Journal of Materiomics
·
2025
·
IF 9.6
Jiang-Hu Yu,Yu Wang,Chong-Yu Wang,Hao Liang,Yi-Lin Liu,Ze-Yuan Yang,Yi-Xin Zhang,Jing Feng,Zhen-Hua Ge
The extensive utilization of thermoelectric (TE) conversion technology necessitates stricter performance requirements for bismuth telluride (Bi 2 Te 3 )-based commercial materials. Despite the numerous optimization methods available for Bi 2 Te 3 -based materials, each optimization method has a certain upper limitation, and combining multiple strategies can achieve the optimal thermoelectric figure of merit ( zT ). In this study, the thermoelectric properties of (Bi,Sb) 2 Te 3 materials are enhanced through the combined use of the heavy element Pb to regulate carrier concentration and the In element to optimize the band structure. Notably, indium (In) can suppress p-type antisite defects, which generate abundant Te vacancies, and help regulate the carrier concentration to its optimal level. This co-doping strategy achieves optimal carrier concentration, thereby enhancing the power factor (PF=4.57×10 3 μW⸱m –1 ⸱K –2 ), and generating abundant dislocations, the presence of the rich nano-second phase Sb 2 O 3 contributes to reduced lattice thermal conductivity. Consequently, a peak zT value of 1.41 at 323 K and a high average zT value of 1.23 between 300 K and 500 K are achieved. Additionally, two pairs of thermoelectric modules, composed of p-type (Bi 0.42 Sb 1.58 ) 0.994 (In, Pb) 0.006 Te 3 and zone-melted n-type Bi 2 Te 2.7 Se 0.3 , demonstrate a conversion efficiency of 7.3% at a temperature difference of 250 K. This underscores the promising potential of these thermoelectric modules in commercialization. Thus, this study demonstrates the feasibility of combining multiple strategies and is expected to provide a potential reference for other thermoelectric systems.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2023
·
IF 22.1
Jie Tian,Zhijian Wang,Yaqin Hou,Yatao Yang,Haijun Chen,Zhanggen Huang
Inorganic Bi-based halide perovskites have attracted significant attention in the field of CO 2 photoreduction due to their excellent optoelectronic conversion performance and low toxicity. However, the inherent strong localization of electron-hole pairs remains the main factors limiting charge carrier transport and CRR performance. In this work, CBSB-x NCs with different Bi/Sb ratios were synthesized assisted by ultrasound methods to manipulate carrier behavior and assess CRR performance. The photoelectrochemical properties revealed that incorporation of Sb effectively suppressed nonradiative recombination and improved transport efficiency of charge carriers. Among the bimetallic variants, CBSB-1 NCs exhibited enhanced catalytic performance in CO production, with a yield of 38.77 μmol·g −1 and a high selectivity of 96.53 %. In-situ DRIFTS and DFT calculations indicated that Sb as co-catalytic sites promote charge transfer at the Bi-Br-Sb interface, accelerate the rapid evolution of b-CO 3 2- to HCOO - and significantly reduce the reaction energy barrier of CO.
研究领域:
材料科学
·
化学工程
·
环境科学
·
纳米技术
·
光化学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Tong Sun,Kuan Wang,Yuan-Xiao Du,Jian-Gang Chen,Xin-Peng Li,Zhen-Hong He,Xiaodong Hao,Weitao Wang,Huan Wang,Zhao-Tie Liu
The photocatalytic conversion of CO₂ into value-added chemicals using solar energy is a crucial strategy for achieving carbon neutrality. However, existing semiconductor catalyst systems suffer from suboptimal conversion efficiencies due to inefficient charge separation and transfer. The precise modulating surface microenvironment of semiconductor catalyst contributes an effective approach to address these limitations in photocatalytic applications. This study proposes a precise dual-modification strategy to modulate the surface microenvironment by incorporating Co 2+ incorporation and in situ generating Bi sub-nanoclusters in ultrathin BiOCl nanosheets. This approach synergistically establishes spin-polarization effects and interfacial ohmic contacts, while enhancing the intrinsic built-in electric field. Consequently, it drives efficient charge separation and transfer. Mechanistic analyses via theoretical simulations and in situ experiments reveal that the engineered spin polarization facilitates electron transfer through aligned magnetic moments, while the formed ohmic contact eliminates interfacial potential barriers, collectively lowering the energy barrier for CO 2 * and COOH* formation. The optimized 3 %Co-BBOC catalyst demonstrates exceptional CO₂-to-CO conversion performance with a production rate of 58.25 μmol·g −1 ·h −1 , representing a 6.6-fold enhancement over pristine BiOCl. The present work elucidates a dual-functional synergistic mechanism of modulating the surface microenvironment by integrating spin manipulation and interfacial engineering, providing fundamental insights for designing advanced photocatalytic systems with optimized charge transport and surface reaction dynamics.
