CHINESE JOURNAL OF CATALYSIS
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2024
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IF 15.7
Mengzhen Ren,Tianfu Liu,Yuanyuan Dong,Zheng Li,Jiaxin Yang,Zhenheng Diao,Hongjin Lv,Guo-Yu Yang
ABSTRACT Simultaneously harnessing the photogenerated electrons and holes to convert thiols into the value-added disulfides with the concomitant formation of H 2 represents a highly promising strategy for maximizing the conversion of solar energy into chemical energy. Herein, we report an effective catalytic system comprising CdS nanorods (NRs) and Ni-containing polyoxometalate (Na 6 K 4 [Ni 4 (H 2 O) 2 (PW 9 O 34 ) 2 ] (Ni 4 P 2 )) (Ni 4 P 2 /CdS), which exhibited efficient photocatalytic activities towards the near-unity dehydrocoupling of 4-methoxythiophenol (4-MTP) into disulfide and H 2 evolution. The photooxidative dehydrocoupling of 4-MTP can be finished after 4 h photocatalysis , leading to 98.39% conversion of 4-MTP with the yield of disulfide and H 2 reaching 24.45 and 25.96 μmol, respectively. The Ni 4 P 2 /CdS catalytic system also showed good photocatalytic recycling stability. Comprehensive experimental and characterization results indicated that the synergistic cooperation between CdS NRs and Ni 4 P 2 facilitated the separation and migration of the photogenerated electron-hole pairs, thereby improving the photocatalytic dehydrocoupling of 4-MTP to disulfide coupling with hydrogen production .
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Molecular Catalysis
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2024
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IF 3.9
Xin-Ni Shao,Yin-Feng Wang,Ming-Yu Qi,Zi-Rong Tang
Simultaneous utilization of photogenerated electrons and holes within a photoredox system enables effective hydrogen (H 2 ) production and organic synthesis, aligning with eco-friendly chemistry principles and current energy challenges. Here, we report the preparation and application of cocatalyst MoS 2 decorated CdS (MoS 2 CdS) composites for the photoredox-mediated C–N coupling of amines to imines and H 2 generation under visible light illumination. The H 2 and N-benzylidenebenzylamine yields for the optimal MoS 2 CdS are 28.9 and 15.0 times higher than those of bare CdS, respectively. Mechanism studies reveal that the enhanced photocatalytic activity results from the MoS 2 acting as an electron sink, which accelerates the separation and migration of photogenerated charge carriers. Additionally, the pH(•CH)NH 2 intermediates are found to play a pivotal role in the dehydrogenative coupling of benzylamine. Furthermore, the MoS 2 CdS composites exhibit universal applicability in the conversion of various aromatic amines into corresponding imines integrated with H 2 evolution.
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SENSORS AND ACTUATORS B-CHEMICAL
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2018
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IF 5.667
Zhiqing Yang,Yi Wang,Dun Zhang
New approach for fabrication of photoelectrochemical sensing platform has been demonstrated for sulfate-reducing bacteria (SRB) detection based on biosynthesis of CdS quantum dots (QDs) sensitizing ZnO nanorod arrays. ZnO nanorod arrays were synthesized on the FTO substrate via galvanic-cell-based approach and then silanized by (3-Aminopropyl)triethoxysilane (APTES) with amino groups to introduce Cd 2+ . By taking advantage of the characteristic bacterial metabolite (H 2 S) reaction with Cd 2+ , CdS QDs can be biosynthesized on the surface of ZnO nanorod and significant enhancement of photocurrent due to the formation of CdS/ZnO heterostructures. The fabricated PEC sensing platform showed detection sensitivity of 32 cfu/mL for SRB. The current work can provide new strategies to construct advanced PEC sensing platforms for detections of physiologic messenger molecules (H 2 S).
