MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yiting Yang,Huimin Jia,Gaotian Bian,Xianmin Zeng,Peilong Shi,Shunan Lu,Mengkai Jiang,Weiwei He
Chlorpyrifos (CPF) is one of the representative organophosphorus pesticides (OPs) that posing huge risks to both human health and ecological integrity. Building a highly sensitive detection platform to achieve accurate detection of trace CPF is of vital importance for real-time evaluation of environmental and food safety. In this work, a novel organic photoelectrochemical transistor (OPECT) with TiO 2 /CdS heterojunction serving as the photogating module against the (3,4-ethylenedioxythiophene) poly (styrenesulfonate) (PEDOT:PSS) channel was developed for the high sensitive and selective detection of CPF. The TiO 2 /CdS heterojunction significantly improves the light absorption and charge separation efficiency of gate (G), and drives the directional migration of cations in the electrolyte to the channel under light conditions, reducing the channel carrier concentration. The C=N and P=S in CPF chelate with cadmium (Cd) ions, blocking the electron transfer between electron donor and gate, resulting in changes in effective gate voltage, which in turn leads to changes in channel current, and realizing highly sensitive and specific detection of CPF. The platform demonstrated a good linear response in the detection range of 100 ng/mL to 0.1 pg/mL, with detection limit as low as 2.2 fg/mL. This work provides an efficient and sensitive detection platform for the design of novel organic photochemical transistors for the detection of low concentration organophosphorus pesticides.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jiaojiao Zhang,Tianyi Zhang,Da Teng,Zihui Meng,Lili Qiu
Photocatalytic oxidation technology using solar energy is an effective strategy to solve environmental pollution and energy shortage. To avoid angle dependence of traditional photonic crystal photocatalysts and address the limitations of high charge recombination rate and low light utilization of TiO 2 , this study proposed a novel inverse opal TiO 2 /CdS photonic crystal beads (IO TiO 2 /CdS PCBs) photocatalyst. By leveraging the synergistic coupling of PCBs’ slow light effect and TiO 2 /CdS heterojunction, the photocatalytic activity was significantly enhanced. The results revealed that the PCBs matching the blue edge with TiO 2 ′s electronic band gap (IO TiO 2 -140 PCBs) exhibited the highest apparent rate constant of 0.01901 min −1 . By introducing CdS to form a heterojunction with TiO 2 , the photocatalytic performance was further improved by effectively inhibiting the recombination of photogenerated carriers. The degradation rate of RhB reached 96.6 % in 60 min, outperforming that of IO TiO 2 at 65.1 %, with the rate constant increasing by 3.1 times. Electron spin resonance and trapping experiments indicated that h + was the main active specie, and the possible reaction mechanism path was proposed. The combination of “extrinsic” modifications by doping CdS and “self-structural” modifications by shaping TiO 2 into periodic IO PCBs structure provided a systematic insight on the design of novel photocatalysts.
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
SOLAR ENERGY
·
2022
·
IF 7.188
Wen-Wei Lin,Ning-Wei Wang,Ze-Ying Lan,Zhi-Ping Huang,Li-Mei Lin,Qing-Ying Ye,Shui-Yuan Chen,Gui-Lin Chen
Copper antimony sulfur (CuSbS 2 ) possesses a band gap of about 1.5 eV, high absorption coefficient of > 10 4 cm −1 and abundant compositions, which is considered as one of the potential photovoltaic absorbers. In this work, we propose a facile ion-exchange assisted chemical bath deposition (IEACBD) method, which uses Cu + to replace Sb 3+ from the matrix of Sb 2 S 3 and then combine into CuSbS 2 alloy. Through systematic study, we found that this ion-exchange is a simultaneous interdiffusion process of Cu + and Sb 3+ ions, which enables a uniform mixture of those two elements. But it also inevitably produces a Sb 2 O 3 by-product on the surface of the film because of the alkaline environment of this chemical bath. To further remove it, we introduce a mild etching process with BDCA solution for Sb 2 O 3 and then obtain a high-quality CuSbS 2 . Finally, we assemble an inorganic CuSbS 2 solar cell with the architecture of FTO/TiO 2 /CdS/CuSbS 2 /Carbon/Ag, and delivering a photoelectric conversion efficiency of 0.75 %. This enriches the preparation method of CuSbS 2 thin film and also provides guidance for the synthesis of the similar multiple chalcogen compounds.
