ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Dongxu Zhang,Weixuan Dong,Yanhong Liu,Xiaoqing Gu,Tianyu Yang,Qiang Hong,Di Li,Dongqi Zhang,Hongbo Zhou,Hui Huang,Baodong Mao,Zhenhui Kang,Weidong Shi
Photoassisted electrocatalysis (P-EC) emerges as a rising star for hydrogen production by embedding photoactive species in electrocatalysts, for which the interfacial structure design and charge transfer kinetics of the multifunctional catalysts remain a great challenge. Herein, Zn-AgIn5S8 quantum dots (ZAIS QDs) were embedded into 2D NiFe layered double hydroxide nanosheets through a simple hydrothermal treatment to form 0D/2D composite catalysts for P-EC. With evidence from transient photovoltage spectroscopy, we acquired a clear and fundamental understanding on the kinetics of charge extraction time and extraction amount in the 0D/2D heterojunctions that was proved to play a key role in P-EC. Upon light illumination, for HER, the optimized NiFe-ZAIS exhibits obviously reduced overpotentials of 129 and 242 mV at current densities of 10 and 50 mA cm–2, which are 22 and 33 mV lower than those of dark electrocatalysis, respectively. For OER, the NiFe-ZAIS electrode also shows low overpotentials of 220 and 268 mV at current densities of 10 and 50 mA cm–2, respectively, under light illumination, which were able to almost double the intrinsic activity. Finally, with NF@NiFe-ZAIS as both the cathode and the anode, the assembled electrolyzer only requires 1.62 V to reach the overall water splitting current density of 10 mA cm–2 under P-EC. This work provides a useful example for the profound understanding of the design and the kinetics study of multifunctional P-EC catalysts.
研究领域:
材料科学
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电化学
·
能源转换与存储
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Qiao Zhao,Hanbo Li,Yaan Cao
A series of the In(OH) 3 species modified ZnS (ZnS–In(OH) 3 X% (X = 2, 5, 7, 10)) photocatalysts were synthesized by a hydrothermal method . ZnS–In(OH) 3 X% (X = 2, 5, 7, 10) exhibited the improvement of photocatalytic activity for the photoreduction of CO 2 into CO compared with ZnS. Characterized by X-ray diffraction (XRD), fourier transforms infrared spectra (FT-IR), high resolution transmission electron microscope (HRTEM), X-ray photoelectron spectroscopy (XPS) valence band spectra, UV–vis diffuse reflectance spectra, photoluminescence (PL) and time-resolved PL decay curves, the crystal structure, band structure and behaviors of photogenerated charge carriers for photocatalyst were explored up. It was revealed that the modification of In(OH) 3 surface species on surface of ZnS can prolong the fluorescence lifetimes of photogenerated charge carriers, enhance the separate of photoinduced charge carriers efficiently and promote better matching between the band structure and the redox potential of the CO 2 /CO, resulting in improvement of photocatalytic activity efficiently for ZnS–In(OH) 3 X% (X = 2, 5, 7, 10) photocatalysts . This work may offer a new understanding to study the effect of surface species modification on photocatalytic performance of photocatalyst.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 4
·045514
·
IF 1.449
Jian Feng,Xiaosheng Yang,Rong Li,Xianjiong Yang,Hong Xu,Xiaolan Xi
Graphitic carbon nitride (g-C3N4) is the most stable allotrope of carbon nitride with a conjugated, two-dimensional polymer of s-triazine, which is considered as a promising photocatalyst in sustainable chemistry. The low surface area and quantum efficiency and fast electron-hole recombination of g-C3N4 restrict its practical application. The formation of two-dimensional mesoporous structure and the construction of proper semiconductor composites are two approaches to promote the effective separation of photogenerated exciton and reduce the charge transfer resistance, which is beneficial to restrain the recombination of exciton and improve photocatalytic hydrogen performance. In this work, two-dimensional mesoporous g-C3N4 nanosheets (MCNS) coupled with nonstoichiometric Zn-Cu-In-S (ZCIS) nanocrystals were synthesized by a hydrothermal method. The constructed ZCIS/MCNS composites