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ACS Omega
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2018
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IF 0
Yong Xu,Yong Chen,Wen-Fu Fu
CoP was synthesized in situ on the surface of CdS nanowires using a cobalt–ammine complex as a precursor. The generated CoP@CdS photocatalyst was well characterized by X-ray diffraction, transmission electron microscopy, selected-area electron diffraction, and diffuse reflectance spectra. A more efficient charge transfer was successfully achieved owing to the close contact between CoP and CdS. The hybrid photocatalyst showed excellent activity for the reduction of nitroarenes to the corresponding anilines or azobenzene compounds in water. In present work, hydrogen evolution and nitro reduction were concurrent and with the consumption of substrate, the rate of hydrogen evolution increased. The driving force for the reduction originated from the activated hydrogen species in the photocatalytic reaction rather than from dihydrogen. The photocatalytic activity of as-prepared CoP@CdS in situ is comparable to that of the catalysts formed using a noble metal loaded onto CdS. Mechanistic investigation showed that the condensation route is the major pathway for nitro reduction in the present system, and azo compounds could be obtained with less irradiation time, while aniline will be obtained via long-time irradiation.
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ACS Sustainable Chemistry & Engineering
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2018
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IF 6.14
Yongjin Ma,Yuan Bian,Yi Liu,Anquan Zhu,Hong Wu,Hao Cui,Dewei Chu,Jun Pan
Photocatalytic hydrogen evolution from water splitting is a promising approach in energy conversion and storage. Here, the 0D/1D CdS quantum dots (QDs)/CeO2 nanorods heterojunction was designed and fabricated by a facile two-step method. The optimum photocatalytic H2 evolution activity for CeO2-based composites with 3 at. % CdS QDs (101.12 μ mol h–1 g–1) was 45 times as high as that of pure CeO2 nanorods (2.25 μ mol h–1 g–1) under light irradiation. Meanwhile, the photocurrent response intensity increased 17.75 times higher than pure CeO2 nanorods. Furthermore, the 0D/1D CdS QDs/CeO2 heterojunctions exhibited enhanced photocatalytic stability for long lifetime (60 h). The reasons that dramatically enhanced photocatalytic performance could be the improved light harvesting, enhanced photoresponse and stronger electronic conductivity while the CdS QDs was loaded in CeO2 nanorods to form the 0D/1D heterojunctions CdS QDs/CeO2 nanocomposites. What’s more, the remarkably increased photocatalytic performance of CdS QDs/CeO2 composites was mainly attributed to the Z-scheme between CdS QDs and CeO2 nanorods, which was confirmed by the PL (photoluminescence) method. Therefore, the proposed system is highly promising for large scale photocatalytic hydrogen evolution.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2024
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IF 9.4
Yiyang Bi,Kun Xu,Ying Wang,Xin Li,Xupeng Zhang,Jiabo Wang,Yu Zhang,Qun Liu,Qianrong Fang
Metal-organic framework materials (MOFs) and their derivatives have been widely used in the field of photocatalytic water decomposition for hydrogen production . In this study, NiS/CdS was initially acquired and subsequently combined with DUT-67 via ultrasound to create a unique ternary photocatalyst NiS/CdS@DUT-67. The rate of hydrogen production for NiS/CdS@DUT-67 is 9618 μmol·g NiS/CdS −1 ·h −1 for NiS/CdS@DUT-67, which is 32 times and 2.5 times higher than that for CdS and NiS/CdS, respectively. Of particular interest is the fact that even after 50 h of photocatalysis, the hydrogen production rate did not show a significant decrease, demonstrating its excellent stability compared to CdS and NiS/CdS. In this ternary system, NiS and DUT-67 function as dual co-catalysts for CdS, collaborating to enhance charge separation during the photocatalysis. This study presents a clear demonstration of the advantages of utilizing metal–organic framework derivatives (MOF-derivatives) cophotocatalysts and their synergistic effect, resulting in improved photocatalytic activity and stability of semiconductors. This innovative approach provides a new perspective on constructing photocatalytic materials with exceptional performance.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
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IF 6.3
Changyan Guo,Cheng Guo,Shuai Yang,Naeem Akram,Yonghong Zhang,Jide Wang