研究领域:
材料科学
·
太阳能
·
化学
·
纳米技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Wenjie Guo,Yinghua Lan,Jien Niu,Wenwen Chen,Yanhui Zhang,Guoping Li,Juan Xu
A series of TiO 2 -CdS composites were prepared at room temperature using a one-step precipitation method, and an appropriate loading ratio was determined. Compared with pure TiO 2 and CdS, the composites exhibited superior photocatalytic degradation performance in the degradation of ciprofloxacin (CIP) and the reduction of Cr(Ⅵ). The incorporation of an appropriate amount of TiO 2 effectively suppressed the agglomeration of CdS nanoparticles and enhanced interfacial electron transfer, thereby significantly improving photocatalytic efficiency. Furthermore, a metal ion-mediated redox synergistic system was successfully constructed, achieving efficiency breakthroughs in the degradation of bisphenol A (BPA) and ibuprofen (IBU), which exhibited negligible photocatalytic activity under conventional conditions. The influence of different heavy metal ions on the photocatalytic degradation performance of organic pollutants were discussed. This provides a robust theoretical basis for the removal and resource recovery of refractory organic compounds.
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Pai Peng,Jie Ren,Shuxiang Wang,Jing Huang,Li Zou,Pingping Yang,Xiangui Pang,Ming Zhang,Youyi Su,Wanqi Luo,Wenyan Tao,Jiale Xie
The severe photocorrosion of cadmium sulfide (CdS) restricts its practical application for solar hydrogen production. Although remarkable progress has been achieved with an overlayer strategy for isolating the CdS surface, the lifetime of CdS-based photoanodes is still far from the actual requirements. Herein, a hybrid overlayer of defective Ni-MOF and NiO nanoparticles has been developed through the chemical bath deposition method with postannealing. This hybrid overlayer of Ni-MOF-d is coated on the surface of the TiO2/CdS type-II heterojunction. The composite photoanode exhibits a photocurrent density of 4.41 mA cm–2 at 1.23 VRHE, which is 3.47- and 1.32-fold that of CdS and TiO2/CdS, respectively. The Ni-MOF-d overlayer gives rise to a negative shift of the onset potential by 59.51 mV. After a long-term stability test of 11 h, a photocurrent retention of 70% is observed, which is among the most robust CdS-based photoanodes. The kinetics studies reveal that the performance improvements can be attributed to the multiple functions of the Ni-MOF-d hybrid overlayer, including isolating the CdS surface from the electrolyte, cocatalyzing the electrode oxidation processes, passivating the surface defect states of CdS, and facilitating the charge injection from the photoanode to the electrolyte.
研究领域:
材料科学
·
光催化
·
可再生能源
·
纳米材料
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yinghao Du,Dong Hao,Wei Yan,Jing Xu,Yuee Xie,Xiaohong Yan,Yuanping Chen
To address the limitations of traditional chemical methods and powder catalysts in photocatalysis, this study reports a novel physical vapor deposition (PVD) approach for constructing efficient and recyclable heterojunctions. Using electron-beam evaporation, the amorphous NiO film was deposited onto the surface of chemically synthesized TiO 2 /CdS precursors, ultimately yielding the flexible TiO 2 /CdS/NiO (TCN) multi-composite photocatalyst. The light absorption, charge carrier behavior, and degradation mechanism were investigated through UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), photoelectrochemical testing, and free radical trapping experiments. The prepared TCN composite material achieved a degradation efficiency of 96% for methyl orange (MO) within 60 min of visible-light irradiation, significantly outperforming pure TiO 2 (17%) and TiO 2 /CdS (41%). It also demonstrates broad-spectrum degradation capabilities for multiple antibiotics and exhibits excellent cycling stability. Mechanistic analysis indicates that both a Type-II heterojunction (TiO 2 /CdS) and a p-n heterojunction (CdS/NiO) are formed within the material. The built-in electric fields in both junctions are aligned, thereby synergistically promoting the efficient separation and migration of photogenerated electron-hole pairs. This work provides a new technical pathway and theoretical basis for designing practical, easily recyclable and highly efficient photocatalytic materials that minimize secondary pollution.
