1 pg mL −1 to 10 ng mL −1 at the working voltage of 0 V (vs. SCE). The detection limit is 0.1 pg mL −1 , and the method is exhibited satisfactory selective, repeatable and stable.
Schematic representation of an immunoassay based on cysteine-assisted C 3 N 4 -BiOCl photoelectrochemical platform. CuO nanoparticles were utilized as labels in immunocomplex to release Cu 2+ in acidic condition. Carcinoembryonic antigen in sample was detected sensitively by dual function of Cu 2+ with cysteine and C 3 N 4 -BiOCl semiconductor.
研究领域:
生物医学工程
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分析化学
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肿瘤学
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INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
·
2023
·
IF 2.6
Lili Miao,Zheng Li,Yu Chen,Yiming Gao,Junwei Di
A sensitive photoelectrochemical biosensor was constructed for the detection of chlorpyrifos. The sensor was prepared on indium tin oxide (ITO) electrode using photoelectric material bismuth vanadate (BiVO4) and acetylcholinesterase (AChE). It is found that the photocurrent of ITO/BiVO4 electrode was largely dependent on its treatment temperature. The highest anodic photocurrent response of the ITO/BiVO4 photoelectrode was obtained after the treatment at 300°C. The thiocholine, produced in the catalytic reaction at ITO/BiVO4/AChE electrode surface, can greatly enhanced the anodic photocurrent. In addition, the adsorption of chlorpyrifos on the surface of the AChE caused a decrease in the intensity of the photocurrent. Under the optimisation of experimental conditions, the decrease of the photocurrent showed a good linear range from 1 pM to 10 nM under irradiation of visible light. The detection limit is calculated as 0.25 pM with a 10% inhibition rate. The ITO/BiVO4/AChE photoelectrode exhibited high sensitivity, acceptable stability and good reproducibility. The biosensor can be provided to the potential applications for detection of pesticide residues in food.
研究领域:
分析化学
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环境科学
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生物传感器
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农药残留分析
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SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Jiajing Xu,Weiqiang Yang,Jiancong Ni,Qingxiang Wang,Zhenyu Lin
Electrochemiluminescence (ECL) arises from the collisional annihilation between the electro-excited luminophore and co-reactant. Most ECL-based bioassays require extensive free co-reactants that collide with luminophores randomly. Herein, the N,N-dimethylaniline (DMA) group was electro-grafted on the ITO electrode surface as the bottom co-reactant layer, and the vertically ordered mesoporous silica film (VMSF) was prepared as the upper layer to regulate the accessibility of Ru(bpy) 3 2+ . Thus, the dual-layer functionalized VMSF/N-ITO was newly built for the controllable ECL study. Relevant conditions, including the DMA electro-grafting, VMSF thickness, buffer concentration and pH value, were discussed to improve the ECL efficiency. Based on the VMSF/N-ITO platform, a homogeneous ECL bioassay was developed for miRNA-21 detection. The target nucleotide sequence induced the hybridization chain reaction (HCR) of probes H1 and H2 to absorb free Ru(bpy) 3 2+ as much as possible. Residual Ru(bpy) 3 2+ permeated the VMSF nanochannels to collide with the DMA co-reactant in producing an ECL response. There was a linear relationship between ∆ECL intensity and logarithmic concentration of miRNA-21 in the 1 fM ∼ 100 pM range, and the detection limit was 0.25 fM. The developed approach was probes immobilization-free, highly sensitive, and anti-interference, opening a new avenue for ECL-based bioassays.
研究领域:
分析化学
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生物化学
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纳米技术
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生物传感器
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2025
·
IF 5.4
Xiangwen Lv,Anruo Luo,Xiong Tong,Jianhua Chen,Sheng Jian,Hejie Ouyang
The development of environmentally benign depressants with high selectivity remains a critical challenge in sustainable copper-molybdenum flotation separation. To overcome the limitations of conventional toxic reagents (e.g., cyanides and sulfides), this study introduces 2-iminothiazolidin-4-one (ITO) as a novel chalcopyrite depressant. Through integrated experimental characterization and density functional theory (DFT) simulations, we systematically investigated ITO's selective depression mechanism. Micro-flotation experiments confirmed ITO's ability to preferentially suppress chalcopyrite while maintaining molybdenite floatability. Surface analysis via Fourier-transform infrared spectroscopy (FT-IR), time-of-flight secondary ion mass spectrometry (TOF-SIMS), X-ray photoelectron spectroscopy (XPS), and density functional theory (DFT) demonstrated that the thiazolidine (-N-C S) and imino (=NH) groups coordinate with surface copper/iron (Cu/Fe) ions to form stable chelates on chalcopyrite, exhibiting stronger adsorption stability than ethyl xanthate. In contrast, only weak physical adsorption occurs on molybdenite surfaces. The carbonyl group (C O) was further found to enhance chalcopyrite hydrophilicity through hydrogen-bonding interactions with water molecules, as supported by contact angle measurements. This work establishes a molecular design strategy for green flotation reagents by leveraging functional group synergism, providing fundamental insights into mineral surface reactivity regulation for strategic metal resource recovery.