possessed highly photocatalytic hydrogen evolution performance under visible light irradiation without any noble metal cocatalysts. The EIS spectra and transient photocurrent responses corroborated ZCIS/MCNS had higher separation and transportation efficiency of photogenerated electron and hole. The incorporation of ZCIS into MCNS reduced the charge transfer resistance and enhanced the charge transfer efficiency. As the result, the photocatalytic hydrogen evolution rate of ZCIS/MCNS was higher than those of pure ZCIS and MCNS. 10-0.2ZCIS/MCNS showed a highest H2 production rate of 12.3 μmol h−1 over 100 mg photocatalyst without cocatalysts. This work supplied a feasible strategy to construct ZCIS/MCNS composites for the exploitation of solar energy.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Jiuhu Zhao,Gaige Zhang,Jiansheng He,Zhengzhong Wen,Zhi Li,Tingkun Gu,Ran Ding,Yongji Zhu,Rongshu Zhu
In/H-Beta catalyst was prepared by optimizing the support, concentration of ion exchange liquid and calcination temperature to investigate the effects of synthesis conditions on catalytic activity of selective catalytic reduction of NO x with CH 4 . The results showed that the In/H-Beta catalyst exhibited the superior activity when concentration of exchange liquid was 0.033 M and calcination temperature was 500 °C, the NO x removal ratio could reach 97.6%. In addition, reaction conditions could affect the catalytic performance. When O 2 concentration was 10%, CH 4 :NO ratio was no less than one, space velocity was lower than 23600 h −1 and NO initial concentration was no more than 700 ppm, In/H-Beta could exhibit superior catalytic activity. Moreover, the catalytic performances of In/H-Beta catalysts were discussed after enduring H 2 O or/and SO 2 . This novel strategy could open the door for selective catalytic reduction of NO x with CH 4 .
研究领域:
环境科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Yayu Guan,Jiaying Yan,Yuyu Liu,Fanghua Ning,Jin Yi,Jiujun Zhang
Electrochemical CO 2 reduction reaction (eCO 2 RR) is considered an efficient approach to produce value-added chemicals and fuels. In this paper, a series of MOF-derived composite catalysts with coexisting In 2 O 3 and ZnO are fabricated using a simple process for eCO 2 RR to produce formate. The Zn-In-O/800 catalyst achieves a formate Faradaic efficiency (FE HCOO− ) of 94.25 % at −1.16 V vs. RHE, which can maintain over 89 % after 30 h in a stability test. The electrochemical evidence and density functional theory analysis show that the strong interface effect between In 2 O 3 and ZnO can enhance the CO 2 adsorption and activation, and promote the conversion of CO 2 to formate. In addition, the ZnO phase can protect In 2 O 3 , as the main active site, from being reduced to a certain extent for a long time under negative potential, which ensures the high stability of the composite catalyst.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 7
·1-11
·
IF 5.3
Zhao Zhihua,Yao Longqi,Zhang Shuaiwen,Shi Qingsheng,Rahmatullah Abu Bakker Md,Wu Lan
Industrialization and agricultural demand have both improved human life and led to environmental contamination. Especially the discharge of a lot of poisonous and harmful gases, including ammonia, ammonia pollution has become a pressing problem. High concentrations of ammonia can pose significant threats to both the environment and human health. Therefore, accurate monitoring and detection of ammonia gas are crucial. To address this challenge, we have developed an ammonia gas sensor using In(OH) 3 /Ti 3 C 2 T x nanocomposites through an in-situ electrostatic self-assembly process. This sensor was thoroughly characterized using advanced techniques like XRD, XPS, BET, and TEM. In our tests, the I/M-2 sensor exhibited remarkable performance, achieving a 16.8% response to 100 ppm NH 3 at room temperature, which is a 3.5-fold improvement over the pure Ti 3 C 2 T x MXene sensor. Moreover, it provides swift response time (20 s), high response to low NH 3 concentrations (≤ 10 ppm), and excellent long-term stability (30 days). These exceptional characteristics indicate the immense potential of our In(OH) 3 /Ti 3 C 2 T x gas sensor in ammonia detection. Graphical Abstract