研究领域:
光催化
·
材料科学
·
环境科学
·
纳米技术
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
SYNTHETIC COMMUNICATIONS
·
2024
·
IF 1.8
Haiyan Xu,Yuanyuan Huang,Yinchun Liang,Nan Wang,Dejun Dong,Mengke Wang,Weichun Huang,You Zi,Zhanping Yang
Herein, we present an efficient synthesis method utilizing Bi quantum dots (QDs) as catalysts for the photochemical oxidative coupling of thiols to disulfides under mild conditions. The protocol offers low catalyst loading, simplicity in reaction setup as well as high efficiency. Aromatic thiols and aliphatic thiols are successfully transformed into disulfides with good to quantitative yields, demonstrating tolerance to various substituents and heterocycles. Additionally, the protocol extends to the synthesis of asymmetric disulfides and allows for gram-scale synthesis.
研究领域:
催化
·
有机化学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Chan Yang,Yarong Hu,Sanxiu Li,Qun Huang,Juan Peng
Electrocatalytic reduction of CO2 into valuable fuels and chemical feedstocks in a sustainable and environmentally friendly manner is an ideal way to mitigate climate change and environmental problems. Here, we fabricated a series of self-supporting Bi–Sb bimetallic nanoleaves on carbon paper (CP) by a facile electrodeposition method. The synergistic effect of Bi and Sb components and the change of the electronic structure lead to high formate selectivity and excellent stability in the electrochemical CO2 reduction reaction (CO2RR). Specifically, the Bi–Sb/CP bimetallic electrode achieved a high Faradic efficiency (FEformate, 88.30%) at −0.9 V (vs RHE). The FE of formate remained above 80% in a broad potential range of −0.9 to −1.3 V (vs RHE), while FECO was suppressed below 6%. Density functional theory calculations showed that Bi(012)–Sb reduced the adsorption energy of the *OCHO intermediate and promoted the mass transfer of charges. The optimally adsorbed *OCHO intermediate promoted formate production while inhibiting the CO product pathway, thereby enhancing the selectivity to formate synthesis. Moreover, the CO2RR performance was also investigated in a flow-cell system to evaluate its potential for industrial applications. The bimetallic Bi–Sb catalyst can maintain a steady current density of 160 mA/cm2 at −1.2 V (vs RHE) for 25 h continuous electrolysis. Such excellent stability for formate generation in flow cells has rarely been reported in previous studies. This work offers new insights into the development of bimetallic self-supporting electrodes for CO2 reduction.
研究领域:
材料科学
·
电化学
·
催化
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Muhua Chen,Shang Wei,Jiayi Wu,Jingrun Li,Bo Fu,Xinbao Zhu
Visible light driven antibiotic degradation with metal-organic frameworks (MOFs) has been regarded as a feasible and efficient approach. Herein, Bi-based MOF (CAU-17) was synthesized and used for tetracycline (TC) removal. To enhance the photocatalytic performance, sulfur (S) element was doped on CAU-17 through solvothermal process. Characterization results verified that S element was successfully doped on CAU-17 and distributed uniformly. The introduction of S element could boost the generation of oxygen vacancies and tune the band gap of CAU-17. By optimizing the S content, the band gap energy (E g ) of CAU-17–0.02 S sample (0.02 g thiourea was added during the synthesis) reduces from 3.57 to 3.37 eV compared to pristine CAU-17. In addition, the visible light response was enhanced and the charge transfer resistance was reduced. TC removal tests demonstrated that CAU-17–0.02 S exhibited a removal efficiency of 62.9%, and the degradation rate constant is 1.44 times than that of bare CAU-17. Reactive species trapping experiment indicated h + ,·OH and·O 2 - all promoted the degradation of TC, following the order of h + >·OH> ·O 2 - . Moreover, CAU-17–0 . 02 S presented a good reusability with slight performance loss after four cycles.
