Unlocking the potential of ultra-thin two-dimensional antimony materials:Selective growth and carbon coating for efficient potassium-ion storage

Antimony-based anodes have attracted wide attention in potassium-ion batteries due to their high theoretical specific capacities(∼660 mA h g^(-1))and suitable voltage platforms.However,severe capacity fading caused by huge volume change and limited ion transportation hinders their practical applications.Recently,strategies for controlling the morphologies of Sb-based materials to improve the electrochemical performances have been proposed.Among these,the two-dimensional Sb(2D-Sb)materials present excellent properties due to shorted ion immigration paths and enhanced ion diffusion.Nevertheless,the synthetic methods are usually tedious,and even the mechanism of these strategies remains elusive,especially how to obtain large-scale 2D-Sb materials.Herein,a novel strategy to synthesize 2D-Sb material using a straightforward solvothermal method without the requirement of a complex nanostructure design is provided.This method leverages the selective adsorption of aldehyde groups in furfural to induce crystal growth,while concurrently reducing and coating a nitrogen-doped carbon layer.Compared to the reported methods,it is simpler,more efficient,and conducive to the production of composite nanosheets with uniform thickness(3–4 nm).The 2D-Sb@NC nanosheet anode delivers an extremely high capacity of 504.5 mA h g^(-1) at current densities of 100 mA g^(-1) and remains stable for more than 200 cycles.Through characterizations and molecular dynamic simulations,how potassium storage kinetics between 2D Sb-based materials and bulk Sb-based materials are explored,and detailed explanations are provided.These findings offer novel insights into the development of durable 2D alloy-based anodes for next-generation potassium-ion batteries.

Soil Profile Concentration Distributions of Antimony and Bismuth across Southeastern Missouri (USA)

Recent research has suggested that increased industrial and technological utilization of antimony and bismuth necessitates greater research to determine the soil and water chemistry and the environmental risks associated with these elements. The near-total soil profile concentrations of antimony and bismuth were determined for key soil series across southeastern Missouri. The antimony concentrations ranged from 0.65 to 0.08 mg kg−1, whereas the bismuth soil profile concentrations ranged from 0.92 to 0.03 mg kg−1. Most pedons showed antimony concentrations ranging from 20 to 30 mg kg−1, whereas bismuth concentrations were commonly 10 to 20 mg kg−1. For soils having argillic horizons, antimony and bismuth concentrations were greater for the illuvial horizons than the eluvial horizons, whereas Entisols, Inceptisols, and one Vertisol showed rather uniform antimony and bismuth concentrations, features paralleling the soil texture distribution. Both antimony and bismuth showed significant correlations with iron.

Trace element compositions of pyrite and stibnite:implications for the genesis of antimony mineralization in the Yangla Cu skarn deposit,Northwestern Yunnan,China

The Yangla Cu skarn deposit is located in the central part of the Jinshajiang Suture Zone,southwest China,with a total reserve of 150 Mt Cu@1.03%.The newly discovered antimony orebodies at the depth of Yangla are strictly controlled by the stratum,structure,and lithology,which are lenticular and vein-like within the marble fracture zone,which can provide a window into multistage miner-alization and ore genesis at Yangla.Mineralization can be divided into three types,Cu–Pb–Zn(skarn)pyrite,galena,and sphalerite,Cu(porphyry)chalcopyrite and pyrite,and Sb(hydrothermal)stibnite and pyrite.The mineral assem-blages were stibnite+pyrite+calcite+quartz±minor scheelite in antimony ores.This study presents quantitative measurements of the trace element compositions of pyrite and stibnite from the Yangla antimony ores.Analysis of pyrite with electron probe microanalysis(EPMA)showed enrichment in Co,Ni,Sb,As,and Mo,and deficit in its S and Fe contents when compared to the stoichiometric con-centrations of S and Fe in pyrite.The Sb-related pyrite may belong to sedimentary-reworked genesis and may be modi-fied by hydrothermalfluids,thereby presenting a certain dif-ference(i.e.,crystal morphology,texture,and chemical com-position)compared to the skarn and porphyry Cu-related pyrite in the Yangla Cu skarn deposit.Analysis of stibnite with EPMA and inductively coupled plasma-mass spectrom-etry showed enrichment in As,Pb,Sn,Pb,Cu,and Zn,and presented much higher Sb contents and slightly lower S con-tents when compared to the stoichiometric concentrations of Sb and S in stibnite.Statistical analysis of the stibnite trace elements showed correlations for the elemental pairs Cu–Pb,As–Sb,and Sn–Pb,and the coupled substitution equations Sb^(3+)↔Cu^(+)+Pb^(2+),Sb^(3+)↔As^(3+),and Sn^(2+)↔Pb^(2+)may be the major factors governed the incorporating Cu,Pb,As and Sn within the stibnite.Moreover,this study preliminary shows that the antimony mineralization may belong to a car-bonate replacement hydrothermal genesis at Yangla.

