JOURNAL OF MOLECULAR STRUCTURE
·
2025
·
IF 4.7
Zengchen Liu,Zimin Wang,Wenbo Zhang,Kaibo Xu,Wenping Zhu,Hongyu Chen,Yahong Chen,Yanxia Li,Baodui Wang
Iron is one very important element, which plays key roles in living organisms. Especially, ferric iron ions participate in various biochemical processes of the body through functions such as heme synthesis, immune regulation, iron utilization and transport, redox reactions, and gene expression regulation. Herein, a highly selective fluorescence sensor for ferric ion based on boric acid assisted N-doped CDs was prepared. In the sensing process of Fe 3+ , the fluorescence of BA-N-CDs water solution changes from yellow to red obviously in acidic condition, accompanied by the change in color of the solution from pale yellow to dark red. In addition, the fluorescence sensor shows low detecting limit (nanomolar level) by fluorescence titration spectrum. Moreover, according to evaluate excellent fluorescence imaging of sensor toward Fe 3+ in M109 cell and tomato leaf, the study provided an important idea for constructing water-soluble fluorescence sensor for Fe 3+ in organism and plant system.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2019
·
IF 6.361
Dandan Ma,Diankun Sun,Yajun Zou,Siman Mao,Yixuan Lv,Yao Wang,Jun Li,Jian-Wen Shi
A series of dandelion-like Fe-CeO 2 /CdS (FeCe x /Cd y ) nanoflowers with different molar ratios of Fe-CeO 2 to CdS are synthesized by solvothermal method for the first time. The FeCe x /Cd y nanoflowers are assembled by a large number of nanoparticles with the diameter of about 3 nm, and the introduction of Fe ions and the couple of CdS quantum dots (QDs) efficiently enhanced the relative percentage of Ce 3+ in CeO 2 . The as-obtained FeCe 1 /Cd 1 heterostructure exhibits the highest photocatalytic H 2 evolution ability of 108.9 μmol/h, which is 20.5, 6.1 and 7.1 times higher than CeO 2 , Fe-CeO 2 and CdS, respectively. This significantly enhanced photocatalytic performance can be mainly attributed to the synergy between the electronic anchoring effect of Fe 3+ /Fe 2+ and Ce 4+ /Ce 3+ redox couples and the internal electric field constructed by the II-type heterojunction between Fe-CeO 2 and CdS. This work provides a new idea for the design of efficient photocatalysts by combining the advantages of heterostructure and ion anchoring effect.
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ACTA PHYSICO-CHIMICA SINICA
·
2025
·
IF 13.5
Yuge Fan,Xianliang Fu,Li Zhu,Man Xu
Low-temperature KSCN flux has been used for one-pot fabrication of decorated sulfide-based photocatalysts. However, the reaction system is actually short of S precursor, as it is determined by the decomposition of relatively stable KSCN, which may not be conducive to the production of high-performance catalysts. To this end, a modified KSCN flux route with a dosage of external S source was developed and used for the one-pot preparation of sulfide photocatalyst with 1% MoS 2 /CdS as the prototype. The results indicated that, compared with the sample (MC) prepared in conventional KSCN flux, a highly efficient sample enriched with seldom reported Cd vacancy (V Cd , MC-S) could be readily fabricated under the S 2− -rich environment. Furthermore, both the size of CdS and MoS 2 could be substantially reduced from μm to nm scale as more nuclei could be introduced in the flux, which leads to a few-layer MoS 2 that can be uniformly and tightly anchored on CdS with the average size of only ∼33 nm. Consequently, the resulting MC-S demonstrated an exceptional H 2 evolution activity of 15.01 mmol h −1 g −1 — a significant 6.5-fold improvement over its counterpart (MC) prepared through traditional KSCN flux. The high activity can be mainly ascribed to the introduction of V Cd and the close interface between small CdS and few-layer MoS 2 , which both benefit electron-hole separation. The preparation mechanism of the samples was tentatively compared and discussed from the difference in the nucleation and the development of crystals. We believe that this improved preparation method will also benefit the synthesis of other high-performance sulfide-based photocatalysts.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yanling Liu,Xiao Wei,Yurou Ye,Xiaping Zhu,Ping Zhao,Wei Ren
