NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 44
·期 4
·1362-1370
·
IF 3.069
Xingshuang An,Xiaojie Shi,Hui Zhang,Yao Yao,Guangxian Wang,Qingqing Yang,Lianming Xia,Xia Sun
In this paper, a sensitive electrochemical immunosensor modified with graphene oxide–chitosan (GO–CS) and cerium oxide–chitosan (CeO2–CS) using screen-printed electrodes (SPEs) was developed for the determination of aflatoxin M1 (AFM1) in milk. Compared with other electrodes, SPEs are easy for quick detection and no polishing steps are required. Graphene oxide (GO) has strong electrical conductivity and a large specific surface area, which can accelerate the transfer of electrons and fix more anti-AFM1 antibodies (ab-AFM1) on SPEs. Compared with GO, cerium oxide (CeO2) nanoparticles have a smaller diameter, and CeO2 can be uniformly attached to the surface of the GO. Simultaneously, CeO2 has good redox properties and can further accelerate the transfer of electrons, thereby further amplifying the electrochemical signal of the sensor. Chitosan (CS) has strong complexation ability, which can uniformly disperse GO and CeO2. Herein, GO–CS and CeO2–CS gradually modified SPEs to improve their electrochemical response and immobilize more antibodies. The properties of the AFM1 immunosensor were studied via differential pulse voltammetry (DPV) and cyclic voltammetry (CV). Under the optimal conditions, the immunosensor showed great reproducibility and high stability with a detection limit of 0.009 μg L−1. In addition, the immunosensor was successfully utilized for the determination of AFM1 in milk. This immunosensing principle will have broad prospects for the analysis of toxins in food, ensuring the safety of milk and dairy products.
研究领域:
食品安全
·
分析化学
·
电化学
·
毒理学
✓ 已验证
DOI
高影响因子
Solar RRL
·
2021
·Vol. 5
·期 5
·2100036
·
IF 8.582
Jun-Yan Li,Hong-Yan Chen,Yong Jiang,Dai-Bin Kuang
To make full use of solar energy and achieve effective separation of photogenerated carriers, semiconductor heterojunction engineering is becoming increasingly significant nowadays. Herein, Cs x WO 3 /CsPbBr 3 heterojunctions via cosharing the Cs atom are synthesized by a facile acid solution method, which involves the in situ growth of CsPbBr 3 nanoparticles on the surface of Cs x WO 3 nanorods. Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) tests confirm that a high-quality interface with strong interaction between Cs x WO 3 and CsPbBr 3 is constructed successfully. Thus, a direct Z-scheme charge transfer pathway is built in such close-contact heterojunctions, which can not only effectively prevent the recombination of photogenerated carriers, but also preserve the carriers with higher redox abilities, as confirmed by electron spin resonance (ESR) as well as Kelvin probe force microscopy (KPFM). As a proof of concept, the photocatalytic hydrogen production performance of Cs x WO 3 /CsPbBr 3 is evaluated in ethyl acetate, and a 17-fold enhancement in hydrogen production rate as compared with pristine Cs x WO 3 is obtained, verifying the effective charge separation in such heterojunctions. Herein, a new idea for in situ synthesis of high-quality perovskite-based heterojunctions is provided, which will broaden their optoelectrical applications.