Growth and Antimony Bioconcentration Characteristics of Wild Ramie(Boehmeria nivea)under Sb Stress in Different Valence States

[Objectives] To explore the effects of antimony(Sb) in different valence states on the growth and Sb bioconcentration and transfer of wild ramie(Boehmeria nivea). [Methods] A pot experiment was conducted to study the effects of Sb(Ⅲ) and Sb(Ⅴ) stress on plant height, biomass, leaf SPAD value, Sb contents in various organs, Sb bioconcentration and transfer factors, and other indexes. [Results] Both kinds of Sb treatments showed a trend of "first increasing and then decreasing" in plant height as Sb concentration increased. The plant heights in Sb(Ⅲ) treatments with a concentration lower than 1 000 mg/kg and Sb(Ⅴ) treatments with concentrations lower than 4 000 mg/kg were significantly higher than that of the control check(CK);and the Sb(Ⅲ) treatment of the high concentration(4 000 mg/kg) resulted in a significant decrease in plant height, while the 8 000 mg/kg Sb(Ⅴ) treatment still showed an increase in plant height, indicating that the toxicity of Sb(Ⅴ) to wild ramie was significantly lower than that of Sb(Ⅲ). The Sb(Ⅲ) treatments with a concentration lower than 2 000 mg/kg had little effect on the dry weight of the aboveground part, while the treatment with a higher concentration showed a significant decrease;and the dry weights in various concentrations of Sb(Ⅴ) treatments showed no significant differences, but they were significantly higher than the CK and corresponding concentration of Sb(Ⅲ) treatment. Both types of Sb stress could promote the increase of SPAD value in wild ramie leaves, and the performance was significantly higher than the CK. As the concentration of Sb treatment increased, the Sb content in both the aboveground and underground parts showed a significant increase;and the comparison of Sb content under corresponding concentrations of the two types of Sb treatments showed that in the aboveground part, Sb(Ⅲ) was higher than Sb(Ⅴ), while in the underground part, the opposite was true. The bioconcentration factor(BF) of Sb decreased with the increase of Sb treatment concentration overall, and the value of Sb(Ⅴ) was smaller than that of Sb(Ⅲ), but both kinds of Sb stress were significantly smaller than the CK. The transfer factor(TF) of Sb in wild ramie showed a trend of "increasing first and then decreasing" with the concentration of Sb treatment, and various treatments of Sb(Ⅲ) were higher than the CK, with significant differences, while among various treatments of Sb(Ⅴ), except treatment B3, the reduction of which was not significant, other Sb(Ⅴ) treatments showed significant decreases. Comparing the two types of Sb treatments, the BF and TF values of Sb in wild ramie under Sb(Ⅲ) treatments were higher than those under Sb(Ⅴ) treatments, and the TF reached a significant level, indicating that the Sb transport ability of wild ramie under Sb(Ⅲ) treatments was stronger. [Conclusions] This study provides a theoretical basis for the mining of wild ramie Sb restoration genes and the application of large-scale cultivation in ecological restoration.

Unraveling the influence of interface defects on antimony trisulfide solar cells

Antimony trisulfide(Sb_(2)S_(3)) solar cells suffer from large open circuit voltage deficits due to their intrinsic defects which limit the power conversion efficiency.Thus,it is important to elucidate these defects’ origin and defects at the interface.Here,we discover that sulfide radical defects have a significant impact on the performance of Sb_(2)S_(3)solar cells.Moreover,it has been illustrated that these defects at the CdS/Sb_(2)S_(3)interface can be reduced by optimizing the deposition process.A trap distribution model is used to quantify the defect density at the CdS/Sb_(2)S_(3)interface.It shows that the interface defects can be reduced by24% by improving the deposition process.This work reveals the importance of interface defects and guides the future optimization of Sb_(2)S_(3)solar cells.

Effects of Antimony Stress on Root Growth,Antimony Accumulation and Physiological Characteristics of Ramie(Boehmeria nivea(L.) Gaudich.)

