OPTICAL MATERIALS
·
2021
·
IF 3.08
Xuyang Li,Zongxue Yu,Liangyan Shao,Xiaofang Feng,Haojie Zeng,Yuchuan Liu,Runxuan Long,Ximei Zhu
In order to effectively solve the two major problems of photocatalyst recovery and membrane fouling , this research combines photocatalyst and membrane separation technology . In this study, the NH 2 -MIL-88B(Fe)/CDs@GO material with good photocatalytic properties was synthesized by hydrothermal method and mechanical stirring, and the photocatalytic membrane was obtained by vacuum filtration. The results show that the NH 2 -MIL-88B(Fe)/CDs@GO membrane can effectively intercept and degrade methylene blue (MB). After 10 cycles, the rejection rate of MB can still reach 99.5%, which is about 2.5 times of pure GO membrane (40%). After 15 min of visible light irradiation, the Flux recovery rate (FRR) of NH 2 -MIL-88B(Fe)/CDs@GO membrane can reach 95%, and the antifouling performance is excellent. In this study, the composite photocatalytic membrane shows excellent stability, photocatalytic performance and self-cleaning property, which is conducive to widening the application prospect of wastewater treatment .
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高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Zihan Yang,Jingkai Yang,Lixia Li,Wanning Cao,Jiao Zhang,Hongli Zhao,Liqin Wang
The challenge of creating effective S-scheme visible-light photocatalysts persists due to the inactive visible-light-driven component and the low band-gap characteristics of semiconductors. In this work, we developed a novel F-BiVO 4 /g-C 3 N 4 /CdS dual S-scheme photocatalyst using a sonochemical method. The removal efficiency of Cr(VI) and ciprofloxacin (CIP) can reach 98 % and 90 % in 5 min and 30 min, respectively, under simulated solar illumination. The excellent photocatalytic activity can be attributed to the efficient carrier separation and transport with the help of internal electric field at the interface. This work also reveals the reduction process of Cr(VI), as well as the intermediates and pathways involved in the CIP degradation, taking into account practical situations and expanding its potential applications. This research presents promising prospects for the design of bismuth-based dual S-scheme heterojunctions in the field of environmental remediation.
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高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2021
·
IF 6.064
Mengqi Wang,Kaiyue Zhang,Feixiang Ji,Yurong Guo,Chao Wang,Shiping Wang,Ya Chu,Guangjiu Zhao
A water-soluble probe composite material (CDs/ZnO) was synthesized by microwave pyrolysis methods of citric acid , urea and zinc oxide (ZnO) with aggregation-induced emission activity. We creatively realized the composite of CDs and nano-ZnO in the form of foam, then used as bactericide for the first time and showed excellent antibacterial properties. Also, the composite materials overcame the problem of aggregation-induced quenching (ACQ) and realized solid-state emission. The materials had two different emission centers, and the two emission peaks were varied with the change of excitation wavelength. Furthermore, Methyl red (MR) showed fluorescence quenching for CDs/ZnO with obvious linear correlation, which demonstrated potential in the measurement of MR in dyeing wastewater. The CDs/ZnO we obtained perfectly inherited the advantages of CDs and nano ZnO , it has not just no cytotoxicity to cells, but also has a good killing effect on bacteria. Hence, this work shows significant adaptable fluorescence-based protocol with enormous potential applications in biology.
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高影响因子
RSC Advances
·
2016
·Vol. 6
·期 78
·74394-74399
·
IF 3.289
Ping Du,Yuanzhi Zhu,Junyang Zhang,Danyun Xu,Wenchao Peng,Guoliang Zhang,Fengbao Zhang,Xiaobin Fan
Conversion of solar energy to hydrogen requires efficient, low-cost and earth-abundant H-producing photocatalysts. Herein, a novel noble metal-free photocatalyst 1T–MoS2/CdS NRs was prepared via a simple method. The 1T–MoS2/CdS NRs hybrid showed the highest photocatalytic activity when the optimized weight ratio of metallic 1T–MoS2 to CdS NRs is 10 wt% in a lactic acid solution under visible light. A 794.93 μmol h−1 H2 evolution rate of the 1T–MoS2/CdS NRs hybrid reached not only 35 times improvement than pure CdS NRs but also 4.5 times enhancement than the 2H–MoS2/CdS NRs hybrid. The relative mechanism has been investigated. 1T–MoS2/CdS NRs interfaces could form ohmic contact with very low contact resistances to promote photoexcited electron transfer, which was different from the p/n junction on the 2H–MoS2/CdS NRs hybrid.