The key to building an efficient photo-Fenton system lies in designing and preparing materials with dual photocatalytic and Fenton reaction activities to achieve effective synergy between the two processes, thereby significantly improving the degradation efficiency of organic pollutants. In this work, the CdS-loaded Fe-doped graphitic carbon nitride (CdS/Fe-g-C 3 N 4 ) with a type-II heterojunction was prepared in situ using a hydrothermal approach and employed as an efficient photo-Fenton catalyst for degrading antibiotics. Under optimized conditions (pH 2.0, catalyst concentration of 1.0 g/L and 800 μL of 0.1 mol/L H 2 O 2 ), the system achieves a degradation rate of 95.49% for 100 mg/L OFL within 80 min, with a rate constant (k) of 0.0447 min -1 . This is 22.35 times and 3.49 times higher than those of the CdS/Fe-g-C 3 N 4 +H 2 O 2 system and the light+CdS/Fe-g-C 3 N 4 system, respectively. The photocatalyst retained relatively high photocatalytic activity after 7 cycles, and it is appropriate for degrading many kinds of quinolone antibiotics. Mechanistic studies indicate that the type-II heterojunction formed between CdS and Fe-g-C 3 N 4 drives the directional migration of photogenerated electrons from the conduction band of CdS to that of Fe-g-C 3 N 4 , facilitating the reduction of Fe 3+ to Fe 2+ and significantly accelerating the generation of active radicals (∙OH). Analysis via mass spectrometry (MS) and the T.E.S.T. toxicity assessment software indicates that OFL undergoes stepwise transformation into a series of low-toxicity or non-toxic intermediates during degradation. This research provides a feasible and effective way to treat wastewater with high-concentrations of antibiotics in the industrial field.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Linzi Huang,Chenxi Wang,Yaqi Yang,Yilin Wang,Chunyan Li,Yixi Xie,Pengcheng Zhao,Junjie Fei
The ecological environment and public safety are seriously threatened by the typical phenolic contaminant hydroquinone (HQ). Here, using a straightforward physical mixing technique, we created an n - n heterojunction by uniformly immobilizing cadmium sulfide (CdS) nanoparticles on the surface of a three-dimensionally layered, flower-like structure made of tin sulfide (SnS 2 ). Then, as photosensitizers , carbon nanotubes (CNTs) were added to the CdS/SnS 2 complex to create a type-II heterostructure of CdS/SnS 2 /CNTs with synergistic effects. Subsequently, the detector HQ was bound to the modified photoelectrodes , which was accompanied by the hole oxidation of the bound HQ, leading to a significant increase in the photocurrent signal, thus allowing specific and sensitive detection of HQ. Under optimized detection conditions, the proposed photoelectrochemical sensor shows a wide detection range of 0.2 to 100 μM for HQ with a detection limit as low as 0.1 μM. The high accuracy of the sensor was demonstrated by comparison with the detection results of UV–vis spectrophotometry . In addition, the photoelectrochemical sensor exhibits good reproducibility, stability, selectivity , and specificity, providing a light-driven method to detect HQ.
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FUEL
·
2023
·
IF 7.4
Junnan Tao,Mingyuan Wang,Xiangzhao Zhang,Lei Lu,Hua Tang,Qinqin Liu,Shuangying Lei,Guanjun Qiao,Guiwu Liu
Energy band matching coupled with intimate interface in a heterojunction is the prerequisite for achieving the separation of photogenerated carriers. Herein, 0D CdS nanospheres were uniformly anchored in 3D flower-like CoAl layered double hydroxide (CoAl-LDH) spheres via a hydrothermal process. The unique porous structure and abundant hydrophilic groups can significantly promote the interactions between catalyst and solutions and thus facilitate the photocatalytic reaction. The appropriately staggered band structures can trigger the formation of S-scheme heterojunction, and the tight connection between the CdS and CoAl-LDH offers more charge transport channels, thereby accelerating the charge transfer. The optimized CdS/CoAl-LDH nanohybrid presents a photocatalytic hydrogen evolution of 6.19 mmol/g/h and tetracycline hydrochloride (TC) degradation efficiency of 92.2 % in 50 min. Moreover, the Cd 2+ ion concentration measured by ICP-OES verifies the alleviation of photocorrosion, and the DFT calculations further demonstrate the higher hydrophilia, lower H 2 absorption energy and stronger charge interactions of CdS/LDH hybrid. This work provides a feasible strategy to efficiently utilize the photoinduced carries by constructing a highly hydrophilic S-scheme heterojunction.