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ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yonggang Zhao,Li Zhang,Mingzhi Lv,Chaohui Jiao,Pu Cheng,Yujun Fu,Junshuai Li,Qiming Liu,Deyan He
Compared with conventional transparent conductive indium tin oxide (ITO) films, poly(3,4-ethylenedioxythiophene):poly (styrenesulfonic acid) (PEDOT:PSS) as a conductive polymer material has been diffusely applied in organic optoelectronic devices. However, its optoelectrical properties need to be further improved. Therefore, a simple and universal approach with introducing ITO nanoparticles (NPs) was proposed to improve the optoelectrical properties of PEDOT:PSS thin films. The results show that the vertical conductivity (σDC⊥) and average transmittance (from 300 to 1200 nm) of PEDOT:PSS films were enhanced about 26.8 and 6.3%, respectively. Crystalline silicon (c-Si)/organic heterojunction solar cells (HSCs) with PEDOT:PSS/ITO NP hybrid films were fabricated and performances led to further improvement. The spatial distributions of relative electrical field intensity and the carrier generation rate of the HSCs under the standard AM 1.5 G condition were simulated, which were in good agreement with the experimental conclusions.
研究领域:
材料科学
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光伏技术
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纳米科技
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光电子学
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聚合物物理
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LANGMUIR
·
2025
·
IF 3.9
Xinxin Li,Yicheng Wang,Yang Li,Huizhong Han,Emad Uddin,Chong Liu,Jingmin Li
This paper proposes a smartphone-based electrochemical detection instrument, combined with a microfluidic device using Microelectromechanical systems (MEMS) technology integrating a thin-layer flow cell and a modified ITO electrode to successfully construct a portable multiple metal ions detection system. This effectively addresses the issues of poor portability, complex operation, and strong reliance on the laboratory environment of traditional detection equipment. The electrochemical detection instrument realizes the highly sensitive detection of metal ions through the integrated hardware circuit design and the collaborative work of software algorithms. The hardware circuit is based on an STM32 microcontroller as the core, combined with a constant potential circuit and low-pass filtering circuit, which realizes high-precision acquisition of weak current signal and anti-interference processing, and the low-pass filtering makes the signal-to-noise ratio of cyclic voltammetry curves significantly improved. The application (APP) software for smartphones was developed to improve the data quality based on cubic spline interpolation and smoothing algorithm, and the Levenberg–Marquardt nonlinear fitting algorithm was used to optimize the parameters of the model so that the R2 value of data fitting was more than 0.99, which improves the analytical accuracy and ensures the reliability of the measurement. Further, a microfluidic device modified by single-walled carbon nanotubes (SWCNTs)/conductive carbon black (CB) was devised and built, combined with a detection instrument with a fluidic control unit to promote sample diffusion and enhance sensitivity. According to the results, the detection limits of the system for the metal ions, Cu, Pb, and Cd were 88 μg/L, 0.73 μg/L and 2.3 μg/L, respectively, which verified its effectiveness and potential application in the immediate detection of metal ions and can meet the needs of the point-of-use (POU).
