MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Longqi Yao,Zhihua Zhao,Chen Chen,Zhigang Shao,Lan Wu
Amine-based gases have become an important indicator for detecting the decay of seafood, especially during the transportation and storage process. Triethylamine (TEA) is continuously produced as a result of slow decay, therefore, detecting the release of TEA from the food spoilage to indirectly measure the freshness of seafood has become a crucial method. However, the current TEA sensors frequently encounter issues such as low sensitivity, poor selectivity, or the necessity for higher operating temperatures, all of which hinder their practical application in seafood quality detection. In our work, for the first time, the gas-sensitive response of Bi 2 S 3 to TEA at room temperature (25 ℃) was improved by the composite of ZnO nanoparticles. The response to 100 ppm TEA is 2.51, which is 3.7 times that of pure Bi 2 S 3. The response/recovery time is 49/270 s. The materials structure and composition were studied by the methods like XRD, SEM, XPS, FTIR, and TEM, and the surface area of the nanocomposites was 24.6 m 2 /g, which could provide more adsorption sites. Then a response mechanism was proposed based on those characterization results. Meanwhile, the experimental verification shows that the sensor have excellent selectivity, repeatability and stability. Finally, a TEA detection equipment was designed to effectively detect the TEA produced by decayed marine fish. This work reports the first example of fabrication Bi 2 S 3 /ZnO Nanocomposites for TEA Gas Sensors at room temperature, and thus it’s also the first report about the application of Bi 2 S 3 /ZnO gas sensor for food safety. The gathered results reveal great prospects of TEA gas sensors for the food quality monitoring during transportation and storage.
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MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2024
·
IF 4.2
Jianlin Chen,Zihan Wu,Shu Chen,Wei Zhao,Yu Zhang,Wenxia Ye,Ruoxi Yang,Li Gong,Zhuoyin Peng,Jian Chen
Zinc oxide nanorod arrays (ZnO NRAs) have been previously introduced as electron transport layer (ETL) of perovskite solar cells (PSCs) due to their high electron mobility and unique textured morphology. However, the presence of hydroxyl and oxygen vacancies on the surface of bare intrinsic ZnO NRAs may act as defect centers leading to carrier nonradiative recombination and the device photovoltaic performance degradation. Here, we propose a mutilayer SnO 2 /Al-doped ZnO nanorod arrays/SnO 2 (SnO 2 /AZO NRAs/SnO 2 ) composite to be utilized as ETL of all-inorganic CsPbBr 3 PSCs. The influence of AZO NRAs with various Al ion (Al 3+ ) doping content on the performance of CsPbBr 3 PSCs was explored. The hole-free carbon-based CsPbBr 3 PSCs with an architecture of FTO/SnO 2 /AZO NRAs/SnO 2 /CsPbBr 3 /carbon based on 1 at% AZO NRAs exhibited the best photovoltaic performance with a champion power conversion efficiency (PCE) of 7.11 %, open-circuit voltage ( V oc ) of 1.46 V, short-circuit current density ( J sc ) of 6.88 mA/cm 2 , and fill factor ( FF ) of 71.1 %, compared with the bare intrinsic ZnO-based counterpart with a PCE of 3.45 %, V oc of 0.80 V, J sc of 8.46 mA/cm 2 , and FF of 51 %, respectively. The photovoltaic performance enhancement can be atrributed to enhanced light collection and electron extraction capability, with lower open-circuit voltage loss and more suitable interface band alighment. It is notable that the AZO NRAs were prepared by a facile electrodeposition approach to obtain large-area textured ETLs. This strategy may also be applicable to the photovoltaic performance improvemet of all types of PSCs.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Diming Zang,Xiangyang Wei,Qingyuan Liu,Ying Li,Rui You
The detection of hydrogen sulfide (H 2 S) plays a critical role in environmental monitoring and breath analysis for medical diagnostics. For metal oxide semiconductor film-based gas sensors, the quality of the gas-sensitive material and the method of forming the gas-sensitive film on planar electrodes are critical determinants of sensor performance. In this study, a flower-like ZnO@ZnWO 4 heterojunction was directly grown on the surface of a micro-hotplate for gas sensor applications using a two-step method involving block copolymer self-assembly and chemical vapor deposition. The gas sensors demonstrated exceptional performance in detecting H 2 S over a range of 50 ppb to 50 ppm. At an operating temperature of 200 °C, the gas sensor exhibited a remarkable response value (R=127.31) for 5 ppm H 2 S and an outstanding selectivity coefficient of 117.4. Additionally, the sensor maintained 95 % of its original response value over a month. These superior performance metrics are attributed to the n-n heterostructure between ZnO and ZnWO 4 , along with the extensive specific surface area and the presence of oxygen vacancies in the flower-like morphology. This novel approach not only enhances H 2 S detection performance but also significantly contributes to the development of gas sensors crucial for environmental monitoring and human health protection.