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Catalysis
·
2020
·
IF 12.35
Junli Guo,Lingling Yang,Zhida Gao,Chenxi Zhao,Ye Mei,Yan-Yan Song
Maintaining the high activity of an enzyme is a fundamental requirement to widen the application of metal–organic frameworks (MOFs) in the biotechnology, biosensor, and biomedicine fields. However, it is still challenging to monitor and understand an MOF environment-related activity for an enzyme. Here, we developed a MOFs-in-nanochannels configuration for broadening the biocatalytic activity of an enzyme in MOFs on demand. ZIF-8 [Zn(mim)2, Hmim = 2-methylimidazolated] grown in TiO2 nanochannels is used as the platform, and cytochrome C (CytC) is used as a model enzyme encapsulated in ZIF-8. The enzymatic catalytic process converts 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) to a positively charged product (ABTS+). On the basis of current–voltage properties, the change of ion transport characteristics in nanochannels can be monitored with time. The ZIF-8 encapsulating CytC molecules not only exhibit a significantly enhanced enzymatic activity in a wide temperature region (37–80 °C) but also have remarkably long storage stability at room temperature. The results of quantum mechanical calculation indicate that the Fe–S bond of CytC is inclined to break in the environment of ZIF-8 owing to the confinement effect of the MOF structure, favorable for enzymatic catalysis. The MOFs-in-nanochannel configuration provides an innovative and label-free design for the onsite monitoring of catalytic activity of an enzyme in MOFs, which holds great potential in constructing biosensing platforms with remarkable performance and stability.
研究领域:
生物技术
·
生物传感
·
生物医学
✓ 已验证
产品关联
DOI
高影响因子
LANGMUIR
·
2022
·
IF 4.331
Shenjie Li,Xiaoyu Gong,Zhiqiang Li,Minghui Yu,Yanyan Chen,Hao Yu,Shuang Wang,Hongyu Shao,Minghao Dou,Yuye Cheng
A novel interfacial reaction nucleation mechanism for the preparation of water-soluble Ag–In–S quantum dots (AIS QDs) was proposed in which interfacial acid regulates the concentration of hydroxide ions outside the complex and sulfur sources attack cations at the interface of the complex, covalent bonds between cations and sulfur sources are formed at the interface of the complex, and the nucleation and growth of crystals is finished at room temperature. By bypassing the heating process normally necessary for crystal nucleation and growth, AIS QDs can be produced on a large scale under simple, mild conditions. At the same time, the characteristics of this mechanism enable AIS QDs to be directly synthesized in an organic pollutant solution. This study represents a significant advance in the mechanism of crystal synthesis and contributes to the photocatalytic decomposition of organic pollutants from theory to practice.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Ning Sui,Yifeng Xu,Peng Zhang,Shuang Cao,Tingting Zhou,Tong Zhang
The crucial challenge to exploit effective ozone (O 3 ) gas sensors lies in developing novel functional sensing materials to meet the requirement of trace-level detection threshold (50 ppb). Metal oxide semiconductors (MOSs) with controllable heterogenous composites as high-performance sensing layers are expected to break through this bottleneck. This work proposes the hybridization of MIL-68 (In) and ZIF-8, which are employed as dual metal organic frameworks (MOFs) sacrificial templates to design n-n heterostructures . The derived In 2 O 3 backbone showed a hexagonal prismatic structure with a large aspect ratio. The robust architecture enabled the uniform decoration of mass of ZnO nanoparticles (NPs) on the surfaces without the damage of high porosity for the gas diffusion. Consequently, the optimal sensor with appropriate ZnO NPs loading amount exhibited trace O 3 detection ability as low as 15 ppb, which was attributed to the smart design of n-n heterostructure, rich active sites and improved oxygen-adsorbing capacity. Thus, this work inspires a new way to utilize the versatile dual MOFs template for constructing heterogenous composites as O 3 sensing materials.