研究领域:
材料科学
·
光催化
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS
·
2024
·
IF 2
Xue Yang,Mengyu Lin,Jiumei Chu,Dianquan Dong
The unique properties of cesium compounds have garnered increasing attention, among which Cs 2 Ti 6 O 13 shows great potential for applications. This paper synthesized Cs 2 Ti 6 O 13 (CTO-3) using a template-assisted solvothermal method with cesium carbonate as the cesium source and tetrabutyl titanate as the titanium source. Among them, F127 and hexadecylamine are used as template agents to modulate the surface morphology and hydrophilicity of the precursor. The cesium ion sieve H 2 Ti 6 O 13 (HTO-3) synthesized after hydrochloric acid pickling has a large specific surface area and good hydrophilicity. This structure is conducive to the ion exchange between Cs + and H + , resulting in a fast adsorption rate. It is completed within 2 h, and the adsorption capacity reaches 360 mg/g, which is significantly greater than that of the traditional high-temperature solid-phase method. The adsorption process of Cs + on HTO-3 is more consistent with the pseudo-second-order kinetic equation model, and the adsorption process is chemical adsorption. HTO-3 exhibited good selectivity and cycle stability. At the fifth time of the adsorption-resolution cycle, the adsorption capacity was 87.1 % of the first time.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Shiyu Duan,Nan Tian,Jicheng Zhang,Zhaoxuan Huang,Disheng Yao,Guoyuan Zheng,Jilin Wang,Yanhan Yang,Bing Zhou,Fei Long
Cs-rich FA-Cs perovskites theoretically have good humidity stability, photothermal stability, and suitable band gap for top cells of tandem solar cells. However, the phase separation of Cs-rich FA-Cs perovskite films occurs when the Cs content exceeds 30%, so it is difficult to synthesize pure Cs-rich FA-Cs perovskite films. Here, pure Cs-rich FA-Cs perovskite Cs1–xFAxPbI2Br(0 ≤ x ≤ 0.6) films without any impurity phase are first synthesized by reducing its phase formation energy barrier through assistance of PbI2(DMSO) and PbBr2(DMSO) admixtures. Compared with the pristine CsPbI2Br films, the humidity stability of those films is significantly improved and a remarkably enhanced power conversion efficiency (PCE) of 14.55% in α-Cs0.7FA0.3PbI2Br solar cells is achieved. Meanwhile, after annealing at 140 °C for 1 h or irradiating with ultraviolet light in N2 or dry air for 12 h, no phase separation and band gap change are found in Cs0.7FA0.3PbI2Br. The distributions of the PCE are similar, and the champion PCE of the corresponding Cs0.7FA0.3PbI2Br solar cells remains within 14.24–14.55%. This shows that α-Cs0.7FA0.3PbI2Br has good thermal and ultraviolet radiation stability.
研究领域:
材料科学
·
光伏技术
·
能源研究
✓ 已验证
产品关联
DOI
高影响因子
WATER AIR AND SOIL POLLUTION
·
2024
·Vol. 236
·期 1
·1-15
·
IF 3.8
Li Xiao-fang,Ding Yue,Wang jing,Feng Xiao-qiang
Based on the excellent adsorption, photosensitization and electron transfer ability of biochar, the combination of photocatalyst and biochar is an effective method to improve the overall photocatalytic activity. Hence, a novel efficient CS-biochar/ZnO/TiO 2 photocatalyst with the different content of N-doped porous CS-biochar were constructed and characterized by a variety of testing methods, such as FT-IR, XRD, UV–vis DRS, SEM–EDS, PL, EIS, TPR, LSV. Photocatalytic experiments indicated that all the CS-biochar/ZnO/TiO 2 composites with different CS-biochar content exhibit excellent photocatalytic activity for Rh B degradation. Among them, 63%-CS/ZnO/TiO 2 composite has the best catalytic activity, which 94.5% of Rh B was degraded within 25 min, and the kinetic constant was 0.0993 min −1 , which is about 1.96 and 1.72 times that ZnO (0.0507 min −1 ) and TiO 2 (0.0576 min −1 ), respectively. Moreover, photoelectrochemical experiment results confirmed that CS-biochar/ZnO/TiO 2 greatly enhanced the charge separation process compare with ZnO and TiO 2 . Meanwhile, CS-biochar/ZnO/TiO 2 has excellent stability, and a possible photocatalytic mechanism was put forward.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2023
·
IF 11.2
Hongxu Liu,Junhao Xie,Ziyi Hu,Jingxuan Zhao,Ruijia Wang,Yuchao Qi,Shulin Sun
This work obtained separation membranes with UV-cleaning performance by adding TiO 2 -g-CS/CNTs photocatalyst to the PVDF . The positively charged chitosan (CS) and negatively charged carboxylic carbon nanotube (CNTs-COOH) can be self-assembled into the bilayer structure on the surface of TiO 2 particles through electrostatic attraction. The presence of many hydrophilic groups in CS and CNTs-COOH significantly improves the hydrophilicity of TiO 2 -g-CS/CNTs-PVDF membrane, and helps TiO 2 to be uniformly dispersed on the upper surface. TiO 2 -g-CS/CNTs promote the change of pore structure and expand the flux of the modified membrane to 4.5 times that of pure PVDF . Zeta potential demonstrates that the TiO 2 -g-CS particles successfully attracted CNTs in the PVDF matrix, and the membrane surface was still positively charged. Thus, the combined effect of the positively charged TiO 2 -g-CS and the highly adsorbed CNTs enhanced the retention of the contaminants. More importantly, there is a charge transfer between the grafted CS and TiO 2 interface to obtain a broader light absorption band. The excitation carriers provided by CNTs significantly contribute to the photocatalytic performance after transfer between TiO 2 and CS; thus, TiO 2 -g-CS/CNTs-PVDF produces higher photocatalytic activity for dye molecules (degradation rate > 97 %).