[Objectives]This study was conducted to investigate the toxicity of heavy metal antimony(Sb) to ramie(Boehmeria nivea(L.) Gaudich.) and the tolerance response in ramie. [Methods] A pot experiment was conducted to study the effects of Sb stress on root growth and Sb accumulation and transport of the root system of cultivated ramie Zhongzhu No.1, as well as on the physiological characteristics of ramie leaves. [Results] The plant height and root dry weight and volume of Zhongzhu No.1 showed an effect of "promoting at low concentrations and inhibiting at high concentrations" with the increase of Sb concentration, and decreased significantly at the concentration of 4 000 mg/kg, but no obvious toxic growth symptoms were observed. The content of Sb in roots(289.7-508.6 mg/kg) and the root-shoot transfer factor(0.09-0.57) of Zhongzhu No.1 increased with the increase of soil Sb concentration, but the change of Sb bioconcentration factor in roots was opposite, indicating that high concentrations of Sb in soil could promote the absorption of Sb in roots and the transport of Sb to the aboveground part, but the Sb enrichment capacity of roots was relatively reduced with the increase of soil Sb. Sb stress had a certain impact on the physiological characteristics of ramie leaves. With the increase of Sb treatment concentration, MDA, POD and SOD showed a change trend of "first increasing and then decreasing", while CAT gradually increased, indicating that Sb stress caused changes in the physiological characteristics of ramie leaves, thereby affecting plant growth and development. [Conclusions] This study provides a theoretical basis for ecological restoration of ramie in mining areas.

Effect of thickness of antimony selenide film on its photoelectric properties and microstructure

Antimony selenide(Sb2Se3) films are widely used in phase change memory and solar cells due to their stable switching effect and excellent photovoltaic properties. These properties of the films are affected by the film thickness. A method combining the advantages of Levenberg–Marquardt method and spectral fitting method(LM–SFM) is presented to study the dependence of refractive index(RI), absorption coefficient, optical band gap, Wemple–Di Domenico parameters, dielectric constant and optical electronegativity of the Sb2Se3films on their thickness. The results show that the RI and absorption coefficient of the Sb2Se3films increase with the increase of film thickness, while the optical band gap decreases with the increase of film thickness. Finally, the reasons why the optical and electrical properties of the film change with its thickness are explained by x-ray diffractometer(XRD), energy dispersive x-ray spectrometer(EDS), Mott–Davis state density model and Raman microstructure analysis.

羟基氧化铁负载聚丙烯酰胺复合絮凝剂的制备及除锑性能研究

以丙烯酰胺(Acrylamide,AM)为基底,在引发聚合过程中接入羟基氧化铁(FeOOH),合成新型复合絮凝剂羟基氧化铁/聚丙烯酰胺(FeOOH@PAM)。采用BET(Brunauer-Emmett-Teller)、SEM(Scanning Electron Microscope)、XRD(X-ray diffraction)方法对絮凝剂的孔结构、表面性质、晶体结构进行表征,采用FT-IR(Fourier Transforms Infrared Spectroscopy)和XPS(X-ray Photoelectron Spectroscopy)方法探究FeOOH@PAM去除Sb(Ⅴ)的机制。系统考察不同FeOOH掺杂质量分数、pH值、絮凝剂及污染物投加质量浓度、共存离子种类、反应时间对絮凝剂除Sb(Ⅴ)效果的影响以及絮凝过程中的粒径变化情况。结果显示:与羟基氧化铁相比,复合絮凝剂为多孔无定型结构且具有更大的比表面积。在最优条件下,絮凝剂对低质量浓度Sb(Ⅴ)(20μg/L)水源水的去除率在13 min时达98.03%,去除率受HPO_(4)^(3-)和腐殖酸质量浓度的影响较大。絮体主要在慢速搅拌时形成,锑酸盐离子通过静电吸附迅速迁移至絮凝剂表面,与表面位点络合形成絮凝微团聚结沉降而被去除。

城市大气颗粒物中锑污染研究进展

随着工业化和城市化发展,高强度人类活动及锑化合物的广泛使用使城市大气环境中锑污染日趋严重。进入大气中的锑能长时间驻留并随大气环流进行长距离迁移造成跨区域污染。鉴于锑对人体的潜在毒性及致癌性,城市大气环境锑污染引起学术界和国家相关部门的高度重视,然而目前国内关于大气环境中锑的研究仍处于初期阶段。对城市大气颗粒物中锑的来源、污染特征、源解析等方面进行综述,在此基础上对大气环境中锑污染来源、迁移转化过程研究中的锑同位素应用前景进行展望,为进一步开展城市大气颗粒物锑污染研究、防治和环境管理提供参考。

