CO₂ mineralization is an effective route to reduce CO₂ emission. But the commercialization of CO₂ mineralization process is impeded by the poor or even negative profit. MgCO₃·3H₂O whisker was prepared by indirect CO₂ mineralization of MgSO₄-(NH₄)₂CO₃ in the presence of Sodium Dodecyl Sulfate (SDS) to improve the profit. MgCO₃·3H₂O whisker with an average length of 40 μm, average diameter of 1 μm, and aspect ratio as big as 40 was successfully prepared with the presence of SDS. SEM, AFM, XRD and TGA were used to characterize the morphology and structure of MgCO₃·3H₂O whisker, and XPS was used to characterize the compositions of MgCO₃·3H₂O crystal planes. The regulating mechanism of MgCO₃·3H₂O whisker growth orientation was studied systematically. The SDS ionizes CH₃(CH₂)₁₁-OSO₃^- in the solution, and then combines with the active site Mg²⁺ complex on the crystal plane in the [100] direction. The (CH₃(CH₂)₁₁-OSO₃)₂Mg faces the liquid phase with the hydrophobic group CH₃(CH₂)₁₁-, which separates the [100] direction from the liquid phase, hindering the growth of the [100] direction crystal plane. Therefore, MgCO₃·3H₂O whisker is oriented and grows easily on the [010] direction with high aspect ratio.

CO ₂矿化是减少CO ₂排放的有效途径。但是，CO ₂矿化过程的商业化受到利润不佳甚至是负利润的阻碍。MgCO ₃ ·3H ₂ O晶须是通过在十二烷基硫酸钠（SDS）存在下间接将MgSO _4-（NH ₄）₂ CO _3的CO ₂矿化制备的，以提高利润。碳酸镁₃ ·3H ₂在SDS的存在下，成功制备了平均长度为40μm，平均直径为1μm，纵横比最大为40的O晶须。SEM，AFM，XRD和TGA表征MgCO ₃ ·3H ₂ O晶须的形貌和结构，XPS表征MgCO ₃ ·3H ₂ O晶面的组成。系统研究了MgCO ₃ ·3H ₂ O晶须生长取向的调控机理。的SDS电离CH ₃（CH ₂）₁₁ -OSO ₃ ^-中的溶液中，然后结合的活性位点的Mg ²⁺在[100]方向的晶体平面上的复合物。（CH ₃（CH ₂）₁₁ -OSO ₃）₂ Mg面对具有疏水基团CH ₃（CH ₂）_11-的液相，该疏水基团将[100]方向与液相分隔开，从而阻碍了[ 100]方向晶面。因此，MgCO ₃ ·3H ₂ O晶须取向并以高纵横比容易在[010]方向上生长。