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MICROCHEMICAL JOURNAL
·
2023
·
IF 4.8
Hui Cao,Xiner Ding,Zixin Chen,Jialuo Mao,Xiuna Ma,Ziqi Wei,Tai Ye,Min Yuan,Jinsong Yu,Xiuxiu Wu,Fengqin Yin,Fei Xu
EDTA-etched CdTe@CdS QDs were used as the specific recognition element and signal probe of a fluorescence sensor or paper chip for the highly sensitive detection of Cd(II) with an electronic eye device as readout. The results showed that the CdTe@CdS QDs were successfully synthesized with a typical core–shell structure. Under the optimum conditions, the EDTA-etched CdTe@CdS QDs sensor achieved the sensitive detection of Cd(II) with a detection limit of 0.092 μM and a concentration range of 0.44–6.67 μM. The paper chips based on the EDTA-etched CdTe@CdS QDs sensor had a visual cut-off value of 0.44 μM with a short detection time (<15 min). The proposed method also exhibited excellent stability, high specificity, and good recovery for Cd(II) in real rice samples. These results suggested that the EDTA-etched CdTe@CdS QDs provide a promising platform for on-site and visual detection of Cd(II) in rice samples.
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MATERIALS RESEARCH BULLETIN
·
2023
·
IF 5.4
Junge Zhang,Yuan Ding,Xianggang Ma,Yingliang Liu,Li Zhang,Kunlun Wang,Shaokui Cao,Shengang Xu
The rapid recombination of photogenerated carriers and the narrow absorption range of visible light greatly limit the photocatalytic activity of graphite carbon nitride (g-C 3 N 4 ). Herein, g-C 3 N 4 was jointly modified by carbon dots (CDs) and copolymerization via in situ co-calcining of three precursors (urea, glucose and 2-amino-5-iodo-benzonitrile (I-ABN)), and named as I-ABN x -C 3 N 4 @CDs y . Then, solid-state Z-scheme photocatalysts PC1–PC9 with CDs as the electron mediators were prepared via in situ growth of BiOI on the surface of I-ABN x -C 3 N 4 @CDs y through solvothermal method. The optimal proportion of each component was explored through orthogonal experiments. The existence of CDs act as an electron transport medium to accelerate the transportation rate of photogenerated carriers, improve the light absorption capacity. The copolymerization with I-ABN introduce benzene rings and I − to g-C 3 N 4 , which enhance the light absorption capacity and photoelectric efficiency. The Z-scheme heterojunction effectively suppresses the recombination of photogenerated electron–hole pairs. Therefore, PC1–PC9 presented excellent performance for the degradation of BPA due to the synergistic effects of the above three points. Among them, PC6 showed the best photocatalytic activity, which completely degraded BPA (15 mg/L) within 40 min, and whose rate constant (0.091 min −1 ) was 22.8 times that of bulk g-C 3 N 4 . The active radical trapping experiment determined •O 2 − and h + were the main active radicals. Finally, the BPA degradation mechanism by PC6 was proposed. This study provides new insights for the combination of heterojunction, carbon dots, and copolymerization to rationally design efficient photocatalysts to restore the environment.
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RENEWABLE ENERGY
·
2020
·
IF 6.274
Heqing Zhang,Zebin Yu,Ronghua Jiang,Yanping Hou,Jun Huang,Hongxiang Zhu,Fei Yang,Mingjie Li,Fengyuan Li,Qi Ran
Developing favorable charge transfer mode for photocatalytic hydrogen evolution in a photocatalyst is a promising way to enhance photocatalytic activity . In this study, MOF, decorated with different functional groups, was initially used as charge transfer mode convertor coupled with CdS/α-NiS-β-NiS. The NH 2 -UiO-66/CdS/α-NiS-β-NiS lead to twice and triple higher H 2 evolution compared to (OH) 2 -UiO-66/CdS/α-NiS-β-NiS and UiO-66/CdS/α-NiS-β-NiS respectively under simulated sunlight. The NH 2 -UiO-66 provides suitable energy band structure to formed Z-scheme with CdS/α-NiS-β-NiS, which plays a synergistic role in the photocatalytic process. The loading of α-NiS-β-NiS significantly improves the visible light absorption ability and provides abundant active sites. As a result, the α-NiS-β-NiS/CdS/NH 2 -UiO-66 show considerable photocatalytic hydrogen production rate of 17.88 mmol h −1 g −1 , which is 7.9 times and 2.5 times as high as-those of pure CdS and 7-α-NiS-β-NiS/CdS, and it also shows a prominent apparent quantum efficiency (AQE) of 14.7% at 420 nm. This work provides a new insight design a metal organic frameworks based heterojunction with highly-efficient photo-induced charge separation and excellent visible-light absorption ability.