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Materials Today Sustainability
·
2025
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IF 7.9
Pengyuan Guan,Yongjie Zhao,Yihui Wu,Weixian Li,Xiao Zhang,Xiang Gao,Xiaoxia Ou,Wai Siong Chai,Yinfeng He,Hao Nan Li
CuO–ZnO–ZrO 2 catalyst attracted significant attention for CO 2 hydrogenation to methanol. Gyroid-based triply period minimal surface lattice structures feature highly ordered porous networks, which could be used to enhance catalytic performance and efficiency. This paper presents a formulating and one-step calcination strategy that united the removal of polymer resin and calcination of catalyst precursor at one temperature. This enabled 3D printing gyroid-structured CuO–ZnO–ZrO 2 catalyst for CO 2 hydrogenation while minimizing the impact of overheating on the catalyst performance. A photocurable formulation loaded with CuO–ZnO–ZrO 2 precursor was developed. Using the optimized formulation, gyroid structures with varying pore sizes were successfully printed and calcined. The optimal lattice wall thickness that balances porosity and structural stability was identified. The results indicate that the resin used for 3D printing was successfully removed at a lower temperature and the catalytic activity of the 3D-printed structured catalyst was retained through the one-step calcination process while the gyroid lattice geometry can enhance catalytic efficiency than cylindrical structure.
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DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 9
·4048-4053
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IF 3.5
Lin Gao,Guoqiang Ding,Lei Zhu,Zhanqiu Yu,Hongju Li,Guoqiang Li,Yulei Zhu,Hongwei Xiang,Xiaodong Wen,Yong Yang,Yongwang Li
The dimethyl maleate hydrogenation activity of Cu, ZnO-X and physically mixed Cu+ZnO-X samples was systematically investigated to probe the essential role of ZnO in ester hydrogenation processes. Cu samples exhibited high CC bond hydrogenation ability with dimethyl succinate as the main product. Comparatively, ZnO was inactive in hydrogenation due to its weak ability to dissociate hydrogen while the CO group could be activated and adsorbed on the ZnO surface. Interestingly, physical mixing with ZnO significantly improved the CO hydrogenation activity of Cu samples. The H2-TPD results reveal the origin of “Cu–ZnO synergy”: hydrogen atoms formed on the copper surface can spill over to the ZnO surface and react with the adsorbed CO group.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Huayi Cai,Hui Zhang,Nan Gao,Yi Fang,Xinjian Xie,Yulong Fang,Guifeng Chen
Exploring green methods for removing organic pollutants from water bodies has attracted significant attention. In this research, N-ZnO/p-BN adsorption-photocatalytic composites were prepared by a simple solvothermal method, and various analytical characterizations confirmed the formation of B-O-Zn bonds at the heterojunction interface that facilitated the separation of photogenerated carriers and revealed a type-II mechanism of charge transfer in the heterostructure. The photodegradation efficiency for oxytetracycline (OTC) by composites with different N-ZnO loadings was investigated under simulated sunlight, and the degradation efficiency of the optimal sample (50 wt% N-ZnO/p-BN) for 50 mg/L OTC reached 92.2 % at 120 min. Efficient pollutant enrichment, broadened light absorption range, high dispersion of the photocatalysts, and effective charge migration are all important factors for improving photocatalytic activity. Furthermore, the photocatalytic process was further investigated, experiments showed that the N-ZnO/p-BN composites were universally applicable under a variety of conditions and possessed the characteristics of low dosage and high degradable concentration. Finally, a rational photocatalytic mechanism was proposed for the degradation system and the degradation pathways of the main degradation model OTC were analyzed and deduced. Therefore, this study provides new ideas for designing high-performance adsorption-photocatalytic composites.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yanghai Gui,Shuaishuai Zhao,Kuan Tian,Jintao Wu,Huishi Guo,Xiaoyun Qin,Xiaomei Qin,Dongjie Guo,Guangwen Zheng,Yao Guo
N-methyl pyrrolidone (NMP) is an important organic compound that is widely used in many industrial fields. Due to its volatility and toxicity, the detection of NMP content becomes crucial. Plasma treatment is an efficient method that utilizes high-energy ions generated by plasma to change the surface properties of materials, which can dramatically improve the performance of gas sensors. In this paper, ZnO nanorods were in-situ grown on ceramic tubes via hydrothermal method, followed by oxygen plasma treatment for different time, and the gas-sensing performance of the treated ZnO nanorods was investigated. In addition, the density functional theory calculation was used to explore the potential mechanism for the improvement of gas-sensing performance. The results show that ZnO treated with oxygen plasma for 60 s has more oxygen vacancies (45.53 %) and higher adsorption energy (−1.06 eV) to NMP. The ZnO-60 gas sensors have excellent selectivity to 100 ppm NMP at 210 °C, with a response value up to 197.58, low detection limit (94 ppb), and short response/recovery time (75 s/27 s). This study not only provides important theoretical and experimental basis for further optimizing the design and manufacture of gas sensors, but also provides strong support for environmental monitoring and human health protection.