研究领域:
材料科学
·
环境工程
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Zhaofei Liu,Xinyue Wang,Yuhang Wei,Weiwei Xie,Song Li,Zhiming Chen
As a biomarker of endocrine gland diseases, the rapid and accurate determination of dopamine has a great significance. The aim of this study was to improve the dopamine biosensing performance of the Fe 3 O 4 @CS-Au-Lac (laccase immobilized on Fe 3 O 4 @CS-Au nanocomposites) by using the photothermal effect of magnetic carriers. Electrochemical impedance spectroscopy measurements revealed that the Fe 3 O 4 @CS-Au nanocomposites enhanced the electron transfer between laccase and the electrode. The Fe 3 O 4 @CS-Au-Lac biosensor presented an ultra-fast response to substrates, accurately detected dopamine within 0.2 s. Dopamine biosensing assays demonstrated that the Fe 3 O 4 @CS-Au-Lac biosensor possessed high sensitivity, remarkable tolerances towards organic compounds and metal ions, and excellent selectivity and stability. Amperometric curves indicated that the illumination brought a higher current to the biosensor compared to the dark environment. The Fe 3 O 4 @CS-Au-Lac biosensor held a low detection limit of 0.79 μM (S/N = 3) and a broad linear range of 1–1000 μM under the irradiation. Most significantly, the Fe 3 O 4 @CS-Au-Lac biosensor provided reliable results in the photothermal analysis of dopamine in synthetic urine samples. This finding paves the way for using the Fe 3 O 4 @CS-Au-Lac biosensor for photothermal detection of dopamine in biomedical applications.
研究领域:
生物医学工程
·
分析化学
·
纳米材料科学
✓ 已验证
DOI
高影响因子
MATERIALS AND CORROSION-WERKSTOFFE UND KORROSION
·
2025
·
IF 2
Guiqun Liu,Boyu Zhang,Heming Wang,Qisheng Ma,Guanglei Lv,Xiaoli Zhang,Yishan Wu,Ding Li
In the present study, Ni-P-CS composite coating was prepared on Q235 carbon steel surface by electroless plating method. Candle soot (CS) is the soot produced by incomplete combustion of candles, and it is mainly composed of amorphous carbon and carbon nanoparticles. The results show that: the results indicated that the corrosion resistance of the Ni-P deposit improved with the incorporation of candle soot (CS). The electrochemical test of Q235 carbon steel, Ni-P and Ni-P-CS with 3.5% NaCl solution was performed at room temperature. The test results show that the protection efficiency of the new coating (Ni-P-CS) reaches 78.5%. Compared with the Ni-P coating with the protection efficiency of 47.08%, its corrosion resistance increased by 31.42 percentage points. This study demonstrates for the first time that Ni-P-CS composite coating is a feasible method for metal corrosion prevention, with inexpensive raw materials and easy preparation. It provides a novel idea for petroleum, chemical and other metal anticorrosion fields.
研究领域:
材料科学
·
金属防腐蚀
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 108
·期 7
·e20447
·
IF 3.8
Mingyang Zhao,Xiao Chen,Huiping Zhu,Songqin Xia,Yan Ma,Kyle S. Brinkman,Zhenfeng Tong
This study systematically explored the crystal chemistry of Fe-substituted hollandite (Fe-hollandite) solid solutions (Ba x Cs y )(Fe 2 x + y Ti 8−2 x − y )O 16 ( x + y = 1.33) yielding reliable results through meticulous Rietveld analysis of XRD data. Continuous Cs substitution triggered a monoclinic-tetragonal (M-T) phase transition, enhancing structural stability, as evidenced by increased tolerance factor ( t H ). The transition boundary, controlled by t H = .985, determines the symmetry of the hollandite phase. Unit cell parameters and the local bonding environment were refined, indicating enlarged tunnel sizes/cavities with higher Cs content, attributed to a larger ionic radius (Cs + vs. Ba 2+ ). Comparison between Cs/Ba-O bond distances and tunnel cross-section sizes confirmed effective A-site cation immobilization, hindered by oxygen bottlenecks. Additionally, a refined model was proposed and validated to predict lattice constants of Fe-hollandite precisely. Beyond crystal chemistry evolution with Cs substitution, leaching resistance in the same sample suites was assessed. As Cs content increased, normalized elemental release of A-site cations initially decreased until reaching a minimum at intermediate Cs substitution, then rose again. Ba 0.33 Cs 1.0 Fe 1.66 Ti 6.34 O 16 (i.e., HF5) displayed optimal leaching resistance. Variations in leaching resistance might be influenced by the distortion in [BO 6 ] octahedra and the bonding environment of tunnel cations. This comprehensive analysis highlights intricate correlations between crystal chemistry and leaching resistance, offering insights to guide the design of advanced crystalline nuclear waste forms with enhanced corrosion resistance.