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Xinna Gao,Xueyan Wang,Zheng Yang,Yuhua Shen,Anjian Xie
A novel multi-functional yolk-shell SiO 2 @TiO 2 /CDs(y-STCs) nanocomposite with interesting structure of SiO 2 cores, porous TiO 2 shell, and cavities was synthesized by using a simple method. The experimental results indicate that the yolk-shell structure and modification of carbon dots (CDs) play important roles in the enhancement of SERS signals and photocatalytic performance. The y-STCs nanocomposite used as the SERS substrate showed excellent efficiency and reproducibility for the detection of rhodamine 6G (R6G). The detection limit of R6G was shown to be as low as 6 × 10 −8 M. Furthermore, the fabricated y-STCs nanocomposite utilized as the photocatalytst for the degradation of dinitraphenols (DNP) can greatly shorten reaction time to 120 min compared with previous studies, and the DNP degradation rate could reach 96% under simulated sunlight irradiation. The y-STCs nanospheres also possessed excellent cycle stability for the photocatalytic degradation of DNP. Thus, the bi-functional y-STCs nanocomposite may have potential applications in the detection and photocatalytic degradation of organic pollutants.
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
Analytical Methods
·
2015
·Vol. 7
·期 4
·1328-1332
·
IF 1.821
Xiaoyan Yang,Jingyu Li,Junliang Fu
In this article, a label-free photoelectrochemical immunosensor based on a CdS-modified mesoporous TiO2 film has been developed. The CdS quantum dots could be deposited onto the mesoporous TiO2 film by electrochemical deposition, which could enhance the photocurrent intensity in the visible region. Employing specific binding of antigen–antibody, α-fetoprotein (AFP) could be captured on the surface of the modified electrode. Based on the steric hindrances, the photocurrent intensity decreased with the increase in AFP concentration. A linear response from 0.05 ng mL−1 to 20 ng mL−1 was obtained for AFP detection and the detection limit was 0.02 ng mL−1. Moreover, the practical determination of AFP in human serum was also investigated.
研究领域:
分析化学
·
生物传感器
·
纳米技术
·
医学诊断
✓ 已验证
产品关联
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2025
·
IF 4.6
Zhenghao Li,Sheng Xu,Yihua Zhang,Lingli Liu,Jinlong Cui,Zhenxi Wang
To enhance the visible-light catalytic activity and broaden the light absorption range of TiO 2 , a series of three-dimensional hollow sea-urchin-like TiO 2 @CdS composite photocatalysts were synthesized via a one-step hydrothermal method. The microstructure and photoelectrochemical properties of the synthesized TiO 2 @CdS composites were systematically characterized by multiple techniques. The scanning electron microscopy results showed that the pure TiO 2 present the hollow sea-urchin-like structure and the overall morphology of the TiO 2 @CdS composite material is hardly changed. PL results showed that the introduction of CdS quantum dots to TiO 2 matrix to form a heterojunction can effectively improve its photoelectron transfer efficiency and enhance electron-hole separation. The UV–vis results indicated that the introduction of CdS QDs significantly enhanced the visible-light absorption of TiO 2 . The performance for the visible-light-driven degradation of tetracycline hydrochloride (TCH) was systematically investigated. The results showed that the TCH degradation efficiency reached 83.71 % within 1 h of visible-light irradiation and further improved to 93.59 % after 3 h. Moreover, the degradation rate was markedly accelerated under alkaline conditions and the degradation rate can reach 96.82 %. After five consecutive cycles, the TiO 2 @CdS composites exhibited negligible loss in photocatalytic activity, confirming their excellent visible-light catalytic degradation performance and outstanding reusability.
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Qianyi Cheng,Chuyue Qiao,Yu Chen,Shaopeng Fu,Jianxian Zhou,Xiangyu Chen,Zhixun Wang,Jianfeng Li,Lei Wei,Qichong Zhang
The development of high-performance blue-light-sensitive photodetectors for underwater applications faces significant challenges due to the limited absorption range and inefficient charge separation in conventional semiconductor materials. Here, we design a TiO2@CdS core–shell heterojunction that synergistically combines the advantages of both materials, significantly enhancing blue-light absorption (450–495 nm) and charge carrier separation efficiency. The resulting fiber-shaped photoelectrochemical photodetector (FPPD) displays exceptional performance with a high responsivity of 101.87 mA W–1, fast response time of <19 ms, and outstanding mechanical flexibility. Furthermore, our FPPD exhibits biomimetic synaptic functionalities including bilingual responses, short-term plasticity, and low energy consumption comparable to that of biological synapses, enabling neuromorphic information perception and computing capabilities. Practical applications in underwater optical communication, imaging, and human–machine interaction are successfully demonstrated, highlighting the FPPD’s versatility in underwater environments. This work not only advances the design of high-performance underwater optoelectronic devices but also establishes a direct connection between traditional photodetection and emerging neuromorphic computing, laying the groundwork for innovative underwater systems and wearable technologies.
研究领域:
光电子学
·
纳米材料
·
神经形态工程
·
水下通信
·
柔性电子学
✓ 已验证
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）