Controlling the excessive oxidation of 1,4-Benzenedimethanol (1,4-BDM) to selectively produce high-value-added 4-hydroxybenzaldehyde (4-HB) under mild conditions while simultaneously generating H 2 is a challenging problem. In this study, it was found that incorporating Ni into cadmium sulfide (CdS) significantly reduces the bandgap of CdS and adjusts its conduction band position, yet still leads to over-oxidation of 1,4-BDM. To enhance selectivity, we designed and synthesized a bifunctional photocatalyst, CdS-Ti/Ni, with a petal-like structure by integrating both Ni and Ti with CdS. This composite exhibits a bandgap of 2.3 eV, and the synergistic effects of Ti and Ni result in more favorable valence and conduction band positions, thereby demonstrating superior photocatalytic efficiency and selectivity. Within the first 30 minutes, the bifunctional CdS-Ti/Ni achieved a 73 % selectivity for 4-HB. The H 2 evolution rate reached 20.2 mmol·g −1 ·h −1 , which is 13 times higher than that of pure CdS. This study demonstrates that bimetal doping can adjust the energy band structure, photocatalytic H 2 production efficiency and oxidation selectivity of semiconductor materials, offering valuable insights for the design of efficient bifunctional photocatalysts.
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BIOSENSORS & BIOELECTRONICS
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2024
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IF 10.7
Chuanyu Yang,Caiyi Du,Feiyu Yuan,Peitong Yu,Boxu Wang,Changshun Su,Ruiqi Zou,Junyang Wang,Xu Yan,Chunyan Sun,Hongxia Li
Benefiting from specific target recognition and trans-cleavage capabilities, the CRISPR/Cas12a system has great application prospects in the design of highly sensitive and rapid fluorescence biosensors. The CRISPR/Cas12a-based fluorophore-quencher molecular beacons exhibit single-color emission and are easily exposed to interference from environmental factors. Herein, we design a CRISPR/Cas12a-derived ratiometric fluorescence sensor for Pb 2+ detection based on embedded carbon dots@zeolitic imidazolate framework-8 (CDs@ZIF-8) composites and DNAzyme. The functions of ZIF-8 about encapsulating red emissive CDs in the inner cavity and adsorbing DNA on the outer surface are integrated to establish dual fluorescence signals, thereby reducing the possibility of interference and improving sensing accuracy. The presence of Pb 2+ is converted into the change of activator by the GR5 DNAzyme to activate the CRISPR/Cas12a system, which provides signal amplification through multiple turnovers of side branch cutting, achieving highly sensitive detection of Pb 2+ with a low detection limit of 18 pM. This method has the advantages of simplicity, universality, and excellent quantitative ability, and has broad prospects in sensing applications.
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MOLECULES
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2024
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IF 4.2
Yuqing Yan,Yonghui Wu,Chenggen Lu,Yu Wei,Jun Wang,Bo Weng,Wei-Ya Huang,Jia-Lin Zhang,Kai Yang,Kangqiang Lu
CdS quantum dots (CdS QDs) are regarded as a promising photocatalyst due to their remarkable response to visible light and suitable placement of conduction bands and valence bands. However, the problem of photocorrosion severely restricts their application. Herein, the CdS QDs-Co 9 S 8 hollow nanotube composite photocatalyst has been successfully prepared by loading Co 9 S 8 nanotubes onto CdS QDs through an electrostatic self-assembly method. The experimental results show that the introduction of Co 9 S 8 cocatalyst can form a stable structure with CdS QDs, and can effectively avoid the photocorrosion of CdS QDs. Compared with blank CdS QDs, the CdS QDs-Co 9 S 8 composite exhibits obviously better photocatalytic hydrogen evolution performance. In particular, CdS QDs loaded with 30% Co 9 S 8 (CdS QDs-30%Co 9 S 8 ) demonstrate the best photocatalytic performance, and the H 2 production rate reaches 9642.7 μmol·g −1 ·h −1 , which is 60.3 times that of the blank CdS QDs. A series of characterizations confirm that the growth of CdS QDs on Co 9 S 8 nanotubes effectively facilitates the separation and migration of photogenerated carriers, thereby improving the photocatalytic hydrogen production properties of the composite. We expect that this work will facilitate the rational design of CdS-based photocatalysts, thereby enabling the development of more low-cost, high-efficiency and high-stability composites for photocatalysis.