研究领域:
材料科学
·
核废料处理
✓ 已验证
产品关联
DOI
高影响因子
Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 13
·4997-5003
·
IF 6.482
Jun Zhou,Ximing Rong,Maxim S. Molokeev,Yulong Wang,Xiangyan Yun,Denghui Xu,Xiong Li
Doping or alloying in perovskites and perovskite variants provides a promising way for modulating the electronic and photoluminescence properties and the structural stability. In this work, a series of yellow-emitting Rb2−xCsxZrCl6:Te4+ solid solution phosphors were prepared by a hydrothermal method, and their broad emission is assigned to the triplet 3P1–1S0 self-trapped excitons (STEs). Upon increasing the alloying ion Cs+, the yellow emission can be greatly enhanced by a stronger Jahn–Teller distortion. Moreover, Cs2ZrCl6:Te4+ shows a high photoluminescence quantum yield (PLQY), and impressive thermal and anti-water stability. This doping–alloying strategy presents a new direction towards designing lead-free, high-performance and stable perovskite derivatives.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 17
·6064
·
IF 3.4
Menghan Duan,Yunpeng Wang,Pingli Zhang,Luchao Du
Organic inorganic perovskite materials have received increasing attention in the optoelectronic field because of their unique properties. The ultrafast dynamics of photogenerated carriers determine photoelectric conversion efficiency, thus, it is feasible to influence the dynamics behavior of photogenerated carriers by regulating A-site cations. This paper mainly used transient absorption spectra (TAS) technology to study the photogenerated carriers relaxation processes of organic–inorganic perovskite CsxMA1−xPbI3materials at different x values. Three sets of time constants were obtained by global fitting at different values of x. The experimental results showed that the crystal structure of perovskite could be affected by adjusting the Cs+doping amount, thereby regulating the carrier dynamics. The appropriate amount of A-cation doping not only maintained the organic–inorganic perovskite crystal phase, but also prolonged the photogenerated carrier’s lifetime. The 10% Cs+doping CsxMA1−xPbI3perovskite has potential for solar cell applications. We hope that our research can provide dynamics support for the development of organic–inorganic perovskite in solar cells.Keywords:Cs+doping MAPbI3perovskite;transient absorption spectra;crystal structure;carriers dynamics
研究领域:
材料科学
·
光电子学
·
太阳能电池研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL PHYSICS LETTERS
·
2020
·
IF 2.029
Hanyang Liao,Ye Li,Haorui Li,Bolin Li,Yuzhi Zhou,Dongbin Liu,Xiaoli Wang
The amidoxime -modified X-type zeolite (AO-XZ) was successfully prepared by using X-type zeolite (XZ) as a carrier, iminodiacetonitrile (IDAN) as a nitrile-based precursor, and loading the amidoxime group onto the XZ. Mesoporous structure of XZ was unchanged after modification and the mechanism of adsorption is ion exchange. The adsorption behavior followed the pseudo-secondary kinetics, indicating that chemical adsorption is dominant. The Langmuir model had a good fitting effect (R 2 ≈ 0.9931), indicating that the adsorption process is dominated by single-layer uniform adsorption, and the maximum adsorption capacity of AO-XZ towards Cs + by Langmuir fitting was 222.2 mg/g. The process of Cs + adsorption by AO-XZ has high adsorption rate (greater than90%) under neutral conditions and common ion competition. Besides, in the dynamic experiment, the adsorption reached the point of failure after 14 h. The above results indicate that AO-XZ has good potential for removing Cs + from radioactive wastewater in future practical applications.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）