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CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Lixiang Zhang,Luping Feng,Pan Li,Xi Chen,Jiatian Jiang,Sheng Zhang,Chunxian Zhang,Anchao Zhang,Guofu Chen,Hua Wang
A visible-light-driven photoelectrochemical (PEC) sensor has been developed for probing Hg 2+ with “turn-on” signal output using hollow CoS x @CdS polyhedron as direct Z-scheme photocatalyst and Hg 2+ -recognition probe. The CoS x @CdS heterojunction photocatalysts were fabricated by growing CdS nanoparticles on the surface of cobalt sulfide (CoS x ) via one-pot solvothermal route using metal-organic frameworks (MOFs) of ZIF-67 polyhedrons as the sacrificial templates and cobalt precursors. It was discovered that the photocurrent responses of the CoS x @CdS-modified ITO electrodes could be specifically turned on by Hg 2+ , in contrast to these of the CoS x or CdS-modified ones showing no significant Hg 2+ -induced photocurrent. Under visible light irradiation, herein, the synergetic combination of CoS x and CdS components could improve the carriers transferring of PEC system. More importantly, the photocurrents of the PEC sensor could be greatly enhanced in the presence of Hg 2+ through the selective ion-exchange reaction to trigger the in-situ formation of a new Z-scheme heterojunction of CoS x @CdS/HgS photocatalysts, achieving the further promoted charge transferring and suppressed recombination of photogenerated electron-hole pairs. The developed double heterojunctions-based PEC sensors can detect Hg 2+ with the concentrations ranging from 0.010 to 1000 nM, which performances are much better than those of the current PEC analysis methods. Besides, such a MOF-templated one-pot construction route may pave the way toward the design of various direct Z-scheme heterojunction photocatalysts of PEC probes of great interest.
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ACS Sustainable Chemistry & Engineering
·
2020
·
IF 7.632
Yuan Lin,Qiao Zhang,Yuhang Li,Yunpeng Liu,Kejia Xu,Jiangnan Huang,Xiaosong Zhou,Feng Peng
An incompletely covered CdS/ZnS core/shell is synthesized via a simple hydrothermal method. Due to the defect energy levels introduced by zinc vacancies, the typical type-I heterojunction of CdS/ZnS evolves to a type-II heterojunction and Z-scheme hybrid structure so that the ZnS shell can timely transfer and capture the photogenerated holes from the CdS core. The surface photovoltage (SPV) distribution caused by photogenerated charges on the surface of catalyst is visually presented by Kelvin probe force microscopy with synchronous illumination (microscope SPV). It intuitively proves the effective spatial separation of photogenerated holes from the CdS core to the ZnS shell, for the first time. Under optimal conditions, the highest hydrogen production rate of CdS/ZnS reached 24.1 mmol g–1 h–1 under visible light illumination. The average apparent quantum yield of 9.3% can be achieved for 9 h of illumination (λ = 420 ± 5 nm). It exhibits highly efficient photocatalytic H2 evolution with well stability.
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DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 30
·10501-10514
·
IF 4.39
Xuqiang Hao,Dingzhou Xiang,Zhiliang Jin
Herein, a novel amorphous monodisperse Co3O4 quantum dots/3D hexagonal CdS single crystals (0D/3D Co3O4 QDs/CdS) p–n heterojunction was constructed by a simple hydrothermal and electrostatic self-assembly method. The amorphous monodispersed Co3O4 QDs (≈4.5 nm) are uniformly and tightly attached to the surface of the hexagonal CdS single crystals. The sample, 0.5% CQDs/CdS exhibits outstanding hydrogen evolution activity of 17.5 mmol h−1 g−1 with a turnover number (TON) of 4214, up to 10.3 times higher than that of pure CdS. The enhanced photocatalytic activity can be attributed to the synergistic effect of the p–n heterostructure and the quantum confinement effect of Co3O4 QDs, which significantly promoted the separation efficiency of photo-generated electrons and holes. Additionally, the sulfur vacancy also can act as electron trappers to improve carrier separation and electron transfer. The photoelectrochemical and time-resolved fluorescence (TRPL) results further certify the effective spatial charge separation. This work gives an insight into the design of the 0D/3D Co3O4 QDs/CdS p–n heterostructure for a highly efficient photocatalysis.
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