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Surfaces and Interfaces
·
2025
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IF 6.3
Zhen Ma,Zehua Han,Menghui Wan,Zhiqiang Wang,Minjie Gao,Yanbao Zhao,Lei Sun
In recent years, there has been a notable focus on the development and design of multifunctional drug delivery systems tailored for photothermal, photodynamic, and chemotherapy triple-modality cancer treatment. The paper presents the utilization of gold nanorods (AuNRs) for photothermal effect, zinc oxide (ZnO) for photodynamic effect, mesoporous polydopamine (mPDA) loaded with curcumin (Cur), and 1-tetradecanol (TD) as a temperature-sensitive gating switch to achieve integration of functional organic/inorganic nanomaterials. The core-shell structural nanocarriers (AuNRs@ZnO@mPDA-Cur/TD) achieved a drug loading rate of 178 mg/g. It is important to note that the pH-responsive release properties of Cur have been observed due to the acid response of mPDA. Furthermore, the photothermal effect of AuNRs and mPDA facilitates the thermal-induced melting of TD and subsequent release of Cur upon near-infrared (NIR) irradiation, thereby achieving an effective integration of photothermal therapy and chemotherapy. Simultaneously, under NIR excitation, AuNRs inject thermal electrons into the conduction band of ZnO, leading to the generation of singlet oxygen species that confer remarkable photodynamic healing capabilities to the as-prepared carriers. The combined treatment involving photothermal, photodynamic, and chemotherapy demonstrated synergistic effects and superior efficacy compared to individual treatments. The core-shell nanodrug carrier AuNRs@ZnO@mPDA developed in this study exhibits pH-, NIR-, and temperature-responsive drug release properties, highlighting the synergistic impact of photothermal, photodynamic, and chemotherapy on tumor therapy. This research provides a novel concept and preparation strategy for a multifunctional smart drug delivery platform with integrated therapeutic efficacy.
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CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Jiaoqin Liu,Jingjing Zhang,Mengye Jia,Rui Ma,Ruijuan Qu,Zunyao Wang,Zhaoguo Liu,Yu Jiang,Haoxiang Zhang,Yujia Bai,Riya Jin,Yina Qiao,Jiangtong Wu
An efficient nitrogen (N)-ZnO photocatalytic composite was synthesized and well characterized to demonstrate its superior photocatalytic performance as well as the degradation kinetics of 24 ILs in an N-ZnO/Xe lamp irradiation system, as well as the pathways and mechanisms of the photocatalytic degradation (PCD) of typical ionic liquids [OMIm]Br was systematically studied. To investigate the catalytic effect, nitrogen was synthesized from various inorganic and organic nitrogen compounds to ZnO. The NH 4 NO 3 -ZnO composite calcined at 300 °C with a molar ratio of NH 4 NO 3 to Zn(NO 3 ) 2 ·6H 2 O of 10:1 exhibited superior catalytic performance as assessed by SEM, TEM, FT-IR, UVDRS, BET surface area, XPS, and XRD characterizations. After 24 h of exposure to Xe lamp irradiation, all 24 ILs were significantly degraded by the introduction of 0.125 g/L of catalyst, whereas simulated sunlight alone resulted in minimal degradation. The pseudo-first-order rate coefficients ( k ) for PCD were closely related to the carbon chain length of the alkyl substituents and the type of anion. Multiple linear regression analysis indicated no linear correlation between the parameters E , H°, E th , and C v° from the Gaussian calculation and k . Conversely, a positive correlation was observed for E HOMO (B=0.742, β = 1.282, P = 0.011), q H+ (B=1.040, β = 3.284, P = 0.006), and G° (B=0.001, β = 5.400, P = 0.007) with k . Mass spectrometry analysis revealed that the primary PCD pathway for [OMIm]Br involved C-N and/or C-C bond breaking, mono-, di-, and tri-hydroxylation, single and double oxygen transfer, and bromo-substitution reactions.