研究领域:
环境科学
·
材料科学
·
光催化
·
水处理
✓ 已验证
产品关联
DOI
高影响因子
ChemSusChem
·
2021
·Vol. 14
·期 16
·3293-3302
·
IF 8.928
Dawei Zhao,Yimin Xuan,Kai Zhang,Xianglei Liu
Graphical Photocatalytic CO 2 reduction : Benefiting from the synergistic effect of local high electron density at active sites and thermodynamic bicarbonate assistance, the hierarchical Bi@Bi 2 MoO 6 composite simultaneously shows good photocatalytic CO 2 reduction activity and high ethanol selectivity (92 %). Furthermore, bicarbonate ions play an important role in the formation of long-chain products due to the C−C coupling between derivative carbene intermediates and other carbon-containing intermediates. Photocatalytic CO 2 reduction is a sustainable and inexpensive method to solve the energy crisis and the greenhouse effect. However, the major stumbling blocks such as poor product selectivity, low yield of the multi-carbon products, and serious recombination of electron-hole pairs hinder practical application of photocatalysts. Herein, a high-performance Bi@Bi 2 MoO 6 photocatalyst, Bi nanoparticles grown on the surface of Bi 2 MoO 6 nanosheets with oxygen vacancies, was fabricated via a simple solvothermal approach. Benefiting from the abundant active sites and effective separation of photogenerated carriers of Bi 2 MoO 6 nanosheets, and the localized surface plasmon resonance effect of Bi nanoparticles, the Bi@Bi 2 MoO 6 sample exhibited great photocatalytic CO 2 reduction activity. Furthermore, adding NaHCO 3 into the system not only significantly increased the C 2 H 5 OH generation rate but also enhanced the product selectivity. In the photocatalytic measurement (0.17 mol L −1 CO 2 -saturated NaHCO 3 solution), the highest formation rates of CO, CH 3 OH, and C 2 H 5 OH were reached at 0.85, 0.59, and 17.93 μmol g −1 h −1 (≈92 % selectivity), respectively.
研究领域:
环境科学
·
材料科学
·
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2022
·Vol. 128
·期 9
·1-10
·
IF 2.983
Wu Xiang-Feng,Fu Yun-Xuan,Chang Tian-Long,Jia Yun-Ning,Shang Jia-Lu,Wang Hui,Fan Zi-Hao,Wang Chen-Xu,Su Jun-Zhang,Ci Li-Jie
Bi nanoparticles were used to fabricate Bi/Bi 2 O 3 heterojunction by an in situ sintering method in a muffle furnace. The experimental results show that the surface plasmon resonance (SPR) effect and oxygen vacancy (OV) defects of Bi/Bi 2 O 3 hybrids can enhance the visible-light absorption and carrier separation efficiency, and thus improve the photocatalytic activity of Bi/Bi 2 O 3 composites for tetracycline (TC) degradation under visible-light illumination. Moreover, by means of increasing the calcination time of Bi nanoparticles, the photocatalytic degradation efficiency of the as-prepared hybrids shows a tendency of first increasing and then decreasing. When the calcination time was 15 min, a maximum value of 81.7% was reached within 60 min. This is higher than that of 16% of the pristine Bi nanoparticles. In addition, h + plays a major role during the degradation reaction of TC. This study can provide promising guide for the rational design and development of Bi-based photocatalysts and degradation of antibiotics under solar light illumination.
研究领域:
材料科学
·
环境科学
·
化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Xiushuai Guan,Xiaochao Zhang,Changming Zhang,Rui Li,Jianxin Liu,Yunfang Wang,Yawen Wang,Caimei Fan,Zhong Li
Photocatalysis CO 2 reduction into high-value-added chemical feedstocks is desirable for simultaneously addressing the solar energy storage, CO 2 excess and energy shortage issues. In this work, a kind of original S-scheme BiOBr-(0 0 1)/Bi 2 SiO 5 /Bi (OSB) heterostructure photocatalyst with rich oxygen vacancies is in-situ synthesized, which significantly promotes the photocatalytic CO 2 reduction performance. Interestingly, the lower formation energy of oxygen vacancy exhibits the easy feasibility on the BiOBr-(0 0 1) surface via the assistant of ultrasound. There exists the highest photocatalytic CO 2 reduction activity to CO of 234.05 μmol g -1 h −1 for OSB-20 sample (ultrasound time: 20 min), higher 3.3 times than OSB-0 sample (without ultrasound). Combined with experimental and calculated results, the significative formation mechanism, widened light-response range, highly-efficient separation/transfer paths and improved redox-reduction abilities of photogenerated electron-hole pairs for S-scheme OSB-20 heterostructure are investigated and proposed. Our findings provide new insights for the construction and synthesis of the S-scheme Bi-based heterojunction photocatalyst system.