华南锑矿带单锑型锑矿床“两层楼”二元成矿模型——以滇东南木利锑矿床为例

华南锑矿带是我国乃至世界上最重要的锑成矿带,分布有众多大型-超大型单锑型锑矿床。本文以滇东南木利锑矿床作为主要研究对象,并与华南锑矿带内单锑型矿床中最典型的锡矿山和独山锑矿田(床)进行详细的基础地质特征对比研究。发现对于单锑型锑矿田(床)而言,无论是矿田尺度还是矿床尺度,普遍具有“石英-辉锑矿”和“方解石-辉锑矿”两种矿石类型。同一矿田内,部分矿床(段)以“石英-辉锑矿”的矿物组合为主,部分以“方解石-辉锑矿”的矿物组合为主;而矿床(段)尺度内,又往往表现为上部“石英-辉锑矿”型矿物组合,下部为“方解石-辉锑矿”型矿物组合的两层楼模式。该模型的提出对于华南锑矿带单锑型矿床成因研究和找矿勘查具有重要意义。

贵州大厂锑矿区水文地球化学特征及污染来源分析

掌握锑矿开采活动影响下的水文地球化学特征,厘清污染特征及污染来源,对矿山开采活动背景下地下水污染防治与修复具有重要意义。为探明贵州大厂锑矿水环境状况,在地表水和地下水野外取样的基础上,利用水化学分析和同位素测试手段,分析了矿区水化学特征及类型,并研究了矿山酸性水硫酸盐、硫氧稳定同位素的组成特征,分析了污染来源及其污染路径。结果表明:研究区地表水的主要污染指标为Mn、Hg、Sb、SO_(4)^(2-),地下水的主要污染指标为Mn、Sb、Al、Hg,水环境受污染情况严峻;根据硫端元分析,水环境主要污染源来自废渣堆淋滤水和平硐排水。研究结果可为矿区锑污染的长期动态监测、矿业开发活动和生态环境保护提供参考。

锑胁迫对楸树无性系叶片解剖结构的影响

以10个楸树无性系为研究对象,采用室内盆栽的方法,共设置4种浓度的锑胁迫处理,各处理锑元素含量分别为0、600、1200、2000 mg·kg^(-1);以石蜡切片方法观测叶片的解剖结构,探讨锑胁迫对楸树叶片解剖结构的影响。结果表明:除2-8、1-1号2个楸树无性系在2000 mg·kg^(-1)锑胁迫下其叶片中锑含量均下降外,10个楸树无性系在0~2000 mg·kg^(-1)锑胁迫下其叶片中锑含量均随着锑胁迫浓度的增加而增加。在不同浓度的锑胁迫下,5-8、0号2个无性系的叶片厚度均没有显著差异,其余无性系的叶片厚度表现出不同的差异性;随着锑胁迫浓度的增加,不同楸树无性系的叶片厚度表现出不同的变化规律。随着锑胁迫浓度的增加,10个楸树无性系的叶片上表皮厚度和下表皮厚度总体呈现先升高后下降的变化规律。在不同浓度锑胁迫下,10个楸树无性系的叶片组织结构存在一定差异;在600~2000 mg·kg^(-1)锑胁迫下,各楸树无性系平均栅海比排序为5-8号的(0.99)>1号的(0.91)=2-8号的(0.91)>0号的(0.90)>5-2号的(0.89)>8402号的(0.88)=72号的(0.88)>1-1号的(0.86)=20-01号的(0.86)>63号的(0.71)。0~2000 mg·kg^(-1)锑胁迫对楸树无性系叶片结构无明显破坏,楸树对锑具有一定的耐受性。

中国锑产业发展与挑战

锑作为一种关键的小金属,在全球范围内具有重要的战略地位,特别是在电池、阻燃剂、合金、半导体、催化剂和医药等多个关键领域中发挥着重要作用。中国作为世界上最大的锑生产和消费国,掌握着集中的锑资源,主要分布在湖南、广西、西藏、贵州和云南等省份。然而,近年来中国的锑矿资源储量显著下降,资源保障能力减弱,加上勘查投入的减少和新矿发现的不足,使得中国在全球锑资源中的占比下降。面对资源枯竭、技术创新不足、产业结构调整压力、国际市场竞争加剧以及国际贸易环境的不确定性等挑战,本文提出了加强资源勘探与国际合作、推动产业升级与技术创新、建立风险预警与应急机制、优化产业结构与布局、提升行业自律与社会责任以及加强锑资源战略储备等对策建议。这些措施的实施旨在降低锑产业的运营风险,推动产业的可持续发展,从而为保障国家资源安全和促进经济的高质量发展做出积极贡献。