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高影响因子
PHOTOCHEMISTRY AND PHOTOBIOLOGY
·
2016
·Vol. 92
·期 4
·515-522
·
IF 2.008
Yanmei Luo,Yiru Jia,Dexian Zhang,Xinjian Cheng
TiO 2 /PVA composite nanofiber mat was prepared via an electrospinning technology. SH-TiO 2 -SiO 2 hybrid particles and PVA solution were injected through a coaxial syringe, yielding a composite nanofiber mat. The as-prepared SH-TiO 2 -SiO 2 /PVA composite nanofiber mat was immersed in Cd 2+ cation solution and S 2− anion solution in turn. Thus, yellow TiO 2 @CdS/PVA composite nanofiber mats were prepared. By adjusting the number of times a mat was immersed in the Cd 2+ and S 2− solutions, different amounts of CdS particles attaching to the mats were obtained. Both SH-TiO 2 -SiO 2 /PVA and TiO 2 @CdS/PVA composite nanofiber mats were employed to catalyze the photodegradation of a model dye, methylene blue. The photodegradation performance could be greatly enhanced by the introduction of CdS particles anchoring onto TiO 2 particles. The photodegradation efficiency reached 99.2% within 180 min. Also, the nanofiber mat could be recycled and reused at least 10 times. The photodegradation efficiency of TiO 2 @CdS/PVA composite nanofiber mats remained 68.8% for 10 cycles.
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高影响因子
APPLIED CLAY SCIENCE
·
2025
·
IF 5.8
Yan Zhang,Xinhui Huang,Yaxue Zhang,Letian Lv,Chengyuan Su,Shu Gao,Zhi Huang,Menglin Chen,Xianfeng Lin
We prepare CdS-CeO 2 /sepiolite materials in a one-step process and characterize their structural, morphological, and optical properties. CdS-CeO 2 /sepiolite displays enhanced adsorption of the environmentally hazardous dye Rhodamine B (RhB), up to 34.92 mg/g. Harnessing synergy between adsorption and photocatalysis, CdS-CeO 2 /sepiolite removes 98.57 % of RhB from solution after 150 min of visible light illumination and is robust to a wide pH range. Quenching experiments and electron spin resonance (ESR) indicates that singlet oxygen and holes are the main reactive groups during photocatalytic degradation. CdS and CeO 2 hinder the recombination of photogenerated electron-hole pairs, accelerate charge transfer, and enhance visible light absorption. These CdS-CeO 2 /sepiolite materials have potential application in the efficient photodegradation of dye in a wide range of pH.
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产品关联
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高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Shu Wang,Xin Li,Yiwei Wang,Wenlong Yang,Shuang Han,Hui Zhang
The persulfate (PMS)-activated photo-Fenton system has emerged as a promising solution for addressing severe environmental contamination, owing to its efficient generation of strongly oxidizing free radicals. Herein, we present a magnetically recyclable CdS/CoFe 2 O 4 S-scheme heterostructure with broad-spectrum response, demonstrating exceptional performance in degrading ciprofloxacin (CIP) and high-concentration rhodamine B (RhB). A mild synthesized strategy was used to construct CdS/CoFe 2 O 4 composite, meanwhile, experimental characterizations and theoretical calculations were combined to exhibit the phase structure, interface heterojunction, surface chemical state, energy band structure, surface photovoltage, charge transfer mechanism, and magnetic property. In our work, the best degradation rates of CIP and RhB are 5.63 μmol·min −1 ·g -1 cat. and 13.91 μmol·min −1 ·g -1 cat. , respectively, with the contribution order of reactants to be h + >·SO 4 - >·O 2 – >·OH, which proves a synergy effect on the production of reactive oxygen free radicals and available photogenerated charge to boost the photo-Fenton applications. This work opens a new avenue for the construction of low-cost, high-efficiency, and magnetic recycling semiconductor heterojunction for enhanced photo-Fenton applications.