研究领域:
分析化学
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生物传感器
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环境监测
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微机电系统（MEMS）
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ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Yanfu Wan,Chunyan Yang,Xingquan Zhu,Xinyu Zhang,Junfeng Tong,Jianfeng Li,Zhilong Qian,Xiang Ma,Heng Zhang
PEDOT:PSS is widely employed as a hole injection layer (HIL) in quantum dot light-emitting diodes (QLEDs). However, its hygroscopicity and acidity can lead to electrode corrosion and compromise device stability. Here, high-performance HIL-free QLEDs are demonstrated, enabled by carbazole-based self-assembled monolayers (SAMs) functioning as an interfacial modification layer (IML) on ITO. The SAMs boost ITO work function for direct hole injection and use shallow low unoccupied molecular orbital level (LUMO) to curb leakage. Consequently, the QLED incorporating 2-(9H-carbazol-9-yl)ethyl phosphonic acid (2PACz) IML achieves high external quantum efficiency (EQE) of 31.33%, an excellent brightness of 430 900 cd m − 2 and a long T 95 operational lifetime of 5971 h at 1000 cd m −2 , all of which significantly outperforming the PEDOT:PSS device. To the best of the knowledge, these performances are the highest ever reported for HIL-free QLEDs. Furthermore, the 2PACz-based QLEDs can also sustain high EQE (≈20%) at extremely low current densities of 0.015 mA cm −2 (3.6 cd m − 2 ), which is very beneficial for displays to achieve high efficiency at low brightness. This work paves the way for stabler, high-performance QLEDs and faster commercialization.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
器件物理
·
量子点
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CRYSTENGCOMM
·
2023
·Vol. 25
·期 15
·2237-2242
·
IF 3.1
Cunxin Li,Kaijia Xu,Lanjun Cheng,Zhichuan Wu,Yinyin Qian
Group I–V–VI2 nanocrystals have been considered as potential candidates in the field of optoelectronics due to their highly tunable semiconductor characteristics. AgSbTe2, one of the emerging group I–V–VI2 nanocrystals with optical phase-change properties, a high light absorption coefficient and wide spectral response, is attractive for eco-friendly photodetector devices. However, a colloidal synthetic route for obtaining highly crystalline AgSbTe2 nanocrystals with low toxicity precursors, which is vital to high-performance solution-processed photodetector devices, is still rare. Herein, we investigate the colloidal synthesis of quasi-cube AgSbTe2 nanocrystals from the reaction of commercially available AgNO3 with Sb(Ph)3 in oleylamine at 190 °C, followed by the injection of a tellurium source, which was prepared by directly dissolving TeO2 in 1-dodecanethiol. Simple AgSbTe2/ITO heterostructure photodetectors were fabricated by a low-temperature colloidal synthetic route in combination with the spin-coating technique, which exhibit good photoresponse in a wide range from 405 to 980 nm with fast response times (0.49 and 0.58 s) and excellent stability. This work suggests that ternary silver-based I–V–VI2 compound nanostructures have great potential for high-performance optoelectronic applications.
研究领域:
材料科学
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纳米技术
·
光电子学
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Frontiers in Chemistry
·
2023
·
IF 5.5
Chen Dong,Luo Xuan,Xi Fengna
Sensitive detection of tumor biomarkers is crucial for early diagnosis and prognosis evaluation of cancer. Owing to no need of labelled antibody, formation of sandwich immunocomplexes and additional solution-based probe, probe-integrated electrochemical immunosensor for reagentless detection of tumor biomarkers is highly desirable. In this work, sensitive and reagentless detection of a tumor biomarker is realized based on fabrication of a probe-integrated immunosensor by confining redox probe in electrostatic nanocage array modified electrode. Indium tin oxide (ITO) electrode is employed as the supporting electrode because it is cheap and easily available. The silica nanochannel array consisted of two layers with opposite charges or different pore diameters was designated as bipolar films (bp-SNA). In this work, Electrostatic nanocage array is equipped on ITO electrode by growth of bp-SNA with two layered nanochannel array having different charge properties including a negatively charged silica nanochannel array (n-SNA) and a positively charged amino-modified SNA (p-SNA). Each SNA can be easily grown with 15 s using electrochemical assisted self-assembly method (EASA). Methylene blue (MB) is applied as the model electrochemical probe with positive charge to be confined in electrostatic nanocage array with stirring. The combination of the electrostatic attraction from n-SNA and the electrostatic repulsion from p-SNA endows MB with highly stable electrochemical signal during continuous scanning. When the amino groups of p-SNA are modified using the bifunctional glutaraldehyde (GA) to introduce aldehydes, the recognitive antibody (Ab) of the most commonly used tumor biomarker, carcinoembryonic antigen (CEA), can be covalently immobilized. After the non-specific sites are blocked, the immunosensor is successfully fabricated. As the formation of antigen-antibody complex decreases electrochemical signal, the immunosensor can achieve reagentless detection of CEA ranged from 10 pg/mL to 100 ng/mL with a low limit of detection (LOD, 4 pg/mL). Determination of CEA in human serum samples is realized with high accuracy.
研究领域:
生物医学工程
·
分析化学
·
癌症诊断
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DOI
PubMed
高影响因子
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