弱光下锑基太阳电池的光谱响应与性能优化

锑基薄膜太阳电池因其制备方法简单,原材料丰富,光电性能稳定等优点而得到了快速发展。其中锑基吸光层材料(硫化锑、硫硒化锑、硒化锑)具有高吸收系数特点,因而在室内或者水下等弱光条件下具有相当大的应用潜力。通过构造两种衰减光谱以研究新型锑基薄膜太阳电池在弱光下的光电响应。首先通过厚度调节硒化锑太阳电池的吸光能力,发现当吸光层厚度较薄时,电池的光电转换效率存在较大差值;而当吸光层厚度过厚时,电池性能又因载流子复合的增大而降低。在吸光层厚度处于合适的0.4~1.2μm之间时,硒化锑太阳电池在长波衰减光谱和短波衰减光谱下都能获得高于16%的转换效率。然后通过硒含量调节锑基太阳电池的光谱吸收范围,发现长波衰减光谱下,锑基太阳电池的器件性能显著高于标准光谱,并且在20%~40%硒含量下能够获得最佳的转换效率。而在短波衰减光谱下,锑基太阳电池的最佳性能出现在硒含量为60%的情况下。因而在弱光条件下,锑基太阳电池的最佳硒含量需要通过具体的光谱特性确定。最后研究了两种衰减光谱下,硫化锑/硒化锑双结叠层太阳电池的光谱响应特性。发现在短波衰减光谱下,叠层太阳电池效率会随着总厚度的增加而增加。而在长波衰减光谱下,叠层太阳电池的最佳性能能够一直保持在较高水平。当叠层电池总厚度为2μm,且硫化锑顶电池厚度在0.5~1.2μm之间时,器件在两种衰减光谱下都能够实现光谱能量在两个子电池中的合理分配,使得叠层电池效率能够保持在20%以上。通过该研究对锑基太阳电池器件结构的合理设计,能够保证单结和双结器件在不同弱光条件下的高性能输出,为高环境适应性的锑基薄膜太阳电池的研发提供技术支持。

Sb_(2)S_(3)/石墨烯负极材料的制备及其储钠性能研究

钠离子电池(sodium-ion batteries,SIBs)具有成本低的潜在优势,有望成为替代锂离子电池(lithium ion batteries,LIBs)的储能设备。为提升钠离子电池的性能,开发出适应钠离子脱嵌的负极材料尤为重要。硫化锑(Sb_(2)S_(3))因其理论比容量高被认为是较好的钠离子电池负极材料。本文使用简单水热法将Sb_(2)S_(3)与石墨烯复合,制备Sb_(2)S_(3)/石墨烯复合材料(Sb_(2)S_(3)/Gr)。结果表明:Sb_(2)S_(3)/Gr作为钠离子电池负极时,不仅表现出良好的电导率(3.5×10~(-3)S/cm)和钠离子扩散速率(4.853×10~(-13)cm~2/s),而且在0.5 A/g的电流密度下,首圈库伦效率为76.27%,经150次循环后的比容量稳定在488 m A·h/g,表现出较高的比容量。Sb_(2)S_(3)/Gr复合材料表现出了极大的应用潜力,为高性能钠离子电池负极材料的研发提供了一定的参考价值。

乙二醇锑中锑含量分析方法比较

介绍了聚酯催化剂乙二醇锑中锑含量分析方法,从分析技术原理、实验设备材料、影响因素、经济适用性等方面进行了对比分析。对比结果表明,3种分析方法适用于不同的分析条件,不同的生产企业和检测单位可以根据自身的需要建立适合自己企业的分析方法。文章的研究内容对聚酯催化剂乙二醇锑中锑含量分析方法的选择具有一定的指导意义,可为相关领域的研究提供一定的参考。