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ChemSusChem
·
2024
·
IF 7.5
Guorui Ma,Haiqiang Mu,Zhenli Lv,Jiaxing Guo,Min Zhu,Yonghong Li,Xiaozhong Wang,Jing Li,Feng Li
Graphical In the work, a Bi/ZnO@ZnSe photocathode with a lattice-matching interface and long-life high-energy photoelectrons is designed for the photoelectrocatalytic conversion of CO 2 to CO, which achieves a Faradaic efficiency of 88.9 % at −0.9 V vs. RHE and demonstrates excellent stability. The key aspect of the photoelectrochemical CO 2 reduction reaction (PEC CO 2 RR) lies in designing cathode materials that can generate high-energy photoelectrons, enabling the activation and conversion of CO 2 into high-value products. In this study, a coaxially wrapped ZnO@ZnSe array heterostructure was synthesized using a simple anion exchange strategy and metallic Bi nanoparticles (NPs) were subsequently deposited on the surface to construct a Bi/ZnO@ZnSe photocathode with high CO 2 conversion capability. This array photocathode possesses a large aspect ratio, which simultaneously satisfies a low charge carrier migration path and a large specific surface area that facilitates mass transfer. Additionally, the barrier formed at the n-n heterojunction interface hinders the transfer of high-energy photoelectrons from ZnSe to lower energy levels, resulting in their rapid capture by Bi while maintaining a relatively long lifetime. These captured electrons act as active sites, efficiently converting CO 2 into CO with a Faradaic efficiency above 88.9 % at −0.9 V vs. RHE and demonstrating superior stability. This work provides a novel approach for synthesizing high-energy photoelectrode materials with long lifetimes.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xiaoxia Zhang,Zhipeng Zhou,Junjie Liao,Liping Chang,Jiancheng Wang,Weiren Bao
The ultra-deep removal of thiophene from coke oven gas (COG) is critical for the conversion of COG to methane. Currently, Cu/ZnO/Al 2 O 3 is considered as a promising sorbent for thiophene removal; however, its desulfurization performance is currently unable to meet the requirements for industrial applications. Here, a zirconium modification strategy is proposed to overcome this problem, allowing zirconium loaded copper-based sorbents (Cu/ZnO/Al 2 O 3 /ZrO 2 ) with significantly improved thiophene removal performance and high activity to be obtained. Characterization results showed that zirconium improved both the dispersion of copper and the concentration of Lewis acid sites on the sorbent surface. A ZrO 2 concentration of 2 % resulted in stronger Cu-Zn interaction, and the dispersion of Cu on the surface of the sorbent reached its maximum value (49.20 %). Additionally, the Lewis acid strength was also maximized, which greatly improved the desulfurization activity and resulted in a breakthrough adsorption capacity of thiophene (Q b-thiophene ) of 36.24 mg/g, which was about 17 % higher than that of the unmodified Cu/ZnO/Al 2 O 3 sorbent. These results demonstrate that the sulfur capacity of the sorbent can be increased by increasing the number of acidic sites on its surface, paving the way for ultra-deep thiophene removal in industrial applications.
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RSC Advances
·
2024
·Vol. 14
·期 25
·17814-17823
·
IF 3.9
Xuewei Jia,Yihong Wu,Zhiyang Liu,Yuxiang Dai,Tianxiao Li,Mingqi Gao,Chunping Xu
Polysaccharides are considered to be ideal green raw materials for enhancing biocompatibility and dispersion effects of nanoparticles. In this study, we coated and dispersed ZnO nanoparticles (NPs) using the denaturation–renaturation process of a triple helix glucan lentinan (LNT), induced by changes in pH value within the reaction system. Various ZnO/LNT composites with different particle sizes and crystal morphologies were prepared and characterized. The results demonstrated that renatured LNT (r-LNT) effectively encapsulated the {100} crystal planes of ZnO, preventing crystal growth during the renaturation process and resulting in smaller, uniformly dispersed nanoparticles. Among the samples, ZnO/r-LNT-2 exhibited significantly higher antimicrobial activity, and it had a certain inhibitory effect on various plant pathogens. It also displayed the highest inhibitory effect against Candida albicans, with a minimum inhibitory concentration (MIC) of up to 8 μg mL−1. Consistently, ZnO/r-LNT-2 generated the highest amount of reactive oxygen species (ROS), thus exhibiting the most effective antimicrobial activity. However, excessive introduction of the dispersant LNT may reduce these activities. This study provides a foundation for further exploring the detailed mechanism of ROS generation catalyzed by ZnO and for harnessing the full potential of this type of antimicrobial agent.
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