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2016
·
IF 8.328
Aiping Wu,Chungui Tian,Yanqing Jiao,Qing Yan,Guoyu Yang,Honggang Fu
The visible-light driven, Pt-free photocatalytic H 2 evolution (PHE) is promising for clean and sustainable H 2 production. The construction of the heterojunction structure with intimate contact and good light adsorption ability is important for realizing the high effective PHE. Here, the core-shell structured MoS 2 /CdS hybrids were constructed through “sequential two-step hydrothermal growth” route for Pt-free PHE. In the synthesis, the hierarchical flower-like MoS 2 was firstly obtained through the reaction of ammonium molybdate and excessive thiourea. Subsequently, without need of centrifugation, the cadmium acetate (Cd source) was added into the cooled MoS 2 solution directly followed by a secondary hydrothermal reaction. In the process, the Cd 2+ could react with partially S 2− in MoS 2 (substituted reaction) and with the excessive S 2− ions in solution to generate CdS, resulting in the formation of CdS shell contacted with MoS 2 core. The micro-structure of the composites (such as the thickness and morphology of CdS shell) could be tuned by changing the amount of Mo source and Cd source. In the composites, the CdS on the outside is convenient to absorb the solar light. The intimate contact of CdS and MoS 2 is beneficial to charge transfer. As a result, the MoS 2 /CdS catalyst showed high catalytic activity for PHE under visible light irradiation (λ > 420 nm). The H 2 evolution rate could reach to 775 μmol h −1 (20 mg catalyst), which is much higher than pure CdS (12 μmol h −1 ) and Pt-CdS (64 μmol h −1 ). The good activity should be related with CdS outside shell beneficial for light adsorption and intimate contact of CdS and MoS 2 for easy charge transfer. A series of experiments demonstrate that the formation of the heterojunction can effectively enhance the charge transfer ability and retard the recombination of electron-hole pairs, thus improving PHE activity and alleviating the photocorrosion of CdS component.
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高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.1
Xiaoying Liu,Yu Xie,Yuee Zhong,Jingshu Li,Meiling Liu,Youyu Zhang,Qiang Li
Alkaline phosphatase (ALP) is a critical biomarker for the diagnosis of various diseases. Consequently, the precise detection of ALP activity is indispensable for clinical diagnosis, biomedical research, and the screening of enzyme inhibitors. Meanwhile, organophosphorus pesticides (OPs), a class of highly toxic and persistent environmental contaminants, have raised significant concerns due to their extensive use in agriculture and their potential risks to both ecosystems and human health. Here, we developed a novel photoelectrochemical (PEC) biosensing platform based on an optimized CdS@In₂S₃ heterojunction for the detection of ALP activity and OPs compounds. Through systematic optimization of the In₂S₃ incorporation ratio, a significant enhancement in photoelectric conversion efficiency compared to pristine CdS was achieved. The sensing mechanism exploits the synergistic effects of the ALP mediated hydrolysis of L-ascorbyl-2-phosphate trisodium salt (AAP) to generate ascorbic acid (AA) and the AA-induced photocurrent amplification of the CdS@In₂S₃ heterojunction. This dual signal amplification strategy enabled ultrasensitive detection of ALP activity with a wide linear range of 0.17–17,000 U/L and an exceptionally low detection limit (LOD) of 0.0083 U/L. Chlorpyrifos (CPF) inhibits the activity of ALP, thereby reducing the amount of AA generated from AAP catalyzed by ALP. This results in attenuation of the AA-dependent photocurrent signal. By quantifying the degree of such photocurrent suppression, highly sensitive detection of CPF was achieved with a broad dynamic range of 0.1 ng/mL to 5 μg/mL and the LOD of 0.03 ng/mL. The sensor exhibited excellent operational stability (<5.5% RSD over 50 cycles), high selectivity against common interferents, and reliable performance in complex matrices (89–114% recovery in serum and agricultural samples). This work not only presents a robust analytical tool for food safety and biological monitoring but also provides new insights into the design of multifunctional heterojunction-based PEC sensors for dual-targets detection.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 12.5
Yu Liu,Changting Chen,Chengzuo Liu,Jianan Zeng,Jianqiang Luo,Xiaolan Tong,Xuejiao Peng,Shujuan Liu,Jianguo Ma
Constructed a type-II CoNC@CdS heterojunction for PEC reduction of U(VI). • PEC reaction rate was 12.8 times that of photocatalysis alone. • Built-in electric field and bias synergistically promoted charge separation. • Soluble U(VI) was efficiently converted to insoluble UO 2 precipitate. Photoelectrocatalytic (PEC) reduction of U(VI) is an effective strategy for treating uranium contamination in water. Herein, a CoNC@CdS type-II heterojunction electrode was designed for the efficient reduction of U(VI) via a PEC process. Under optimized conditions, the fabricated electrode delivers an outstanding U(VI) removal efficiency of 97.8%, accompanied by a pseudo-first-order kinetic rate constant of 0.0349 min −1 . The PEC reaction rate of CoNC@CdS is 20.1 and 12.8 times higher than that of single electrocatalysis and photocatalysis systems, respectively. Stability evaluation reveals that even after six successive cyclic tests, the U(VI) removal efficiency remains above 80%, demonstrating robust cycling durability. Mechanism characterizations elucidate that CoNC improves electrode conductivity and light absorption capability, while layered CdS shortens charge migration distance and restrains carrier recombination. The built-in electric field of type-II heterojunction combined with external bias drives spatial separation and directional transport of photogenerated charge carriers, thereby efficiently converting soluble U(VI) into insoluble UO 2 precipitates. This work provides a promising strategy for uranium recovery and remediation in complex aqueous matrices.