研究领域:
材料科学
·
环境科学
·
化学工程
·
光化学
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qiliang Zhu,Wenxuan Huang,Jianhua Shen,Haibo Jiang,Yihua Zhu,Chunzhong Li
Metal halide perovskite nanocrystals have garnered significant attention in the realm of photocatalytic CO 2 reduction in recent years owing to their remarkable reducing properties and high selectivity. However, the issue of low photocatalytic activity due to severe carrier recombination phenomena in perovskite has posed a significant challenge. To address this, a one-pot in-situ preparation strategy was employed to create a BiOBr/Bi-doped perovskite nanocrystal S-scheme heterojunction, resulting in a significant improvement in the CO 2 photoreduction performance. The heterojunction material exhibited a CO yield of 151.56 μmolg -1 h −1 , with a selectivity for CO of 93.6 %. The molar ratio of the components was modulated using an in-situ water aging strategy, yielding a photocatalyst performance that exceeded that of pure BiOBr. The synthesis strategy of one-step in-situ preparation of heterojunctions overcomes the problem of insufficient bonding caused by two-step methods. And various characterizations and DFT calculations strongly support the S-scheme mechanism of the photocatalyst. The active site effectively reduces the energy barrier for the transition from *COOH to *CO intermediate, thereby significantly improving photocatalytic activity.
研究领域:
材料科学
·
光催化
·
纳米技术
·
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 38
·13405-13414
·
IF 7.059
Zhi-Gang Liu,Zhen-Hua Tang,Song-Cheng Hu,Di-Jie Yao,Fei Sun,De-Yang Chen,Xiao-Bin Guo,Qiu-Xiang Liu,Yan-Ping Jiang,Xin-Gui Tang
Progress in energy storage ceramics for applications has been of interest owing to their clean green nature and excellent ferroelectric/dielectric performances. In this study, lead-free Sm-doped 0.95BaTiO3–0.05Bi(Mg0.5Ti0.5)O3 (BT–BMT–xSm) relaxor ferroelectric ceramics were synthesized and confirmed to be an appropriate material for storage devices. After the introduction of Sm2O3 into BT–BMT ceramics, their hysteresis loops gradually shrank and became slender, which is beneficial to achieving high efficiency energy storage in ceramic capacitors. The maximum recoverable energy density for the BT–BMT–xSm (x = 0.03) sample reached 3.86 J cm−3 at normal temperature, and its corresponding energy efficiency reached 81.6%. Moreover, it was found from impedance spectroscopy that the breakdown field strength is related to the oxygen defect content in the samples. Ceramic samples with fewer defects have better insulation performance, which means that a high breakdown field strength will be obtained. With proper doping, enhanced relaxor behaviour and breakdown field strength were obtained to achieve excellent energy storage properties.
研究领域:
材料科学
·
能量存储
·
陶瓷
·
铁电材料
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2020
·Vol. 12
·期 32
·17064-17073
·
IF 6.895
Jinghua Li,Daoming Zhu,Weijie Ma,Yang Yang,Ganggang Wang,Xiaoling Wu,Kunlei Wang,Yiran Chen,Fubing Wang,Wei Liu,Yufeng Yuan
Hepatocellular carcinoma is the fourth leading cause of cancer-related deaths globally. Advanced nanomaterials have emerged as effective approaches to liver cancer therapy such as photothermal therapy. However, limited penetration depth of photothermal agents (PTAs) activated in the NIR-I bio-window and thermoresistance due to heat shock proteins restrict the therapeutic efficacy of PTT in HCC. Herein, we prepared a Bi@ZIF-8 (BZ) nanomaterial by a simple one-step reduction method. Then, gambogic acid, a natural inhibitor of Hsp90, was efficiently loaded onto the BZ nanomaterial via physical mixing. The characterization of the nanomaterial and release of GA due to pH change or NIR-light irradiation were separately studied. Photothermal conversion efficiency was calculated, and therapeutic studies were carried out in vitro and in vivo. This nanomaterial exhibited a significantly enhanced drug release rate when the temperature was increased under acidic conditions and had good light stability under laser irradiation and a photothermal conversion efficiency of about 24.4%. In addition, this novel nanomaterial achieved good therapeutic effects with less toxicity in vitro. The BZ nanomaterial loaded with GA caused tumor shrinkage as well as disappearance and effectively downregulated Hsp90 expression in tumors in vivo. Moreover, this novel nanomaterial exhibited good biocompatibility and potential for application in low-temperature PTT with excellent tumor destruction efficacy.
研究领域:
肿瘤学
·
纳米医学
·
生物材料学
✓ 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）