铁锰泥制备多孔复合吸附剂及其对废水中锑的动态吸附研究

利用反冲洗铁锰泥和海藻酸钠(SA)制备了一种多孔复合吸附剂ISG,并用于吸附模拟废水中Sb(Ⅲ),探究了不同造孔材料及其添加量对除锑Sb(Ⅲ)性能的影响,并考察了吸附剂填料层高度、模拟废水中Sb(Ⅲ)初始质量浓度、进液流量对动态吸附锑的影响。结果表明,以固体NaHCO_(3)为造孔材料所制备的多孔复合吸附剂ISSG对模拟废水中Sb(Ⅲ)的去除效果最好,适宜条件下ISSG对Sb(Ⅲ)的去除率最高可达98%,且机械强度良好;在一定范围内,吸附剂填料层高度的升高或模拟废水Sb(Ⅲ)初始质量浓度和进液流量的降低都会延长吸附穿透时间;Yoon-Nelson和Thomas模型对吸附穿透曲线拟合良好(R^(2)>0.91),可准确预测穿透时间和饱和吸附量。

砷锑烟尘与冶炼污酸的联合处置

基于砷、锑在酸性溶液中的溶解差异性,结合砷锑烟尘和冶炼污酸的成分特征,提出氧化酸浸分砷—湿法还原固砷的砷锑烟尘与冶炼污酸的联合处置工艺。结果表明,在过氧化氢加料系数1、过氧化氢质量分数30%、液固比5、温度30℃、浸出时间4 h、污酸酸度1 mol/L条件下,砷的浸出率可达99%以上,所得浸出渣锑含量高达90%,砷含量仅为0.2%,实现了高砷锑烟尘中砷和锑的初步分离;采用氯化亚锡二段还原工艺,在酸度12 mol/L、温度90℃、n(NaCl)/n(As)=3、还原剂系数1、反应时间4 h的条件下,砷还原率可达99.75%,反应后液中锑浓度为6.72 g/L,砷浓度仅为0.17 g/L,实现砷和锑的二次分离。

贵州晴隆锑矿区土壤中锑的形态分布和地球化学模型

以贵州晴隆锑矿区某冶炼厂及周边地区土壤为对象研究了锑的形态分布特征.结果发现,冶炼厂土壤中锑污染严重,含量最高达31265 mg·kg^(-1),但在下游土壤中随距离增加,锑浓度迅速下降到100mg·kg^(-1)以内.XRD和XPS结果显示土壤中主要含锑化合物为锑酸钙(Ca_(2)Sb_(2)O_(7))、锑酸钾(K_(3)Sb_(5)O_(14))以及氧化锑(Sb_(2)O_(5)),锑以五价形态存在.连续提取形态分析表明除残渣态外,厂区附近污染土壤中碳酸盐和金属氧化物的共沉淀态是锑的主要宿主相,而下游土壤中吸附态比例显著升高,说明在迁移过程中土壤中锑的活性增加.构建了以水合铁氧化物和针铁矿作为锑主要活性表面的土壤中锑地球化学多表面形态模型(MSM),当采用1 mol·L^(-1)Na_(2)HPO_(4)提取的锑作为总有效态锑输入值时,该模型可很好地预测不同性质和污染程度的土壤中锑的溶出效应(RMSE=0.29),说明该模型可为准确评估锑冶炼厂周边污染土壤中锑生态毒性和迁移淋溶风险提供有潜力的工具和方法.

Effects of Antimony Stress on Photosynthetic Characteristics of Vegetable Leaves

[Objective] This study aimed to investigate the effects of different concen- trations of antimony and modifier calcium magnesium phosphate on photosynthetic characteristics of edible amaranth, flowering Chinese cabbage, spinach and flowering Chinese cabbage. [Method] By outdoor potting simulation experiment, soil matrixes containing 10.00, 20.00, 50.00, 70.00 and 100.00 mg/kg antimony （Sb3＋） were pre- pared; soil without antimony was used as control （CK）. Each pot was loaded with 0.10 kg/kg vegetable special fertilizer, mixed evenly, and divided into two shares： one share was supplemented with 1.75 g/kg modifier calcium magnesium phosphate and mixed evenly; the other share contained no calcium magnesium phosphate. Af- ter the generation of three true leaves, seedlings with uniform growth were trans- planted into the prepared soil matrixes, eights seedlings per pot. Vegetable seedlings were watered regularly to maintain 70% of field capacity. After 45 d, veg- etable plants were harvested and washed clean with distilled water for measurement of indicators of photosynthetic characteristics. [Result] With the increase of antimony concentration, relative chlorophyll content （SPAD value） and net photosynthetic rate of four vegetable species increased first and then declined, while stomatal conduc- tance of vegetable leaves was linearly reduced. [Conclusion] Appropriately adding modifier calcium magnesium phosphate can effectively improve the photosynthetic characteristics of four vegetable species and reduce the toxic effects of heavy metal antimony on vegetables.