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高影响因子
Science China-Materials
·
2025
·Vol. 69
·期 1
·215-227
·
IF 7.4
Chen Guangyuan,Tang Tingting,Li Yubao,Lin Chenyang,Zhou Shijian,Kong Yan
Metal sulfides like CdS hold promise for solar-driven H 2 O 2 productions but suffer from rapid charge recombination and severe photocorrosion. This study introduces a dual-functional strategy synergizing sulfur vacancy (S v ) engineering and polydopamine (PDA) coating to overcome these limitations. S v -CdS nanorods were hydrothermally synthesized with tunable vacancy concentrations, followed by in-situ PDA deposition to construct a direct Z-scheme heterojunction. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations reveal that the introduction of S vacancies reduces the work function of CdS, facilitating energy level alignment with PDA and enabling efficient electron transfer from CdS to PDA. By tuning the concentration of S vacancies, the charge transfer efficiency can be maximized. As a result, the photocatalytic H 2 O 2 production rate reaches 2539.5 µmol g −1 h −1 under visible light, and further increases to 4395.5 µmol g −1 h −1 after PDA encapsulation —15.6 times higher than that of pristine CdS. Concurrently, PDA enhances O 2 adsorption and protects S v -CdS from photocorrosion. S v -CdS@PDA exhibited superior photostability compared to S v -CdS after three consecutive photocatalytic cycles. Mechanistic studies suggest that the Z-scheme heterojunction effectively separates electron-hole pairs: electrons in the conduction band of CdS reduce O 2 to ·O 2 − , which is subsequently converted to H 2 O 2 , while holes in the valence band of S v -CdS oxidize water to replenish O 2 . This work provides fundamental insights into engineering charge transfer and stability in sulfide-based photocatalysts.
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高影响因子
INORGANIC CHEMISTRY
·
2026
·
IF 4.6
Siqi Wang,Jiawang Liu,Meiting Chen,Xueqi An,Shuang Guo,Zihui Liang,Ping Wang,Yinghui Wang,Xiaotian Yang
Semiconductor quantum dots (QDs) are attractive building blocks for photocatalytic hydrogen evolution because their optical and electronic properties can be tailored through nanoscale structural design. However, in many QD-based hybrid systems, limited interfacial coupling between the QDs and cocatalyst hinders charge transfer and obscures the relationship between the interfacial structure and function. Herein, we report a Ni-modified giant reverse type-I CdS/CdSe core/shell QD system prepared by photodeposition, in which the Ni loading can be quantitatively tuned from 1 to 7 atoms per QD. Structural and spectroscopic characterizations indicate that the deposited Ni species are intimately associated with the CdS/CdSe QDs, while the giant core/shell architecture is retained. This interfacial modification leads to systematic changes in charge-carrier behavior, as evidenced by photoluminescence, photocurrent, electrochemical impedance, transient photovoltage, and transient absorption measurements. Among the series, CdS/CdSe-Ni4 exhibits the most efficient visible-light-driven hydrogen evolution, with a rate of 4492 μmol g–1 h–1 and a turnover frequency of 2.6 s–1 per Ni site. The results show that the regulation of the QD/Ni interface plays an important role in promoting electron extraction and interfacial charge transfer. This study provides a useful model for understanding how surface metal-site modification influences the photophysical and photocatalytic properties of colloidal semiconductor core/shell nanostructures.
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PubMed
高影响因子
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