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Xinjuan Du,Jindou Hu,Jing Xie,Aize Hao,Zhenjiang Lu,Yali Cao
The convenient modification of transition metal and the simultaneous adjustment of energy band are effective measures to improve the photocatalytic activity of titanium dioxide but remains challenging in photocatalytic hydrogen evolution field. Herein, In(OH) 3 -TiO 2 heterostructures were constructed by solid-state synthetic strategy under room temperature for tuning the band structure and accelerating the photoexcited charge separation to enhance the photocatalytic activity for hydrogen evolution. By the quantified modification of In(OH) 3 , the obtained In(OH) 3 -TiO 2 delivers an appreciable photocatalytic activity and stability for hydrogen evolution, which is 15.7 folds superior to commercial P25. Due to the narrowed band gap, the increased charge carrier density, the restrained recombination rate of photoexcited electron-hole pairs and the accelerated photogenerated charge separation, the In(OH) 3 -TiO 2 heterostructures thereby achieve the boosted photocatalytic hydrogen evolution performance. This work provides a feasible strategy to enhance the photocatalytic hydrogen evolution of TiO 2 via tuning the band gap and accelerating the photoinduced charge separation.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Jun He,Xiaoyu Qi,Jingjing Liu,Hao Zhang,Zhongliao Wang,Deliang Li,Shuwang Duo
Triethylamine is a typical volatile toxic gas that can cause respiratory system diseases, blood diseases, and eye lesions upon prolonged inhalation. To mitigate this problem, a highly sensitive triethylamine sensor was achieved by loading the precious metal Au onto hexagonal hollow prisms of In 2 O 3 . Prominently, the microstructure of the hollow hexagonal prisms was derived from Material Institute Lavoisier(MIL)-68(In), which provided a larger specific surface area and more active sites. The sensing test results manifested that the sensor based on 0.6% Au/In 2 O 3 owned the best sensing performance among all samples, especially with the response value of 476.3 ( R a / R g ) towards 100 ppm triethylamine at 200°C, which was 37 times higher than that of pristine In 2 O 3 sensor. Additionally, the stability deviation value was less than 5.6% and the selectivity ( Response triethylamine / Response ethanol ) reached up to 28.8. Such distinguished characteristics can be attributed to the delicate hollow hexagonal prisms structure and the decoration of Au, which accelerated gas molecules transport and enhanced oxygen molecule adsorption and dissociation. This work may open up new visas for morphology manipulation of triethylamine sensing materials and intrinsic mechanism of performance enhancement.
研究领域:
材料科学
·
传感器技术
·
环境监测
✓ 已验证
产品关联
DOI
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Han XiaoLe,Yu Fan,Lei JiaWen,Zhu Jiahua,Fu HaiYan,Hu JunCheng,Yang Xiao-Long
Water-soluble Cu-In-Zn-S quantum dots (CIZS QDs) with orange fluorescence have been synthesized with a glutathione (GSH) as stabilizer via facile a one-step hydrothermal method. The optimal reaction conditions of CIZS QDs including temperature, time, pH, and the molar ratios of precursors were studied. TEM results indicate that the aqueous-dispersible CIZS QDs are quasi-spherical, and the average diameters are 3.76 nm with excellent fluorescent stability. Furthermore, the cytotoxicity of CIZS QDs was investigated by the microcalorimetry combining with TEM and the IC50 was 10.2 μM. CIZS QDs showed a promising perspective in applications such as a fluorescent probe for bioimaging and biolabeling due to the low cytotoxicity and good biocompatibility. Moreover, the CIZS QDs can distinguish Pb2+ ion from other ions, offering great potentials in lead ion determination in drinking water. According to the results of UV, XRD, FL, PL, and ITC methods, the mechanism of CIZS QDs-Pb2+ assay is due to hydrogen bonding or van der Waals forces in the formation of Pb2+ and CIZS QDs.
研究领域:
材料科学
·
生物学
·
医学
·
环境科学
✓ 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）