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Journal of Environmental Chemical Engineering
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2025
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IF 7.2
Nuo Zhang,Bingzhu Wang,Pengcheng Hu,Zhenxing Gao,Haiwang Wang
MCNTs-CdS has been identified as a promising material for photocatalytic hydrogen production due to its strong visible-light responsiveness and suitable energy band structure. However, the rapid complexation of its photogenerated electrons and holes makes its photocatalytic hydrogen production unsatisfactory. To address the above problem, MCNTs-CdS/Pt/ZnFe 2 O 4 composites were designed in this paper, and Pt was used as an electronic bridge to realize the fast transfer of electrons between the two semiconductors. The results show that the carrier transport resistance of MCNTs-CdS/Pt/ZnFe 2 O 4 system is greatly reduced, and the electron-hole separation rate is significantly better than that of MCNTs-CdS. In addition, the results of the photolysis of water hydrogen production demonstrated that when the deposition amount of Pt was 8 % and the mass ratio of MCNTs-CdS to ZnFe 2 O 4 was 1:0.1, the hydrogen production rate reached its maximum (1100.82 μmol/g/h), which was 35.51 times higher than that of MCNTs-CdS. The metal Pt functions as an electronic bridge to realize rapid electron transfer and MCNTs-CdS/Pt/ZnFe 2 O 4 form a Z-scheme carrier transport mechanism.
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FOOD CHEMISTRY
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2025
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IF 9.8
Luping Feng,Jianghong Wang,Xiao Zhuang,Yujie Fan,Leyao Jin,Enjun Chen,Xinfeng Li,Peisong Tang,Lixiang Zhang
A bifunctional tubular step-scheme Co 3 S 4 /CdS heterostructure was successfully synthesized for efficient photoelectrochemical (PEC) detection coupled with the degradation of tetracycline (TC). It was found that so-obtained heterostructure could effectively suppress the recombination of photo-generated carriers and display larger PEC responses owing to the internal electrostatic field. Upon adding TC, the photocurrent signal of Co 3 S 4 /CdS heterostructure was specifically activated due to the direct consumption of holes in CdS component by TC, resulting in significantly enhanced charge separation. Crucially, the photo-induced holes in CdS and produced • OH radicals can realize catalytic degradation of TC during its detection and the possible intermediates and degradation pathways were speculated. A dual-functional PEC sensing platform has thereby been developed for detection and degradation of TC with ultra-low detection limit and high degradation efficiency. Additionally, the developed sensor displayed excellent selectivity and high stability, demonstrating its potential for TC detection and degradation in tap-water and milk samples.
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Analytical Methods
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2024
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IF 2.7
Lu Zhang,Kun Wang,Feng Zhou,Yuwei Bu,Xiaoyan Yang,Guangming Nie
A sensitive photoelectrochemical (PEC) biosensor for silver ions (Ag+) was developed based on Zn-Co doped C and CdS quantum dots (CdS QDs) nanomaterials. Hydrophobic modified sodium alginate (HMA), which could stabilize and improve the PEC performance of CdS QDs, was also used for the construction of PEC sensors. Specially, Zn-Co doped C, CdS QDs and HMA were sequentially modified onto the electrode surface via the drop-coated method, and the C base rich DNA strand was then immobilized onto the modified electrode. As the C base in DNA specifically recognized Ag+, it formed the C-Ag+-C complex in the presence of Ag+, which created a spatial steric hindrance, resulting in a reduced PEC response. The sensing platform is sensitive to Ag+ in the range of 10.0 fM to 0.10 µM, with a limit of detection of 3.99 fM. This work offers an ideal platform to determine trace heavy metal ions in environmental monitoring and bioanalysis.
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